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JCSDA Projects - Community Radiative Transfer Model
Proposal Name:
Further Development and validation of the Community Radiative Transfer Model (CRTM)
Status:
Continued project
Principal Investigators:
- STAR: Yong Han and Fuzhong Weng
- EMC contact: Paul van Dels/John Derber
- GMAO contact: Emily Liu
- NRL contact: Ben Ruston/Nancy Baker
- AFWA contact: Jianjun Xu
Date:
2006 - 2007
Current Achievements:
In the past year, much progress has been made in JCSDA CRTM. Some of the most significant ones are listed below:
- Integration of UMBC SARTA forward transmittance algorithm so as to simulate IASI and AIRS radiance in CRTM.
- Develop CRTM forward aerosol module and make the input interface consistent with the NASA GOCART model being implemented into GFS.
- Extend CRTM forward model to visible and ultraviolet spectrum in order to support GOES-R mission. (Figure 1)
- Validate CRTM under cloudy conditions using CloudSAT/Calipso, which successfully demonstrates the capability of CRTM simulation under cloudy conditions. (Figure 2)
- Complete an RT algorithm to handle upper-level Zeeman splitting effects in SSMIS upper atmosphere sounding channels.
- Extended CRTM to include MetOp-A AVHRR3, HIRS4, AMSU-A and MHS.
Publications:
Yong Han, Paul van Delst, Quanhua Liu, Fuzhong Weng, Banghua Yan, Russ Treadon and John Derber, 2006: JCSDA Community Radiative Transfer Model (CRTM) - Version 1, NOAA Tech Report 122.
Liu, Q., and F. Weng, 2006: Combined Henyey-Greenstein and Rayleigh (HG-Rayleigh) Phase Function, Applied Optics, 45, 7475-7479.
Liu, Q., and F. Weng, 2006: Advanced Doubling-Adding Method for Radiative Transfer in Planetary Atmospheres, J. Atmos. Sci., 63, No. 11.
Liu, Q., and F. Weng, 2006: Detecting Warm Core of Hurricane from the Special Sensor Microwave Imager Sounder, Geophysical Research Letters, 33, L06817.
Y. Han, Q. Liu, F. Weng and P. van Delst, 2006: A Fast Radiative Transfer Model for SSMIS Upper-air Sounding Channels, submitted to J. G. R.
Task Objectives:
In the coming year, CRTM team will be focusing on the following tasks:
- Further development in CRTM aerosol components to include IR sensors
- Extent CRTM to visible spectrum for additional sensors, such as Aqua MODIS, GOES-R ABI, etc.
- Extent CRTM to cover ultraviolet spectrum for additional sensors, such as NOAA10-18 SBUV, NPP OMPS and Aura OMI, etc.
- Evaluate and validate CRTM simulation under various conditions for different sensors by different models and measurements.
- Develop OSS for visible and UV sensors by collaboration with AER, Inc.
- Develop a Line-by-line CRTM (CRTM-LBL) for advanced validation and new sensor study.
- CRTM maintenance, upgrades and documentation update
Figure 1. CRTM simulations of GOES-R visible channels 1, 2, 4 and 5
with profiles including aerosols from GOCART and clouds from GDAS
Figure 2. CRTM simulations of AMSU-A channels (black: cloudy condition; yellow: clear-sky condition) compared with CloudSAT Profiling Radar (red)
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