alternative pathways toward sustainable development and ......dears main focus: 2020-2030, until the...

13
1 Research Institute of Innovative Technology for the Earth ALternative Pathways toward Sustainable development and climate stabilization (ALPS) Project Outline Development of alternative scenarios under the world countries having multiple objects and the different priorities Background and Objective The purpose of this study is to develop alternative scenarios with realistic assumptions that nations, as actors in the global community, have multiple objectives with different priorities. A variety of emissions scenarios for climate change research have been developed so far, and made a due contribution to policy-making in the climate change mitigation efforts. The traditional approaches in modeling exercises for scenario development, however, tend to describe a simplified world under which mitigation or adaptation costs are minimized with the ideal conditions. The reality is more complex: different actors have different policy priorities based on their economic level, natural circumstances and other constraints, which leads to difficulty in creating a coordinated uniform policy, as observed in the COP15 negotiations and in the domestic policymaking processes. Climate change is not the only issue on the global agenda, so it should be addressed in a balanced manner across multiple dimensions. Traditional global abatement scenarios may be too simplified to capture richness of detail and context of the real world situation. The results reveal that climate policy with the highly-idealized premises sometimes does not deliver relevant outcomes, or rather causes unduly confusion to the society. The ALPS project aims at providing alternative plausible future scenarios and through quantification of multiple aspects of society on the assumptions that the real-world society is intrinsically consist of a wide range of values. This approach allows us to inform decision makers of more appropriate strategies toward sustainable development and climate stabilization from longer and wider perspectives. Another focus is to gain a clearer understanding of CO 2 emissions structure on a national, sectoral and technological basis in order to deal with short and mid-term climate challenges. The scenarios on combinations of macro and micro views would generate further insights into climate change mitigation and sustainable development. Socio-economic Scenario Development Modeling simulations are powerful tools to support decision making even though they tend to assume perfect information or perfectly rational behavior. At the same time, it is important to bear in mind that the real world is less elegant and simple. The gap between the real world and virtual model world creates a risk of sending wrong message. Therefore this ALPS project starts from a deep understanding of the current world situation and learns from historical trends in order to avoid such trap. Based on the insights gained from the socio-economic analysis above, narrative storylines with great details are worked out from broader perspectives. There are three pillars for core narrative scenarios; 1) Socio-economic scenarios, 2) Climate Change Policy scenarios, and 3) Representative Concentration Pathways (RCP) scenarios. Furthermore sub-scenarios focus on the subject matter of development and diffusion of climate friendly technologies, economic growth of least developed countries and impacts of inter/intra national economic gap (see Figure 1). With regard to the socio-economic scenarios, a key scenario driver is technological progress, which involves significant uncertainty. Although policy can have impact on technology progress to some extent, other factors can bring larger uncertainty about the future technological change beyond policy impact. It is quite difficult to forecast future innovation and technological progress with high accuracy, so we prepare two discrete scenarios to cover the uncertainty. Scenario A (Medium technological progress scenario) illustrates a gradual shift from dynamic economic development toward a well matured economy especially in developed countries. Scenario B (High technological progress scenario) describes a future world of very rapid economic growth with brilliant

Upload: others

Post on 30-Jan-2021

1 views

Category:

Documents


0 download

TRANSCRIPT

  • 1

    Research Institute of Innovative

    Technology for the Earth

    ALternative Pathways toward Sustainable development and climate stabilization (ALPS) – Project Outline

    – Development of alternative scenarios under the world countries having multiple objects and

    the different priorities

    Background and Objective

    The purpose of this study is to develop alternative scenarios with realistic assumptions that nations, as actors

    in the global community, have multiple objectives with different priorities. A variety of emissions scenarios for

    climate change research have been developed so far, and made a due contribution to policy-making in the

    climate change mitigation efforts. The traditional approaches in modeling exercises for scenario development,

    however, tend to describe a simplified world under which mitigation or adaptation costs are minimized with the

    ideal conditions. The reality is more complex: different actors have different policy priorities based on their

    economic level, natural circumstances and other constraints, which leads to difficulty in creating a coordinated

    uniform policy, as observed in the COP15 negotiations and in the domestic policymaking processes. Climate

    change is not the only issue on the global agenda, so it should be addressed in a balanced manner across multiple

    dimensions. Traditional global abatement scenarios may be too simplified to capture richness of detail and

    context of the real world situation. The results reveal that climate policy with the highly-idealized premises

    sometimes does not deliver relevant outcomes, or rather causes unduly confusion to the society.

