Climate extremes in Loess of China coupled with the strength of deep-water formation in the North Atlantic
文献类型：期刊论文
| 作者 | Guo, ZT; Liu, TS; Fedoroff, N; Wei, LY; Ding, ZL; Wu, NQ; Lu, HY; Jiang, WY; An, ZS |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 1998-09 |
| 卷号 | 18期号:3-4页码:113-128 |
| 关键词 | loess paleosol monsoons paleoclimate North Atlantic Deep Water |
| DOI | 10.1016/S0921-8181(98)00010-1 |
| 文献子类 | Article; Proceedings Paper |
| 英文摘要 | The loess-paleosol sequences of the last 1.2 Ma in China have recorded two kinds of climate extremes: the strongly developed S4, S5-1 and S5-3 soils (corresponding to the marine delta(18)O stages 11, 13, and 15, respectively) as evidence of three episodes of great warmth and two coarse-grained loess units (L9 and L15, corresponding to the marine delta(18)O stages 22, 23, 24 and 38, respectively) which indicate severest glacial conditions. The climatic and geographical significance of these events are still unclear, and their cause remains a puzzle. Paleopedological, geochemical and magnetic susceptibility data from three loess sections (Xifeng, Changwu and Weinan) suggest that the S4, S5-1 and S5-3 soils were formed under sub-tropical semi-humid climates with a tentatively estimated mean annual temperature (MAT) of at least 4-6 degrees C higher and a mean annual precipitation (MAP) of 200-300 mm higher than for the present-day, indicating a much strengthened summer monsoon. The annual rainfall was particularly accentuated for the southern-most part of the Loess Plateau, suggesting that the monsoon rain belt (the contact of the monsoonal northward warm-humid air mass with the dry-cold southward one) might have stood at the southern part of the Plateau for a relatively long period each year. The loess units L9 and L15 were deposited under semi-desertic environments with a tentatively estimated MAT and MAP of only about 1.5-3 degrees C and 150-250 mm, indicating a much strengthened winter monsoon, and that the summer monsoon front could rarely penetrate into the Loess Plateau region. Correlation with marine carbon isotope records suggests that these climate extremes have large regional, even global, significance rather than being local phenomena in China. They match the periods with greatest/smallest Atlantic-Pacific delta(13)C gradients, respectively, indicating their relationships with the strength of Deep Water (NADW) production in the North Atlantic. These results suggest that the monsoon climate in the Loess Plateau region was significantly linked with the North Atlantic thermohaline circulation on timescales of 10(4) years. (C) 1998 Elsevier Science B.V. All rights reserved. |
| 学科主题 | Physical Geography ; Geology |
| WOS关键词 | MAGNETIC-SUSCEPTIBILITY RECORD ; PALEOSOL SEQUENCES ; ASIAN MONSOON ; TIME-SCALE ; PLATEAU ; MICROMORPHOLOGY ; STRATIGRAPHY ; EVENTS ; SECTION ; PACIFIC |
| WOS研究方向 | Geography, Physical ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000075509900004 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.ieecas.cn/handle/361006/11847]  |
| 专题 | 黄土与第四纪地质国家重点实验室（1985-2004） |
| 推荐引用方式 GB/T 7714 | Guo, ZT,Liu, TS,Fedoroff, N,et al. Climate extremes in Loess of China coupled with the strength of deep-water formation in the North Atlantic[J]. GLOBAL AND PLANETARY CHANGE,1998,18(3-4):113-128. |
| APA | Guo, ZT.,Liu, TS.,Fedoroff, N.,Wei, LY.,Ding, ZL.,...&An, ZS.(1998).Climate extremes in Loess of China coupled with the strength of deep-water formation in the North Atlantic.GLOBAL AND PLANETARY CHANGE,18(3-4),113-128. |
| MLA | Guo, ZT,et al."Climate extremes in Loess of China coupled with the strength of deep-water formation in the North Atlantic".GLOBAL AND PLANETARY CHANGE 18.3-4(1998):113-128. |
入库方式： OAI收割
来源：地球环境研究所
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