# Presentation: 388214

## CERES SARBOn-line Fu-Liou Radiative Transfer Code Differential 200503 Version

- Fred Rose1, Qiang Fu3 ,Tom Charlock2, Seiji Kato2, David Kratz2, Dave Rutan1 ,Zhonghai Jin1
- 1) Analytical Services and Materials, Hampton Va
- 2) Nasa Langley, Hampton Va
- 3) U. Washington, Seattle Wa.
- Ceres Science Team Meeting
- Princeton ,NJ   May 2-4 2005

## FuLiou Radiative Transfer Model

- Gamma weighted 2-stream (SW)*S.Kato* , 2/4 stream (LW)*Q.Fu*
- Inhomogeneous clouds in SW
- 29 bands : 15 SW, 14 LW   ,  3 of 14 LW in WN
- Shortwave: ( 0.17 - 4.0)um  ( 2500-57000cm-1)
- Hitran 2000 (H20) ( O2,CO2,CH4) fixed : H20 continuum
-  *JPL*(1994) O3 uv , *WMO*(1985) O3 vis
- Longwave  (0-2850cm-1) (3.5um – infinity )
- H20  CO2  O3  N20  CH4   CFCs
- H20_Continuum(*Kratz&Rose)*
- Cloud Optical Properties  Water (*Y.Hu*)  Ice  (*Q.Fu*)
- Aerosol optical properties
*OPAC, Tegin&Lacis, D’Almedia, Lacis(2004)Dust*

## Uses

- Forcing cases
- Cloud+aerosol (cloud & aerosol – pristine)
- Cloud ( cloud & aerosol – aerosol)
- Aerosol (cloud & aerosol – cloud )
- Quick sensitivity studies
- Partial differentials { case B minus case A}
- Flux or radiance response to various input situations
- Tuning
- Ceres Sarb constrainment
- Impose TOA SW , LW, or window  flux mismatch
- Adjustments SkinT,Pw, surface albedo, aerosols, cloud (, z)

## Online Fu Code Options 

- Atmosphere options
- Standard ( tropical,MLS,MLW,SAS,saw)
-  Column PW ,O3 changes , skin temperature
- User input of p(z),t(z),h2o(z),o3(z)
- Surface Radiative properties
- Ocean Z. Jin COART surface albedo
- Ceres SARB IGBP land type spectral albedos and emissivity
- Outputs
- Table of broadband TOA and SURFACE , SW & LW
- Vertical flux profiles ( coarse 4 levels or fine 120 levels)
- Spectral SW { TOA albedo , surface transmission,sfc albedo}
- Spectral LW { TOA flux , surface flux }
- Longwave anisotropy
- Detailed but cryptic list of all inputs & outputs

## Options (Cont.)

- Clouds
- Fraction (ICA), optical depth, phase, particle size, top & base
- Overlapped clouds allowed
- Inhomogeniety : gamma distribution
- shape param. = (/)2
- Aerosols
- Column optical depth ( @0.63)
- Constituent type  determines spectral optical properties
- Scale height assumption for vertical profile

## Web Links

- On line Langley Fu-Liou Code
- _[http://www-cave.](http://www-cave.larc.nasa.gov/rose/flp)__[larc](http://www-cave.larc.nasa.gov/rose/flp)__[.](http://www-cave.larc.nasa.gov/rose/flp)__[nasa](http://www-cave.larc.nasa.gov/rose/flp)__[.](http://www-cave.larc.nasa.gov/rose/flp)__[gov](http://www-cave.larc.nasa.gov/rose/flp)__[/rose/](http://www-cave.larc.nasa.gov/rose/flp)__[flp](http://www-cave.larc.nasa.gov/rose/flp)_
- Ceres
- _[http://](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[asd](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[-www.](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[larc](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[.](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[nasa](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[.](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[gov](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[/](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[ceres](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[/](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[ASDceres](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)__[.html](http://asd-www.larc.nasa.gov/ceres/ASDceres.html)_
- Cave
- _[http://www-cave.](http://www-cave.larc.nasa.gov/cave)__[larc](http://www-cave.larc.nasa.gov/cave)__[.](http://www-cave.larc.nasa.gov/cave)__[nasa](http://www-cave.larc.nasa.gov/cave)__[.](http://www-cave.larc.nasa.gov/cave)__[gov](http://www-cave.larc.nasa.gov/cave)__[/cave](http://www-cave.larc.nasa.gov/cave)_

## No Web Access ?

- The following slides are examples of the actual web site outputs.

## Inputs

## Cloud and Aerosol Forcing Example

- Cloud (=1.0 ice de= 60. )+ Aerosol (Contnental =0.2)
- Pristine ( no cloud , no aerosol ) { only Rayleigh & gases}

## 2x Co2 

- Case A:  CO2 = 360 ppmv
- Case B:  CO2 =720 ppmv
- Changes only applied in Longwave

## Cloud Properties

- 2x  Cloud Optical Depth ( Tau:1.0  2.0)

- 1⁄2 Cloud Particle Size ( De: 60  30.0)