getting into and out of hot water - weatheraction · co2 after r.a. berner, 2001 (geocarb iii) 9....

28
GETTING INTO AND OUT OF HOT WATER Peter F Gill [email protected] 1

Upload: others

Post on 12-Feb-2021

0 views

Category:

Documents


0 download

TRANSCRIPT

  • GETTING INTO AND

    OUT OF HOT WATER

    Peter F Gill

    [email protected]

    1

  • MELANIE PHILLIPS, DAILY MAIL,

    12 JANUARY 2004

    “The claim of man-made global

    warming represents the decent of

    science from the pursuit of truth into

    politicised propaganda. The fact that

    it is endorsed by the top scientist in

    British government shows how deep

    the rot has gone.”

    2

  • THE INSTITUTE OF PHYSICS, CLIMATE

    CHANGE PREDICTION, 2005

    “This paper, produced on behalf of the Institute of

    Physics by Professor Alan J. Thorpe, explains how

    predictions of future climate change are made using

    climate models. It is hoped that the paper will

    increase believability in these models and be

    persuasive that anthropogenic activity is likely to be

    causing global warming. It aims to convince policy-

    makers, the general public and the scientific

    community that the threats posed by global climate

    change are real”

    3

  • Richard S. Lindzen, CCNet 45/06 -

    13 March 2006

    A question rarely asked, but nonetheless important,

    is whether the promotion of alarmism is really good

    for science? The situation may not be so remote from

    the impact of Lysenkoism on Soviet genetics.

    However, personally, I think the future will view the

    response of contemporary society to 'global

    warming' as simply another example of the

    appropriateness of the fable of the Emperor's New

    Clothes. For the sake of the science, I hope that

    future arrives soon.

    4

  • CRUDE ESTIMATE OF CURRENT GREENHOUSE EFFECT

    TSFC = Te 4

    Where: TSFC is temperature of air near Earth’s surface Te is the effective infrared radiation emission temperature Г is an average transmittance of infrared radiation The simplification wrongly ignores other heat transfer mechanisms Thorpe estimates Te ≅ 255K With current concentrations of greenhouse gases Thorpe estimates Г at 0.2 Inserting these figures results in TSFC ≅ 287K or about 14

    0C

    5

  • CURRENT RELATIVE CONTRIBUTIONS

    TO GREENHOUSE EFFECT

    • Water vapour 95.00%• Carbon Dioxide 3.62%• Methane 0.36%• Nitrous Oxide 0.95%• Other 0.07%NB Anthropogenic contribution to atmospheric

    carbon dioxide is about 4% of total which

    equates to around 0.15% of GHE.

    6

  • WATER VAPOUR

    • As water vapour is by far the most important greenhouse gas changes in the amount in the

    atmosphere are likely to be more important than

    similar percentage changes in carbon dioxide

    • Evaporation of ocean water is a function of temperature, solar irradiance and wind. For a fixed

    temperature the latter two factors predominate.

    • Link between carbon dioxide and water vapour is mainly ocean temperature.

    7

  • CARBON DIOXIDE• Not a pollutant• Essential for life

    • It is a fiction that the pre-industrial content was constant and ideal at 290ppm

    • Recent Earth’s history (last 600 million years) shows7000ppm down to 500ppm in Paleozoic

    Range 1000 - 2500ppm in Mesozoic

    From 1000ppm down to 400ppm in Cenozoic

    • Current level is lowest since the end of the Paleozoic• Oceans contain 60 times present atmospheric level

    8

  • GLOBAL TEMPERATURE AND ATMOSPHERIC CO2 OVER GEOLOGIC TIME

    Late Carboniferous to Early Permian time (315 mya -- 270 mya) is the only time period in the last 600 million years when both atmospheric CO2 and temperatures were as low as they are today (Quaternary Period ).Temperature after C.R. Scotese http://www.scotese.com/climate.htmCO2 after R.A. Berner, 2001 (GEOCARB III)

    9

  • CURRENT ATMOSPHERIC CO2

    LEVELS & EXCHANGES

    • 2,700 gigatons CO2 in atmosphere (380ppm)• Current exchanges with biosphere & oceans

    at 440 and 330 gigatons respectively totalling

    770 gigatons

    • Anthropogenic CO2 emissions currently circa 26 gigatons

    • IPCC summary documents mention residence time of CO2 in atmosphere at 50 – 250 years

    10

  • Effective atmospheric CO2 lifetimeThe effective lifetime for CO2 in the atmosphere, can be determined by the help of radioactive, radiogenic, and stable isotopes.

