Spatiotemporal variations of aridity in China during 1961–2015: decomposition and attribution

Liu, Chang; Huang, Wei; Feng, Song; Chen, Jianhui; Zhou, Aifeng

doi:10.1016/j.scib.2018.07.007

Cited by 31 publications

(13 citation statements)

References 64 publications

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“…These regions are also characterized by very complex hydrological systems due to high variability in precipitation, which often exhibits extreme behaviors, such as flash floods caused by extreme precipitation and extended droughts due to a prolonged dry spell (Buytaert et al, 2012). The droughts are projected to become more frequent and severe in arid regions due to an increase in aridity (Nam et al, 2015), as reported in Iran , Serbia (Hrnjak et al, 2014), Turkey (Selek et al, 2018), Iraq (Şarlak and Agha, 2018), India (Ramarao et al, 2018) and China (Liu et al, 2018a), among others. Climate models projected an increase in the range of 11 % to 23 % by 2100 in global arid and semiarid climate area, which will expand aridification in different parts of the globe (Huang et al, 2016).…”

Section: Introductionmentioning

confidence: 95%

Spatiotemporal changes in aridity of Pakistan during 1901–2016

Ahmed

Shahid

Wang

et al. 2019

Hydrol. Earth Syst. Sci.

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Abstract. The changing characteristics of aridity over a larger spatiotemporal scale have gained interest in recent years due to climate change. The long-term (1901–2016) changes in spatiotemporal patterns of annual and seasonal aridity during two major crop growing seasons of Pakistan, Kharif and Rabi, are evaluated in this study using gridded precipitation and potential evapotranspiration (PET) data. The UNESCO aridity index was used to estimate aridity at each grid point for all the years between 1901 and 2016. The temporal changes in aridity and its associations with precipitation and PET are evaluated by implementing a moving window of 50 years of data with an 11-year interval. The modified Mann–Kendall (MMK) trend test is applied to estimate unidirectional change by eliminating the effect of natural variability of climate, and Pettitt's test is used to detect year of change in aridity. The results revealed that the climate over 60 % of Pakistan (mainly in southern parts) is arid. The spatial patterns of aridity trends show a strong influence of the changes in precipitation on the aridity trend. The increasing trend in aridity (drier) is noticed in the southwest, where precipitation is low during Kharif, while there is a decreasing trend (wetter) in the Rabi season in the region which receives high precipitation due to western disturbances. The annual and Kharif aridity is found to decrease (wetter) at a rate of 0.0001 to 0.0002 per year in the northeast, while Kharif and Rabi aridity are found to increase (drier) at some locations in the south at a rate of −0.0019 to −0.0001 per year. The spatial patterns of aridity changes show a shift from arid to the semi-arid (wetter) climate in annual and Kharif over a large area while showing a shift from arid to hyper-arid (drier) region during Rabi in a small area. Most of the significant changes in precipitation and aridity are observed in the years between 1971 and 1980. Overall, aridity is found to increase (drier) in 0.52 %, 4.44 % and 0.52 % of the area and decrease (wetter) in 11.75 %, 7.57 % and 9.66 % of the area for annual, Rabi and Kharif seasons respectively during 1967–2016 relative to 1901–1950.

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Section: Introductionmentioning

confidence: 95%

Spatiotemporal changes in aridity of Pakistan during 1901–2016

Ahmed

Shahid

Wang

et al. 2019

Hydrol. Earth Syst. Sci.

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show abstract

“…Thus the fragility of its ecosystems makes the region highly sensitive to climate change [14]. Numerous wetlands ecosystems in the region have sustained dramatic and unidirectional regime shifts within hundreds of years, and climate change is a major factor affecting regional hydrology, vegetation, ecology, and sustainable development [15]. In order to evaluate the impact of future climate change on the ecological environment of northern China, an important step is to further develop the use of paleoecological indicators such cladocerans to understand the impact of past climate change on the lake ecosystems of the region.…”

Section: News and Viewsmentioning

confidence: 99%

A rapid late Holocene lake ecosystem shift driven by climate change: evidence from the first cladoceran record from an alpine lake in northern China

Liu

Chen

et al. 2020

Science Bulletin

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“…However, the soil is easily displaced under external forces such as water, wind, and gravity, forming soil erosion [4]. With the effects of climate change and human activities, soil erosion is becoming increasingly prevalent worldwide, especially in areas that are ecologically fragile and rapidly urbanized [5][6][7][8][9][10]. It is estimated that the natural (geological) soil erosion rate is 0.173 mm a À1 , but it can be as high as 3.939 mm a À1 in conventional agriculture [11].…”

Section: Introductionmentioning

confidence: 99%