 |
| Titel |
Global data set of biogenic VOC emissions calculated by the MEGAN model over the last 30 years |
| VerfasserIn |
K. Sindelarova, C. Granier, I. Bouarar, A. Guenther, S. Tilmes, T. Stavrakou, J.-F. Müller, U. Kuhn, P. Stefani, W. Knorr |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 17 ; Nr. 14, no. 17 (2014-09-09), S.9317-9341 |
| Datensatznummer |
250119016
|
| Publikation (Nr.) |
 copernicus.org/acp-14-9317-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
The Model of Emissions of Gases and Aerosols from Nature (MEGANv2.1) together
with the Modern-Era Retrospective Analysis for Research and Applications
(MERRA) meteorological fields were used to create a global emission data set
of biogenic volatile organic compounds (BVOC) available on a monthly basis
for the time period of 1980–2010. This data set, developed under the Monitoring Atmospheric Composition and Climate project (MACC), is called MEGAN–MACC. The
model estimated mean annual total BVOC emission of 760 Tg (C) yr−1
consisting of isoprene (70%), monoterpenes (11%), methanol (6%),
acetone (3%), sesquiterpenes (2.5%) and other BVOC species each
contributing less than 2%.
Several sensitivity model runs were performed to study the impact of
different model input and model settings on isoprene estimates and resulted
in differences of up to ±17% of the reference isoprene total.
A greater impact was observed for a sensitivity run applying parameterization
of soil moisture deficit that led to a 50% reduction of isoprene
emissions on a global scale, most significantly in specific regions of
Africa, South America and Australia.
MEGAN–MACC estimates are comparable to results of previous studies. More
detailed comparison with other isoprene inventories indicated significant
spatial and temporal differences between the data sets especially for
Australia, Southeast Asia and South America. MEGAN–MACC estimates of
isoprene, α-pinene and group of monoterpenes showed a reasonable
agreement with surface flux measurements at sites located in tropical forests
in the Amazon and Malaysia. The model was able to capture the seasonal
variation of isoprene emissions in the Amazon forest. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|