TY - GEN
AU - Gianpaolo Balsamo
AU - Emanuel Dutra
AU - V.M. Stepanenko
AU - P. Viterbo
AU - P.M. Miranda
AU - D. Mironov
AB - Modelling lakes in Numerical Weather Prediction (NWP) is important to produce accurate evaporation rates and surface temperature forecasts. Lake depth is a crucial external parameter for the implementation of lake models into NWP systems, since it controls the dynamical range of lake temperature amplitudes on diurnal to seasonal time scales. However, a global lake-depth dataset does not exist at present. A novel method to derive an effective lake depth on the basis of the remotely-sensed lake water-surface temperature (LWST) is presented. A technique is proposed to adjust a simple two-layer Fresh-water Lake model (FLake) depth such that simulated annual cycle of LWST matches satellite-based LWST climatology as closely as possible. The method is applied to 47 European lakes and the results show convergence of the solution. Merits and limitations of this approach are discussed. Preliminary validation of a derived bathymetry of the American Great Lakes is presented.
BT - ECMWF Technical Memoranda
DA - 12/2009
DO - 10.21957/be525ccu
LA - eng
M1 - 609
N2 - Modelling lakes in Numerical Weather Prediction (NWP) is important to produce accurate evaporation rates and surface temperature forecasts. Lake depth is a crucial external parameter for the implementation of lake models into NWP systems, since it controls the dynamical range of lake temperature amplitudes on diurnal to seasonal time scales. However, a global lake-depth dataset does not exist at present. A novel method to derive an effective lake depth on the basis of the remotely-sensed lake water-surface temperature (LWST) is presented. A technique is proposed to adjust a simple two-layer Fresh-water Lake model (FLake) depth such that simulated annual cycle of LWST matches satellite-based LWST climatology as closely as possible. The method is applied to 47 European lakes and the results show convergence of the solution. Merits and limitations of this approach are discussed. Preliminary validation of a derived bathymetry of the American Great Lakes is presented.
PB - ECMWF
PY - 2009
EP - 16
T2 - ECMWF Technical Memoranda
TI - Deriving an effective lake depth from satellite lake surface temperature data: A feasibility study with MODIS data
UR - https://www.ecmwf.int/node/7923
ER -