application of geoinformatics in forestry · wildfires of siberia under climate change the current...
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11TH Session of the Winter Forest School
«Application of geoinformatics in forestry»
Forest Research Institute, Sękocin Stary, 12-14 March 2019
Remote sensing
in monitoring wildfires in Siberia
Evgenii Ponomarev
Federal Research Center «Krasnoyarsk Science Center SB RAS»V.N. Sukachev Institute of Forest, SB RAS
Siberian Federal UniversityKrasnoyarsk, Russia
____________________________________________________________________________________________________
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Actualities
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I.Wildfire impact is the main natural disturbances in forests of Russia and mostly in Siberian boreal zone.
In Siberia the annual area burned makes up to 17 million ha.
The increasing trend of forest burning is evaluated over recent years. (Conard et al. 2002; Soja et al. 2004; de Groot et al., 2013; Ponomarev, Kharuk, Ranson, 2016).
II.
There are 4 zones of forest fire monitoring in Russia today.
According to them more than 50% of forests in Russia is under remote monitoring only. Satellite imagery and remote sensing estimations are the only available data on
wildfire activity there.
Satellite monitoring allows to obtain real-time data on forest fires and provides with attributive information on all detected active burnings and their daily dynamics.
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
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Territory zoning in terms of wildfire monitoring and preventing
A) Levels of Natural fire danger
I – ground-based fire monitoring (7%),
II – aerial monitoring (42%),
III – satellite monitoring and selective fire extinguishing (20%),
IV – satellite monitoring and fire extinguishing in cases of settlement threats (31%)
V – protected areas (State reserves, National parks etc.)
A
C) Percentage of forest cover
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
B
B) Anthropogenic impact levels D) Types of preventing monitoring
C
D
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Tasks for the system of remote fire monitoring
Fire Weather condition analysis and weather fire danger estimation;
Thermal anomalies detecting and wildfire attributive data collecting;
Real-time mapping of fire activity and dynamics.
Long-term wildfire database preprocessing and uploading in GIS;
Geospatial analysis of wildfire, current trends and prognoses;
Assessment of fire impact on the scale of ecosystems / post-fire forest monitoring;
Direct carbon emissions estimating.
Daily
real-time
monitoring
Analysis
of fire ecology
and post-fire
effects
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
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11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
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Remote sensing data on wildfires in Russian Federal agencies
«Kaskad» (Cascade)
Emergency Situations Monitoring agency-level portal of EMERCOMof Russia
Supported since 2009 by the Regional department in Krasnoyarsk
Reduced version is available at: http://space.akadem.ru/int/
«ISDM - Rosleskhoz»
Remote Monitoring Information Systemof Federal Forestry Agency
Available at: http://public.aviales.ru/main_pages/public.shtml
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Estimating the wildfire energy characteristics, intensity of burning, crown burning
Monitoring data on wildfires for science
Spatio-temporal characteristics of wildfire frequency (fire weather, heat and moisture supply, natural fire danger)
Post-fire effects monitoring and prognosing (thermal anomalies, impact on thawing depth of the seasonal thawed layer, forest mortality/recovery)
1
2
3
4
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
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GIS of Wildfire monitoring
V.N. Sukachev Institute of Forest, Siberian Branch of Russian Academy of Sciences
Available for 1996 – 2018
Daily information for every wildfire is available as GIS layer also.
The database contains over 2104 records per year and ~5106 in total for 24 years.
The main topics
Instrumental assessment of direct fire emissions of carbon based on real-time satellite data
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II
I
III
Area of interestAgreement between The Global Fire Monitoring Center and
Sukachev Institute of Forest, 2017
IV
E u r a s i a
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
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Central Siberia, Yenisey transect
AOI of Regional Eurasia Fire Monitoring Center /The Global Fire Monitoring Center
South Siberia Altai-Sayan Region
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Satellite imagery for wildfires monitoring
Terra/MODIS2017
Active burning and post-fire pattern
Sentinel-22016
Landsat-8/OLI2017
AQUA/Modis SNPP/VIIRS
Raw data on thermal anomalies/burned areasAWildfire database in GISС
Pre-processing
B
D Analysis
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GIS layer of long-term history of wildfires
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Data pre-processing in GIS
- final fire polygon aggregating;- polygons of area burned re-calculating;- total fire scar area validating;- additional attributive information (region, forestry, forest type, nearest settlements etc.)
