Precipitation stable isotope composition, moisture sources, and controlling factors in Xi'an, Northwest China

Xie, Chunyi; Zhao, Liang; Eastoe, Christopher J.; Liu, Xiaohong; Wang, Ninglian; Zhang, Zihan; Dong, Xiying; Liu, Huan

doi:10.1016/j.atmosres.2022.106428

Cited by 11 publications

(5 citation statements)

References 78 publications

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“…6). The slopes and the intercepts of both years are higher than the local meteoric water line δD = 7.5 × δ 18 O + 7.4 (n = 168, r = 0.97) in precipitation data of monsoon season from 2016 to 2020 in Xi'an 40 , indicating that the moisture recycling or moisture source change may cause the variations of our eventbased samples. Deviations of the Local Meteoric Water Line in the Mid-WCAP from the Global Meteoric Water Line (δD = 8 × δ 18 O + 10) 9 are contingent upon factors such as condensation temperature, moisture source, transport path, and changes in climatic conditions 69 .…”

Section: Articlementioning

confidence: 76%

“…1). Located near the northwestern edge of the summer monsoon 39,40 , the climatic patterns of the study site are predominantly controlled by the summer monsoon in summer and the westerly in non-monsoon seasons 41,42 . Annual precipitation amount ranges from 500 to 700 mm, mostly occurring between July and October 43 .…”

Section: Materials and Climatologymentioning

confidence: 99%

“…Annual precipitation amount ranges from 500 to 700 mm, mostly occurring between July and October 43 . Further precipitation may occur during November in some years following WCAP 40,43 . The mean annual temperature is 13.5 °C, with winter being dry and cold, and summer characterized by hot and rainy conditions 40 .…”

Section: Materials and Climatologymentioning

confidence: 99%

“…Further precipitation may occur during November in some years following WCAP 40,43 . The mean annual temperature is 13.5 °C, with winter being dry and cold, and summer characterized by hot and rainy conditions 40 . In addition, a previous study 40 indicates that the temporal variation of δ 18 O values in Xi'an precipitation displays an evident annual pattern: the highest values were observed between April and June, decreased throughout the monsoon season to reach their lowest values between July and October, and then increased again from November to April.…”

Section: Materials and Climatologymentioning

confidence: 99%

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Triple oxygen isotope compositions reveal transitions in the moisture source of West China Autumn Precipitation

Sha,

Tian,

Sha

et al. 2024

Commun Earth Environ

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The isotopic composition has long been used to investigate the factors influencing precipitation, whereas the variations of event-based precipitation isotopes caused by moisture transition and synoptic meteorological conditions remain limited. Here we present triple oxygen and hydrogen isotopes in event-based precipitation during West China Autumn Precipitation to evaluate the influence of various moisture sources in the hydrological process. Isotopes δ18O, δ17O, and δD peak with convective precipitation at the onset stage, then drop to their lowest amid stratiform precipitation during the middle stage, and rise again towards the end. In contrast, Δ′17O levels remain elevated throughout the mid-stage of West China Autumn Precipitation compared to the onset and end stages. These isotopic variations, coupled with moisture analysis, reveal a distinct moisture source transition from the West Pacific Ocean to the westerly domain during West China Autumn Precipitation accompanied by the retreat of the Asian summer monsoon from Northwest China.

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Section: Articlementioning

confidence: 76%

Section: Materials and Climatologymentioning

confidence: 99%

Section: Materials and Climatologymentioning

confidence: 99%

Section: Materials and Climatologymentioning

confidence: 99%

See 2 more Smart Citations

Triple oxygen isotope compositions reveal transitions in the moisture source of West China Autumn Precipitation

Sha,

Tian,

Sha

et al. 2024

Commun Earth Environ

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“…Xi'an is a provincial capital city in western China with a developed economy and culture. The pollution caused by human activities such as industrial production, transportation, coal burning for daily life, and infrastructure construction, as well as the significant impact of dust deposition, has led to severe pollution in Xi'an [27]. Chongqing is located in southwest China, showing a subtropical monsoon humid climate with abundant rainfall and a high degree of agricultural land development.…”

Section: Data Processing and Statistical Analysesmentioning

confidence: 99%

Economic and Industrial Development SignificantlyContribute to Acidity and Ionic Compositions of Rainwaterin China

Huang,

2024

Water

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To achieve a holistic understanding of the intricate interactions among human activities, atmospheric chemistry, and acid rain in China, a rigorous analysis of rainwater chemistry was made using a dataset comprising 2656 data points from 24 sites. The main cation and anion in the chemical composition of precipitation were Ca2+ and SO42− in China, with an average concentration of 169.9 μeq/L and 135.4 μeq/L, respectively. Acid rain generally occurs in southern cities such as Shenzhen, Guangzhou, Zhuhai, Xiamen, and Chongqing. There were evident regional disparities in acidity and ion concentrations in rainwater, with an increase in acidity and a decrease in ion concentrations from north to south across China. Utilizing positive matrix factorization, the study found that NH4+, SO42−, and NO3− mainly originated from anthropogenic sources such as fossil fuel combustion, vehicle exhaust emissions, agricultural fertilization, and industrial emissions (as reflected by F3 and F4). Ca2+ mainly stems from crustal factors, including industrial dust and natural crust (as represented by F1 and F4). Na+ and Cl− were traceable from marine sources (as reflected by F5), while Mg2+ originated from crust origin (as presented by F1). K+ was mainly derived from a mixed source of crust, marine, and biomass burning (as indicated by F2 and F3). The correlation analyses showed that SO42− and NO3− showed significant correlations with GDP and population. F− was associated with wastewater, which may be linked to the production of brick and tiles from clay with high fluoride contents. The pH was negatively related to industrial wastewater. Long-term analysis of precipitation chemistry in four cities suggested a clear decrease in the proportion of SO42− but a considerable increase in the proportion of NO3− in anions in metropolitans of Shanghai and Chongqing due to the environmental measures that targeted reducing sulfur dioxide (SO2) emissions and increase of vehicles. This showed that pollution control strategies had an impact on precipitation ion concentrations. These results can conclude that economic and industrial growth, which will increase energy consumption, utilization of coal combustion, and a subsequent rise in pollutant emissions, can contribute to the change in the chemical compositions of rainwater and the exacerbation of acid rain.

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Linkage between precipitation isotopes and water vapor sources in the monsoon margin: Evidence from arid areas of Northwest China

Chen,

Zhang,

Wang

et al. 2024

J. Arid Land

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Precipitation stable isotope composition, moisture sources, and controlling factors in Xi'an, Northwest China

Cited by 11 publications

References 78 publications

Triple oxygen isotope compositions reveal transitions in the moisture source of West China Autumn Precipitation

Triple oxygen isotope compositions reveal transitions in the moisture source of West China Autumn Precipitation

Economic and Industrial Development SignificantlyContribute to Acidity and Ionic Compositions of Rainwaterin China

Linkage between precipitation isotopes and water vapor sources in the monsoon margin: Evidence from arid areas of Northwest China

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