    The ALPS project aims at providing alternative plausible future scenarios and through quantification of

    multiple aspects of society on the assumptions that the real-world society is intrinsically consist of a wide range

    of values. This approach allows us to inform decision makers of more appropriate strategies toward sustainable

    development and climate stabilization from longer and wider perspectives. Another focus is to gain a clearer

    understanding of CO2 emissions structure on a national, sectoral and technological basis in order to deal with

    short and mid-term climate challenges. The scenarios on combinations of macro and micro views would generate

    further insights into climate change mitigation and sustainable development.

    Socio-economic Scenario Development

    Modeling simulations are powerful tools to support decision making even though they tend to assume

    perfect information or perfectly rational behavior. At the same time, it is important to bear in mind that the real

    world is less elegant and simple. The gap between the real world and virtual model world creates a risk of

    sending wrong message. Therefore this ALPS project starts from a deep understanding of the current world

    situation and learns from historical trends in order to avoid such trap. Based on the insights gained from the

    socio-economic analysis above, narrative storylines with great details are worked out from broader

    perspectives.

    There are three pillars for core narrative scenarios; 1) Socio-economic scenarios, 2) Climate Change Policy

    scenarios, and 3) Representative Concentration Pathways (RCP) scenarios. Furthermore sub-scenarios focus on

    the subject matter of development and diffusion of climate friendly technologies, economic growth of least

    developed countries and impacts of inter/intra national economic gap (see Figure 1).

    With regard to the socio-economic scenarios, a key scenario driver is technological progress, which involves

    significant uncertainty. Although policy can have impact on technology progress to some extent, other factors

    can bring larger uncertainty about the future technological change beyond policy impact. It is quite difficult to

    forecast future innovation and technological progress with high accuracy, so we prepare two discrete scenarios

    to cover the uncertainty. Scenario A (Medium technological progress scenario) illustrates a gradual shift from

    dynamic economic development toward a well matured economy especially in developed countries. Scenario B

    (High technological progress scenario) describes a future world of very rapid economic growth with brilliant

  • 2

    Research Institute of Innovative

    Technology for the Earth

    innovation.

    As for scenarios of climate change priority in the broader global agenda, we develop three different

    narratives. Scenario I named “Pluralistic society scenario” is approximate to the current real world situation

    with people’s diverse values in nature. This scenario is premised on the existence of various barriers to

    technology diffusion. Scenario II is a “Climate policy prioritized scenario” is a one under which climate

    change policy is prioritized and people’s behavior are rational in the sense that mitigation measures are taken in

    a cost effective way. This assumption was implicitly adopted by most of the traditional climate change

    assessment. Scenario III called “Energy security prioritized scenario” in which each nation puts high priority

    on domestic energy resources from energy security perspective.

    Our future emissions scenarios are fully harmonized with a set of four RCPs for IPCC AR5. The RCPs have

    been selecting from existing literature to span the full range of possible trajectories for future greenhouse

    concentration: a very high emission scenario leading to 8.5 W/m2, a high stabilization scenario leading to 6

    W/m2, an intermediate stabilization scenario leading to 4.5 W/m2 and a low mitigation scenario leading to 2.6

    W/m2 (RCP 3-PD). Additionally we go over 3.7 W/m2 scenario, which comes to five emission pathways in

    total.

    Scenario A:Medium technological

    progress scenario

    Scenario B:High technological progress scenario

    Scenarios for macro-level and socio-economic conditions in the long term

    Climate change policy scenarios

    Scenarios for emission reduction levels

    Scenarios for other climate change policies

    Scenario for the timing of countries’ participation in the

    framework of emission reduction

    Scenario for international offset mechanisms

    (e.g. REDD)

    I:Pluralistic society scenario

    II:Climate policy prioritized scenario

    III: Energy security prioritized scenario

    RCP3.0PD

    RCP4.5

    RCP6.0

    RCP8.5

    Scenario for domestic economic gap

    Scenario for economic development in least developed countries

    Economic scenarios

    Scenario for preventing population decrease in

    developed countries

    Nuclear power scenario

    Scenarios for energy technologies

    Renewable energy scenario

    EV scenario

    Smart grid scenario

    Scenario for oil price

    Scenario for natural resources

    Scenario for agricultural productivity

    Scenarios for other technologies

    ALPS core scenarios

    etc. etc.

