Environmental controls on stable isotopes of precipitation in Lanzhou, China: An enhanced network at city scale

Chen, Fenli; Zhang, Mingjun; Wang, Shengjie; Qiu, Xue; Du, Mingxia

doi:10.1016/j.scitotenv.2017.07.216

Cited by 29 publications

(26 citation statements)

References 49 publications

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“…Compared with the results of previous studies, the LMWL equations during the summer monsoon in Chengdu were similar to those in other cities in southern China, such as Changsha, Guangzhou, Fuzhou, and Guilin [10,32,46,47]. However, they were higher than those in mid-latitude monsoon regions such as Lanzhou, Fengxiang, Ningwu and Bin County [19,28,48], which had slopes and intercepts of usually less than 8 and 10, respectively. This indicates that in Chengdu, the precipitation moisture sources and transport path in addition to the dominant monsoon are similar to those in other cities in southern China.…”

Section: Local Meteoric Water Line During Summer Monsoon Periodsupporting

confidence: 69%

“…During the processes of atmospheric circulation, d-excess depends mainly on the meteorological conditions of the moisture source, which is negatively correlated with the relative humidity of the evaporation surface and positively correlated with the temperature [44]. It is also subject to recycled moisture, sub-cloud material exchanges, and secondary evaporation [19,20,49]. In the mid-low-latitude monsoon regions of China, the d-excess in precipitation is generally higher than 10 during the winter monsoon and is lower or slightly higher than 10 during the summer monsoon, by which the climatic conditions of the moisture source can be judged accordingly.…”

Section: Local Meteoric Water Line During Summer Monsoon Periodmentioning

confidence: 99%

“…For example, a significant negative correlation exists between δ 18 O in precipitation and latitude and altitude in China, especially in the Qinghai-Tibet Plateau [18]. In arid climate regions, rain droplets undergo strong sub-cloud secondary evaporation when landing from the cloud base, resulting in variations in isotopic composition and deviation of the local meteoric water line (LMWL) from the GMWL [19][20][21][22]. A study conducted in the leeward side of the Himalayas showed that factors such as temperature, vapor pressure, cloud-to-ground distance, and isotopic concentrations of water vapor in the external environment significantly altered the isotopic composition of precipitation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stable Isotope Characteristics for Precipitation Events and Their Responses to Moisture and Environmental Changes During the Summer Monsoon Period in Southwestern China

Xia¹,

Liu²,

Chen³

et al. 2020

Pol. J. Environ. Stud.

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Samples of hydrogen and oxygen stable isotopes in precipitation collected and analyzed during the summer monsoon in 2017 and 2018 in Chengdu are reported in this paper. Increasing (decreasing) trends of isotope values (δD and δ 18 O) occur from May to June (September to October), and the valleys occur from July to August. The correlation between δD and δ 18 O for both precipitation events and monthly average precipitation is significant, with high R 2 values (≥0.98). The differences in regression lines may be due to the comprehensive influence of moisture sources, transport path and sub-cloud processes. Combining the d-excess values of precipitation and air mass trajectories generated by the HYSPLIT model, precipitation with a low (high) d-excess value and a more (less) negative δ 18 O corresponds to moisture from ocean (inland) sources. The δ 18 O-temperature (T) and δ 18 O-precipitation (P) correlations are not significant and vary greatly among different periods, which may be attributed to the mutual masking of different effects and the influence of atmospheric circulation processes. The results imply that the negative values in biological and geological proxies may be related to warmer climate, higher precipitation and a larger contribution of oceanic monsoon precipitation, but cannot indicate the changes in temperature and precipitation quantifiably.

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Section: Local Meteoric Water Line During Summer Monsoon Periodsupporting

confidence: 69%

Section: Local Meteoric Water Line During Summer Monsoon Periodmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stable Isotope Characteristics for Precipitation Events and Their Responses to Moisture and Environmental Changes During the Summer Monsoon Period in Southwestern China

Xia¹,

Liu²,

Chen³

et al. 2020

Pol. J. Environ. Stud.

