| 美国西部近8000年来树木年轮重建降雨量序列中的气候突变 |
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| 引用本文： | 谷湘潜,江剑民,Roy MENDELSSOHN.美国西部近8000年来树木年轮重建降雨量序列中的气候突变[J].地理学报(英文版),2005,15(3):259-272. |
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| 作者姓名： | 谷湘潜 江剑民 Roy MENDELSSOHN |
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| 作者单位： | Pacific Fisheries Environmental Laboratory，NOAA/NMFS，Pacific Grove，CA 93950，USA，Pacific Fisheries Environmental Laboratory，NOAA/NMFS，Pacific Grove，CA 93950，USA |
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| 摘 要： | 1 IntroductionThe U niversity of A rizona Laboratory of Tree-Ring Research collected tree-ring sam ples from anum ber of long-lived trees, dating back thousands of years, from eight states in the w esternU nited States. H ughes and G raum lich (1996) pres…
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| 关 键 词： | 美国 西部地区 内华达州 树木年轮重建 降雨量序列 气候突变 森林气象 |
| 收稿时间： | 2004-12-03 |
| 修稿时间： | 3/9/2005 12:00:00 AM |
Abrupt changes in an 8000-year precipitation reconstruction for Nevada, the western USA |
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| Gu Xiangqian Ph.D.,Jiang Jianmin,Franklin Schwing,Roy Mendelssohn.Abrupt changes in an 8000-year precipitation reconstruction for Nevada, the western USA[J].Journal of Geographical Sciences,2005,15(3):259-272. |
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| Authors: | Gu Xiangqian PhD Jiang Jianmin Franklin Schwing Roy Mendelssohn |
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| Institution: | Chinese Academy of Meteorological Sciences, Beijing 100081, China;Training Centre of China Meteorological Administration, Beijing 100081, China;Joint Institute of Marine and Atmospheric Research, University of Hawaii, Honolulu,HI 96822, USA;Pacific Fisheries Environmental Laboratory, NOAA/NMFS, Pacific Grove, CA 93950;Pacific Fisheries Environmental Laboratory, NOAA/NMFS, Pacific Grove, CA 93950, USA |
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| Abstract: | A scanningt-test algorithm for detecting multiple time-scale abrupt changes in the level of a time-series was used to analyze an 8000
year time series of annual precipitation which was reconstructed from tree rings for the Nevada Climate Division 3 in the
western USA. The tree ring samples were gathered from eight states in the southwestern USA. Twenty-two change-points were
identified by the algorithm and these were used to partition the tree-ring series into twenty-three relatively Wet/Normal/Dry
episodes. These twenty-three episodes were collaborated by a coherency analysis of abrupt changes between the precipitation
reconstruction series and the TIC/δ18O records from cored sediments of Pyramid Lake in Nevada, and by comparison with published results from related studies. These
episodes were also compared with studies of the global climate change and with records of climate change in China during the
same periods. The results suggest that the precipitation reconstruction series is quite valuable for climate-change research
on multi-centurial time-scales in the western USA, and that the scanningt-test and coherency detection algorithms may have a wide use for detecting multiple time-scale abrupt changes in a long time
series.
As the TIC and δ18O record series are high resolution with unequal sampling intervals ranging between 3 and 14 years, a new algorithm was developed
to deal with the unequal time intervals in the series. |
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| Keywords: | abrupt change 8000 years precipitation reconstruction tree ring Western USA |
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