    CCS scenario

    etc.

    etc.

    etc.

    Scenario for Geo-engineering

    Figure 1: Scenarios to be developed in the ALPS project

    Model Group

    The ALPS project performs comprehensive modeling scenarios supplemented with the existing models

    developed by RITE. Scenarios associated with climate change need to be developed in the context of

    sustainable development with a wide-ranging set of models to reflect a multifaceted reality. The DNE21+

    Model assesses CO2 emissions from fuel combustion with great details of national, sectoral and technological

    descriptions. Along with the food demand-supply model, fresh water model, and land use model, a wide

    variety of plausible future scenarios and narratives are assessed in an integrated and consistent manner.

    The models are chosen appropriately in accordance with time frame and objectives of the assessment. For

    near and medium term analysis, detailed descriptions of the nation, of sector and of technology are underscored.

    For longer term analysis, interactions between climate impacts and socio-economic activities are more

    highlighted.

  • 3

    Research Institute of Innovative

    Technology for the Earth

    DNE21+ Main focus: 2020-2030, until the year 2050

    DEARS Main focus: 2020-2030, until the year2050, with whole economy and integrated with climate model

    DNE21 Until the year 2150,with whole economy,integrated with climate model

    Simplified climate change model

    Grid-based estimation of climate change

    Non-CO2 GHG ModelMain focus: 2020-2030, until the year 2150

    Model for the analysis of food demand/supply, water resource and land use change (until the year 2150)

    GHGs excluding energy-related CO2

    Energy

    Climate changeEconomy

    Land use, food, water resource

    Assessment model for impact on biodiversity (using BIOME model)

    Assessment model for health impact

    Industrial structural changeFinance

    Model for the analysis of environmentally friendly cities

    Population, GDP

    Energy security assessment model

    Water security assessment modelFood security assessment model

    Gap in domestic income

    Distribution of urban population

    Impact of global warming

    Figure 2: Models for the development of ALPS quantitative scenarios

    Future perspectives based on quantitative understanding of the world

    Adequate understanding of complicated real world situation is necessary to address climate change because

    challenges of global warming are closely linked to the various global agenda. They may not be captured by a

    simplified index. In this study, we explore a range of indices from both macro perspective and micro perspective,

    to understand current situation and to depict future prospects.

    - Socio-economic trends and future perspectives

    Figure 3 and Figure 4 respectively show global population and global GDP of the socio-economic scenarios,

    “Scenario A: Medium technological Progress Scenario” and “Scenario B: High Technological Progress

    Scenario.” For Scenario A, we assume medium population growth, referring to the UN medium population

    projection of the “2008 Revision of the World Population Prospects” In this scenario global population will get

    to 9.1 billion by 2050, and expected to grow stably to reach 9.3 billion by 2100. Alternatively Scenario B is

    characterized by rapid economic growth due to higher technological progress. In this scenario global population

    moderately increases from 6.1 billion in 2000 to 8.6 billion people by 2050, and then peaks out at 7.4 billion by

    2100. The average global GDP growth rate over the period of 2000-2050 is 2.5% per year for Scenario A and

    2.8 % year for Scenario B. Over the 21st century GDP increases at a growth rate of 2.0% per year in Scenario A

    and 2.3% per year in Scenario B.

  • 4

    Research Institute of Innovative

    Technology for the Earth

    0

    20

    40

    60

    80

    100

    120

    140

    160

    1950 1975 2000 2025 2050 2075 2100

    人口(億人)

    Range in SRES

    SRES A2(IIASA1996 High)

    SRES B2(UN1998 Medium)

    SRES A1/B1(IIASA1996 Low)

    IIASA2007(10-90 percentile)

    UN2008 medium

    UN2008 High

    UN2008 Low

    Range in UN2008

    Range in ALPS

    ALPS-Scenario B

    ALPS-Scenario AP

    op

    ula

    tio

    n (

    100 m

    illio

    n)

    Figure 3 Global Population Scenarios

    0

    50

    100

    150

    200

    250

    300

    350

    400

    1980 1990 2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100

    GD

    P (T

    rilli

    on 2

    000 U

    SD

    )

    ALPS-Scenario A

    ALPS-Scenario B

    Range in SRES

    SRES A2

    SRES A1 SRES B1

    SRES B2

    EIA-IEO2010

    IEA-ETP2010

    Range in ALPS

    Figure 4 Global GDP Scenarios

    Note: Historical data to 2008 and RITE projection after 2009. SRES stands for the “Special Report on Emissions

    Scenarios”, a report prepared by the IPCC. We adjust them at 2000 prices since SRES is based on the 1990 prices.

