Arid–humid variations in the summer climate and their influence mechanism in Asian monsoon margin of Northwest China during 1960–2010: A case study in the Alashan Plateau

Li, Zhuolun; Wei, Minghua; Zhou, Jinyan; Tian, Xiaolei

doi:10.1002/joc.6599

Cited by 18 publications

(6 citation statements)

References 65 publications

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“…Located within continental Eurasia, ARNC comprises Xinjiang Province, the Hexi Corridor (Gansu Province), the Qaidam Basin (Qinghai Province), and the Alashan Plateau (Inner Mongolia) (Figure 1). Although mid-latitude westerlies mainly dominate ARNC, the climate of easternmost ARNC is interactively affected by the westerlies and the East Asian summer monsoon (EASM) (Li et al, 2020). Owing to the long distance from oceans, the presence of many high mountain ranges such as (from north to south) the Altai, Tianshan, Qilian, and Kunlun Mountains, and the adjacent Qinghai-Tibet Plateau, moisture flow over ARNC is strongly blocked, resulting in mean annual precipitation amount of <200 mm in ARNC (Chen et al, 2014;Wang Y. et al, 2017).…”

Section: Study Areamentioning

confidence: 99%

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Spatiotemporal Pattern of Occurrence Time of Extreme Precipitation and Circulation Mechanisms in the Arid Region of Northwest China

et al. 2022

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Investigation of extreme precipitation events in arid and semiarid regions, especially for occurrence time and the associated circulation mechanisms, is vital to support the forecasting of and the advanced response to resultant disasters. In this study, the spatiotemporal pattern of occurrence time of extreme precipitation and atmospheric circulation mechanisms in the Arid Region of Northwest China (ARNC) were analyzed using two indicators (precipitation concentration degree and period) and the climate diagnosis method. Results showed that the significant scattered pattern of extreme precipitation occurrence time (EPOT) in Northern Xinjiang and the postponed pattern of maximum extreme precipitation occurrence (MEPO) from southern to northern Xinjiang are consistent with the input pathway of the Arctic air mass. During the anomaly dispersion year of EPOT and the anomaly delay year of MEPO, the Arctic air mass carried sufficient water vapor is transported to ARNC for triggering extreme precipitation events. Meanwhile, the pattern of concentration–dispersion–concentration in eastern ARNC demonstrates interaction between the westerlies and the summer monsoon. Sufficient water vapor is transported to southwestern ARNC by the southwest monsoon during the anomaly delay year of MEPO and the anomaly concentration year of EPOT. The findings of this study suggest that invasion of the Arctic air mass and the summer monsoon could influence extreme precipitation in ARNC.

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Section: Study Areamentioning

confidence: 99%

“…Further east, extreme precipitation is interacted by the westerlies and the summer monsoon (Li et al, 2015;Du et al, 2020). In summer, blocked by the Tianshan and Altai mountains, EASM provides abundant water vapor and causes precipitation over the eastern Alashan Plateau (Li et al, 2020).…”

Section: Spatial Pattern Of Extreme Precipitation Occurrence Timementioning

confidence: 99%

Spatiotemporal Pattern of Occurrence Time of Extreme Precipitation and Circulation Mechanisms in the Arid Region of Northwest China

et al. 2022

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“…The study area is located in the Asian monsoon margin of NW China (Li et al, 2020a). In this region, precipitation and effective moisture changes at the millennial scale during the Holocene differed from those observed in the typical monsoon region (Li et al, 2015b;Gao et al, 2020aGao et al, , 2020b.…”

Section: Mechanisms Possibly Forcing Climate Changesmentioning

confidence: 99%

“…1), covering an area of 52,100 km 2 with an elevation of 900–1500 m (Zhu et al, 2010). It is characterized by a strong continental climate (Xu and Li, 2016; Li et al, 2020a). In this desert area, the mean annual temperature ranges from 8.8°C to 9°C (Li et al, 2018).…”

Section: Study Areamentioning

confidence: 99%

Holocene climate background for lake evolution in the Badain Jaran Desert of northwestern China revealed by proxies from calcareous root tubes

Dong

et al. 2022

Quat. res.

