 |
| Titel |
Implications of accounting for land use in simulations of ecosystem carbon cycling in Africa |
| VerfasserIn |
M. Lindeskog, A. Arneth, A. Bondeau, K. Waha, J. Seaquist, S. Olin, B. Smith |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
2190-4979
|
| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 4, no. 2 ; Nr. 4, no. 2 (2013-11-01), S.385-407 |
| Datensatznummer |
250084959
|
| Publikation (Nr.) |
 copernicus.org/esd-4-385-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| Dynamic global vegetation models (DGVMs) are important tools for modelling
impacts of global change on ecosystem services. However, most models do not
take full account of human land management and land use and land cover
changes (LULCCs). We integrated croplands and pasture and their management
and natural vegetation recovery and succession following cropland
abandonment into the LPJ-GUESS DGVM. The revised model was applied to Africa
as a case study to investigate the implications of accounting for land use
on net ecosystem carbon balance (NECB) and the skill of the model in
describing agricultural production and reproducing trends and patterns in
vegetation structure and function. The seasonality of modelled monthly
fraction of absorbed photosynthetically active radiation (FPAR) was shown to
agree well with satellite-inferred normalised difference vegetation index
(NDVI). In regions with a large proportion of cropland, the managed land
addition improved the FPAR vs. NDVI fit significantly. Modelled 1991–1995
average yields for the seven most important African crops, representing
potential optimal yields limited only by climate forcings, were generally
higher than reported FAO yields by a factor of 2–6, similar to previous
yield gap estimates. Modelled inter-annual yield variations during 1971–2005
generally agreed well with FAO statistics, especially in regions with
pronounced climate seasonality. Modelled land–atmosphere carbon fluxes for
Africa associated with land use change (0.07 PgC yr−1 release to the
atmosphere for the 1980s) agreed well with previous estimates. Cropland
management options (residue removal, grass as cover crop) were shown to be
important to the land–atmosphere carbon flux for the 20th century. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|