    EIA-IEA 2010 data at 2005 prices is also aligned with the base-year. PPP based IEA-ETP 2010 is converted into MER

    accounts in accordance with the global average ratio of PPP/MER under the ALPS Scenario A’s assumptions.

    United States30%

    EU1524%

    EU27(+12)1%

    Japan14%

    Other Annex I6%

    China6%

    India2%

    Other Asia5%

    Latin America7%

    Africa2%

    Other Non Annex I

    3%

    2005

    United States19%

    EU1513%

    EU27(+12)2%

    Japan6%

    Other Annex I6%

    China22%

    India7%

    Other Asia7%

    Latin America8%

    Africa5%

    Other Non Annex I

    5%

    2050

    United States15%

    EU159% EU27(+12)

    1%

    Japan3%

    Other Annex I4%

    China16%

    India11%

    Other Asia12%

    Latin America11%

    Africa11%

    Other Non Annex I

    7%

    2100

    Figure 5 Share of world GDP in Scenario A

  • 5

    Research Institute of Innovative

    Technology for the Earth

    - The current state of energy efficiency

    The widespread deployment of a range of energy efficient technologies can lead to a more secure and

    sustainable future. Keeping track of details of technology situation at sector and national level, sector wise

    energy efficiency is estimated on a technology basis. This allows to analyze potential impact of CO2

    emissions reduction through accelerating technology deployment.

    0

    5

    10

    15

    20

    25

    30

    35

    Pri

    mary

    en

    erg

    y c

    on

    su

    mp

    tio

    n o

    f b

    asic

    o

    xyg

    en

    fu

    rnace s

    teel

    (GJ/t

    -cru

    de s

    teel) 2000 2005

    0

    1

    2

    3

    4

    5

    6

    Th

    erm

    al e

    ne

    rgy c

    onsu

    mption

    of clinke

    r

    pro

    du

    ctio

    n (

    GJ/t

    -clinke

    r)

    2005

    Figure 6 Energy efficiency in steel and cement sector

    Note: The analysis above was carried out by RITE through other research project.

    - Power generating costs and their projections

    As for power sector, current and future generation costs and technology perspectives were widely

    surveyed. Figure 7 shows projections of power generating costs including grid costs. Costs of coal-fired

    power plants and nuclear power range between 8yen/kWh and 12yen/kWh, of gas-fired power plants

    between 10yen/kWh and 14yen/kWh, of wind power plants between 16yen/kWh and 18yen/kWh, and of

    solar PV between 55yen/kWh and 63yen/kWh. Costs of renewable sources themselves are expected to

    decline as capacities expand, whereas their ancillary costs are expected to grow because locational

    conditions become less favorable and because additional investments are required for grid stability to

    secure reliable power supply. While the costs of wind power generation is nearly equivalent to the costs of

    fossil power plants when its installed capacity is small, wind power is getting lack of competitiveness in

    the power market as its capacity grows.

    PV

    Wind

    Nuclear power

    Coal

    Natural gasElectricity

    prices

    0

    10

    20

    30

    40

    50

    60

    70

    2005 2010 2015 2020 2025 2030 2035 2040 2045 2050

    発電単価(円

    /kW

    h)

    Po

    wer

    gen

    era

    tio

    n c

    osts

    (Y

    en

    /kW

    h)

    Figure 7 Projections of power generating costs by generation type in Japan

  • 6

    Research Institute of Innovative

    Technology for the Earth

    - Future outlook of crude steel production

    The Iron and Steel sector is one of the largest energy intensive industries and has a significant impact

    on global energy consumption and CO2 emissions. As shown Figure 8 and Figure 9 we extrapolate future

    crude steel production and scrap availability. Crudes steel production in China has expanded rapidly in the

    past decade, but their production level will be saturated sooner or later, judging from historical data on

    apparent steel consumption per capita. Alternatively steel production in India is expected to increase. We

    estimate global steel production is expected to reach approximately 2.2 billion tons per year by 2050.

