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TIBAGS: Tropospheric Iodine Monoxide and Its Coupling to Biospheric and Atmospheric Variables—a Global Satellite Study

  • Anja SchönhardtEmail author
  • Andreas Richter
  • John P. Burrows
Chapter
Part of the Springer Earth System Sciences book series (SPRINGEREARTH)

Abstract

In the framework of the TIBAGS project, spatial and temporal variations of iodine monoxide, IO, in the Earth’s atmosphere were analysed, and relations between IO and further variables of the biosphere and atmosphere were investigated. The abundances and variations of IO are not well known on a global scale, partly because IO amounts are comparably low. However, due to strong reactivity, also small amounts of IO may have a substantial impact on tropospheric composition. In the present study, satellite data from the SCIAMACHY (Scanning Imaging Absorption spectrometer for Atmospheric CHartographY) sensor on board the ENVISAT satellite is used and a more global view on the subject is obtained. IO amounts are retrieved from measurements of scattered sunlight by using an absorption spectroscopy technique. Two consistent IO data sets are retrieved, one based on near real-time data (2004–2011) and one based on reprocessed consolidated data (2003–2010). Largest amounts of IO are found in the Polar Regions of Antarctica, for example in the Weddell Sea area in spring time. In addition, enhanced IO amounts are detected above some but not all biologically active ocean areas which show high Chlorophyll-a (Chl-a) signals. Correlations between IO and diatom distributions are in some areas stronger than between IO and Chl-a in general, indicating the importance of the specific phytoplankton species present in the ocean water.

Keywords

Differential Optical Absorption Spectroscopy Iodine Compound Slant Column Iodine Release Atmospheric Iodine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The TIBAGS project has been financially supported by ESA within the CESN framework. Further financial support was received from the State and University of Bremen, the German Aerospace Center DLR, and the European Union. SCIAMACHY data are provided by ESA and DLR. Support by Vladimir Rozanov on the application of SCIATRAN is gratefully acknowledged. Sea ice concentration data from AMSR-E observations are available at ICDC, Integrated Climate Data Center, ZMAW, in Hamburg, http://icdc.zmaw.de/seaiceconcentration asi amsre.html?&L = 1. Chl-a data are provided through the ESA GlobColour Project: ACRI & the GlobColour Team, funded by ESA with data from ESA, NASA and GeoEye, MERIS/MODIS/SeaWiFS merged product, information and data are available at http://www.globcolour.info. Diatom data are courtesy of Astrid Bracher, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, and Tilman Dinter, University of Bremen, in the framework of HGF project Phytooptics (VH-NG-300) and EU project SHIVA (226224-FP7-ENV.2008.1.1.2.1).

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Anja Schönhardt
    • 1
    Email author
  • Andreas Richter
    • 1
  • John P. Burrows
    • 1
  1. 1.Institute of Environmental Physics, University of BremenBremenGermany

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