# Presentation: 492215

## AURA Validation Meeting

**AURA Validation Meeting**
**Aerosol Working Group**
**Summary report**
**Pasadena, March 3, 2005**

## OMI Aerosol and Cloudalgorithm status and validation activities

**Pepijn Veefkind****1****, O. Torres****2****, J.F. de Haan****1****, A. Vassilkov****3**** **
**	****	****1) KNMI, De Bilt, The Netherlands**
**	****	****2) ****UMBC, Baltimore County, BA, USA**
**	****	****3) SSAI, Lanham, MD, USA**

## OMI Aerosol and Clouds

**Aerosol NUV (near ultraviolet) algorithm**
**Aerosol NUV and MW (multi-wavelength) algorithm**
**Cloud Coverage and Pressure  O****2****-O****2**
**Cloud Pressure - Raman.**

## Aerosol NUV (near ultraviolet)1/10/2005

- Images by Omar Torres

**Aerosol optical depth**

**Absorptive aerosol**
**optical depth**

## Aerosol NUV1/10/2005

- Images by Omar Torres

**PRELIMINARY**** ****DATA**

**Single scattering albedo**

**Aerosol optical depth**

## Multi-Wavelength Aerosol Optical Thickness

**PRELIMINARY DATA**

## Cloud pressureO2-O2 cloud product

**One day’s data; Blue- highest clouds**

## Preliminary CPL ComparisonCloud pressure determination

**The NASA/GSFC Cloud Physics Lidar (CPL) was flown onboard the WB-57 aircraft as a part of the Aura Validation Experiment (AVE).**

- Map of OMI cloud fraction

- Map of the WB-57 flight track

## EOS MLS 

**Cloud Measurements**
**Presentations by **
**Dong Wu **
**Jonathan Jiang**
**Jet Propulsion Laboratory**
**California Institute of Technology, Pasadena, California**

## GHz

**MLS clear and cloudy sky brightness temperatures**

**GHz**
**128**

**192**

**239**

**642**

**2522**

**Blue – clear sky    Red – cloudy**
**Note: 128 GHz channel detects a polarized signal from high clouds**

## 0

**Jonathan H. Jiang**

**Comparison of MLS and AIRS **_**% cloud occurrence**_**, 215 hPa**
**September 21-30, 2004**

**0**

**39 %**

**0**

**28 %**

## IWC (ice water content)

**IWC (**_**ice water content**_**)**
**in MLS v1.5 level 2 products**

-  From the 240 GHz radiances: 215-46 hPa.
-  McFarquhar-Heymsfiled size distribution.
-  Vertical resolution ~ 3.5 km.

_**Vertical Resolution**_

## MLS

**GFDL-GCM**
- Arakawa-Schubert
-  convection scheme
-  (RAS scheme)

**GFDL-GCM**
- Donner convection
-  scheme

**NCAR CAM**
- CSU upper cloud parameterization in the Multi-scale Modeling Framework (MMF)

**EOS-MLS IWC**
- McFarquhar-Heymsfiled crystal size distribution
- (Nov 2004 -Jan 2005)
**  ****(Preliminary)**

**Nov-Dec-Jan **
**Climatology of IWC (mg/m****3****)**

**GCM Year 2 in 30-year runs**

**Zonal Mean**

**150 hPa Maps**

- Collaboration with Duane Waliser, JPL

- Details in the posters by Waliser et al., and by Jiang et al.

_**MLS IWC data products will improve GCMs**_

**MLS**

## Comparison of MODIS and TES: cloud parameters

**Comparison of MODIS and TES: ****cloud parameters**

**Annmarie Eldering,**
**Susan Sund Kulawik, John Worden**
**Ming Luo, Robert Herman, **
**Kevin Bowman, Tony Clough**

## Previous comment: Cloud optical depth biases in temperature, H2O, and O3 retrievals are not present.

Comparisons in this presentation: TES and MODIS 
Cloud pressures 
Cloud optical depths

This work is a check on the reasonableness of the retrieved effective cloud pressures and optical depths.

**Comparisons in this presentation: TES and MODIS **
**Cloud pressures **
**Cloud optical depths**
**This work is a check on the reasonableness of the retrieved effective cloud pressures and optical depths.**

## TES CLOUD PARAMETERIZATION

**TES CLOUD PARAMETERIZATION**

*Effective extinction*
*(25 frequency values)*

*width parameter (fixed)*

*Altitude*

*layer thickness*

**Single cloud layer modeled as a Gaussian profile**
**Absorption and scattering modeled with an effective tau discretized on a coarse frequency grid 25 – 100 cm****-1**

## A

- TES agrees with MODIS for thick storm system (B)
- TES agree with MODIS in clear region (C)
- MODIS identifies snow surface as low clouds (D)
- MODIS cloud mask is primarily confidently clear or confidently cloudy for this case.

- B

- C

- D

- C

- B

- D

**100**

**1000**

**hPa**

**Size of symbol indicates magnitude of cloud optical depth**

**0**

**80**

**Latitude**

## HIRDLS Experiment

**HIRDLS Experiment**
**First cloud observations**

## Lambert et al., HIRDLS ATBD

**Channel 2**

**Channel 6**

**Lambert et al., HIRDLS ATBD**

**Example: HIRDLS limb radiance**
** ****at 21 km altitude**

## Channel 2 radiance profile – cloud present

**Channel 2 radiance profile – cloud present**

**Cloud**
**radiance**
**signature**

**Case A**

**Radiance**

**Altitude**
**km**

**0**

**10**

**20**

**30**

**40**

## Channel 2 radiance profile – no clouds

**Channel 2 radiance profile – no clouds**

**No clouds**
**are observed**

**Case B**

**Altitude**
**km**

**Radiance**

**0**

**10**

**20**

**30**

**40**

## Case A

**Low OLR values indicate deep convection**

**Case B**

**Case A**

**Radiance**
**perturbation**
**is seen**
**near deep**
**convection**