 |
| Titel |
Climate effects of seasonally varying Biomass Burning emitted Carbonaceous Aerosols (BBCA) |
| VerfasserIn |
G.-R. Jeong, C. Wang |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 17 ; Nr. 10, no. 17 (2010-09-07), S.8373-8389 |
| Datensatznummer |
250008755
|
| Publikation (Nr.) |
 copernicus.org/acp-10-8373-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| The climate impact of the seasonality of Biomass Burning emitted
Carbonaceous Aerosols (BBCA) is studied using an aerosol-climate model
coupled with a slab ocean model in a set of 60-year long simulations, driven
by BBCA emission data with and without seasonal variation, respectively. The
model run with seasonally varying emission of BBCA leads to an increase in
the external mixture of carbonaceous aerosols as well as in the internal
mixture of organic carbon and sulfate but a decrease in the internal mixture
of black carbon and sulfate relative to those in the run with constant
annual BBCA emissions, as a result of different strengths of source/sink
processes. The differences in atmospheric direct radiative forcing (DRF)
caused by BBCA seasonality are in phase with the differences in column
concentrations of the external mixture of carbonaceous aerosols in space and
time. In contrast, the differences in all-sky radiative forcing at the top
of the atmosphere and at the earth's surface extend beyond the BBCA source
regions due to climate feedback through cloud distribution and
precipitation. The seasonality of biomass burning emissions uniquely affects
the global distributions of convective clouds and precipitation, indicating
that these emissions have an impact on atmospheric circulation. In addition,
the climate response to the periodic climate forcing of BBCA is not limited
to biomass burning seasons but dynamically extends into non-biomass burning
seasons as well. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|