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| Titel |
Black carbon record based on a shallow Himalayan ice core and its climatic implications |
| VerfasserIn |
J. Ming, H. Cachier, C. Xiao, D. Qin, S. Kang, S. Hou, J. Xu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 5 ; Nr. 8, no. 5 (2008-03-06), S.1343-1352 |
| Datensatznummer |
250005797
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| Publikation (Nr.) |
 copernicus.org/acp-8-1343-2008.pdf |
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| Zusammenfassung |
| A continuous measurement for black carbon (hereafter "BC") in a 40 m
shallow ice core retrieved from the East Rongbuk Glacier (hereafter "ERG")
in the northeast saddle of Mt. Qomolangma (Everest) provided the first
historical record of BC deposition during the past ~50 yrs in the high
Himalyas. Apparent increasing trend (smooth average) of BC concentrations
was revealed since the mid-1990s. Seasonal variability of BC concentrations
in the ice core indicated higher concentrations in monsoon seasons than
those in non-monsoon seasons. Backward air trajectory analysis by the
HYSPLIT model indicated that South Asia's BC emissions had significant
impacts on the BC deposition in the Mt. Qomolangma (Everest) region. The
estimated average atmospheric BC concentration in the region was about 80 ng m−3
during 1951–2001. And it was suggested BC emitted from South Asia
could penetrate into the Tibetan Plateau by climbing over the elevated
Himalayas. A significant increasing trend of the radiative forcing simulated
by the SNICAR model appeared since 1990, which even exceeded 4.5 W m−2
in the summer of 2001. It was suggested that this amplitudes of BC
concentrations in the atmosphere over the Himalayas and consequently in the
ice in the glaciers could not be neglected when assessing the dual warming
effects on glacier melting in the Himalayas. |
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