    All measurements with different methods show short effective lifetimes for atmospheric CO2, only ca.5 - 6 years .

    Sundquist (1985); Segalstad (1998) 11

  • 12

  • 13

    CO2 VALUE OF 290 ppmv selected by

    Callendar is now used in models

    Encircled values were selected by Callendar

    Redrawn after Fonselius et al.. 1956.

  • 14

    Callendar used only 1%

    of >90 000 CO2 measurements

    without such selection

    between 1812 to 1962 (Beck, 2006)

    19th century CO2 concentration

    averaged 335 ppmv(Slocum, 1955)

  • Siple Station Ice Core Data Shifted 82

    Years

    *************************************************************************CO2

    Date of Date air concentration inDepth Samples ice enclosed extracted air(m) measured (yr AD) (yr AD) (ppmv)

    187.0-187.3 10 1663 1734-1756 279177.0-177.3 10 1683 1754-1776 279162.0-162.3 9 1723 1794-1819 280147.0-147.2 10 1743 1814-1836 284128.0-129.0 47 1782 1842-1864 288111.0-112.0 26 1812 1883-1905 297102.0-103.0 26 1832 1903-1925 30092.0-93.0 25 1850 1921-1943 30682.0-83.0 28 1867 1938-1960 31176.2-76.6 11 1876 1947-1969 31272.4-72.7 11 1883 1954-1976 31868.2-68.6 8 1891 1962-1983 328

    *************************************************************************

    15

  • (BERN GROUP: Neftel et al., 1985; Friedli et al. 1986). The age of air bubbles in SIPLE ice deposited in 18 91 was „corrected” by 82 years to 1973 .

    All Siple datashifted 82 years

    5 bars

    15 bars

    328 ppmv in 1891

    Decrease of CO 2due to formation ofclathrates at pressureabove 5 bars

    MOTHER OF ALL CO 2 HOCKEY CURVES: SIPLE, ANTARCTICA

    CO2 solubility incresed with depth 3 times

    16

  • 17

    BECK, 2007. Energy & Environment, 18:259-282

    90 000 CO2 CHEMICAL MEASUREMENTS IN THE ATMOSPHERE, 1812 - 1961

    (ACCURACY 1 TO 3%). MOST IGNORED BY CALLENDAR

    proxy

    SIPLE ice core

    Mauna Loa

    1855

    19421820

    direct chemical

    THESE DIRECT ATMOSPHERIC MEASUREMENTS ARE IGNORED BY IPCC

    INSTEAD PROXY ICE CORE DATA ARE USED, WHICH ARE ARTEFACTS

  • PROXY DATA IS ONLY INDICATIVE

    • Zbigniew Jaworowski has shown that carbon dioxide content of ancient atmospheres

    deduced from ice cores is unreliable

    • ZJ cites around 20 processes (physical, chemical and physical chemical) cause CO2

    depletion relative to O2 & N2

    • ZJ estimates that 30-50% (variable) of CO2 is lost from ice inclusions

    • It is clear that ‘short term’ detail is lost

    18

  • RECENT PAST RAPID CHANGES IN

    CO2 LEVELS

    • 1820 – 1847 Average change -32 gigatons/yr• 1855 – 1868 Average change -44 gigatons/yr• 1942 – 1953 Average change -78 gigatons/yr• It follows that the variability of carbon dioxide

    emission and absorption by natural processes

    exceed current anthropogenic emissions

    19

  • AREAS FOR MORE RESEARCH

    • Sun – Earth interactions

    • Earth’s Heat transfer mechanisms • Mechanisms for changes of water evaporation rates

    from oceans, soils, vegetation etc.

