Surface Emissivity Modeling - University of WisconsinâMadison

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Sea Ice Microwave Emissivity Spectra Sea Ice V-POL Emissivity Spectra Sea Ice H-POL Emissivity Spectra Emissivity 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0 20 40 60 80 100 120 140 160 Frequency (GHz) RS_ Ice (A) RS_Ice (B) New Ice + Snow Bare New Ice Broken Ice First Year Ice Composite Pack Ice RS_Ice (C) Fast Ice RS_Ice (D) RS_Ice (E) RS_Ice (F) Grease Ice Emissivity 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0 20 40 60 80 100 120 140 160 Frequency (GHz) RS_ Ice (A) RS_Ice (B) New Ice + Snow Bare New Ice Broken Ice First Year Ice Composite Pack Ice RS_Ice (C) Fast Ice RS_Ice (D) RS_Ice (E) RS_Ice (F) Grease Ice
Advanced Snow Emissivity Models All Seasons LSMEM (Drusch et al., 2001, 2004; Gao et al., 2004) • Calculates microwave emission from a surface partially covered with vegetation and/or snow • Snow component based on the semi-empirical HUT emission model • Treats snowpack as a single homogeneous layer • Dielectric constants of ice and snow calculated from different optional models • Inputs include snow depth, density, temperature, grain size and ground temperature DMRT (Tsang et al, 2000) • Calculates Tb from a densely packed medium • A quasi-crystalline approximation is used to calculate absorption characteristics with particles allowed to form clusters • The distorted Born approximation is used to calculate the scattering coefficients • Inputs include snow depth, snow temperature, fractional volume and grain size MEMLS (Matzler, 1998) • Calculates Tb from a multi-layer snow medium • The absorption coefficient is derived from snow density, frequency and temperature • The scattering depens on snow density, frequency and correlation length • Inputs include snow depth, temperature,density, ground temperature and correlation length • So far successfully validated only for dry snow conditions
Page 1 and 2: Advances in Radiative Transfer Mode
Page 3 and 4: CRTM Capability Supported Instrumen
Page 5 and 6: Fast Radiative Transfer Schemes •
Page 7 and 8: Aerosols Scattering Model 1. Sulfur
Page 9 and 10: Aerosol Effects on HIRS Channels We
Page 11 and 12: Stand-alone AIRS Radiative Transfer
Page 13 and 14: Fast Zeeman Absorption Model (1) At
Page 15 and 16: Community Surface Emissivity Model
Page 17: Snow Microwave Emissivity Spectra S
Page 21 and 22: IR and MW Emissivity Relationship M
Page 23 and 24: Direct SSMIS Cloudy Radiance Assimi
Page 25: International TOVS Study Conference

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Surface Emissivity Modeling - University of WisconsinâMadison