Probability of active burning detecting vs the area and target temperature
%
Active zone area, m2
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0
200
400
600
800
1000
1200
1400
12 14 15 16 18 19 20 22Category of area
Num
ber
of fire
s
Categories of fires in terms of size:
(1) Wildfires up to 1000 ha;(2) «short-lived» objects/ agricultural burning;(3) large-scale wildfires
Categories of Wildfires in database
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0
100
200
300
400
500
600
12 14 15 16 18 19 20 22
Категории
Количест
во п
ож
аров
а)
0
50
100
150
200
250
300
350
400
12 14 15 16 17 18 19 21 22
площадей
б)
A histogram of data on forest fire events: a) taking into account all detected thermal
anomalies, b) after the exclusion of «short-living»
objects registered during the spring
0
5
10
15
20
25
1996 2000 2004 2008 2012 2016
Год пожароопасного сезона
Числ
о п
ож
аров,
тыс.
1 2 3
а)
0
5
10
15
20
25
1996 2000 2004 2008 2012 2016
Год пожароопасного сезона
Общ
ая п
лощ
адь,
млн г
а 1 2 3
б)
Wildfire numbers, ths
Total area, MHa
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Fire Radiative Power / burning intensity estimations
100
1000
10000
100000
1 5 9 1317 21 2529 3337 4145 49 53
Number of fire observation
FR
P, M
W
1
2
Fire radiative power dynamics
To estimate the heat radiation power from the zone of active burning the Terra/MODIS data in the range of 4 mkm / standard product MOD14 were employed(Kaufman et al., 1998; Justice et al., 2002).
The method was adapted for burning conditions in Siberia;The threshold technique was implemented to classify fires in term of burning intensity: low-, medium- and high-intensity including crown burning (probability ~60%).
The characteristics strongly correlated with a burnup rate and fire front velocity (initial data for modelling of scenario of a wildfire).
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Extreme and crown wildfires in Siberia
Sporadic peaks of FRP corresponded to the extreme
burning phase
100
1000
10000
100000
1 8 15 22 29 36 43 50 57 64 71 78
Number of fire observation
FR
P, M
W
1
2
Annually extreme intencity burning zones were classifyed presented up to 10-13% of total area of Siberian wildfires.
Averaged estimation for crown burning is 5.51.2% of the total fire number, that is about 8.5% of total area burned annually.
FRP maxima
Thermal anomalies from the Terra/MODIS imagery of an active burning
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
Pixel and sub-pixel re-analysis1-km resolution image
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Remote system for fire monitoring is the main source of data for analysis and forecasting of fire impact at the scale of ecosystems of Siberian forests and globally while the quota (contribution) of forest burning in Eurasia is strongly significant.
Wildfires of Siberia under climate change
The current dynamics of fire regimes in Siberia is determined by a complex of factors, such as temperature anomalies, change and redistribution of precipitation.
The first decade of the 21st century is characterized by an increase in frequency of fires and burned areas.
According to forecasts in the 21st century, direct wildfire emissions of carbon under current trend can rise from 120-140 Tg at present (Shvidenko et al., 2011) up to 230-240 Tg per year (Zamolodchikov et al., 2011).
4
5
6
7
8
9
10
11
1900 1920 1940 1960 1980 2000 2020
Tem
pera
ture
anom
aly
, °С
1901 - 1990
1990 - 2013
I
II
a)
-0,7
-0,2
0,3
0,8
1900 1920 1940 1960 1980 2000 2020
SP
EI
b)
Long-term trends for temperature and The Standardised
Precipitation-Evapotranspiration Index for Siberia
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Heat and moisture supply (top) trends vs RBA (bottom)
Long-term averaged relative burned area (RBA) per year, %
Wildfires vs meteorological anomalies and climate trends
Relative burned area per year is in the range of 0.1% — 14.5%Averaged for Siberia — 1.19%, for western Canada — 0.56% (deGroot et al., 2013).
Fire season scenario
P{E} (min–max)Period, yeas
RBA, %(Min–Max)
I extreme 0.18–0.20 8 ± 3 4.5–14.5
IIa moderate/spring
0.24–0.57 4 ± 1 0.5–1.5
IIb moderate/summer
0.24–0.38 3 ± 1 1.0–4.0
III low 0.19–0.48 4 ± 2 0.01–0.3
Angara Evenkiya Yakutia
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Assessment of fire impact and monitoring of post-fire changes could provide "traditional" methods for analyzing vegetation indices, as Normalized Difference Vegetation Index (NDVI);Normalized Burned Ratio differencing (dNBR) etc.
The real time classifying can be produced using the FRPtechnique data.
The approach can be used for estimating the initial fire impact and for the furtherprognosing of the post-fire vegetation cover state.
