Reconstruction of May-June Palmer Drought Severity Index at South Margin of Tengger Desert , China
详细信息
- 责任者：Chen Feng (Key Laboratory of Tree-Ring Physical Chemic Research of China Meteorological Administration ; China Meteorological Administration ; Urumqi 830002 ; China) ; Yuan Yujiang
- 刊名：Scientia Geographica Sinica
- 出版年：2011
- 卷期：31(4)
- 关键词：全新世 ; Holocene ; 气候效应 ; climate effects ; 年轮 ; tree rings ; 腾格里沙漠 ; Tengger Desert
- 页码：p.434-439
- 图表：3 illus., 3 tables, 33 refs.
- 分类号：1400
- issnNo：ISSN1000-0690
- isbnNo：CN22-1124/P
摘要
The authors presented a drought reconstruction for the northern central China based on the earlywood width chronology developed from one site of Pinus tabulaeformis at South Margin of Tengger Desert, China. The drought reconstruction in 1691~2005 was developed by calibrating tree-ring data with the Palmer Drought Severity Index (PDSI), which is used to describe the regional moisture condition properly. The reconstruction was verified with the independent data, and accounted for 42.0% of the actual PDSI variance during their common period (1960-2005). The mean PDSI over the 1691~2005 period was estimated at -0.32. The full reconstruction indicated that the regional drought variability was variable and persistent.The comparison between the reconstructed PDSI and historical archives and other reconstructions was conducted based on tree-ring in Northwest China. The results revealed common climatic extremes and change over much of Northwest China. Many of these events have had profound impacts on human being over the past several centuries. The drought epoch in the late 1920s was the most severe one in the reconstruction.
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