Post on 12-Apr-2020
1
Helmholtz Climate Initiative
Regional Climate Change
Evaluation of Permafrost Remote Sensing Products and Background Parameterization for Models
T3.2 Northern High Latitudes - Permafrost
www.reklim.de
Terrestrial PermafrostPermafrost (defined as ground below or at 0°C for at least 2 years)has been identified as one of six indicators of global climate change(World Meteorological Observation, WMO).
Permafrost is a key component of the cryosphere through itsinfluence on regional energy and water exchanges, greenhousegas fluxes and carbon budgets – and hence plays an important rolein the global climate system.
B. Heim1, K. Klehmet2, A. Bartsch3, K. Elger1, J. Boike1A, F. Günther1, H. Lantuit1, B. Rockel2, M. Langer1A, S. Muster1A, A. Morgenstern1, K. Piel1A, J. Sobiech1, U. Herzschuh1, H.-W. Hubberten1
The high-latitude ecosystems play a strong role in the climate system.
Operational Remote Sensing Observations
AWI / HGF-SPARC: Samoylov (RU), Svalbard (NO), Polar Bear Pass (CA)
Evaluation
Introduction
GTN-P Global terrestrial Network of Permafrostinitiated by the IPA, authorized under GCOS
Using Circum-Arctic Ground Observations
Regional-Scale Instruments
Regional Climate Modelling
Lena River catchment
COSMO-CLM (model of the Consortium for Small-scale Modelling in CLimate Mode)
global and regional input-datasets (land cover, soils) [outside model]
external background parameters (albedo, fraction vegetation, LAI, Z0, thermal emissivity)
[outside model/ modelled]
output parameters (soil moisture, frozen/ thawed state, temperature) [modelled]
Evaluation of
(Günther et al., 2011)
lake status (2001 & 2009)
1
(Morgenstern et al., 2011)lake status (2000/ 2001)
default: 10 m depth
rivers, 3 m depth
2
1
4
3
no inland water
referenced lake depth
LenaRiver Delta
Central YaktuianLake districts
to provide a consistentmeteorological data set athigh spatial- and temporalresolution
Orange = >10% rocklandRed = 80-90 % rocklandPink = 100 % rockland
Langer et al. (2010)Westermann et al. (2011)
In RSE
Evaluation of Background-Data for Modelling
Ongoing New regional to circum-arctic thematic background data: soils/rock, water bodies, wetlands, peatland
Adaptation of pre-processing for models for permafrost regions
Northern C
ircumpolar S
oils Map (Tarnocai et al. 2002)
Glo
bal L
ake
Dat
a S
et
(Kou
rzen
eva,
201
0)
First Results:
water
land cover
subground
German-Russian long-term measurement field Samoylov (RU). AWI / HGF-SPARC
Soil background-data from the FAO (1971-1981): contain no ‚rock‘ in mountain regions
futu
re ?
present
Global warming is most pronounced in high-latitudes.
Water (23 %) Wet (47 %)Dry (30 %)
AWI / HGF-SPARC: Samoylov (RU),VNIR aerial surface classification
tundra: 100% vegetation cover & wetlands & pondsbut: model LUT definition for tundra: sparce vegetation,
50% barren!
GTN-P site Yubileynoe (RU)
GTN-P site Nadym (RU)
Comparison Tair versus LST
R2 = 0,9686
‐60
‐50
‐40
‐30
‐20
‐10
0
10
20
30
‐60 ‐50 ‐40 ‐30 ‐20 ‐10 0 10 20 30 40
Monthly Bias (Tair ‐ LST)
0
50
100
150
200
250
2009‐2010 Au
gsep
Oct
Nov
Dec
Jan
Feb
Mar Ap
rMay Ju
n Jul
Number of Value
‐6,00
‐5,00
‐4,00
‐3,00
‐2,00
‐1,00
0,00
1,00
2,00
3,00
Temperature (°C)
Nb of Values Nb of Night Nb of Day Bias
1Ayoung
Investigator
2
3
Muster et al. (2010)
GLC
2000
, E
CO
CLI
MA
P
lake status (2007, 2008, 2009, 2010)
after Romanovsky in Los Angeles Times