Extreme Rainfall Contribution and Isotopic Excursion of Tropical Storm Alberto in Northeastern Mexico

IF 1.7 3区化学 Q4 BIOCHEMICAL RESEARCH METHODS

Rapid Communications in Mass Spectrometry Pub Date : 2025-09-30 DOI:10.1002/rcm.10146

Odalys J. Ibarra-Alejos, Ricardo Sánchez-Murillo, Rene Ventura-Houle, Oscar Guevara Mansilla, Tomas Peña-Alonso, Bárbara A. Macías-Hernández, Luis González-Hita, Miguel A. Mejía-González

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引用次数: 0

Abstract

Rationale

Tropical cyclones are critical extreme rainfall events that can temporarily mitigate drought impacts in semiarid regions. Despite the well-known North Atlantic hurricane season, the propagation of isotopically distinct rainfall pulses across semiarid landscapes of Mesoamerica is largely unknown.

Methods

In June 2024, tropical storm (TS) Alberto made landfall in northeastern Mexico. This study evaluates TS Alberto's monthly and annual rainfall contribution across Tamaulipas and Nuevo León and the isotopic excursions (δ¹⁸O and d-excess) in precipitation and surface water. Rainfall data from 86 stations and high-frequency isotope samples from Ciudad Victoria, Tampico, Chetumal, and the San Marcos River were analyzed.

Results

Results show that TS Alberto produced unprecedented rainfall, ranging from 0.22 to 11.41 times the 10-year June average, and up to 123% of the annual average in orographically influenced regions (i.e., variation is based on 86 locations across the region). Reservoir data highlight a rapid hydrological recovery, with dam levels in Tamaulipas and Nuevo León increasing significantly within weeks. Rainfall isotopic composition exhibited a broad spectrum (δ¹⁸O: −15.82‰ to −2.80‰), reflecting varying moisture sources, convective activity, and orographic effects. TS Alberto reproduced nearly the entire annual δ¹⁸O variability within a few hours, underscoring the strong isotopic imprint of extreme events. During TS Alberto's landfall and passage, an inverse trend between δ¹⁸O and precipitation amount was observed.

Conclusions

The storm's isotopic signature was traced into surface waters, providing evidence of rapid river response and potentially for aquifer recharge. These findings emphasize the dual hydrological and isotopic role of TCs in modulating water scarcity and improving hydroclimate reconstructions in drought-prone landscapes.

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墨西哥东北部热带风暴阿尔贝托的极端降雨贡献和同位素偏移

基本原理热带气旋是可以暂时缓解半干旱地区干旱影响的关键极端降雨事件。尽管众所周知的北大西洋飓风季节，但在中美洲半干旱地区，同位素不同的降雨脉冲的传播在很大程度上是未知的。2024年6月，热带风暴阿尔贝托在墨西哥东北部登陆。本研究评估了TS Alberto在塔毛利帕斯州和新evo州的月和年降雨量贡献León以及降水和地表水中的同位素偏移（δ18O和d-excess）。分析了来自86个站点的降雨数据和来自维多利亚城、坦皮科、切图马尔和圣马科斯河的高频同位素样本。结果表明，TS阿尔贝托产生了前所未有的降雨，其降雨量范围为10年6月平均值的0.22 - 11.41倍，在地形影响地区（即基于该地区86个地点的变化），降雨量高达年平均值的123%。水库数据强调水文恢复迅速，塔毛利帕斯州和新evo León的大坝水位在几周内显著上升。降水同位素组成具有广谱特征（δ18O:−15.82‰~−2.80‰），反映了不同的水汽来源、对流活动和地形效应。TS Alberto在几小时内重现了几乎整个年度δ18O变化，强调了极端事件的强烈同位素印记。在TS Alberto登陆和通过过程中，δ18O与降水量呈负相关。风暴的同位素特征被追踪到地表水中，为河流的快速反应和潜在的含水层补给提供了证据。这些发现强调了碳水化合物在干旱易发地区调节水资源短缺和改善水文气候重建中的双重水文和同位素作用。

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来源期刊

Rapid Communications in Mass Spectrometry 化学-分析化学

CiteScore

4.10

自引率

5.00%

发文量

219

审稿时长

2.6 months

期刊介绍： Rapid Communications in Mass Spectrometry is a journal whose aim is the rapid publication of original research results and ideas on all aspects of the science of gas-phase ions; it covers all the associated scientific disciplines. There is no formal limit on paper length ("rapid" is not synonymous with "brief"), but papers should be of a length that is commensurate with the importance and complexity of the results being reported. Contributions may be theoretical or practical in nature; they may deal with methods, techniques and applications, or with the interpretation of results; they may cover any area in science that depends directly on measurements made upon gaseous ions or that is associated with such measurements.