    There are mainly two types of steel production process, the scrap/EAF route and the BF/BOF route. In

    terms of energy/carbon-intensity, the scrap/EAF is less intensive because there is no need to reduce iron

    ore to iron and because it cuts out the need for the ore preparation and coke-making steps. In that sense it

    is crucial to estimate scrap availability and potential of EAF in projecting global CO2 emissions from iron

    and steel sector. One of the biggest challenges in the estimation is to know the volume of social stock of

    steel scrap and their availability. With limited information and data, we explore two approaches to assess

    future scrap availability in the world, referring to previous studies. Global availability of process scrap and

    obsolete scrap increases ranging from 0.8 to 1.0 billion tones per year in 2050. The volume of home scrap

    is estimated to reach 0.15 million tones and the sum of the total scrap availability, including home scrap,

    process scrap and obsolete scrap, is expected to range from 0.95 billion tones to 1.15 billion tones whereas

    IEA(2009) estimates around 1.25 billion tones scrap availability in 2050. This suggests the fact that IEA

    overestimates scrap availability by about from 0.1 billion tones to 0.3 billion tones.

    OECD Europe

    OECD North America

    OECD Pacific

    China

    India

    Other developing Asia

    Economies in transition

    Africa and Middle East

    Latin America

    0

    500

    1,000

    1,500

    2,000

    1990 2000 2010 2020 2030 2040 2050

    Cru

    de

    ste

    el p

    rod

    uct

    ion

    (M

    illio

    n t

    on

    /yr)

    Statistics

    Scenario

    Figure 8 Historical crude steel production and its projection by region

    0

    200

    400

    600

    800

    1,000

    1,200

    1,400

    1,600

    1950 1975 2000 2025 2050 2075 2100

    Scra

    p c

    on

    sum

    pit

    ion

    (M

    illio

    n t

    on

    /yr)

    Scenario (based on estimation logic no.2)

    Scenario (based on estimation logic no.1)

    Estimate (based on logic no.2)

    Estimate (based on logic no.1)

    Prompt scrap + obsolete scrap (Fe-equivalent)

    Figure 9 Global historical scrap (prompt scrap and obsolete scrap) consumption

    and projection of future scrap availability

  • 7

    Research Institute of Innovative

    Technology for the Earth

    GHGs emissions and their emissions reduction projections

    Global GHGs emissions were 32 Gt CO2 equivalent (CO2-eq) in 1990 and 39 Gt CO2-eq. Without

    climate policy, they are estimated to reach 55 Gt CO2-eq in 2020 and around 79 Gt CO2-eq in 2050, which

    is more than twice the current emissions level. Particularly emissions from developing countries are

    expected to grow faster as their economy expands.

    0

    10

    20

    30

    40

    50

    60

    70

    80

    1990 2000 2010 2020 2030 2040 2050

    GH

    G e

    mis

    sio

    n[G

    tCO

    2eq./yr]

    Other Non Annex I

    Africa

    Latin America

    Other Asia

    India

    China

    Other Annex I

    Japan

    EU27(+12)

    EU15

    United States

    Figure 10 Global GHG emission outlook

    Note: Historical data to 2008 and RITE projection after 2009 based on the “Scenario A: Medium technological Progress

    Scenario” in combination with “Scenario I: Pluralistic society scenario”, which is approximate to the real-world social

    behavior. GHGs cover the Kyoto’s six gases. Emissions from LULUCF, international aviation and maritime transport

    are excluded.

    Annex I exc. US: 22%

    Annex I: 58%

    Annex I exc.

    US: 27%

    United States19%

    EU1513%

    EU27(+12)4%

    Japan4%

    Other Annex I

    18%

    China12%

    India5%

    Other Asia6%

    Latin America

    7%

    Africa5%

    Other Non Annex I

    7%

    1990

    United States18%

    EU1511%

    EU27(+12)2%

    Japan4%

    Other Annex I

    10%China19%

    India6%

    Other Asia9%

    Latin America

    8%

    Africa6%

    Other Non Annex I

    7%

    2005

    United States15%

    EU159%

    EU27(+12)2%

    Japan3%Other

    Annex I8%

    China25%

    India8%

    Other Asia9%

    Latin America

    7%

    Africa6%

    Other Non Annex I

    8%

    2020

    United States12%

    EU157%

    EU27(+12)3%

    Japan1%

    Other Annex I

    7%

    China24%India

    11%

    Other Asia10%

    Latin America

    8%

    Africa9%

    Other Non Annex I

    8%

    2050

    Figure 11 GHG emissions by region

  • 8

    Research Institute of Innovative

    Technology for the Earth

    Figure 12 and Figure 13 illustrate regional and technological contribution to cut global emissions in

    half by 2050 respectively. They imply significant contribution by energy efficiency to CO2 reduction.

