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| Titel |
Local sources of global climate forcing from different categories of land use activities |
| VerfasserIn |
D. S. Ward, N. M. Mahowald |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2190-4979
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| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 6, no. 1 ; Nr. 6, no. 1 (2015-04-15), S.175-194 |
| Datensatznummer |
250115419
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| Publikation (Nr.) |
 copernicus.org/esd-6-175-2015.pdf |
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| Zusammenfassung |
| Identifying and quantifying the sources of climate impacts from land use and
land cover change (LULCC) is necessary to optimize policies regarding LULCC
for climate change mitigation. These climate impacts are typically defined
relative to emissions of CO2, or sometimes emissions of other
long-lived greenhouse gases. Here we use previously published estimates of
the radiative forcing (RF) of LULCC that include the short-lived forcing
agents O3 and aerosols, in addition to long-lived greenhouse gases and
land albedo change, for six projections of LULCC as a metric for quantifying
climate impacts. The LULCC RF is attributed to three categories of LULCC
activities: direct modifications to land cover, agriculture, and wildfire
response, and sources of the forcing are ascribed to individual grid points
for each sector. Results for the year 2010 show substantial positive
forcings from the direct modifications and agriculture sectors, particularly
from south and southeast Asia, and a smaller magnitude negative forcing
response from wildfires. The spatial distribution of future sources of LULCC
RF is highly scenario-dependent, but we show that future forest area change
can be used as a predictor of the future RF from direct modification
activities, especially in the tropics, suggesting that
deforestation-prevention policies that value land based on its C-content may
be particularly effective at mitigating climate forcing originating in the
tropics from this sector. However, the response of wildfire RF to tropical
land cover changes is not as easily scalable and yet imposes a non-trivial
feedback onto the total LULCC RF. |
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