Delta O-18 records in water vapor and an ice core from the eastern Pamir Plateau: Implications for paleoclimate reconstructions
Delta O-18 records in water vapor and an ice core from the eastern Pamir Plateau: Implications for paleoclimate reconstructions
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帕米尔高原东部水蒸气和冰芯中的 delta O-18 记录：对古气候重建的影响
DOI：
10.1016/j.epsl.2016.10.001
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发表时间：
2016
影响因子：
5.3
通讯作者：
Qu Dongmei
中科院分区：
文献类型：
--
作者：
Yu Wusheng;Tian Lide;Risi Camille;Yao T;ong;Ma Yaoming;Zhao Huabiao;Zhu Haifeng;He You;Xu Baiqing;Zhang Hongbo;Qu Dongmei
这项研究首次检测了帕米尔高原东部塔什库尔干地区每日水汽中的δ18O。结果表明，在事件尺度(使用LMDZISO模式)观测和模拟的水汽/降水中δ18O值的变化主要受温度的影响。湿度、降水量和西风带、局地蒸发水汽、极地气团等不同水汽来源对δ18O值的影响较小。结合距研究区58公里的木兹塔格塔冰芯的δ18O记录和塔什库尔干地区降水δ18O的模拟年型，也表明温度，特别是西风南支流经的地区的温度，是控制δ18O变化的最重要因素。该研究区全年以西风为主，与青藏高原部分地区冬季受西风和夏季印度季风共同影响的结果有明显不同。结果表明，帕米尔高原东部是重建过去温度变化的理想地点，保存在该地区冰芯中的δ18O记录是一个合适的和稳健的温度替代。
This study is the first to examineδ18O in daily water vapor at Taxkorgan on the eastern Pamir Plateau. The results show that changes in observed and simulatedδ18O values in water vapor/precipitation at the event scale (using a LMDZ-iso model) were mainly affected by temperature. The influences of humidity, precipitation amount, and different moisture sources, such as the westerlies, local evaporated moisture, and polar air masses, onδ18O values are comparatively weak. The combination of theδ18O record from the Muztagata ice core, 58 km away from the study area, and the LMDZ-iso simulated annualδ18O pattern in precipitation at Taxkorgan also demonstrated that temperature, and particularly the temperature of the regions over which the southern branch of the westerlies flows, is the most important factor controllingδ18O variations. The results from this study area, which is dominated by the westerlies throughout the year, are markedly different from those derived from parts of the Tibetan Plateau that are dominated by the combined influences of the westerlies in winter and the Indian monsoon in summer. The results suggested that the eastern Pamir Plateau is an ideal location to reconstruct past temperature variations and that theδ18O records preserved in ice cores from the region are a suitable and robust proxy for temperature.