Vegetation cover classification for the post-fire scar:a) initial Landsat imageb) uncontrolled classificationc) NDVI classifyingd) dNBR classifying
e) Real-time classification using Fire Radiative Power data / intencity estimates
Fire impact classifying
a b c
d e
Fire impact “severity”
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Post-fire effect monitoring
1-2 year
15 year
24 year
Larch forest recovery process monitoring (Evenkiya, Siberia)
Year after
the burning
NDVI
relative, %
Absolute temperature anomaly, °C
T
relative, %
1 53.510.7 6.57.2 47
5 21.07.8 3.84.9 30
10 9.05.0 3.44.6 20
Averaged characteristics of thermal and vegetation anomalies for Larch forests of permafrost zone
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
y2 = 41,7e– 0,08x
R2 = 0,81
y1 = 57,6e– 0,2x
R2 = 0,98
0
20
40
60
0 5 10Период после пожара
Ан
ом
ал
ия
ND
VI
отн ,
% .
0
10
20
30
40
50
Ан
ом
ал
ия
Tо
тн ,
% .
1
2
0
5
10
15
20
0,0 0,2 0,4 0,6Аномалия NDVIотн
Z,
%
1 2 3
r = 0,7
15/21
Modeling the fire impact
Z, % - estimations of depth of the seasonal thawed layer
rate of loss fromthermal anomalies
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Fire intensity for emission calculating
The ratio of fire areas in terms of intensity
Fractiles of intensity:
I) < FRPmean–σ, II) от FRP mean–σ до FRP mean+σ,
III) > FRP mean +σ
σ - is standard deviation
The power of heat radiation is linearly related to the amount of burnt biomass (Wooster et al., 2002).
Fire Radiative Power data are the initial information for calculating the amount of emissions during different stages of each wildfire.
11.72
44.6043.67
0
25
50
75
I II IIIКвантиль FRP/Интенсивность
До
ля п
ло
ща
ди
, %
.
б)
11.68
46.0442.28
0
25
50
75
I II III
Пл
ощ
ад
ь,
% .
а)
43.64 42.92
13.44
0
25
50
75
I II III
До
ля п
ло
ща
ди
, %
.
г)
/FRP
10.94
41.74
47.32
0
25
50
75
I II III
Пл
ощ
ад
ь,
% .
в)
Квантиль интенсивности
Larch Pine
Dark Decid. /Mixed
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Fire classifying for the territory of Siberia
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Variation of the registered radiation power (FRP) in relation to fire parameters in model equations
Wildfire area (m2)
Combustion completeness ()
Fuel load (kg/m2)
Burned biomass (Seiler, Crutzen, 1980 )
Wildfire polygon classification / intensity category
Adopted estimations of burned amount of fuels (kg);Adopted method for direct carbon emission estimates (Tg С/year)
Evaluation of wildfire emissions
StandS, mlnha peryear
“Standard” season
Extreme season
% of emission
(min–max)
TgС/year
t С/ha
Tg С/year
t С/ha
Larch 2.765 42.9 15.5 52.0 18.8 51.6–62.4
Pine 0.656 11.0 16.7 11.8 18.0 13.2–14.2
Dark coniferous
0.153 1.9 20.4 3.1 20.4 2.3–3.7
Decidious/mixed
0.275 3.8 13.7 4.717.2
44.5–5.7
а) FRP vs burnup rate (kg/m2sec) for different sub-pixel active burning area: 1) 1000 m2, 2) 500 m2, 3) 250 m2;
b) FRP vs fire front velocity and fuel load(kg/m2): 1) for 1.5 kg/m2 and β = 0.55, 2) for1.5 kg/m2 and β = 0.4, 3) for 2.5 kg/m2 and β = 0.55, 4) for 0.7 kg/m2 and β = 0.4
0
50
100
150
200
0 0,05 0,1Front velocity, m/sec
FR
P,
МВ
т
1 2
3 4
b)
0
50
100
150
200
0 0,05 0,1 0,15
Burnup rate, kg/m2sec
FR
P,
MW
1
2
3
a)
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Direct emission 83 ± 21 Tg С/year is less in comparison with assessment for Siberia 112 ± 25 Tg С/year, according to standard method (Soja et al., 2004).
Emission values per year vary from minima 20–40 Tg С/year (during 2004, 2005, 2007, 2009, 2010) up to 230 Tg С/year during extreme fire season of 2012.
The total emission statistics includes 33–37%, 47–49% and 14–17% from wildfires oflow-, moderate- and high intensity in terms of FRP. And specific emission values were8.7, 12.0 and 15.4 tons С/ha correspondingly.