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It has been unclear whether Holocene lake evolution in the Badain Jaran Desert of northwestern China, an area in which lakes are mainly recharged by groundwater, responded to climate change. In this study, we analyzed the Mg/Ca ratio and phytolith assemblages from 10 Holocene calcareous root tube samples from the desert to reconstruct changes in effective moisture and mean annual precipitation (MAP) at the millennial scale during the Holocene and to explore the factors affecting lake evolution. Our results revealed that the effective moisture at 7000–5000 cal yr BP was higher than that of 5000–2000 cal yr BP. Similarly, the MAP was higher at 7000–5000 cal yr BP (175 ± 37 to 205 ± 37 mm) than at 5000–2000 cal yr BP (145 ± 37 to 165 ± 39 mm). The expansion of the lakes during the Early Holocene would have resulted from the input of groundwater from the meltwater in the recharge area. High lake levels in the Middle Holocene corresponded to increased monsoonal precipitation and groundwater recharge. The gradual decline of lake levels in the Late Holocene indicated a relatively arid climate with decreased monsoonal precipitation and groundwater recharge.

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“…Droughts, especially meteorological droughts, indicate precipitation shortfalls and are usually associated with certain atmospheric circulations (Huang et al., 2016; Li et al., 2020; Zhou et al., 2016). Some studies have demonstrated that the variability in drought in northern China is mainly impacted by the intensity of westerly winds and the East Asian monsoon (Zhang et al., 2007, 2016), and the semiarid zones of China, a large area from northeast to southwest, become wetter (drier) when the East Asian summer monsoon is stronger (weaker) (Zhang et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Interannual Variability in August Drought in Northern China and the Corresponding Climate Shift

2021

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Recent extreme weather and climate events, such as droughts, floods, and heat waves, have caused significant impacts on ecosystems and human well-being (Field et al., 2014). Drought is a major natural disaster that causes tremendous losses to both economic and agricultural development worldwide (Field et al., 2014). From 1998 to 2017, droughts influenced approximately 1.5 billion people, accounting for one-third of all-natural disaster impacts (Funk et al., 2019). China has suffered from water shortage issues in the past, especially in northern China (Chen & Sun, 2015;Jiang, 2009), which has a dense population and is a major agricultural and industrial sector. In addition, drought disasters in northern China exert serious impacts on the economy, environment, and local water crisis (Ma & Fu, 2006). For example, a severe drought occurred in northern China in 2017 that led to large areas of crop damage. In 2014, the Xinjiang Uygur Autonomous Region, which is located in northwestern China, frequently experienced severe weather and climate events, and drought disasters accounted for the largest proportion (approximately 38%) of all-natural disasters, causing direct economic losses of nearly 2.9 billion yuan. It is of great significance to investigate the variations in drought in northern China and the underlying mechanisms, which may help with drought prediction and disaster reduction.According to climatic and hydrological records, the climate in northwestern China changed from warm-dry to warm-wet around the late 1980s (Chen et al., 2012;Shi et al., 2003). It has been claimed that both temperature and precipitation have displayed positive tendencies in recent decades, and warmer and wetter conditions have been observed in northwestern China (

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Arid–humid variations in the summer climate and their influence mechanism in Asian monsoon margin of Northwest China during 1960–2010: A case study in the Alashan Plateau

Cited by 18 publications

References 65 publications

Spatiotemporal Pattern of Occurrence Time of Extreme Precipitation and Circulation Mechanisms in the Arid Region of Northwest China

Spatiotemporal Pattern of Occurrence Time of Extreme Precipitation and Circulation Mechanisms in the Arid Region of Northwest China

Holocene climate background for lake evolution in the Badain Jaran Desert of northwestern China revealed by proxies from calcareous root tubes

Interannual Variability in August Drought in Northern China and the Corresponding Climate Shift

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