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“…The precision, based on replicate injections of each sample, is ±0.6‰ for δ 2 H and ±0.2‰ for δ 18 O. A similar procedure was applied in our previous work (Chen et al, ; Wang, Zhang, Hughes, et al, ).…”

Section: Methodsmentioning

confidence: 96%

Water Source Signatures in the Spatial and Seasonal Isotope Variation of Chinese Tap Waters

Wang

Zhang

Bowen

et al. 2018

Water Resources Research

Self Cite

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Different water sources exploited for public use have different exposure to risks associated with climatic and environmental change. Isotope ratios of tap water have previously been studied as a potential tool to link public supply waters with water source characteristics at local to continental scales, providing information on the footprint of and potential risks associated with the water sources used. Work that combines intensive spatial and temporal sampling with independent water management data has been limited, however. In this study, an extensive observation network was established during 2014–2016 to provide monthly tap water sampling across China. We show that the spatial distribution of annual mean tap water isotope ratios is generally consistent with that of local precipitation across China. We identify seasonal correlation between tap water and precipitation isotope ratios in south China, where use of surface water is prevalent. In contrast, relatively invariant tap water isotope ratios elsewhere in China, which are not correlated with seasonal variation of precipitation isotope ratios, can be attributed to use of groundwater or water from river basins with longer storage times. The tap water isotope signatures identified here could be widely applied to characterize water supplies and associated sustainability challenges in different regions worldwide.

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“…Earlier studies have demonstrated distinct "temperature effect", i.e. positive correlation between local temperature and precipitation d 18 O, at the middle and high latitude regions (Pape et al, 2010;Chen et al, 2017) whereas precipitation amount effect is dominant in the tropical and monsoon regions (Lachniet and Patterson, 2002;S anchez-Murillo et al, 2013). However, latest studies in the Asian monsoon region suggested that changes in moisture sources and/or their relative contributions are the main factors responsible for the seasonal variability on precipitation stable isotopes (Breitenbach et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The main controls of the precipitation stable isotopes at Kathmandu, Nepal

Adhikari

Gao

Yang

et al. 2020

Tellus B: Chemical and Physical Meteorology

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Precipitation stable isotopes ( 2 H and 18 O) are adequately understood on their climate controls in the Tibetan Plateau, especially the north of Himalayas via about 30 years' studies. However, knowledge of controls on precipitation stable isotopes in Nepal (the south of Himalayas), is still far from sufficient. This study described the intra-seasonal and annual variations of precipitation stable isotopes at Kathmandu, Nepal from 10 May 2016 to 21 September 2018 and analysed the possible controls on precipitation stable isotopes. The enriched dD and d 18 O values were identified during non-monsoon season and depleted values were found during monsoon season, showing remarkable intra-seasonal characteristics of monsoon influence. The local meteoric water line suggested a strong influence of evaporation during rainfall in non-monsoon season and significant impact of non-equilibrium processes on precipitation during monsoon season. Temperature-d 18 O exhibited negative correlation for overall samples and showed no significant correlation in seasonal scales, which was attributed to the influence of monsoon moisture. The positive correlation was observed between d 18 O and outgoing longwave radiation (OLR) in monsoon season, suggesting the significant impact of convective activity on temporal variations of precipitation stable isotopes. During April, and May of 2016 and 2017, variation of precipitation stable isotopes are probably related with the mixing of multi-moisture combined with the westerlies transport. Our study suggested that the moisture transport processes are the main controls of precipitation stable isotopes at Kathmandu.

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Environmental controls on stable isotopes of precipitation in Lanzhou, China: An enhanced network at city scale

Cited by 29 publications

References 49 publications

Stable Isotope Characteristics for Precipitation Events and Their Responses to Moisture and Environmental Changes During the Summer Monsoon Period in Southwestern China

Stable Isotope Characteristics for Precipitation Events and Their Responses to Moisture and Environmental Changes During the Summer Monsoon Period in Southwestern China

Water Source Signatures in the Spatial and Seasonal Isotope Variation of Chinese Tap Waters

The main controls of the precipitation stable isotopes at Kathmandu, Nepal

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