Method
Burned biomass (М) Direct emissions (C) Mrel и Сrel
1012 kg σε
for
α= 0.1
Tg С / year
σ ε % σε
for α=
0.1
“Standard”
(Seiler, Crutzen,
1980 )
0.192 0.131 0.067 111.9 68.4 25.4
17.3 1.6 0.8Standart+
FRP
classification
of fires
0.159 0.108 0.055 83.1 56.5 21.0
Long-term emission estimates
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Trend of the direct fire emissions in Siberia
Variations of direct carbon emissions from Siberian fires in the time interval 2002-2016:
a) trend based on the multi-year series (p <0.05); b) In relation with air temperature anomaliesfor Siberia
The updated estimates of direct fire emissions in Siberia during 2002–2016 were 83 ± 21 Tg C/year in average. Current linear trend (R2=0.56) was evaluated for the last 15 years.
A trend of significant increase in direct fire emissions is observed. According to the trend fire emissions in Siberia at the end of 21 century will rise up to 220, 700 and 2300 Tg C/year in RCP2.6, RCP4.0 and RCP8.5 scenarios, correspondingly.
1
2
R2 = 0.56
0
100
200
2002 2006 2010 2014
Year
С,
Tg/year
a)
y = 32.7exp(0.59x)
r = 0.51
10
100
1000
0,0 0,5 1,0 1,5 2,0 2,5Temperature anomaly, °С
b)
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Conclusion
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
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Satellite data and GIS technology is the important part of fire preventing and monitoring system for Siberia.
Real-time data on forest fires is available for different agency including the Federal forest service, EMERCOM and fire ecology science as well.
Precise database of wildfires in Siberia is available for 1996 – 2018 in GIS layer format. And number of technologies for fire characteristics assessment were adapted to the conditions of burning in boreal forests of Siberia at present time.
Remote system for fire monitoring is the main source of data for analysis and forecasting of fire impact at the scale of ecosystems of Siberian forests and globally since the assessment of forest burning in Eurasia is strongly significant.
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Publications
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
Ponomarev E.I., Kharuk V.I. (2016) Wildfire Occurrence in Forests of the Altai–Sayan Regionunder Current Climate Changes // Contemporary Problems of Ecology. 2016. Vol. 9. № 1. P.29–36. DOI: 10.1134/S199542551601011X
Kharuk V.I., Ponomarev E.I. (2017) Spatiotemporal Characteristics of Wildfire Frequency andRelative Area Burned in Larch-dominated Forests of Central Siberia // Russian Journal ofEcology. Vol. 48, No 6, p. 507–512. DOI: 10.1134/S1067413617060042
Ponomarev E.I., Skorobogatova A.S., Ponomareva T.V. (2018) Wildfire Occurrence in Siberiaand Seasonal Variations in Heat and Moisture Supply // Russian Meteorology and Hydrology.Vol. 43, No. 7, p. 456–463. DOI: 10.3103/S1068373918070051.
Ponomarev E.I., Shvetsov E.G., Kharuk V.I. (2018) Intensity of wildfires for direct fire emissionsestimating // Russian J. Ecology. Vol. 49. №6. P. 492–499. DOI: 10.1134/S1067413618060097
Ponomarev E.I., Shvetsov E.G., Litvintsev K.Y., Bezkorovaynaya I.N., Ponomareva T.V.,Klimchenko A.V., Ponomarev O.I., Yakimov N.D., Panov A.V. (2018) Remote Sensing Data forCalibrated Assessment of Wildfire Emissions in Siberian Forests // Proceedings. 2018. Vol.2. №7 (348). 7 p. DOI: 10.3390/ecrs-2-05161.
Ponomarev E.I., Ivanov V.A., Korshunov N.A. (2014) System of Wildfire Monitoring inRussia (pp.187 - 205). In: D.Paton and J.F. Shroder (ed.) Wildfire Hazard, Risks andDisasters. Elsevier, 2015. – 284 p. ISBN: 978-0-12-410434-1. DOI: 10.1016/B978-0-12-410434-1.00010-5
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Thank you!
11TH Session of the Winter Forest School «Application of geoinformatics in forestry» Forest Research Institute, Sękocin Stary, 12-14 March 2019
Remote sensing
in monitoring wildfires in Siberia
Evgenii Ponomarev
Federal Research Center «Krasnoyarsk Science Center SB RAS»
V.N. Sukachev Institute of Forest, SB RAS
Siberian Federal University
Krasnoyarsk, Russia