Global Measurements of Water Vapour in the Tropopause Region
and Upper Troposphere with MIPAS/Envisat

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

Mathias Milz

Institut für Meteorologie und Klimaforschung,
Universitaet Karlsruhe/Forschungszentrum Karlsruhe GmbH, Postfach 3640, D-76021 Karlsruhe, Germany
Tel: (+49) 7247/82-5203
Fax: (+49) 7247/82-6141
 

Since March 2002 MIPAS onboard Envisat performs measurements of atmospheric composition covering the mesosphere down to the upper troposphere. The scientific retrieval processor operated at IMK provides trace gas and temperature profiles which include the tropopause region and, for cloud free cases, the upper troposphere. Among other species water vapour in this region is of interest with respect to its influence on the radiative budget as well as for its use as tracer for transport processes across the tropopause.

At IMK a unique data set of water vapour measurements in the tropopause region exists for the time from September 2002 to November 2003. Further retrievals are foreseen to fully exploit the existing spectral data set of MIPAS measurements.

Together with modelled data these results shall be used to improve our knowledge on water vapour distribution in the UTLS and understand the role in climate change. Intrusion of air masses and water vapour into the lowermost stratosphere and the seasonal variation of transport processes will be examined on basis of single events and aiming to a climatology.

The obtained global distributions of water vapour shall be compared to GCMs (e.g. collaboration with DLR, Dameris). Differences and agreements between models and measurements shall be examined and understood.

Time Schedule

 

2004

2005

2006

2007

2008

Activity

*

*

*

*

*

Approximate manpower and cost

 

2004

2005

2006

2007

2008

Personnel/man-years

1*

1

1

1

1

Yearly costs (kEUR)

60

60

60

60

60

Co-workers

Gabriele Stiller, Karlsruhe

Martin Dameris

DLR, Institut für Physik der Atmosphäre, Oberpfaffenhofen
82234 Wessling, Germany   

 

 


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