The 2015 edition of the GEISA spectroscopic database

Abstract

The GEISA database (Gestion et Etude des Informations Spectroscopiques Atmosphériques: Management and Study of Atmospheric Spectroscopic Information) has been developed and maintained by the ARA/ABC(t) group at LMD since 1974. GEISA is constantly evolving, taking into account the best available spectroscopic data. This paper presents the 2015 release of GEISA (GEISA-2015), which updates the last edition of 2011 and celebrates the 40th anniversary of the database. Significant updates and additions have been implemented in the three following independent databases of GEISA. The “line parameters database” contains 52 molecular species (118 isotopologues) and transitions in the spectral range from 10−6 to 35,877.031 cm−1, representing 5,067,351 entries, against 3,794,297 in GEISA-2011. Among the previously existing molecules, 20 molecular species have been updated. A new molecule (SO3) has been added. HDO, isotopologue of H2O, is now identified as an independent molecular species. Seven new isotopologues have been added to the GEISA-2015 database. The “cross section sub-database” has been enriched by the addition of 43 new molecular species in its infrared part, 4 molecules (ethane, propane, acetone, acetonitrile) are also updated; they represent 3% of the update. A new section is added, in the near-infrared spectral region, involving 7 molecular species: CH3CN, CH3I, CH3O2, H2CO, HO2, HONO, NH3. The “microphysical and optical properties of atmospheric aerosols sub-database” has been updated for the first time since 2003. It contains more than 40 species originating from NCAR and 20 from the ARIA archive of Oxford University. As for the previous versions, this new release of GEISA and associated management software facilities are implemented and freely accessible on the AERIS/ESPRI atmospheric chemistry data center website

A Decadal Data Set of Global Atmospheric Dust Retrieved From IASI Satellite Measurements

“… Note . Most data can be found in the HITRAN (Massie & Hervig, ), GEISA (Jacquinet‐Husson et al, ), and ARIA (ARIA, ) spectral databases. OPAC = Optical Properties of Aerosols and Clouds; GADS = Global Aerosol Data Set; HITRAN = HIgh Resolution TRANsmission molecular absoption database; GEISA = Gestion et Etude des Informations Spectroscopiques Atmosphériques.…”

Improved potential energy surface and spectral assignments for ammonia in the near-infrared region

“…Some of this information is provided by spectroscopic databases [4,5] , but there are large gaps in the coverage. Al Derzi et al [6] give a comprehensive review of high resolution spectroscopic data recorded and analysed up to 2014.…”

New analysis of the ν6 and 2ν3 bands of methyl iodide (CH3I)

“…The rather strong m 6 band of CH 3 I, located at 892.916 cm À1 , which coincides with the 11 lm window of transparency in the atmosphere [2][3][4], could therefore be a good candidate for such detection. However, no spectroscopic parameters exist for this molecule in the common access spectroscopic databases HITRAN [https://www.cfa.harvard.edu/hitran/] [5] or GEISA [http://ether.ipsl.jussieu.fr/etherTypo/?id=950] [6]. This work, which deals with line positions, is the very first contribution to fill this gap.…”