Journal Article

PreJuSER-22397

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A global climatology of upper-tropospheric ice supersaturation occurence inferred from the Atmospheric Infrared Sounder calibrated by MOZAIC

Lamquin, N. ; Stubenrauch, C. J. ; Gierens, K. ; Burkhardt, U. ; Smit, H.FZJ*

2012
EGU Katlenburg-Lindau

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/7543  doi:10.5194/acp-12-381-2012

Abstract: Ice supersaturation in the upper troposphere is a complex and important issue for the understanding of cirrus cloud formation. On one hand, infrared sounders have the ability to provide cloud properties and atmospheric profiles of temperature and humidity. On the other hand, they suffer from coarse vertical resolution, especially in the upper troposphere and therefore are unable to detect shallow ice supersaturated layers. We have used data from the Measurements of OZone and water vapour by AIrbus in-service airCraft experiment (MOZAIC) in combination with Atmospheric InfraRed Sounder (AIRS) relative humidity measurements and cloud properties to develop a calibration method for an estimation of occurrence frequencies of ice supersaturation. This method first determines the occurrence probability of ice supersaturation, detected by MOZAIC, as a function of the relative humidity determined by AIRS. The occurrence probability function is then applied to AIRS data, independently of the MOZAIC data, to provide a global climatology of upper-tropospheric ice supersaturation occurrence. Our climatology is then compared to ice supersaturation occurrence statistics from MOZAIC alone and related to high cloud occurrence from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). As an example of application it is compared to model climatologies of ice supersaturation from the Integrated Forecast System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF) and from the European Centre HAmburg Model (ECHAM4). This study highlights the benefits of multi-instrumental synergies for the investigation of upper tropospheric ice supersaturation.

Keyword(s): J

Note: This work was supported by CNRS and Ecole Polytechnique. The AIRS version 5 data were obtained through the Goddard Earth Sciences Data and Information Services (http://daac.gsfc.nasa.gov/) and the CALIOP data were obtained through the Atmospheric Sciences Data Center (ASDC) at NASA Langley Research Center by the ICARE Thematic Center created by CNES (http://www-icare.univ-lille1.fr/) and its interface ClimServ created for Institut Pierre-Simon Laplace (http://climserv.ipsl.polytechnique.fr/). The authors acknowledge for the strong support of the European Commission, Airbus, and the Airlines (Lufthansa, Austrian, Air France) who carry free of charge the MOZAIC equipment and perform the maintenance since 1994. MOZAIC is presently funded by INSU-CNRS (France), Meteo-France, and Forschungszentrum (FZJ, Julich, Germany). The MOZAIC data base is supported by ETHER (CNES and INSU-CNRS). ECMWF data have been retrieved within the framework of a special project on "Ice Supersaturation and Cirrus Clouds (SPDEISSR)". The authors thank all the corresponding teams for assistance and public release of data products. The work contributes to COST Action ES-0604 "Water Vapour in the Climate System (WaVaCS)" and to the aforementioned SPDEISSR. The authors thank the reviewers for their fruitful comments.The publication of this article is financed by CNRS-INSU.

---

Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. Atmosphäre und Klima (P23)

Appears in the scientific report 2012

---

Database coverage:
; ; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---