The ICARE Thematic Center was created in 2003 by CNES, CNRS, the Nord-Pas-De-Calais Regional Council, and the University of Lille, to provide various services to support the research community in fields related to atmospheric research, such as aerosols, clouds, radiation, water cycle, and their interactions. ICARE's initial emphasis is the production and distribution of remote sensing data derived from Earth observation missions from CNES, NASA, and EUMETSAT. One of ICARE's main components is the Data and Services Center, located at the University of Lille, which develops science algorithms and production codes, building on the expertise from various partner Science Computing Facilities, and distributes products to the users community.


Public release of Megha-Tropiques/SAPHIR
Relative Humidity profiles products – July 2015


The French Megha-Tropiques science team is pleased to announce the public release of the layer-averaged relative humidity profiles (L2-RH) derived from the SAPHIR instrument. This new Level-2 product is available from the start of the mission (October 2011) until present. (click here to access the data from the ICARE archive interface (current version: v1.00).
The SAPHIR relative humidity profiles are produced for 6 altitude layers: 100-200hPa, 250-350hPa, 400-600hPa, 650-700hPa, 750-800hPa and 850-950hPa. The retrieval scheme named ARPIA ("Atmospheric Relative humidity profile Including the Analysis of confidence intervals") provides an estimate of the mean RH as well as its standard deviation interpreted as the 1-sigma confidence interval. ARPIA considers cloud-free and cloudy conditions, oceanic and continental scenes. Known limitations are for icy layers on top of convective clouds and for precipitating conditions, which are filtered out using the Hong et al. (2005) threshold method adapted for SAPHIR channels.
The details of the method will be soon available in a peer-reviewed paper.

Second announcement and call for abstracts
International conference on “Water and Energy cycles in the Tropics”
17-19 November 2015, Paris, France
Deadline for abstract submission extended to June 19


The aim of the conference is to provide a forum to review and discuss the latest research on the topic of the water and energy cycles with emphasis on tropical regions. The tropical energy cycles are central to the climate, its variability and its future evolution as reflected in the WCRP Grand Challenges being led by both the GEWEX program and the WGCM. The dynamical nature of the tropical water cycle and the control on the energy balance on both the tropical atmospheric dynamics and water cycle is one of the main incentives of the conference.
The deadline for abstract submission is June 15, 2015 (extended to June 19).

New product announcement:
Release of SEVIRI AERUS-GEO aerosol product – January 2015

MSG/SEVIRI AERUS AOD 0.63 µm observed by SEVIRI
Image credit: CNRM-GAME/ICARE.


A new SEVIRI aerosol product has been developed in the framework of a joint collaboration between Meteo France (CNRM-GAME) and ICARE. The new daily (daytime) aerosol optical depth product (SEV_AERUS-AEROSOL-NRT-D3) is public (click here to access the data from the archive interface (current version: v1.01, year 2014 until present)).
The AERUS-GEO (Aerosol and surface albEdo Retrieval Using a directional Splitting method-application to GEOstationary data) product is derived from observations from the Meteosat Second Generation (MSG) geostationary satellite covering Europe, Africa, and part of Asia and South America. The retrieval method exploits the directional information contained in the series of 96 MSG observations per day of the Earth’s disk to derive a daily mean AOD and an Angström exponent. Detailed description of the algorithm and evaluation studies are available in Carrer et al. 2010 (JGR) and Carrer el al., 2014 (see Publications). A reprocessing of the whole SEVIRI archive (2004-present) will be available soon.

This image shows an example of the retrieved aerosol optical depth during a dust storm event over West Africa on June 22, 2014. Click here for the full resolution image or here for the ICARE geostationary browse interface.

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