Modified CRTM Nonspherical Particles and Preliminary Data Assimilation
- Slides: 31
Modified CRTM: Non-spherical Particles and Preliminary Data Assimilation Experiments Research Group Meeting 12 December 2016 Scott Sieron Advisors: Fuqing Zhang, Eugene Clothiaux Major Collaborator: Lu Yinghui
Satellite Beam Convolution Better matching how the satellite observes, instead of how the weather model domain is setup
Brightness Temperature (K) 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz WSM 6 CRTM-DS Goddard Morrison
Brightness Temperature (K) 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz WSM 6 CRTM-DS Goddard Morrison
Non-Spherical Particles
About Non-Spherical Particles • Database from Guosheng Liu (2008 MWR) • Optical properties simulated by Discrete Dipole Approximation (DDA; Draine and Flatau 1994)
About Non-Spherical Particles • Database from Guosheng Liu (2008 MWR) • Optical properties simulated by Discrete Dipole Approximation (DDA; Draine and Flatau 1994)
About Non-Spherical Particles • Database from Guosheng Liu (2008 MWR) • Optical properties simulated by Discrete Dipole Approximation (DDA; Draine and Flatau 1994)
Brightness Temperature (K) CRTM-DS WSM 6, Monodisperse Graupel 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz Sphere Long Column Short Column
Brightness Temperature (K) CRTM-DS WSM 6, Monodisperse Graupel 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz Sphere Block Column Thick Plate
Brightness Temperature (K) CRTM-DS WSM 6, Monodisperse Graupel 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz Sphere Thin Plate 3 -Bullet Rosette
Brightness Temperature (K) CRTM-DS WSM 6, Monodisperse Graupel 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz Sphere 4 -Bullet Rosette 5 -Bullet Rosette
Brightness Temperature (K) CRTM-DS WSM 6, Monodisperse Graupel 80 100 120 140 160 180 200 220 240 260 280 300 SSMIS Obs 37. 0 GHz 91. 66 GHz Sphere 6 -Bullet Rosette Sector Snowflake
First Data Assimilation Experiment
First Data Assimilation Experiment • Real observations at 19. 35 GHz • “Rain-sensitive”: signal (over ocean) in both observations and simulations is dominated by emission of liquid hydrometeors SSMIS Obs WSM 6 Goddard Morrison
First Data Assimilation Experiment • Real observations at 19. 35 GHz • “Rain-sensitive”: signal (over ocean) in both observations and simulations is dominated by emission of liquid hydrometeors SSMIS Obs WSM 6 Goddard 5µm CI Morrison
First Data Assimilation Experiment • Real observations at 19. 35 GHz • “Rain-sensitive”: signal (over ocean) in both observations and simulations is dominated by emission of liquid hydrometeors SSMIS Obs WSM 6 Goddard 5µm CI Morrison
First Data Assimilation Experiment SSMIS Obs Forecast of Analysis Ensemble Mean of CRTM of Ensemble Mean
First Data Assimilation Experiment SSMIS Obs CRTM of Ensemble Mean Stddev of Ensemble Corr. of min. PSFC to Tb
First Data Assimilation Experiment SSMIS Obs CRTM of Ensemble Mean Stddev of Ensemble Corr. of Total Hurricane Precip to Tb
First Data Assimilation Experiment: Not Great SSMIS Obs CRTM of Ensemble Mean Prior CRTM of Ensemble Mean Posterior
Brightness Temperature (K) CRTM-DS WSM 6 80 100 120 140 160 180 200 220 240 260 280 300 19. 35 GHz Obs Fcst. from Prev. En. KF Cycle 37. 0 GHz 91. 66 GHz 183. 31± 7 GHz
Brightness Temperature (K) CRTM-DS WSM 6 80 100 120 140 160 180 200 220 240 260 280 300 19. 35 GHz Obs 37. 0 GHz 91. 66 GHz 183. 31± 7 GHz
Brightness Temperature (K) CRTM-DS WSM 6 Assimilating 19. 35 GHz 80 100 120 140 160 180 200 220 240 260 280 300 19. 35 GHz Obs 37. 0 GHz 91. 66 GHz 183. 31± 7 GHz
Brightness Temperature (K) CRTM-DS WSM 6 Assimilating 19. 35 GHz 80 100 120 140 160 180 200 220 240 260 280 300 19. 35 GHz Obs 37. 0 GHz 91. 66 GHz 183. 31± 7 GHz
CRTM-DS WSM 6 Assimilating 19. 35 GHz Water Path of All Precip Surface Pressure
CRTM-DS WSM 6 Assimilating 19. 35 GHz U wind V wind
Brightness Temperature (K) CRTM-DS WSM 6 Assimilating 91. 66 GHz 80 100 120 140 160 180 200 220 240 260 280 300 19. 35 GHz Obs 37. 0 GHz 91. 66 GHz 183. 31± 7 GHz
Brightness Temperature (K) CRTM-DS WSM 6 Assimilating 91. 66 GHz 80 100 120 140 160 180 200 220 240 260 280 300 19. 35 GHz Obs 37. 0 GHz 91. 66 GHz 183. 31± 7 GHz
CRTM-DS WSM 6 Assimilating 91. 66 GHz Water Path of All Precip Surface Pressure
CRTM-DS WSM 6 Assimilating 91. 66 GHz U wind V wind
