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Open AccessArticle

No Significant Shift of Warming Trend over the Last Two Decades on the Mid-South of Tibetan Plateau

1
Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
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CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China
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Institute of Tibetan Plateau and Polar Meteorology, Chinese Academy of Meteorological Sciences, Beijing 100081, China
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International Institute for Earth System Science, Nanjing University, Nanjing 210093, China
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Key Lab of Poyang Lake Wetland and Watershed Research of Ministry of Education and School of Geography and Environment, Jiangxi Normal University, Nanchang 330028, China
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(7), 416; https://doi.org/10.3390/atmos10070416
Received: 12 May 2019 / Revised: 11 July 2019 / Accepted: 17 July 2019 / Published: 19 July 2019
Climate warming on the Tibetan Plateau has been regarded as an important driving force of regional environmental change. Although several studies have analyzed the shift of warming trends on this plateau within the context of a recent global warming “hiatus” since 1998, their disparate findings have hindered a comprehensive and regional understanding. Based on the daily mean temperature (Tmean), maximum temperature (Tmax), and minimum temperature (Tmin) collected from meteorological stations on the period of 1961–2017, we re-examined the timing and magnitude of temperature phase change using piecewise linear regression on the mid-south of Tibetan Plateau. The results show that among the trends in regional annual Tmean, Tmax and Tmin, the statistically significant change-point was observed only in annual Tmax (p < 0.01). The warming trend of annual Tmax has accelerated significantly since 1992 and has exceeded that of annual Tmin after 2000, causing a remarkable reversal from decline to increase in diurnal temperature range (DTR) (p < 0.01). Spatially, the occurrence time of change-points in Tmean, Tmax, and Tmin varied among stations, but most of them occurred before the mid-1990s. Besides, the trend shifts in Tmax/DTR during the cold season played a primary role in the significant trend shifts in annual Tmax/DTR. This study underscores that there is no significant shift of warming trends over the last two decades on the mid-south of Tibetan Plateau. View Full-Text
Keywords: climate warming; diurnal temperature range; change-point analysis; Tibetan Plateau climate warming; diurnal temperature range; change-point analysis; Tibetan Plateau
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Li, L.; Zhang, Y.; Qi, W.; Wang, Z.; Liu, Y.; Ding, M. No Significant Shift of Warming Trend over the Last Two Decades on the Mid-South of Tibetan Plateau. Atmosphere 2019, 10, 416.

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