    From longer perspective, nuclear power generation, renewable energy and Carbon capture and storage

    (CCS) will play an important role in 2050. From regional perspective, developing countries have larger

    potential to reduce emissions, which suggests that global actions are necessary to meet the target.

    0

    10

    20

    30

    40

    50

    60

    2000 2010 2020 2030 2040 2050

    Ene

    rgy-

    rela

    ted

    CO

    2 E

    mis

    sio

    ns

    and

    Re

    du

    ctio

    ns

    [GtC

    O2

    /yr]

    Year

    Electricity generation: CCS

    Electricity generation: Renewables

    Electricity generation: Nucleaer

    Electricity generation: Efficiency improvement & Fuel switching among fossil fuels

    Other energy conversion sector

    Residential sector

    Transportation sector

    Industrial sector

    CO2 Emission

    17%

    14%

    15%

    11%

    43%

    Baseline emissions:57 GtCO2/yr

    Emissions when halving global emissions: 13 GtCO2/yr

    Figure 12 Reduction contribution by technology for halving global emissions by 2050 (Scenario A-I)

    Note: Estimated by RITE DNE21+. CO2 from fuel combustion only. Emissions from international aviation and maritime

    transport are excluded.

    0

    10

    20

    30

    40

    50

    60

    2000 2010 2020 2030 2040 2050

    Ene

    rgy-

    rela

    ted

    CO

    2 E

    mis

    sio

    ns

    & R

    ed

    uct

    ion

    s[G

    tCO

    2/y

    r]

    Year

    Other non-OECD

    Other OME

    India

    China

    Other OECD

    USA

    CO2 emissions

    6%

    10%

    24%

    17%

    13%

    30%

    Baseline emissions:57 GtCO2/yr

    Emissions when halving global emissions: 13 GtCO2/yr

    Figure 13 Reduction contribution by region for halving global emissions by 2050 (Scenario A-I)

  • 9

    Research Institute of Innovative

    Technology for the Earth

    Scenarios on the climate change priority in the broader global agenda

    The differences among three scenarios (I, II and III) toward 2050 is analyzed by DNE21+ model with

    socio-economic assumptions of Scenario A. In our real world, energy efficient appliances and technologies

    are not necessarily chosen by consumer due to the existence of the efficiency gap. We assume relatively

    shorter payback period (or higher implicit discount rate) as observed in the real world situation for

    Scenario I, “Pluralistic society scenario”, while Scenario II, namely “Climate policy prioritized scenario”,

    is characterized by the longer payback period. Figure 14 provides an idea of difference in technology

    choice between Scenario I and Scenario II. Scenarios III “Energy security prioritized scenario” is

    differentiated in higher tariff barriers for oil and gas export.

    (Source) IEA ETP 2010

    The total cost of standard technology is

    lower than the one of efficient technology

    with these implicit costs.

    The total cost of efficient technology will

    be lower than the one of standard

    technology if these implicit costs are

    removed through bottom-up measures.

    These implicit costs are higher in

    developing countries, and lower in

    Japan. In general, these costs are

    higher in residential sector.

    Scenario I

    Scenario II

    Figure 14 Image of technology choice

    Figure 15 and Figure 16 identify differences in total primary energy supply and power generation mix

    respectively for the baseline case among Scenario I, II, and III. The share of nuclear power generation is

    higher in Scenario III than in Scenario I. Power generation mix of Scenario II is characterized by higher

    share of nuclear power generation and of highly efficient fossil fuel power plants regardless of their

    expensive initial costs.

