Diagnosis of atmospheric circulation shifts in the central Tibetan Plateau: Evidence from stable isotopes

Li, Yao; Wang, Yu; Tian, Lide; Lewis, Stephen E.; Yoshimura, Kei; Wang, Cheng; Cui, Jiangpeng; Ma, Yaoming; Guo, Rong; Zhang, Jingyi; Jing, Zhaowei; Shao, Lili; Guo, Xiexian; Wang, Yong

doi:10.1016/j.atmosres.2022.106536

Cited by 4 publications

(3 citation statements)

References 61 publications

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“…The heavy isotopes become depleted when the warm and humid moisture is lifted and transported to high latitudes. The stronger the monsoon, the more δ 18 O p /δ 18 O v depleted (Li et al, 2023). At the same time, monsoon‐affected areas tend to exhibit a significant amount effect (Risi et al, 2008; Tharammal et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Previous research has revealed that the northward progression of the monsoon zone is highly variable in both the interannual and interdecadal term, influenced by fluctuations in monsoon intensity (Tan & Gong, 2022). The Indian summer monsoon has been observed to surmount the highlands and extend to the central Tibetan Plateau (Dai et al, 2021; Li et al, 2023; Yu et al, 2021), with some years of heightened activity even reaching the northeast (Gui et al, 2020; Li et al, 2015; Xie et al, 2022; Zhao et al, 2023). This process is accompanied by strong convection, leading to a significant depletion of stable isotopic compositions of precipitation and atmospheric vapour.…”

Section: Introductionmentioning

confidence: 99%

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Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Zhang,

Zhao,

Wang

et al. 2024

Hydrological Processes

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Stable isotopic compositions of precipitation (δ18Op, δ2Hp and d‐excessp) and atmospheric vapour (δ18Ov, δ2Hv and d‐excessv) with high spatial–temporal resolution are crucial in revealing hydrologic cycle. Based on the variation characteristics of δ18Op/δ18Ov, δ2Hp/δ2Hv and d‐excessp/d‐excessv in the headwaters of the Shule River (HSR) on hourly and daily scales from June to September 2018, this study analysed the relationships between δ18Op/δ2Hp and δ18Ov/δ2Hv combined with the equilibrium fractionation model, as well as δ18Op/δ18Ov and meteorological factors. The slopes of local meteoric water line (LMWL) and the δ2Hv‐δ18Ov fitting equation were similar (7.96 and 7.94) with both intercepts exceeding 10, reflecting the great contribution of recycling moisture. The values of δ18Ov/δ2Hv were lower than δ18Op/δ2Hp but with consistent variation patterns throughout the period. The equilibrium simulation results suggested that precipitation and atmospheric vapour almost approached isotopic equilibrium state, especially during monsoon intrusion period. Affected by monsoon intrusion, the slopes and intercepts of the LMWLs and the δ2Hv‐δ18Ov fitting equations were smaller than those during non‐monsoon period and d‐excess and δ18O were negatively correlated. Relative humidity had significant negative correlations with δ18Op and δ18Ov in the whole period, however, the positive correlations between δ18Op/δ18Ov and temperature were observed during non‐monsoon and monsoon intrusion period, respectively. Our results demonstrated that precipitation and atmospheric vapour isotopic compositions exhibited consistency under the influence of diverse moisture sources, while more complex relationships were found between δ18Op/δ18Ov and meteorological factors. This research provided evidence for using the isotopic compositions of atmospheric vapour to indicate moisture sources, and can improve understanding of the water cycle and eco‐hydrological process from the perspective of the interaction between water and gas phases of the inland river basin in northwest China.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Zhang,

Zhao,

Wang

et al. 2024

Hydrological Processes

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“…The ISM first arrives in the TP in the southeast (mid to late June) and progressively moves northwestward. Conversely, the time for monsoon retreat gradually becomes later from north to south of the TP [23,[38][39][40]. Nevertheless, using the d-excess value to characterize moisture sources in precipitation relies on the assumption that d-excess remains constant during moisture transport, which contradicts the actual situation [41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variations of Modern Precipitation Stable Isotopes over the North Tibetan Plateau and Their Influencing Factors

Zhu,

Luo

et al. 2023

Water

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Based on 360 event-based precipitation samples collected at six stations on the North Tibetan Plateau (NTP) in 2019–2020, we analyzed the influence of meteorological parameters, sub-cloud evaporation, moisture sources, and moisture transmission pathways on precipitation and its seasonal variations. The results show that precipitation δ18O, δ2H, and d-excess values show obvious seasonal variations, being depleted in winter and enriched in summer. Although temperature is an important variable that affects the change in δ18O values of precipitation, the results of the sub-cloud evaporation effect and moisture tracing show that differences in moisture sources caused by seasonal changes in large-scale water moisture transport are an important cause of seasonal changes in δ18O and d-excess of precipitation at NTP. Depleted δ18O and enriched d-excess in winter represent the source of moisture transported by the westerlies from the Mediterranean area and Central Asia. Enriched δ18O and d-excess values in summer precipitation are related to the temperature effect. In addition, the meridional motion of the atmospheric flow has an effect on the precipitation isotope values in the NTP. When the meridional circulation is enhanced, the water vapour from low latitudes is easily transported northwards, enriching the summer precipitation isotope values in the central and eastern parts of the plateau. This provides a new insight into the explanation of stable oxygen isotopes in climate proxies across the westerlies-dominated Tibetan Plateau.

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Moisture sources and isotopic composition of the 2020 extraordinary and persistent Meiyu rainfall in the Yangtze River valley modulated by large-scale circulations

Li,

Kawamura,

Ichiyanagi

et al. 2024

Atmospheric Research

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Diagnosis of atmospheric circulation shifts in the central Tibetan Plateau: Evidence from stable isotopes

Cited by 4 publications

References 61 publications

Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Seasonal Variations of Modern Precipitation Stable Isotopes over the North Tibetan Plateau and Their Influencing Factors

Moisture sources and isotopic composition of the 2020 extraordinary and persistent Meiyu rainfall in the Yangtze River valley modulated by large-scale circulations

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