祁连山老虎沟冰芯记录的高山区大气降水变化

doi:10.11821/dlxb201405011

地理学报 ›› 2014, Vol. 69 ›› Issue (5): 681-689.doi: 10.11821/dlxb201405011

祁连山老虎沟冰芯记录的高山区大气降水变化

秦翔¹, 崔晓庆¹, 杜文涛¹, 任贾文¹, 陈记祖^1,2

1. 中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/祁连山冰川与生态环境综合观测研究站, 兰州 730000;
2. 兰州大学资源环境学院, 兰州 730000

收稿日期:2013-06-18 修回日期:2014-01-15 出版日期:2014-05-20 发布日期:2014-07-30
作者简介:秦翔（1973-），男，博士，副研究员，从事冰川与全球变化研究。E-mail:qinxiang@lzb.ac.cn
基金资助:
国家重大科学研究计划（2013CBA01801）；国家自然科学基金（41371091，41201067，41301064）；冰冻圈科学国家重点实验室自主课题（SKLCS-ZZ-2012-01-05）

Variations of the alpine precipitation during 1960-2006 recorded in Laohugou ice core in western Qilian Mountains, China

QIN Xiang¹, CUI Xiaoqing¹, DU Wentao¹, REN Jiawen¹, CHEN Jizu^1,2

1. State Key Laboratory of Cryospheric Sciences/Qilian Mountain Glacier and Ecological Environment Research Station, CAS, Lanzhou 730000, China;
2. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China

Received:2013-06-18 Revised:2014-01-15 Online:2014-05-20 Published:2014-07-30
Supported by:
National Basic Research Program of China(973 Program), No.2013CBA01801;National Natural Science Foundation of China, No.41371091;No.41201067;No.41301064;The State Key Laboratory of Cryospheric Sciences, No.SKLCS-ZZ-2012-01-05

摘要/Abstract

摘要： 冰芯所记录的积累量是恢复高山区过去降水变化最可靠的指标。2006 年在青藏高原东北缘祁连山老虎沟12 号冰川粒雪盆海拔5040 m处钻取了的一支20.12 m的冰芯，利用其年积累量估算了1960-2006 年期间的冰川区降水量，结合2010 年实测资料，分析了这一时期降水变化特征并研究其与周边其他地区降水变化的关系。结果表明，在过去50 年中，高山冰川区降水量表现出先增加后减少的趋势。在1960-1980 年，降水量表现出明显增加趋势，1980-2006年表现出明显减小趋势。重建的冰川区降水量变化与临近低海拔区的肃北气象站降水变化有很好的一致性，二者相关系数为0.619（P < 0.001），而量级上高山区是低山区的约3 倍。祁连山老虎沟冰川区降水与周边的敦德冰芯同期的累积量、树轮重建降水、青藏高原东北部多个气象站点的实测降水，以及临近区域格点PDSI干旱指数变化对应较好。此外，近50 年来祁连山老虎沟冰川区及毗邻的青藏高原东北部地区降水变化与ENSO呈正相关关系明显，反映了该地区高海拔大气降水变化很可能受ENSO的影响。

关键词: 老虎沟, 冰川净积累量, 气候, 祁连山, 冰芯记录

Abstract: The accumulation record of ice core is one of the most reliable indicators for reconstructing precipitation changes in high mountains. A 20.12 m ice core was drilled in 2006 from the accumulation zone of Laohugou Glacier No.12 in northeast Tibetan Plateau, China. We obtained the precipitation from the ice core net accumulation during the past 50 years, and found out the relationship between ice core record and other data from surrounding sites. Results showed that during 1960-2006, the precipitation in the high mountains firstly increased and then decreased. In 1960-2006, precipitation showed a significant increasing trend, while, from 1980 to 2006 it showed a decreasing trend. Reconstruction of the precipitation changes in the glacier was consistent with the measured data from the weather station in low mountain of Subei, and the correlation coefficient was 0.619 (P < 0.001); however, the magnitude in the high mountains was three times higher than that of the low mountain. The precipitation of Laohugou Glacier No.12 corresponded well to the amount of accumulation of the Dunde ice cores in the same period, tree-ring reconstruction of precipitation, the measured data of multiple meteorological stations in the northeastern Tibetan Plateau, and the changes of adjacent PDSI drought index. Precipitation changes of Laohugou Glacier and the northeastern Tibetan Plateau had significantly positive correlation with ENSO, which reflected the regional alpine precipitation change was likely to be influenced by ENSO.

Key words: Laohugou Glacier No.12, Qilian Mountains, alpine precipitation, ice core

秦翔, 崔晓庆, 杜文涛, 任贾文, 陈记祖. 祁连山老虎沟冰芯记录的高山区大气降水变化[J]. 地理学报, 2014, 69(5): 681-689.

QIN Xiang, CUI Xiaoqing, DU Wentao, REN Jiawen, CHEN Jizu. Variations of the alpine precipitation during 1960-2006 recorded in Laohugou ice core in western Qilian Mountains, China[J]. Acta Geographica Sinica, 2014, 69(5): 681-689.

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祁连山老虎沟冰芯记录的高山区大气降水变化

Variations of the alpine precipitation during 1960-2006 recorded in Laohugou ice core in western Qilian Mountains, China

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