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| Titel |
The Impact of Fall Emissions of CO2 and CH4 in the Arctic |
| VerfasserIn |
Colm Sweeney, Charles Miller, Steve Wofsy, Roisin Cummane, Nick Parazoo, Walt Oechel, Donatella Zona |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250153234
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| Publikation (Nr.) |
 EGU/EGU2017-18180.pdf |
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| Zusammenfassung |
| The Arctic Boreal Region (ARB) is by all accounts a global carbon hot spot with rapidly changing temperatures, sea ice extent and length of summer seasons that have lead to some surprising changes in the imprint that the Arctic has on the atmospheric CO2 and CH4. Our study takes advantage of the recently completed the NASA CARVE EV-1 suborbital mission as well as the long term NOAA ground and aircraft-based measurements of atmospheric CO2 and CH4 which show that fall and early wintertime emissions are a dominant part of the seasonal emissions observed in the Arctic. While CO2 emissions do appear to be increasing over the last 40 years CH4 emissions are not increasing suggesting that the anaerobic pathway degradation of organic carbon is not dominant. This finding provides an important driver for the large changes in amplitude of the CO2 seasonal cycle, which is most pronounced over the Arctic, that has been observed but largely unexplained except through models which may be completely missing importance of wintertime emissions. |
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