کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5113540 | 1377938 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature variations since 1750 CE inferred from an alpine lake in the southeastern margin of the Tibetan Plateau
ترجمه فارسی عنوان
تغییرات دما از سال 1750 میلادی به دست آمده از دریاچه کوهستانی در حاشیه جنوب شرقی فلات تبتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
High-altitude regions are thought to be very sensitive to global climate change, especially under current global warming. However, due to the lack of paleoclimate archives such as ice core and tree-rings above the modern tree line, limited paleoclimate data have been extracted to extend instrumental data over the past few centuries, which will help understand the interannual-to decadal-scale climate variability in high-altitude regions. Here we present a high-resolution (1-6 yr) quantitative temperature record from a remote alpine lake at the southeastern margin of the Tibetan Plateau, by applying a novel proxy based on branched glycerol dialkyl glycerol tetraethers (brGDGTs). Contrary to the often-documented warming trend over the past few centuries, but consistent with temperature record from the northern Tibetan Plateau, our data show a gradual decreasing trend of 0.3 °C in mean annual air temperature from 1750 to 1970 CE. This result suggests a gradual cooling trend in some high altitude regions over this interval, which could provide a new explanation for the observed decreasing Asian summer monsoon. In addition, our data indicate an abruptly increased interannual-to decadal-scale temperature variations of 0.8-2.2 °C after 1970 CE, in terms of both magnitude and frequency, indicating that the climate system in high altitude regions would become more unstable under current global warming.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary International - Volume 436, Part A, 29 April 2017, Pages 37-44
Journal: Quaternary International - Volume 436, Part A, 29 April 2017, Pages 37-44
نویسندگان
Jingjing Li, Lingyang Kong, Huan Yang, Qian Wang, Xiangdong Yang, Ji Shen, Cheng Zhao,