 |
| Titel |
Lidar-observed enhancement of aerosols in the upper troposphere and lower stratosphere over the Tibetan Plateau induced by the Nabro volcano eruption |
| VerfasserIn |
Q. S. He, C. C. Li, J. Z. Ma, H. Q. Wang, X. L. Yan, J. Lu, Z. R. Liang, G. M. Qi |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 21 ; Nr. 14, no. 21 (2014-11-06), S.11687-11696 |
| Datensatznummer |
250119142
|
| Publikation (Nr.) |
 copernicus.org/acp-14-11687-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Vertical profiles of aerosol extinction coefficients were measured by a
micro-pulse lidar at Naqu (31.5° N, 92.1° E; 4508 m a.m.s.l.),
a meteorological station located on the central part of the
Tibetan Plateau during summer 2011. Observations show a persistent maximum
in aerosol extinction coefficients in the upper troposphere–lower
stratosphere (UTLS). These aerosol layers were generally located at an
altitude of 18–19 km a.m.s.l., 1–2 km higher than the tropopause, with
broad layer depth ranging approximately 3–4 km and scattering ratio of 4–9.
Daily averaged aerosol optical depths (AODs) of the enhanced aerosol layers
in UTLS over the Tibetan Plateau varied from 0.007 to 0.030, in agreement
with globally averaged levels of 0.018 ± 0.009 at 532 nm from previous
observations, but the percentage contributions of the enhanced aerosol
layers to the total AOD over the Tibetan Plateau are higher than those
observed elsewhere. The aerosol layers in UTLS wore off gradually with the
reducing intensity of the Asian monsoon over the Tibetan Plateau at the end
of August. The eruption of Nabro volcano on 13 June 2011 is considered an
important factor to explain the enhancement of tropopause aerosols observed
this summer over the Tibetan Plateau. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|