Aerosol, Cloud and Trace Gas Measurements in
the Troposphere and Lower Stratosphere

A contribution to ACCENT-TROPOSAT-2, Task Group 1

Don Grainger

Atmospheric, Oceanic & Planetary Physics, Clarendon Laboratory,
Parks Road, Oxford OX1 3PU, England
Tel: +44 1865 272 888
Fax: +44 1865 272 923

This study concerns the development and application of algorithms for the retrieval of aerosol, cloud and trace gas properties from satellite measurements..

Activities

1.   Global Retrieval of ATSR Cloud Parameters and Evaluation (GRAPE)  was initially conceived is a project to produce a global cloud dataset using a state-of-the-art physical retrieval of the entire duration of the ATSR-2 mission (aboard ERS-2), see www.atm.ox.ac.uk/group/grape/.  However we have expanded our original goal (not reflected in the website) to retrieve aerosol properties from ATSR and expanded the GRAPE algorithm to have the ability to ingest AATSR and MSG-SEVERI data (and in principle MODIS, MERIS, SEAWIFS and AVHRR). The retrievals currently provide estimates of cloud (height, optical depth, phase and particle size) and aerosol (optical depth and effective radius) properties from multichannel nadir observations. Our intension is to expand the algorithm to include ATSR’s forward view. We are currently working towards producing a 10 year climatology of aerosol and cloud properties from the ATSR/2 and AATSR measurements. Additionally we are involved in validation studies (e.g. ADRIEX) to compare results with aircraft and ground based measurements.

2.   MORSE (www.atm.ox.ac.uk/MORSE) is an algorithm developed under NERC's Earth Observation Enabling Fund to perform retrievals of atmospheric profiles from Michelson Interferometer for Passive Atmospheric Sounding

(MIPAS) spectra.  We have a number of student and post-doc projects retrieving trace gas concentrations (mostly in the stratosphere but potentially down to about 6 km). Our current target species are SF6, NH3, OCS, SO2, H2O, CH4, CO, O3, H2O2, HO2 and isotopes HDO, H2(18)O, CH3D, O(18)OO and OO(18)O.

Time schedule

 

2004

2005

2006

2007

2008

2009

Activity 1

*

*

*

*

*

*

Activity 2

*

*

*

*

*

*

Long term goal is the provision of well validated data sets of atmospheric properties.

Funding

The funding for this work comes from a number of grants (EU, ESA and NERC) and NERC studentships.

Oxford Co-workers

Anu Dudhia, Graham Ewen and Gareth Thomas  

 

 


 Return to the top of the page