globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.12.001
论文题名:
High-resolution modelling closes the gap between data and model simulations for Mid-Holocene and present-day biomes of East Africa
作者: Fer I.; Tietjen B.; Jeltsch F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 444
起始页码: 144
结束页码: 151
语种: 英语
英文关键词: Biome ; Climate change ; Dynamic vegetation models ; East Africa ; Leaf area index ; Mid-Holocene
英文摘要: East Africa hosts a striking diversity of terrestrial ecosystems, which vary both in space and time due to complex regional topography and a dynamic climate. The structure and functioning of these ecosystems under this environmental setting can be studied with dynamic vegetation models (DVMs) in a spatially explicit way. Yet, regional applications of DVMs to East Africa are rare and a comprehensive validation of such applications is missing. Here, we simulated the present-day and mid-Holocene vegetation of East Africa with the DVM, LPJ-GUESS and we conducted an exhaustive comparison of model outputs with maps of potential modern vegetation distribution, and with pollen records of local change through time. Overall, the model was able to reproduce the observed spatial patterns of East African vegetation. To see whether running the model at higher spatial resolutions (10' × 10') contribute to resolve the vegetation distribution better and have a better comparison scale with the observational data (i.e. pollen data), we run the model with coarser spatial resolution (0.5° × 0.5°) for the present-day as well. Both the area- and point-wise comparison showed that a higher spatial resolution allows to better describe spatial vegetation changes induced by the complex topography of East Africa. Our analysis of the difference between modelled mid-Holocene and modern-day vegetation showed that whether a biome shifts to another is best explained by both the amount of change in precipitation it experiences and the amount of precipitation it received originally. We also confirmed that tropical forest biomes were more sensitive to a decrease in precipitation compared to woodland and savanna biomes and that Holocene vegetation changes in East Africa were driven not only by changes in annual precipitation but also by changes in its seasonality. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68582
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作者单位: Department of Plant Ecology and Nature Conservation, Institute of Biochemistry and Biology, University of Potsdam, Maulbeerallee 2, Potsdam, Germany; DFG Graduate School Shaping the Earth's Surface in a Variable Environment, University of Potsdam, Karl-Liebknecht-Str. 24, Potsdam, Germany; Biodiversity and Ecological Modelling, Institute of Biology, Freie Universität Berlin, Altensteinstr. 6, Berlin, Germany; Berlin-Brandenburg, Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany; ZALF, Leibniz-Centre for Agricultural Landscape Research, Eberswalder Str. 84, Müncheberg, Germany

Recommended Citation:
Fer I.,Tietjen B.,Jeltsch F.. High-resolution modelling closes the gap between data and model simulations for Mid-Holocene and present-day biomes of East Africa[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,444
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