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Consistent long‐term Holocene warming trend at different elevations in the Altai Mountains in arid central Asia
Journal of Quaternary Science ( IF 1.9 ) Pub Date : 2020-10-14 , DOI: 10.1002/jqs.3254 Zhiguo Rao 1 , Haichun Guo 1 , Jiantao Cao 2 , Fuxi Shi 3 , Guodong Jia 2 , Yunxia Li 1 , Fahu Chen 4
Journal of Quaternary Science ( IF 1.9 ) Pub Date : 2020-10-14 , DOI: 10.1002/jqs.3254 Zhiguo Rao 1 , Haichun Guo 1 , Jiantao Cao 2 , Fuxi Shi 3 , Guodong Jia 2 , Yunxia Li 1 , Fahu Chen 4
Affiliation
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Recent results indicate contrasting Holocene moisture histories at different elevations in arid central Asia (ACA). However, relatively little is known about Holocene temperature changes at different elevations. Here we report an independently dated peat brGDGTs‐based MBT'5ME record from the Narenxia peatland (NRX) in the southern Altai Mountains. The record suggests a long‐term warming trend since ~7.7 cal. kyr bp, with a warmer stage during ~7–5.5 cal. kyr bp, a cold stage during ~5.5–4 cal. kyr bp, and a warming trend over the last ~4 kyr. The long‐term warming trend indicated by the NRX MBT'5ME record is largely consistent with Holocene temperature records from nearby sites covering an altitudinal range of ~1700–4100 m above sea level. This consistent long‐term warming trend at different elevations differs from the long‐term Holocene drying/wetting trends at high/low elevations of the Altai Mountains. We propose that the warming trend and consequent permafrost thawing at high elevations could have resulted in increased meltwater runoff, which would have contributed to the long‐term wetting trend at low elevations. Our findings potentially provide an improved understanding of regional climate change and associated water resource availability, with implications for their possible future status.
中文翻译：
中亚干旱地区阿尔泰山不同海拔高度长期一致的全新世变暖趋势
最新结果表明，干旱中亚（ACA）不同海拔的全新世水分历史形成了鲜明对比。但是，关于全新世在不同高度的温度变化的了解相对较少。在这里，我们报告了来自阿尔泰山南部纳伦夏泥炭地（NRX）的基于日期独立的泥炭brGDGTs的MBT'5ME记录。该记录表明自7.7摄氏度以来长期变暖的趋势。kyr bp，在〜7–5.5 cal期间处于较暖的阶段。kyr bp，约5.5-4 cal的寒冷阶段。基尔bp，并且在过去约4年中呈变暖趋势。NRX MBT的5ME表示长期变暖趋势该记录与附近地点全新世的温度记录基本一致，该海拔范围海拔约1700-4100 m。在不同海拔高度的这种一致的长期变暖趋势与在阿尔泰山脉高海拔/低海拔的长期全新世干燥/湿润趋势不同。我们认为，高海拔地区的变暖趋势和随之而来的永久冻土融化可能会导致融水径流增加，这可能有助于低海拔地区的长期润湿趋势。我们的发现可能会更好地了解区域气候变化和相关的水资源可用性，并对其未来可能的状况产生影响。
更新日期：2020-10-30
中文翻译：
中亚干旱地区阿尔泰山不同海拔高度长期一致的全新世变暖趋势
最新结果表明，干旱中亚（ACA）不同海拔的全新世水分历史形成了鲜明对比。但是，关于全新世在不同高度的温度变化的了解相对较少。在这里，我们报告了来自阿尔泰山南部纳伦夏泥炭地（NRX）的基于日期独立的泥炭brGDGTs的MBT'5ME记录。该记录表明自7.7摄氏度以来长期变暖的趋势。kyr bp，在〜7–5.5 cal期间处于较暖的阶段。kyr bp，约5.5-4 cal的寒冷阶段。基尔bp，并且在过去约4年中呈变暖趋势。NRX MBT的5ME表示长期变暖趋势该记录与附近地点全新世的温度记录基本一致，该海拔范围海拔约1700-4100 m。在不同海拔高度的这种一致的长期变暖趋势与在阿尔泰山脉高海拔/低海拔的长期全新世干燥/湿润趋势不同。我们认为，高海拔地区的变暖趋势和随之而来的永久冻土融化可能会导致融水径流增加，这可能有助于低海拔地区的长期润湿趋势。我们的发现可能会更好地了解区域气候变化和相关的水资源可用性，并对其未来可能的状况产生影响。
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