Changes in daily climate extremes in the eastern and central Tibetan Plateau during 1961–2005

You, Qinglong; Kang, Shichang; Aguilar, Enric; Yan, Yuping

doi:10.1029/2007jd009389

Cited by 291 publications

(280 citation statements)

References 43 publications

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“…Frauenfeld et al (2005) confirmed such warming trends on the TP during the period of 1957-2000 based on the analysis of 161 station records. Station records show statistically significant decreasing of the number of frost days and ice days and a longer growing season (You et al 2008). The temperature variation on the TP has different sub-regional regimes (Yin et al 2000).…”

Section: Surface Temperaturementioning

confidence: 99%

“…The level of Qinghai Lake, the largest lake on the TP, has fallen dramatically and it shrunk in area since the beginning of the 20th century, suggested mainly to be due to the decrease of precipitation in the catchment (Qin and Huang 1998). However, a recent study reveals that no significant trends can be found in the precipitation frequency or intensity from station observations (You et al 2008).…”

Section: Precipitationmentioning

confidence: 99%

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Recent land cover changes on the Tibetan Plateau: a review

2009

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This paper reviews the land cover changes on the Tibetan Plateau during the last 50 years partly caused by natural climate change and, more importantly, influenced by human activities. Recent warming trends on the plateau directly influence the permafrost and snow melting and will impact on the local ecosystem greatly. Human activities increased rapidly on the plateau during the last half century and have significant impacts on land use. Significant land cover changes on the Tibetan Plateau include permafrost and grassland degradation, urbanization, deforestation and desertification. These changes not only impact on local climate and environment, but also have important hydrological implications for the rivers which originate from the plateau. The most noticeable disasters include the flooding at the upper reaches of Yangtze River and droughts along the middle and lower reaches of Yellow River. Future possible land cover changes under future global climate warming are important but hard to assess due to the deficits of global climate model in this topographically complex area. Integrated investigation of climate and ecosystems, including human-beings, are highly recommended for future studies.

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Section: Surface Temperaturementioning

confidence: 99%

Section: Precipitationmentioning

confidence: 99%

Recent land cover changes on the Tibetan Plateau: a review

2009

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“…In China, trends in extreme precipitation have been documented in several studies, which showed that the occurrence of precipitation extremes increases at the national scale and exhibits apparent regional differences Liu et al, 2014;Liu et al, 2013;Qian et al, 2007;Su et al, 2008;Wan et al, 2013;Wang et al, 2013;Wang et al, 2008;Yang et al, 2008;You et al, 2008;Zhai et al, 1999;Zhang et al, 2011a). For example, Qian et al (2007) found that the frequencies of extreme rain events increased in eastern China centered on the middle-lower reaches of the Yangtze River but decreased in North China and Southwest China.…”

Section: Introductionmentioning

confidence: 99%

“…Extreme climate indices were spatially distributed with obvious gradients from the southeast to the northwest on the Loess Plateau of China during 1961-2007. Most precipitation indices exhibit increases in the southern and northern Tibetan Plateau and show decreases in the central Tibetan Plateau during 1961(You et al, 2008.…”

Section: Introductionmentioning

confidence: 99%

Recent changes in extreme precipitation and drought over the Songhua River Basin, China, during 1960–2013