    • Clouds• Mechanisms for changes in carbon dioxide (natural)

    sinks

    • Mechanisms for changes in residence times of greenhouse gases in the atmosphere

    20

  • END OF PRESENTATION

    21

  • Timescales and mechanisms of climate

    change

    • Four timescales to consider:

    – Tectonic (millions of years)– Orbital (hundreds of thousands of years)– Millennial (thousands of years)– Decadal (tens of years)

    • Different predominant mechanism driving the change depending upon timescale

    22

  • Timescale Predominant driving mechanism

    Rate of climate change

    Tectonic Plate tectonics, volcanic activity

    Changes occurring over millions of years

    Orbital Changes in position of Earth’s orbit around sun

    100,000’s to 1000’s years (e.g. glacial-interglacial cycles)

    Millennial Solar variability, changes in ocean circulatory patterns (THC)

    1000’s to

  • Changes in atmospheric CO2 over tectonic timescale

    a) results from Geocarb model (Berner, 2004)

    b) results from fossil soil carbonates (Ekart et al., 1999)

    Approx. present day

    values

    2050 values

    24

  • Changes in atmospheric CO2 and temperature over orbital timescales

    Pre-

    industrial

    levels

    Petit et al., 1999, Nature,

    Currently at

    380 ppmv

    25

  • 26

    CO2 IN AIR 6800 TO 8700 YEARS B.P.. BASED ON STOMATA OF FOSSIL BIRCH LEAVES FROM DENMARK,

    AND ON ICE CORE FROM TAYLOR DOME, ANTARCTICA (LEFT LINE). AFTER WAGNER ET AL., 2002.

    stomataIce core

    difference up to

    >60 ppmv

    Holocene Warm Period

  • 27

    CHEMICAL MEASUREMENTS OF CO2 CONCENTRATION IN AIR (BECK, 2007),

    AGREE WITH

    TEMPERATURE FLUCTUATIONS AT 5 ANTARCTIC SITES (SCHNEIDER et al. 2006)

    temperature

    5 ice cores

    CO2 chemical

    1820

    1855

    19421990

    Schneider et al. STRANGE CONCLUSION (black thick line):

    „ANTARCTIC TEMPERATURES HAVE INCREASED BY ABOUT 0.2OC SINCE THE LATE 19TH

    CENTURY”.

    IN FACT THE TEMPERATURE DID NOT CHANGE SINCE THE BEGINNING OF 19TH CENTURY.

  • BOOKS THAT TELL A DIFFERENT STORY “Air Con” - The Seriously Inconvenient Truth about Global Warming Ian Wishart, Howling at the Moon Publishing Ltd 200 9 ISBN 978-0-9582401-4-7 “Red Hot Lies” Christopher C Horner, Regnery Publishing, Inc. 2008 ISBN 978-1-59698-538-4 “An Appeal to Reason – A Cool Look at Global Warmin g” Nigel Lawson, Duckworth Overlook 2008 ISBN 978-0-7156-378 6-9 “Unstoppable Global Warming – Every 1,500 Years” S Fred Singer & Dennis T Avery, Rowman & Littlefield Publi shers, Inc 2007 ISBN 978-0-7425-5116-9 “The Deniers” Lawrence Solomon, Richard Vigilante B ooks 2008 ISBN 978-0-9800763-1-8 “Cool It – The Skeptical Environmentalist’s Guide t o Global Warming” Bjorn Lomborg Marshal Cavendish Ltd 2007 ISBN 978-0-462-09912-5 “Climate Confusion” Roy W Spencer, Encounter Books 2008 ISBN 978-1-59403-210-3 “The Politically Incorrect Guide to Global Warming and Environmentalism” Christopher C. Horner, Regnery Publishing, Inc. 2007 ISBN 978-1-59698-501-8 “Scared to Death” Christopher Booker & Richard Nort h, Continuum Books 2007 ISBN 0-8264-8614-2; 978-0-8264 -8614-1 All the above are available from Amazon 28