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 Permafrost Permafrost (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 its influence on regional energy and water exchanges, greenhouse gas fluxes and carbon budgets – and hence plays an important role in the global climate system. B. Heim 1 , K. Klehmet 2 , A. Bartsch 3 , K. Elger 1 , J. Boike 1A , F. Günther 1 , H. Lantuit 1 , B. Rockel 2 , M. Langer 1A , S. Muster 1A , A. Morgenstern 1 , K. Piel 1A , J. Sobiech 1 , U. Herzschuh 1 , H.-W. Hubberten 1 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 Permafrost initiated 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, Z 0 , 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 Lena River Delta Central Yaktuian Lake districts to provide a consistent meteorological data set at high spatial- and temporal resolution Orange = >10% rockland Red = 80-90 % rockland Pink = 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 Circumpolar Soils Map (Tarnocai et al. 2002) Global Lake Data Set (Kourzeneva, 2010) 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 future ? 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 & ponds but: model LUT definition for tundra: sparce vegetation, 50% barren! GTN-P site Yubileynoe (RU) GTN-P site Nadym (RU) Comparison Tair versus LST R 2 = 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 Aug sep Oct Nov Dec Jan Feb Mar Apr May Jun 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 1A young Investigator 2 3 Muster et al. (2010) GLC2000, ECOCLIMAP lake status (2007, 2008, 2009, 2010) after Romanovsky in Los Angeles Times