    0

    2000

    4000

    6000

    8000

    10000

    12000

    14000

    16000

    18000

    20000

    22000

    24000

    Scen

    ario

    I

    Scen

    ario

    II

    Scen

    ario

    III

    Scen

    ario

    I

    Scen

    ario

    II

    Scen

    ario

    III

    Scen

    ario

    I

    Scen

    ario

    II

    Scen

    ario

    III

    Y2020 Y2030 Y2050

    Pri

    mar

    y En

    erg

    y Su

    pp

    ly[M

    toe

    /yr] Others

    Biomass & Waste

    Hydro & Geothermal

    Nuclear

    Natural Gas

    Oil

    Coal

    Figure 15 Baseline of total primary energy supply (Scenario I, II and III)

  • 10

    Research Institute of Innovative

    Technology for the Earth

    0

    5000

    10000

    15000

    20000

    25000

    30000

    35000

    40000

    45000

    50000

    Scen

    ario

    I

    Scen

    ario

    II

    Scen

    ario

    III

    Scen

    ario

    I

    Scen

    ario

    II

    Scen

    ario

    III

    Scen

    ario

    I

    Scen

    ario

    II

    Scen

    ario

    III

    2020 2030 2050

    Po

    we

    r ge

    ne

    rati

    on

    [TW

    h/y

    r]

    PV

    Wind

    Biomass-High

    Biomass-Low

    Hydro&Geothermal

    Nuclear

    Gas-CHP

    Gas-High

    Gas-Middle

    Gas-Low

    Oil-CHP

    Oil-High

    Oil-Middle

    Oil-Low

    Coal-High

    Coal-Middle

    Coal-Low

    Figure 16 Baseline global power generation (Scenario I, II and III)

    Figure 17 compares marginal abatement costs to reduce global emissions in half among Scenario I, III,

    and II. Scenario I and III imply higher carbon prices due to longer payback period in accordance with the

    real world situation, while Scenario II leads to lower marginal abatement costs. This result suggests that

    explicit carbon prices can be very high to meet the targets, which causes great difficulty in implementation,

    and that detailed measures to remove market barriers to energy efficiency can lower mitigation costs as

    described in Scenario II.

    0

    50

    100

    150

    200

    250

    300

    350

    400

    450

    500

    2000 2010 2020 2030 2040 2050

    CO

    2 m

    argi

    nal

    ab

    ate

    me

    nt

    cost

    [$/t

    CO

    2]

    Year

    Scenario I

    Scenario II

    Scenario III

    Scenario I and III

    Scenario II

    Figure 17 CO2 marginal abatement cost in Scenario I, II and III

  • 11

    Research Institute of Innovative

    Technology for the Earth

    Socio-economic scenarios and emissions pathways

    The divergence between Scenario A and Scenario B and among the RCP scenarios are analyzed with

    the underlying assumptions of Scenario I, using DNE21 model, which has a simpler structure but longer

    timeframe than DNE21+ has. Figure 18 shows global CO2 emissions from fuel combustion for the

    baseline cases of Scenario A (Medium Technology Progress) and Scenario B (High Technology Progress),

    and emission pathways of each RCP category. Given the uncertainty of economic growth and

    technological change, it is assumed that the baselines for global CO2 emissions make little difference

    between Scenario A and Scenario B. Their global CO2 emissions are expected to double by 2050 and triple

    by 2100. The atmospheric CO2 concentration in 2100 will range approximately from 700 to 770

    ppm-CO2.

    ベースライン

    -20

    0

    20

    40

    60

    80

    100

    120

    1975 2000 2025 2050 2075 2100

    CO

    2 e

    mis

    sio

    ns f

    rom

    en

    erg

    y (

    GtC

    O2

    /yr)

    RITE ALPS-A

    RITE ALPS-B

    ALPS-A650ppmCO2 (RCP6.0)

    ALPS-A550ppmCO2 (RCP4.5)

    ALPS-A450ppmCO2

    ALPS-A375ppmCO2

    RCP8.5 (MESSAGE)

    RCP6.0 (AIM)

    RCP4.5 (MiniCAM)

    RCP3-PD (IMAGE)

    Figure 18 Baseline scenario for global CO2 emissions from energy

    300

    400

    500

    600

    700

    800

    2000 2020 2040 2060 2080 2100

    Atm

    osp

    heric C

    O2

    co

    ncentr

    atio

    n (

    pp

    m-C

    O2)

    RITE ALPS-A

    RITE ALPS-B

    ALPS-A650ppmCO2 (RCP6.0)

    ALPS-A550ppmCO2 (RCP4.5)

    ALPS-A450ppmCO2

    ALPS-A375ppmCO2

    Figure 19 Trajectories of atmospheric CO2 concentration

    Figure 20 provides an insight into a loss of per cent GDP to meet the required mitigation target for a

    given RCP scenario. There are little differences in GDP loss between 2050 and 2100. The 375 ppm-CO2

    (corresponding to 350 ppm-CO2 eq) scenario gives approximately 4% GDP loss and the 450 ppm-CO2

    (corresponding to 550 ppm-CO2 eq) scenario is about 3%. The gap between Scenario A and Scenario B is

    also small.

