ICARE Highlights



1st announcement
3rd International A-Train Symposium
19-21 April 2017, Pasadena, California


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For over a decade, the A-Train Constellation has successfully collected a uniquely comprehensive environmental data set. The 3rd International A-Train Symposium will be an opportunity to learn and exchange information about A-Train scientific breakthroughs and to highlight how Earth science has benefited from the long, continuous, multi-sensor data set. The 3rd Symposium follows on previous A-Train Symposia held in Lille, France in 2007 and in New Orleans in 2010.
To see the official first circular, click here.
Additional information regarding the meeting, as well as on-line registration and abstract submission form, will be available at the following web site: https://espo.nasa.gov/a-train_2017. Another notice will be sent when registration and abstract submission are open.




New product announcement:
Release of POLAC wind speed product
derived from POLDER/PARASOL observations– May 2016


POLAC wind speed observed by PARASOL
Image credit: Harmel and Chami (2012)

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A wind speed product has been developed in the framework of a joint collaboration between the Laboratoire d’Océanographie de Villefranche (France) and ICARE. This new product is derived from POLDER/PARASOL polarimetric and multidirectional observations over the oceans using an algorithm named POLAC (POLarized Atmospheric Correction) and a method based on the dependence of the Sun glint radiation on wind speed. The wind speed is given at full PARASOL native spatial resolution (about 6 km at nadir) on a pixel basis, and in HDF format for each orbit (POLAC-L2 "Level-2") or daily (e.g. globally, POLAC-D3 "Level-3"). The Level-2 and Level-3 products are public. Click here for the Level-2 or here for the daily Level-3 to access the data from the ICARE archive interface. The current version is v1.00, with data processed from March 2005 to October 2013.
For a summary description of the method, see the POLAC document. Detailed description of the algorithm and validation studies using in-situ and satellite data are available in Harmel and Chami, 2011, 2012 and 2013 (see Publications).
This image shows an example of wind speed values retrieved from the PARASOL image acquired on May 5, 2006 over the north-west part of the Mediterranean Sea (from Fig. 1a, Harmel and Chami (2012)).




CALIPSO mission:
10 years analyzing clouds and aerosols
April 28, 2016


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Ten years ago to the day, on 28 April 2006, the French-U.S. CALIPSO satellite was sent aloft from Vandenberg Air Force Base, California, atop a Delta II launcher to take up its place in the A-Train constellation. With CALIPSO celebrating 10 years of science measurements in June 2016, it is time to reflect on a mission that has yielded a wealth of data, offering new insights into the workings of Earth’s climate system.
Read the press release (in English).
Lire le communiqué de presse (en français).




Release of CALIPSO V3-00 Lidar Level-3 Aerosol product
October 2015


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The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center in collaboration with the CALIPSO mission announces the release of the following monthly data products:

  • CAL_LID_L3_APro_AllSky-Standard-V3-00
  • CAL_LID_L3_APro_CloudFree-Standard-V3-00
  • CAL_LID_L3_APro_CloudySkyTransparent-Standard-V3-00
  • CAL_LID_L3_APro_CloudySkyOpaque-Standard-V3-00
Version 3.00 of the CALIOP Level-3 Aerosol Profile product contains several improvements to the initial beta release including refined sky conditions, reduced biases in single-species averages and corrected mean aerosol optical depth calculations.
The monthly product is available beginning with data from June 2006 (following CALIOP first light on June 13, 2006) through current. The Version 1.00 and 1.30 CALIOP Level-3 Aerosol Profile data products will no longer be generated beyond September 2015.




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


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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


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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.

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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.



2e atelier TRATTORIA: "Transfert Radiatif
dans les ATmosphères Terrestres pour les ObseRvations spatIAles"

2nd workshop on "Radiative transfer in the atmosphere for spatial observations”
23-25 March, 2015, Polytech’Lille, University of Lille 1


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Le CNES organise, avec l’Université Lille 1, la seconde édition du workshop TRATTORIA. Cet atelier sur les codes de transfert radiatif atmosphérique sera l’occasion de dresser un panorama des codes utilisés dans les différentes communautés scientifiques françaises et de discuter des évolutions attendues pour les prochaines années, particulièrement pour les missions spatiales d’observation de la Terre. A la suite de tables rondes thématiques, des recommandations seront émises pour orienter les travaux futurs autour des codes de transfert radiatif. Cet atelier se déroulera du 23 au 25 mars 2015 à Polytech’Lille, à l’Université Lille 1. Les inscriptions sont gratuites, mais le nombre de participants est limité à 100.

The CNES and the University of Lille 1 are organizing the second workshop on Radiative transfer codes in the atmosphere. It will be held at the University of Lille 1, 23-25 March, 2015. The aim of the workshop is to provide an overview of the radiative codes used by the French science community, to foster exchanges between research scientists from multiple disciplines and to discuss perspectives for the coming years regarding spatial remote sensing. Registration to the workshop is free but seating is limited.




CALIOP V4 Level-1 Product Release
November 2014


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The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center in collaboration with the CALIPSO mission team announces the release of the following standard data product: CAL_LID_L1-Standard-V4-00
This updated version of the CALIOP Level-1 data product substantially improves both the 532nm and 1064nm calibration accuracies. Changes to the calibration techniques were firmly rooted by a thoroughly documented and peer-reviewed approach.
The version 3.x (3.01, 3.02 and 3.30) CALIOP Level-1 data product will continue to be generated and made publically available, with version 4.0 running in parallel. Unlike version 3.x, which is released continuously following 2-3 day latency from downlink, new releases of the version 4.0 product will be made periodically in discrete blocks.

The product is available beginning with data from June 13, 2006 (following CALIOP first light), and as of this announcement, through December 31, 2013. Remaining data will be available as it is produced.




New product announcement – October 2014
MODIS-like SEVIRI cloud product:
public beta release for evaluation purposes


Cloud top pressure observed by SEVIRI.
Photo credit: NASA/NOAA/LOA/ICARE.

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A new SEVIRI cloud product has been developed in the framework of a joint project between scientists and data experts from NASA, NOAA, LOA, and ICARE. This new dataset, called SEV06-CLD, is derived from the MSG/SEVIRI instrument observations using an algorithm that replicates the retrieval core of the Collection 6 MODIS Level-2 cloud product (MOD06_L2 and MYD06_L2) augmented with NOAA GOES-R cloud height product. Moreover, several ancillary datasets are used to produce SEV06-CLD including the SAFNWC cloud type product.

The project team is pleased to announce the public release of the SEVIRI SEV06-CLD beta product at ICARE for evaluation purposes. Users are invited to provide feedback and comments on product quality.

For detailed information on the product, data access and availability, and data use restrictions, please refer to the SEV06-CLD Cloud Product Technical Document. More information will soon be available on the ICARE web site.
The image on the left (Click here for the full resolution image) shows an example of the retrieved cloud top pressure for a SEVIRI slot (e.g. single image).



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