Community

Activities and Plans

A.Will (BTU Cottbus) and the CLM-Community

Intended use of the Climate modeSimulation of climate change in different regions of the world.Quantification and reduction of ucertainties of climate change (IPCC 2001/2006)Relevance for GCMs

Analysis of the relevance of nonhydrostatic effects local phenomena and of microphysics for climate dynamics.

Relevance for NWP

detection of model deficiencies not visible on small time scales

Independent evaluation without influence of initial conditions and data assimilation

(1) different model versions for NWP and RCM (2) Climate mode not overall tested.

9.2006: 41 Members9.2007: 55 Members

Aims of the CLM Community

Further development of the COSMO-CLM to be a regional earth system model

Quantification and Reduction of Model Uncertainties

Efficient Use of Computational Ressources

Preparation and Conduction of Consortial Scenario Runs

CLM Model system Features of int2lm_2 PreprocessorMain Projects in the last year

PrEProcessor (PEP) for External Fields(a)Unified Preprocessor int2lm2(a)Veg3D fully coupled with COSMO-CLM_4aBasic Sensitivity Studies (a)Consortial runs successfully finished aCoupling with Com. Land Model (CLM)Improvements of TERRA_MLAerosol-Cloud InteractionStandard Postprocessor

PrEProcessor (PEP) for external fields

PrEProcessor (PEP) for external fields

int2clm +int2lmInt2lm2Interpolation to LM/CLM grid

1. Implementation of soil-vegetation model VEG3DCathrine Meiner and Gerd Schdler, University / Research Center KarlsruheVEG3D is fully coupled with CLM version 4.0 and is being evaluatedMain differences between TERRA_LM and VEG3D:Standard soil model of CLM (TERRA_LM) uses the surface temperature for transpiration calculation VEG3D has an explicit vegetation layer (big leaf concept) and simulates a vegetation temperature Runoff from soil layers is organized differently in both modelsDifferent formulation of water transport in soil and snow treatmentAdditional parameters:Land use => taken from the PEPSoil parameters => additional file in CLM codeFirst results:Annual evapotranspiration sum more homogenous in VEG3D which agrees better with measurements (figures)Influence on annual preciptation in the range of 100 200 mmOBSERVATIONS TERRA_MLVeg3D mmDeveloped by the CLM-Communityin cooperation with the German weather service

BSS: Small Disturbance of Boundary Conditions Once in a Month

DIFF:TOT_PREC, STDDIFF: T_2m, STD7.1981JJA 198119811979-1981slope:-0.46slope:-0.4TOT_PREC

WL-Ref: yearly averageQSQLHEBSS: TERRA_ML Sensitivity (Alexander Block)

Consortial Runs with CLMConfiguration256x271x32 Gridpointsx = y = 0.165 degECHAM5 bound. cond.CLM3.0 +int2lm1Model runs:C20_1 1960-2000C20_2 1960-2000C20_3 1960-2000

A1B_1 2001-2100A1B_2 2001-2100B1_1 2001-2100B1_2 2001-2100andCLM050 1979-2000 with ERA40 BC

Presentation of Results: HH 7 Dec. 2007

Applications Quality Control consortial runsRegions:level 1

Regions:level 2Applications Quality Control consortial runs

Regions:level 3Applications Quality Control consortial runs

Com1: Quantification of Model UncertaintiesPrecipitation, climate mean 79-98

Com1: TOT_PREC, CLM3-GPCCApplications Climatological Evaluation of CLM, 79-93 Model Evaluation

Com1: TOT_PREC, CLM3-DWD

Applications Climatological Evaluation of CLM, 79-93 Model Evaluation

Com1: T_2m, CLM-CRU

Com1: T_2m CLM-CRU005JanuaryJuly

Com1: T_2m CLM3-DWD

Applications Climatological Evaluation of CLM, 79-93 Model Evaluation

Com2: C20_1 Observations,61-90TOT_PRECT_2m

ApplicationsQuality Controlconsortial runs

Com3: A1B_1 (2031-2060) - C20_1 (1961-1990)TOT_PRECT_2m

Applications Quality Controlconsortial runs

Com3:A1B_1 (2031-2060) C20_1 (1961-1990)

TOT_PREC

14

710

Com3:A1B_1 (2031-2060) C20_1 (1961-1990)

T_2m

14

710

Ongoing Activities in ModellingImplementation of soil-vegetation model VEG3D ,Cathrine Meiner and Gerd Schdler, IMK-TRO Karlsruhe

2. Coupling of the soil-vegetation Community Land Model (CLM), Reto Stckli and Sonia Seneviratne, ETH

The documentation of the Community Land Model can be found on the homepagehttp://www.cgd.ucar.edu/tss/clm/. The model is used in the Community Climate System Model (CCSM).

3. 1. Aerosol-Cloud coupling and Atmospheric Chemistry, S.Metzger (MPIfC Mainz)3. 2. Fast atmospheric chemistry solversE.Schaller (BTU Cottbus)

4. Implementation of the dynamical NEMO ocean model for the mediterranean H.Hbener, U.Ulbrich (FU Berlin), S.Legutke und I.Fast (Model and Data, Hamburg), A.Will (BTU Cottbus) 5. Publication of a special issue CLM in Meteorologische Zeitschrift in 4.2008

The CLM-Community is interested to cooperate with the COSMO membersSuggestions:joint model verification/evaluation in RCM and in NWP mode in different regions in Europe

climatological data on a regular grid

Links between the web-pages, similar structure

Invitation of one member of COSMO to workshops

thank you ! www.clm-community.eu

Community Land Model

http://www.cgd.ucar.edu/tss/clm/ community model used in Community Climate System Model (CCSM)

Modules: Biogeophysics River routing Carbon cycle (plant physiology) Vegetation dynamics C/N model (nutrients) Dust, VOCs2. Coupling of Climate Local Model and Community Land ModelReto Stckli, Sonia Seneviratne, ETH Zurich

Was ist bei Simulationseinstellungen gemeint?