Atmospheric constraints on δ<sup>18</sup>O and <i>d</i>-excess in precipitation at the middle latitude in the southwestern Atlantic region

Martínez, David Luis La Red; Maenza, Reinaldo A.; Londoño, Orlando Mauricio Quiroz

doi:10.1080/10256016.2020.1815722

Cited by 3 publications

(1 citation statement)

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“…Light isotopes are depleted in advance while heavy isotopes in raindrops are enriched [4][5][6], showing that there has been a decrease in the deuterium excess or d which equals δ 2 H − 8 × δ 18 O [7]. The evaporation and condensation are impacted by the different climate parameters [8,9], and the deuterium excess in meteoric water is also sensitive to these climate conditions [10][11][12], causing that the deuterium excess can be a useful indicator to trace the source of water vapor and assess the potential existence of the sub-cloud evaporation [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Chen

Zhang

Argiriou

et al. 2021

Water

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The deuterium excess in precipitation is an effective indicator to assess the existence of sub-cloud evaporation of raindrops. Based on the synchronous measurements of stable isotopes of hydrogen and oxygen (δ2H and δ18O) in precipitation for several sites in Lanzhou, western China, spanning for approximately four years, the variations of deuterium excess between the ground and the cloud base are evaluated by using a one-box Stewart model. The deuterium excess difference below the cloud base during summer (−17.82‰ in Anning, −11.76‰ in Yuzhong, −21.18‰ in Gaolan and −12.41‰ in Yongdeng) is greater than that in other seasons, and difference in winter is weak due to the low temperature. The variations of deuterium excess in precipitation due to below-cloud evaporation are examined for each sampling site and year. The results are useful to understand the modification of raindrop isotope composition below the cloud base at a city scale, and the quantitative methods provide a case study for a semi-arid region at the monsoon margin.

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Section: Introductionmentioning

confidence: 99%

Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Chen

Zhang

Argiriou

et al. 2021

Water

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Assessing recharge process in plain catchments using isotopic and hydrochemical techniques

Calvi

Dapeña

Londoño

et al. 2022

Groundwater for Sustainable Development

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Environmental isotope applications in Latin America and the Caribbean region

Soto

Sánchez‐Murillo

Ortega

et al. 2020

Isotopes in Environmental and Health Studies

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This Special Issue illustrates the use of environmental isotopes in studying and assessing hydrogeological and ecohydrological issues in the Latin America and the Caribbean (LAC) region. The issue includes twenty selected papers, which have been peer-reviewed in Isotopes in Environmental and Health Studies. Although the LAC region concentrates a third of the world's freshwater resources [1], access to safe water supplies and sanitation remains unevenly distributed, with water scarcity affecting most arid and semiarid areas and serious water quality issues across the region [2]. About 82% of the LAC population lives in urban centres, including some megacities, creating major challenges to water authorities [3]. Water security is often compromised due to a fast-growing water demand near urban centres (i.e. domestic supply, irrigation and industrial uses) along with the expected impacts of climate change [4] on both water availability and quality [5-7]. In many parts of the LAC region, groundwater resources have become the main or the only source of water to cover basic human needs and the maintenance of ecosystems [8-10]. This rapid increase of water demand is generally translated into intensive and unsustainable exploitation of water resources, having a profound impact on local hydrological cycles. In order to assess the availability of local resources for the near future and adopt sustainable management practices, sound and precise hydrological information is required. Stable (2 H, 13 C, 15 N, 18 O, 87 Sr) and radioactive (3 H, 7 Be, 14 C, 210 Pb, 222 Rn) environmental isotopes can provide unique and valuable information required for the assessment and comprehensive management of water resources and for understanding the complex interactions between terrestrial ecosystems (i.e. soil, vegetation) and the hydrological cycle. Isotope hydrology tools and methods have been used to characterise both surface and ground water systems, study recharge processes from rainfall generation to infiltration, coastal aquifers, major lakes and river basins as well as in assessing lake dynamics, geothermal fields, dam leakage problems, and evapotranspiration partitioning [11]. However, the incorporation of these applications in LAC has not been fully implemented yet. To date, there is a relatively small number of case studies published from a limited number of institutes and universities, often through the assistance and support provided since the 1980s by the International Atomic Energy Agency (IAEA) or through bilateral cooperation with other international agencies. The pressing need in recent years to better describe and understand our natural systems, coupled with the easier access to analytical instrumentation [12], has resulted in the establishment and consolidation of many research groups in the LAC region using environmental isotopes to study hydrological and ecological systems. Therefore, the region has made steady progress over the last years to train a new generation of experts in hydrology and ecology with courses and w...

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Atmospheric constraints on δ¹⁸O and d-excess in precipitation at the middle latitude in the southwestern Atlantic region

Cited by 3 publications

References 26 publications

Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Assessing recharge process in plain catchments using isotopic and hydrochemical techniques

Environmental isotope applications in Latin America and the Caribbean region

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Atmospheric constraints on δ18O and d-excess in precipitation at the middle latitude in the southwestern Atlantic region

Cited by 3 publications

References 26 publications

Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Assessing recharge process in plain catchments using isotopic and hydrochemical techniques

Environmental isotope applications in Latin America and the Caribbean region

Contact Info

Product

Resources

About

Atmospheric constraints on δ¹⁸O and d-excess in precipitation at the middle latitude in the southwestern Atlantic region