Cluster analysis on summer precipitation field over Qinghai-Tibet Plateau from 1961 to 2004

Lu, Siqi; Shao, Quanqin; Liu, Jiyuan; Wang, Junbang; Chen, Shenbin; Chen, Zhuoqi

doi:10.1007/s11442-008-0295-y

Cited by 17 publications

(10 citation statements)

References 6 publications

(4 reference statements)

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“…Understanding the precipitation variability in the YTR basin, and its potential impacts on water management and control of water disasters, is vital for the sustainable development of Tibet. Many studies have analyzed precipitation variability in the YTR basin by considering its linear trends [ Zhang et al ., ; Xu et al ., ; Lu et al ., ]. However, they did not evaluate the nonstationary and nonlinear variability of precipitation and did not clarify the spatial difference in precipitation variability either.…”

Section: Introductionmentioning

confidence: 99%

Precipitation variability and response to changing climatic condition in the Yarlung Tsangpo River basin, China

et al. 2016

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Hydroclimatic process in the Yarlung Tsangpo River (YTR) basin, a sensitive area to climate change, is obviously changing during recent years, but there has limited understanding about it. In this study, we investigated the spatiotemporal variation of precipitation over last four decades in the basin and the impact thereon of the changing Indian summer monsoon at interannual and decadal time scales. All the precipitation series have similar scaling behavior, reflecting similar climatic regime throughout the basin. However, the effect of the Indian monsoon strengthens from the downstream to upstream, causing spatial variability in the seasonal distribution of precipitation, and on this basis, the YTR basin is roughly divided into three regions: east, middle, and west. Both the occurrence times and magnitude of precipitation extremes, ranging 25–50 mm/d, are exhibiting downward trends over the last four decades, which bodes well for water disaster controls in the basin. The Indian summer monsoon index, as an intensity indicator for the Indian summer monsoon, shows a positive relationship with the summer precipitation in the YTR basin. Periodic variability of the Indian monsoon determines the interannual nonstationary fluctuations of precipitation. Especially, the weakening effect of the Indian summer monsoon has caused an obvious decrease in precipitation over the rainy season after 1998. If the Indian summer monsoon keeps weakening, the precipitation would decrease and potentially water shortage would become more severe in the basin. Effective adaptation strategy should therefore be developed proactively to handle the unfavorable water situation, which is likely to occur in the future.

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Section: Introductionmentioning

confidence: 99%

Precipitation variability and response to changing climatic condition in the Yarlung Tsangpo River basin, China

et al. 2016

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“…The western area of Sichuan Province, which lies in the southeast portion of the Tibet Autonomous Region, showed the most significant increase in precipitation. Research by Lu et al (2008) has shown that the summer precipitation tendencies at stations differed from 1961 to 2004 over the TP. Most of the stations with increases were located in the southern and northeastern plateau.…”

Section: Introductionmentioning

confidence: 99%

Temporal and spatial variability in precipitation trends in the Southeast Tibetan Plateau during 1961–2012

Zhang¹,

Wang²,

Zhang³

et al. 2015

Preprint

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Abstract. Using the monthly precipitation data at 14 stations from 1961 to 2012, the precipitation trends at the seasonal and annual scales are analyzed using the Mann–Kendall test in the Southeast Tibetan Plateau (STP). The area-averaged precipitation shows an increasing trend in the STP with strong temporal and spatial variations. The seasonal and annual precipitation increased, except in the summer; the annual precipitation increased by about one millimeter pre year over the last 52 years. The spring precipitation significantly increased at the 99% confidence level, while the mean summer precipitation insignificantly decreased at the 95% confidence level. The extreme precipitation, including the maxima and minima, also experienced overall increases. More than 78% of the stations exhibited increases in the annual precipitation (93% in spring). The precipitation variation with elevation was not obvious, but the variation with complex topography was obvious in the STP. The largest precipitation increases and decreases occurred in high-precipitation areas, while the increasing precipitation was dominant in or near the main area of the Tibetan Plateau (TP). The results of this study reveal the spatio-temporal variability in the precipitation trends in the STP for the first time. The results are beneficial for understanding the local climate characteristics in the STP and in the entire TP.

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“…The response relation between the climate change and the TP is one of the most important focuses of climatic change research at present Immerzeel et al, 2010;Biermann et al, 2014 . Some previous researches have revealed climatic changes of the TP based on precipitation, temperature, energy exchange and so on Liu and Chen, 2000;Xu et al, 2008;Tang et al, 2011;Lu et al, 2012;Wang, 2018 . However, the existing studies have also shown regional contrast in climate variations over the TP Lu et al, 2008;Li, 2011;Salama et al, 2012;Wang, 2018 .…”

Section: Introductionmentioning

confidence: 99%

“…Some previous researches have revealed climatic changes of the TP based on precipitation, temperature, energy exchange and so on Liu and Chen, 2000;Xu et al, 2008;Tang et al, 2011;Lu et al, 2012;Wang, 2018 . However, the existing studies have also shown regional contrast in climate variations over the TP Lu et al, 2008;Li, 2011;Salama et al, 2012;Wang, 2018 . It is very important to study the local climate change characteristics in the TP, such as precipitation days PDs tendencies in the southeast TP STP .…”

Section: Introductionmentioning

confidence: 99%

Long-term trend of precipitation days for southeast Tibetan Plateau, China

Zhang

Shun-jiu

2020

J. Agric. Meteorol.

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In this paper, the spatiotemporal trend variability of precipitation days PDs in the southeast Tibetan Plateau STP from 1961 to 2012 is studied on annual and seasonal timescales for the first time. According to the results of the Mann-Kendall M-K test, the annual and seasonal area-averaged PDs shows a non-significant tendency except for spring PDs, and the spring PDs shows a significantly increased trend at 95 confidence level during this period. The increase is 6.85 days per 100 years in annual PDs. The maximal increase occurs in spring, which is 7.13 days per 100 years. On the other hand, the PDs and their tendencies have notable spatial distribution variations over the STP. The PDs have some relationship with altitude, but their tendencies are unrelated to altitude in the STP. This study further finds that the Nujiang River is a dividing line for the PDs, and latitude 30 N is such a line for the PDs tendency. The results revealed the local differences of the PDs over the Tibetan Plateau TP , which is beneficial to understand the variations in precipitation patterns in the STP and gain insights into the change features of the TP under global changes.

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Cluster analysis on summer precipitation field over Qinghai-Tibet Plateau from 1961 to 2004

Cited by 17 publications

References 6 publications

Precipitation variability and response to changing climatic condition in the Yarlung Tsangpo River basin, China

Precipitation variability and response to changing climatic condition in the Yarlung Tsangpo River basin, China

Temporal and spatial variability in precipitation trends in the Southeast Tibetan Plateau during 1961–2012

Long-term trend of precipitation days for southeast Tibetan Plateau, China

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