Dual effects of precipitation and evaporation on lake water stable isotope composition in the monsoon region

Mingquan, Hua; Yao, Tianci; Luo, Zidong; Zhou, Hui; Rao, Zhiguo

doi:10.1002/hyp.13462

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…Precipitation infiltration and runoff generation processes (Bam and Ireso, 2018;Hou et al, 2008) and groundwater recharge and regeneration capacity (Smith et al, 1992;Cortes and Farvolden, 1989) can be determined combining the isotopic composition changes of surface water, soil water, and groundwater. Regional meteorological and hydrological conditions and the contribution of various environmental factors can be evaluated (Hua et al, 2019) by comparing different waterline equations and analyzing changes in various water bodies. Furthermore, doing this has laid a foundation for studying the deep mechanism of the water cycle (Gao et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Isotopic differences in soil–plant–atmosphere continuum composition and control factors of different vegetation zones on the northern slope of the Qilian Mountains

et al. 2022

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Abstract. Understanding the differences and control factors of stable water isotopes in the soil–plant–atmosphere continuum (SPAC) of different vegetation zones is of great significance in revealing hydrological processes and regional water cycle mechanisms. From April 2018 to October 2019, we collected 1281 samples to investigated the stable water isotopes' changes in the SPAC of three different vegetation zones (alpine meadows, forests, and arid foothills) in the Shiyang River basin. The results show the following: (1) precipitation plays a major control role in the SPAC. From alpine meadows to arid foothills, the temperature effect of precipitation isotopes increases as altitude decreases. (2) From the alpine meadow to the arid foothills, soil water isotopes are gradually enriched. (3) Alpine meadow plants are mainly supplied by precipitation in the rainy season, and forest plants mainly utilize soil water in the dry season and precipitation in the rainy season. The soil water in the arid foothills is primarily recharged by groundwater, and the evaporation of plant isotopes is strong. (4) Temperature and altitude are potential factors that control the isotopic composition of the SPAC. This research will help in understanding of the SPAC system's water cycle at different altitudes and climates in high mountains.

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Section: Introductionmentioning

confidence: 99%

Isotopic differences in soil–plant–atmosphere continuum composition and control factors of different vegetation zones on the northern slope of the Qilian Mountains

et al. 2022

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“…The isotopic composition of lake water is closely related to precipitation recharge. Based on the δ 18 O LW composition, which is derived from δ 18 O P (Hua et al., 2019; Leng and Marshall, 2004), the increased δ 18 O P values during the non-monsoon season from early December 2016 to mid June 2017 is one reason for the enrichment of δ 18 O LW at Lake Nanyihu at this time. The δ 18 O LW values of Lake Nanyihu are also more positive than that of δ 18 O P (Figure 3), which indicates that δ 18 O LW is influenced by an enrichment effect caused by temperature-induced evaporation.…”

Section: ⅴ Discussionmentioning

confidence: 99%

“…Moreover, the peak in monsoon precipitation does not correspond well to the minimum values of δ 18 O LW (Figure 4). And according to the lake-water sampling frequency at the lakes in this study, and since the stable isotope composition of the lake water is considered to be related to the cumulative effect of precipitation (Hua et al, 2019), we take the sum of precipitation during the 10- or 20-day interval prior to each sampling event as the cumulative precipitation. Correlation analysis of δ 18 O LW and cumulative precipitation amount indicates that the ‘amount effect’ did not occur during the monsoon season (Figure 5).…”

Section: ⅴ Discussionmentioning

confidence: 99%

Seasonal variations in the lake-water oxygen isotope composition of four lakes in the East Asian summer monsoon region: Implications for the interpretation of paleo-isotope records

