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| Reconstruction of precipitation variation from tree rings in recent 1000 years in Delingha, Qinghai | |
| 作者姓名： | SHAO Xuemei HUANG Lei LIU Hongbin LIANG Eryuan FANG Xiuqi & WANG Lili . Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China . National Climate Center Beijing China . Beijing Normal University Beijing China |
| 作者单位： | SHAO Xuemei1，HUANG Lei1，LIU Hongbin2，LIANG Eryuan1，FANG Xiuqi3 & WANG Lili1 1. Institute of Geographic Sciences and Natural Resources Research，Chinese Academy of Sciences，Beijing 100101，China; 2. National Climate Center，Beijing 100081，China; 3. Beijing Normal University，Beijing 100875，China |
| 基金项目： | 国家重点基础研究发展计划(973计划)，the Key Project of Knowledge Innovation of the CAS，the National Key Project of Science and Technology |
| 摘 要： | A major attempt of the studies on past global changes (PAGES) and climate variability and predict- ability (CLIVAR) is to reconstruct climate change us- ing high-resolution proxies1―3]. Tree-ring data have played an important role in such studies. To date, tree rings have been extensively used to reconstruct tem- perature variations in the recent 1000 and even 2000 years of the Northern Hemisphere4―7], to assess the effect of volcanic eruptions on temperature varia-tions8], and to in… |
Reconstruction of precipitation variation from tree rings in recent 1000 years in Delingha, Qinghai |
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| SHAO Xuemei,HUANG Lei,LIU Hongbin,LIANG Eryuan,FANG Xiuqi & WANG Lili . Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing ,China, . National Climate Center,Beijing ,China, . Beijing Normal University,Beijing ,China.Reconstruction of precipitation variation from tree rings in recent 1000 years in Delingha, Qinghai[J].Science in China(Earth Sciences),2005,48(7). | |
| Authors: | Shao Xuemei HUANG Lei Liu Hongbin Liang Eryuan Fang Xiuqi WANG Lili |
| Institution: | 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. National Climate Center, Beijing 100081, China 3. Beijing Normal University, Beijing 100875, China |
| Abstract: | Using seven well-replicated Qilian juniper (Sabina przewalskii Kom.) ring-width chronologies developed at Zongwulong and Shalike Mts. in the northeastern part of the Qaidam Basin annual precipitation from previous July to current June in the recent 1000 years was reconstructed for Delingha. The reconstruction can capture 63.1% of precipitation variance and the equation was stable over time. For the reconstructed precipitation, wet periods occurred in AD1520--1633 and 1933--2001, whereas dry intervals in 1429--1519 and 1634--1741. In addition, the magnitude in precipitation variation was lower before 1430 with about 15 mm, but it increased to 30 mm during the period of 1430 to 1850. After 1850, the precipitation variance decreased again. In contrast to the increase in temperature, a decrease in annual precipitation was evident since the 1990s. The agreement in low-frequency variation between the reconstruction and the glacier accumulation and particulate content in Dunde ice cores during the recent several hundred years suggested that the precipitation reconstructed in this study was rather reliable,and represented a regional signal. This 1000-year reconstruction could benefit our understanding of climatic variation in decadal to century-scale in this region, and provide basic data to climate models and to prediction of future climate in the 21 st century. |
| Keywords: | northeastern part of the Qaidam Basin tree-ring width series of Qilian juniper precipitation reconstruc- tion in 1000 years |
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