Climatic changes in Eurasia and Africa at the last glacial maximum and mid-Holocene: reconstruction from pollen data using inverse vegetation modelling
文献类型：期刊论文
| 作者 | Wu, Haibin; Guiot, Joel; Brewer, Simon; Guo, Zhengtang |
| 刊名 | CLIMATE DYNAMICS
 |
| 出版日期 | 2007-08-01 |
| 卷号 | 29期号:2-3页码:211-229 |
| 关键词 | palaeoclimatology pollen biome scores BIOME4 atmospheric CO2 LGM mid-Holocene |
| ISSN号 | 0930-7575 |
| DOI | 10.1007/s00382-007-0231-3 |
| 文献子类 | Article |
| 英文摘要 | In order to improve the reliability of climate reconstruction, especially the climatologies outside the modern observed climate space, an improved inverse vegetation model using a recent version of BIOME4 has been designed to quantitatively reconstruct past climates, based on pollen biome scores from the BIOME6000 project. The method has been validated with surface pollen spectra from Eurasia and Africa, and applied to palaeoclimate reconstruction. At 6 cal ka BP (calendar years), the climate was generally wetter than today in southern Europe and northern Africa, especially in the summer. Winter temperatures were higher (1-5 degrees C) than present in southern Scandinavia, northeastern Europe, and southern Africa, but cooler in southern Eurasia and in tropical Africa, especially in Mediterranean regions. Summer temperatures were generally higher than today in most of Eurasia and Africa, with a significant warming from similar to 3 to 5 degrees C over northwestern and southern Europe, southern Africa, and eastern Africa. In contrast, summers were 1-3 degrees C cooler than present in the Mediterranean lowlands and in a band from the eastern Black Sea to Siberia. At 21 cal ka BP, a marked hydrological change can be seen in the tropical zone, where annual precipitation was similar to 200-1,000 mm/year lower than today in equatorial East Africa compared to the present. A robust inverse relationship is shown between precipitation change and elevation in Africa. This relationship indicates that precipitation likely had an important role in controlling equilibrium-line altitudes (ELA) changes in the tropics during the LGM period. In Eurasia, hydrological decreases follow a longitudinal gradient from Europe to Siberia. Winter temperatures were similar to 10-17 degrees C lower than today in Eurasia with a more significant decrease in northern regions. In Africa, winter temperature was similar to 10-15 degrees C lower than present in the south, while it was only reduced by similar to 0-3 degrees C in the tropical zone. Comparison of palaeoclimate reconstructions using LGM and modern CO2 concentrations reveals that the effect of CO2 on pollen-based LGM reconstructions differs by vegetation type. Reconstructions for pollen sites in steppic vegetation in Europe show warmer winter temperatures under LGM CO2 concentrations than under modern concentrations, and reconstructions for sites in xerophytic woods/scrub in tropical high altitude regions of Africa are wetter for LGM CO2 concentrations than for modern concentrations, because our reconstructions account for decreased plant water use efficiency. |
| WOS关键词 | PLANT MACROFOSSIL DATA ; LOW ATMOSPHERIC CO2 ; INTERCOMPARISON PROJECT PMIP ; SEA-SURFACE TEMPERATURES ; WATER-USE EFFICIENCY ; FORMER SOVIET-UNION ; LATE-QUATERNARY ; YR BP ; PHYSIOLOGICAL SIGNIFICANCE ; BIOME RECONSTRUCTION |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000247203600006 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67510]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Guiot, Joel |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, SKLLQ, Xian 710075, Peoples R China 2.Univ Paul Cezanne, CNRS, CEREGE, UMR 6635,Europole Mediterraneen Arbois, F-13545 Aix En Provence 4, France 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Haibin,Guiot, Joel,Brewer, Simon,et al. Climatic changes in Eurasia and Africa at the last glacial maximum and mid-Holocene: reconstruction from pollen data using inverse vegetation modelling[J]. CLIMATE DYNAMICS,2007,29(2-3):211-229. |
| APA | Wu, Haibin,Guiot, Joel,Brewer, Simon,&Guo, Zhengtang.(2007).Climatic changes in Eurasia and Africa at the last glacial maximum and mid-Holocene: reconstruction from pollen data using inverse vegetation modelling.CLIMATE DYNAMICS,29(2-3),211-229. |
| MLA | Wu, Haibin,et al."Climatic changes in Eurasia and Africa at the last glacial maximum and mid-Holocene: reconstruction from pollen data using inverse vegetation modelling".CLIMATE DYNAMICS 29.2-3(2007):211-229. |
入库方式： OAI收割
来源：地质与地球物理研究所
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