Song

Sun

et al. 2015

Atmospheric Research

148

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Based on ten indices of extreme precipitation and one drought index (composite index, CI), the trends in extreme events were investigated using a Mann-Kendall non-parametric method at 39 stations in the Songhua River Basin (SHB) during 1960-2013. The regionally averaged wet-day precipitation (PRCPTOT) increased at a rate of 1.65 mm/year (R 2 = 0.28, P = 0.13), in which 82% of the stations experienced increases, but only 4 stations showed significant positive trends. The annual R95 and R99 exhibited slight upward trends at rates of 1.37 (R 2 = 0.21, P = 0.27) and 1.28 mm/year (R 2 = 0.23, P = 0.23) over the last 54 years; however, there were not significant trends in R95 and R99 at the 0.05 level. PRCPTOT, R95 and R99 showed similar spatial trends, in which positive trends mainly occurred in the northern and southeastern basins. The trends in the maximum 1-day precipitation (RX1day) and maximum 5-day precipitation (RX5day) do not show a prevalent trend (approximately 50% of the stations have a positive trend and the remaining stations have a negative trend). The simple daily intensity index (SDII) significantly decreased at an annual rate of 0.02 mm/d during 1960-2013 (R 2 = 0.66, P b 0.01); spatially, 49% of the stations experienced statistically significant decreases at the 0.05 level based on the Mann-Kendall non-parametric test. The regionally averaged heavy (R10mm) and very heavy precipitation days (R20mm) and consecutive wet days (CWD) showed no significant trends during the past 54 years; however, several individual extreme precipitation events, such as the flood of 1998 in the SHB, were well detected by these indices. The regionally averaged consecutive dry days (CDD) significantly increased (R 2 = 0.79, P b 0.01) at a rate of 0.22 days/year from 1960 to 2013. All of the stations exhibited statistically significant increases in CDD, excluding the Tongyu station in the western basin. The monthly RX5day values were highest in summer, from June to August, in the SHB; a peak occurred in July (67.5 mm) in the SHB during 1960-2013. The CI peaked in July, with the highest value of 0.2 in the SHB during 1960-2013. However, the two lowest CI values occurred in spring and fall, with values of −0.56 and −0.41, respectively. During April and May, when most of the spring drought events occur, a prevalent trend does not exist; moreover, almost no stations have statistically significant CI increases. In August and September, respectively 79% and 97% of the stations exhibited a CI negative trend, but only 2 and 6 stations showed significant decreases at the 0.05 level. The increasing extreme climate events present a challenge for local water resources management.

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“…The extreme precipitation and its ratio to mean precipitation have also enhanced remarkably in a large area of China, particularly in Northwestern and Eastern China (Zhai et al 2005;Bai et al 2007;Feng et al 2007;Wang et al 2012;Sun and Ao 2013;Wu et al 2015;Zhou et al 2016). Meanwhile, a decrease in rainy days has been observed over most regions (Zhai et al 1999(Zhai et al , 2005Liu et al 2005;Qian et al 2007;You et al 2008;Zhou et al 2016). …”

Section: Introductionmentioning

confidence: 94%

Trends in autumn rain of West China from 1961 to 2014

Zhang

Wang

Zhou

et al. 2018

Theor Appl Climatol

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Autumn rain of West China is a typical climate phenomenon, which is characterized by continuous rainy days and large rainfall amounts and exerts profound impacts on the economic society. Based on daily precipitation data from 524 observation stations for the period of 1961-2014, this article comprehensively examined secular changes in autumn rain of West China, including its amount, frequency, intensity, and associated extremes. The results generally show a significant reduction of rainfall amount and rainy days and a significant enhancement of mean rainfall intensity for the average of West China during autumn (SeptemberOctober) since 1961. Meanwhile, decreasing trends are consistently observed in the maximum daily rainfall, the longest consecutive rainy days, the greatest consecutive rainfall amount, and the frequencies of the extreme daily rainfall, consecutive rainfall, and consecutive rainfall process. Further analysis indicates that the decreases of autumn rainfall and related extremes in West China are associated with the decreases in both water vapor content and atmospheric unstable stratification during the past decades. On the regional scale, some differences exist in the changes of autumn rainfall between the eastern and western parts of West China. Besides, it is found that the autumn rainy season tends to start later and terminate earlier particularly in eastern West China.

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Changes in daily climate extremes in the eastern and central Tibetan Plateau during 1961–2005

Cited by 291 publications

References 43 publications

Recent land cover changes on the Tibetan Plateau: a review

Recent land cover changes on the Tibetan Plateau: a review

Recent changes in extreme precipitation and drought over the Songhua River Basin, China, during 1960–2013

Trends in autumn rain of West China from 1961 to 2014

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