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| Titel |
Ground-based FTIR measurements of NH3 total columns and comparison with IASI data |
| VerfasserIn |
Corinne Vigouroux, Martine De Mazière, Filip Desmet, Christian Hermans, Bavo Langerock, Francis Scolas, Martin Van Damme, Lieven Clarisse, Pierre-François Coheur |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250082754
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| Zusammenfassung |
| Atmospheric ammonia (NH3) dominates global emissions of total reactive nitrogen. It has an
impact on human health, as a precursor of fine particulate matter, and on Earth’s
ecosystems, via deposition. The main source of global NH3 emissions is agriculture, the
remaining ones being the oceans, natural vegetation, humans, wild animals and
biomass burning. The global atmospheric budget of NH3 is still very uncertain
in chemical models, highlighting the critical need for satellite and ground-based
observations.
We present, for the first time, time-series (2009 - 2011) of NH3 total columns obtained from
ground-based FTIR measurements. These observations are performed at Reunion Island
(21°S, 55°E), one of the two subtropical stations, in Southern Hemisphere, of the
ground-based Network for the Detection of Atmospheric Composition Change (NDACC)
equipped with FTIR instruments. The seasonal and inter-annual variabilities of ammonia
observed at Reunion Island from the ground are compared to the ones derived from recent
IASI data obtained with a new retrieval method based on the calculation of a Hyperspectral
Range Index. |
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