气候变化领域集成服务门户(CCPortal): An Examination of Temperature Trends at High Elevations Across the Tibetan Plateau: The Use of MODIS LST to Understand Patterns of Elevation-Dependent Warming

CCPortal

DOI	10.1029/2018JD029798
	An Examination of Temperature Trends at High Elevations Across the Tibetan Plateau: The Use of MODIS LST to Understand Patterns of Elevation-Dependent Warming
	Pepin, Nick; Deng, Haijun; Zhang, Hongbo; Zhang, Fan; Kang, Shichang; Yao, Tandong
发表日期	2019
ISSN	2169-897X
EISSN	2169-8996
卷号	124 期号:11
英文摘要	Research has revealed systematic changes in warming rates with elevation (EDW) in mountain regions. However, weather stations on the Tibetan plateau are mostly located at lower elevations (3,000-4,000 m) and are nonexistent above 5,000 m, leaving critical temperature changes unknown. Satellite LST (Land Surface Temperature) can fill this gap but needs calibrating against in situ air temperatures (T-air). We develop a novel statistical model to convert LST to T-air, developed at 87 high-elevation Chinese Meteorological Administration stations. T-air (daily maximum/minimum temperatures) is compared with Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua LST (1330 and 0130 local time) for 8-day composites during 2002-2017. Typically, 80-95% of the difference between LST and T-air (Delta T) is explained using predictors including LST diurnal range, morning heating/nighttime cooling rates, the number of cloud free days/nights, and season (solar angle). LST is corrected to more closely represent T-air by subtracting modeled Delta T. We validate the model using an AWS on Zhadang Glacier (5800 m). Trend analysis at the 87 stations (2002-2017) shows corrected LST trends to be similar to original T-air trends. To examine regional contrasts in EDW patterns, elevation profiles of corrected LST trends are derived for three ranges (Qilian Mountains, NyenchenTanglha, and Himalaya). There is limited EDW in the Qilian mountains. Maximum warming is observed around 4,500-5,500 m in NyenchenTanglha, consistent with snowline retreat. In common with other studies, there is stabilization of warming at very high elevations in the Himalaya, including absolute cooling above 6,000 m, but data there are compromised by frequent cloud.
关键词	land surface temperature elevation-dependent-warming mountain climate temperature trends Tibetan Plateau
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112028
作者单位	Univ Portsmouth, Dept Geog, Portsmouth, Hants, England
推荐引用方式 GB/T 7714	Pepin, Nick,Deng, Haijun,Zhang, Hongbo,et al. An Examination of Temperature Trends at High Elevations Across the Tibetan Plateau: The Use of MODIS LST to Understand Patterns of Elevation-Dependent Warming[J]. 中国科学院西北生态环境资源研究院,2019,124(11).
APA	Pepin, Nick,Deng, Haijun,Zhang, Hongbo,Zhang, Fan,Kang, Shichang,&Yao, Tandong.(2019).An Examination of Temperature Trends at High Elevations Across the Tibetan Plateau: The Use of MODIS LST to Understand Patterns of Elevation-Dependent Warming.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(11).
MLA	Pepin, Nick,et al."An Examination of Temperature Trends at High Elevations Across the Tibetan Plateau: The Use of MODIS LST to Understand Patterns of Elevation-Dependent Warming".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.11(2019).