    Baseline

  • 12

    Research Institute of Innovative

    Technology for the Earth

    GDPロス(%)

    限界削減費用

    ($/tCO2)

    ALPS

    Figure 20 Global GDP loss for each stabilization level (Compared with IPCC AR4)

    Analysis of indicators on sustainable development

    Maintaining a subtle balance between mitigation efforts and other global challenges enhances social

    welfare and ensures sustainability of mitigation actions because a particular set of values and norms

    constitute our real world collectively. We therefore assess our scenarios from a broad set of aspects to

    understand climate change mitigation measures in the wider context of sustainable development.

    Figure 21 and Figure 22 illustrate examples of energy security evaluation according to the IEA’s index.

    The baseline scenario indicates that vulnerability to energy security risks is expected to increase toward

    2050. It is noteworthy that energy system can be more vulnerable than the baseline in the scenario cutting

    global CO2 emissions in half by 2050. Energy security will be enhanced in the “Energy Security Scenario”

    of our scenario III based on our assessment. Figure 23 shows water-stressed population. Scenarios are also

    examined by other indexes with multiple criteria.

    0

    2000

    4000

    6000

    8000

    10000

    12000

    14000

    US

    W. E

    uro

    pe

    E.E

    uro

    pe

    FSU

    ME, T

    urk

    ey,

    Nort

    h A

    fric

    a

    Jap

    an

    Chin

    a

    Indi

    a

    Kore

    a, A

    SEAN

    World

    avera

    ge

    Energ

    y s

    ecurity

    index

    Y2000

    Y2050 - Baseline

    Y2050 - 50% reduction in 2050Level of vulnerability

    Figure 21 Energy security index by region (Scenario A-I)

    GDP loss

    (%)

  • 13

    Research Institute of Innovative

    Technology for the Earth

    0

    1000

    2000

    3000

    4000

    5000

    Sce

    na

    rio

    I

    Sce

    na

    rio

    II

    Sce

    na

    rio

    III

    Sce

    na

    rio

    I

    Sce

    na

    rio

    II

    Sce

    na

    rio

    III

    Y2000 Baseline 50% reduction in 2050

    En

    erg

    y s

    ecu

    rity

    ind

    ex

    Gas Oil

    Y2050

    Level of vulnerability

    Figure 22 Global weighted average of energy security index for each scenario

    0

    200

    400

    600

    800

    1000

    1200

    1400

    U.S

    .

    Canada

    Centr

    al A

    merica

    Bra

    zil

    Oth

    er S

    outh

    Am

    erica

    West

    ern

    Euro

    pe

    East

    ern

    Euro

    pe, oth

    er

    FS

    U

    Russia

    Nort

    h A

    fric

    a, M

    iddle

    East

    South

    east A

    fric

    a

    South

    west

    Afr

    ica

    Japan

    Chin

    a

    Oth

    er E

    ast A

    sia

    South

    east A

    sia

    India

    Oth

    er S

    outh

    Asia

    Oceania

    Wa

    ter-

    str

    es

    se

    d p

    op

    ula

    tio

    n

    (millio

    n)

    2000

    2030 Baseline

    2030 50% reduction in 2050

    2050 Baseline

    2050 50% reduction in 2050

    Figure 23 Water-stressed population by scenario, period and region

    Expected Outcome

    Synthetic scenarios toward sustainable development and climate stabilization are expected to be generated

    in a consistent and quantitative manner by the end of project period, March 2012. This study will provide

    substantial insight into alternative pathways and catches the implied meaning from the quantitative assessment in

    order to guide our future actions.

    Findings and lessons learned from this research project, including scenario analysis, are returned to society.

    The results of this study are expected to not only make scientific contribution to the IPCC but also to serve as

    fundamental information for decision making on global and domestic climate change policy.

    Project Period

    From April 2007to March 2012

    Contact to:

    Keigo Akimoto

    Group Leader, Systems Analysis Group

    Research Institute of Innovative Technology for the Earth (RITE)

    9-2 Kizugawadai, Kizugawa-shi Kyoto 619-0292 JAPAN

    PHONE: +81-774-75-2304 FAX: +81-774-75-2317 E-mail: [email protected]

    Update: April 2011

    mailto:[email protected]