Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Local validation of numerical experiments with the COSMO-EU G. Vogel and J. Helmert

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Model experiments with COSMO-EU EXP CE 6795 exponential depletion of root density with depth groundwater coupling bare soil evaporation (Noilhan & Planton, 1989) run without soil moisture analysis (SMA) EXP CE 7224 modified aerosol loading + SEAWIFS-based plcv and LAI areal pattern of minimum stomatal resistance (crsmin) groundwater coupling + modified rooting density profile + SMA EXP CE 7533 modified aerosol loading + SEAWIFS-based plcv and LAI areal pattern of halved minimum stomatal resistance (crsmin) groundwater coupling + modified rooting density profile + SMA Local validation of results at Falkenberg, Payerne and Toulouse (March - May 2009) (June 2009)

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 All meteorological conditions

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Impact of plant cover and rooting depth on temporal variation of soil moisture

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 standard parameterisation modification

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Impact of plant cover and rooting depth on temporal variation of soil moisture

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Falkenberg 2009

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Impact of plant cover and rooting depth on soil moisture development during spring 2009

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010

Richard equation for water transfer Variants of the lower boundary conditions (rigid lid, standard drainage and complete groundwater coupling) should be considered in the D-Term Transfer functions according to Rijtema (1969)

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010

0cm - 9cm sand 9cm – 27cm loam no vegetation standard drainage Forcing data taken from Falkenberg 2003

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Conclusions The TERRA module simulates the soil moisture decrease during spring reasonably well if the local vegetation properties are realistically prescri- bed. Crucial vegetation parameters are the rooting density and depth as well as the minimum stomatal resistance. If satellite-based values are used, the rooting depth should also be made consistent to them in the annual cycle. The TERRA module is likewise able to simulate the water transfer under inhomogeneous soil conditions after some modifications of the transfer scheme.

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Thank you for your attention

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 D:\IDL\Moscow\sm_FKB_MAM2009.jpg

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Falkenberg 2009

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Falkenberg 2009

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010

*0.58*2.00

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Accumulated evapotranspiration Bowen-ratio (9-15 UTC)

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 rootdp_min = 0.12m (or e.g. half of maximum value) rootdp_max= 0.60 m (see look-up table) plcov SEAWIFS current plant cover value from SEAWIFS plcv_min SEAWIFS minimum plant cover from SEAWIFS in the annual cycle Plcv_avg SEAWIFS averaged maximum plant cover from SEAWIFS values (June – August) Adaption of rooting depth to SEAWIFS-based plant cover in the annual cycle

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 bv dv ev rv quadratic interpolation Maximum values (plcov, lai, rootdp) Minimum values (plcov, lai, rootdp) annual cycle Parametrisierung des Jahresgangs jd: Julian day hsurf: height above sea level bv: start of season (2009: 85) dv: vegetation developed (2009: 115) rv: veg. begins to „redevelop“ (2009: 215) ev: end of season (2009: 238) bv,dv = functions of latitude jd=1,365

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September 2010 Toulouse Payerne Falkenberg 22.8 M% clay 32.0 M% sand 26 M% clay, 74 M% sand 40 M% clay, 60 M% sand m m m m m Sl3 Slu field capacity 26 V% pore volume 37 V% field capacity 28 V% pore volume 36 V% field capacity 24 V% pore volume 34 V% wilting point 11 V% 0 – 1.00m preliminary

Lindenberg Meteorological Observatory – Richard Aßmann Observatory COSMO GM Moscow September cm - 9cm sand 9cm – 27cm loam no vegetation standard drainage Forcing data taken from Falkenberg 2003