Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073740 |
Multi vegetation model evaluation of the Green Sahara climate regime | |
Hopcroft, Peter O.1,2; Valdes, Paul J.1,2; Harper, Anna B.3; Beerling, David J.4 | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | During the Quaternary, the Sahara desert was periodically colonized by vegetation, likely because of orbitally induced rainfall increases. However, the estimated hydrological change is not reproduced in climate model simulations, undermining confidence in projections of future rainfall. We evaluated the relationship between the qualitative information on past vegetation coverage and climate for the mid-Holocene using three different dynamic vegetation models. Compared with two available vegetation reconstructions, the models require 500-800mmof rainfall over 20 degrees-25 degrees N, which is significantly larger than inferred from pollen but largely in agreement with more recent leaf wax biomarker reconstructions. The magnitude of the response also suggests that required rainfall regime of the early to middle Holocene is far from being correctly represented in general circulation models. However, intermodel differences related to moisture stress parameterizations, biases in simulated present-day vegetation, and uncertainties about paleosoil distributions introduce uncertainties, and these are also relevant to Earth system model simulations of African humid periods. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400040 |
WOS关键词 | ENVIRONMENT SIMULATOR JULES ; LAST GLACIAL MAXIMUM ; AFRICAN HUMID PERIOD ; EARTH SYSTEM MODELS ; NORTHERN AFRICA ; CARBON-CYCLE ; SEMIARID ECOSYSTEMS ; PLANT GEOGRAPHY ; MIDDLE HOLOCENE ; RIVER SYSTEM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28787 |
专题 | 气候变化 |
作者单位 | 1.Univ Bristol, Sch Geog Sci, Bristol Res Initiat Dynam Global Environm, Bristol, Avon, England; 2.Univ Bristol, Cabot Inst, Bristol, Avon, England; 3.Univ Exeter, Coll Engn Math & Phys Sci, Exeter, Devon, England; 4.Univ Sheffield, Dept Anim & Plant Sci, Sheffield, S Yorkshire, England |
推荐引用方式 GB/T 7714 | Hopcroft, Peter O.,Valdes, Paul J.,Harper, Anna B.,et al. Multi vegetation model evaluation of the Green Sahara climate regime[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Hopcroft, Peter O.,Valdes, Paul J.,Harper, Anna B.,&Beerling, David J..(2017).Multi vegetation model evaluation of the Green Sahara climate regime.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Hopcroft, Peter O.,et al."Multi vegetation model evaluation of the Green Sahara climate regime".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
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