Zhang

Liu

et al. 2019

Progress in Physical Geography: Earth and Environment

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The scarcity of modern process studies of the relationship between climatic variables and lake-water oxygen isotope (δ18OLW) composition has restricted our understanding of the climatic significance of oxygen isotope (δ18O) records from lake sediments. We measured changes in δ18OLW at four lakes (Nanyihu, Gonghai, Mayinghai and Xihaizi) at various locations across the East Asian summer monsoon (EASM) region, from December 2016 to January 2018. The variations in δ18OLW at Lake Nanyihu, located in the lower reach of the Yangtze River, are controlled by precipitation oxygen isotope (δ18OP) composition, temperature and evaporation during the non-monsoon season. However, the variations in δ18OLW at the lakes close to the northern limit of the EASM (Gonghai, Mayinghai and Xihaizi) are affected not only by δ18OP, temperature and evaporation, but also by the replenishment of groundwater during the non-monsoon season. In general, during the non-monsoon season, the variation of δ18OLW exhibits a variety of patterns and the controlling factors across the EASM region are complex. During the monsoon season, although the effect of evaporation-induced isotopic enrichment still affects δ18OLW, the variations in δ18OLW are more influenced by the supply of abundant precipitation with lower δ18OP to the lakes, which caused a substantial decrease in δ18OLW across the EASM region in this season. Therefore, the variations in δ18OLW mainly reflect the δ18OP of the EASM during the monsoon season. However, the timing of the peak in monsoon precipitation does not correspond well to minima in δ18OLW, and correlation analysis reveals that there is only a weak relationship between δ18OLW and precipitation/humidity at all four lakes during the monsoon season. These findings demonstrate that although δ18OLW can represent the δ18OP of the EASM, it does not reflect precipitation/humidity during the monsoon season. Overall, our findings indicate that the seasonal variations of δ18OLW across the EASM region are controlled by different climatic variables, which implies that the interpretation of lacustrine δ18O records across the EASM region as an indicator of regional effective precipitation/humidity needs to be reassessed.

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“…It is worth noting that the evaporation recorded by the E-601B evaporator closely approximates the actual evaporation experienced in small water bodies such as lakes and rivers. As such, it reliably represents the quantity and temporal variations of evaporation within the study area (Hua et al, 2019).…”

Section: Hydrometeorological Observationsmentioning

confidence: 99%

Seasonal variation and influence factors of river water isotopes in the East Asian monsoon region: a case study in the Xiangjiang River basin spanning 13 hydrological years

Xiao,

Zhang,

Xiao

et al. 2023

Hydrol. Earth Syst. Sci.

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Abstract. Seasonal variation and influencing factors of river water isotopes were investigated in the Xiangjiang River basin located in the East Asian monsoon region. This investigation involved comprehensive sampling of daily precipitation and river water with a 5 d interval as well as observing hydrometeorological factors spanning 13 hydrological years from January 2010 to December 2022, combined with the temporal and spatial correlation analyses based on linear regression and the isotopic Atmospheric Water Balance Model. Key findings are as follows: river water δ2H (δ2HR) exhibited significant seasonal variation, with the most positive and negative values occurring in the spring flood period and summer drought period, respectively, in alignment with those observed in precipitation. The correlations of the δ2HR with corresponding hydrometeorological factors with a 5 d interval were commonly weak due to the seasonality of precipitation isotopes and mixing of various water bodies within the basin, but the changes in the runoff (ΔR) and δ2HR (Δδ2HR) between two contiguous samplings with 5 d or higher intervals showed significant responses to the corresponding accumulated precipitation and evaporation. Prolonged rainless intervals with high evaporation rates in 2013 and 2022 as well as significant precipitation events in major flood periods in 2011 and 2017 had a significant impact on the δ2HR and runoff discharge. However, the most positive δ2HR values were primarily influenced by precipitation input with the most enriched isotopes in the spring flood period, while the moderately isotope-depleted precipitation during limited wetness conditions led to the most negative δ2HR. The spatial correlation analysis between water isotopes and hydrometeorological factors at the observing site and in the surrounding regions supported the representation of the Changsha site in the Xiangjiang River basin. These results underscore the potential of Δδ2HR as a proxy that reflects the seasonal variations in local environments, while caution is advised when interpreting extreme isotopic signals in river water. Overall, this study provides insights into the seasonal variation, extreme signal interpreting, and controlling factors of δ2HR in the study area, which was valuable for paleoclimate reconstruction and establishment of isotope hydrologic models.

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Dual effects of precipitation and evaporation on lake water stable isotope composition in the monsoon region

Cited by 11 publications

References 43 publications

Isotopic differences in soil–plant–atmosphere continuum composition and control factors of different vegetation zones on the northern slope of the Qilian Mountains

Isotopic differences in soil–plant–atmosphere continuum composition and control factors of different vegetation zones on the northern slope of the Qilian Mountains

Seasonal variations in the lake-water oxygen isotope composition of four lakes in the East Asian summer monsoon region: Implications for the interpretation of paleo-isotope records

Seasonal variation and influence factors of river water isotopes in the East Asian monsoon region: a case study in the Xiangjiang River basin spanning 13 hydrological years

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