Moisture Transport during Anomalous Climate Events in the La Plata Basin
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Published:2024-07-23
Issue:8
Volume:15
Page:876
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ISSN:2073-4433
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Container-title:Atmosphere
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language:en
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Short-container-title:Atmosphere
Author:
Drumond Anita1ORCID, de Oliveira Marina1, Reboita Michelle Simões2, Stojanovic Milica3ORCID, Nunes Ana Maria Pereira1, da Rocha Rosmeri Porfírio1ORCID
Affiliation:
1. Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo (USP), São Paulo 05508-090, Brazil 2. Institute of Natural Resources, Federal University of Itajubá (UNIFEI), Itajubá 37500-903, Brazil 3. Environmental Physics Laboratory (EPhysLab), Marine Research Centre, University of Vigo (UVIGO), 32004 Ourense, Spain
Abstract
This paper examines the linear relationship between climate events in the La Plata Basin (LP) from 1980 to 2018 and atmospheric moisture transport from major sources using a Lagrangian approach. The standardized precipitation evapotranspiration index (SPEI-1) was utilized to assess climate events, as monthly water balance variations may be related to changes in atmospheric moisture transport. A total of 49 dry and 46 wet events were identified through sequences of negative and positive SPEI-1 values, respectively. Lagrangian analysis tracked changes in moisture uptake and supply from sources to the LP during these events. Simple linear regression analysis revealed a relationship between moisture transport from the Amazonas (AM), North Atlantic (NA), and Tocantins (TO) basins and the severity and duration of climate events. Increased moisture supply from the São Francisco basin (SF) and Eastern Brazil oceanic (EBO) sources intensified the duration and severity of wet events. Peak wet events were linked to increased moisture supply from the northern South America basins (AM, NA, and TO), while peak droughts were related to decreased moisture uptake from eastern sources (TO, SF, and EBO). Our findings highlight how the water balance in distant regions affects the LP via moisture transport, emphasizing the need for interconnected adaptive strategies.
Funder
R&D program of ENGIE Brasil Energia S.A. and Companhia Energética Estreito regulated by ANEEL (Agência Nacional de Energia Elétrica), the Brazilian National Agency of Electric Energy
Reference75 articles.
1. Masson-Delmotte, V., Zhai, P., Pirani, A., Connors, S.L., Péan, C., Berger, S., Caud, N., Chen, Y., Goldfarb, L., and Gomis, M.I. (2023). IPCC, 2021. Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press. 2. Cunha, A.P.M.A., Zeri, M., Deusdará Leal, K., Costa, L., Cuartas, L.A., Marengo, J.A., Tomasella, J., Vieira, R.M., Barbosa, A.A., and Cunningham, C. (2019). Extreme Drought Events over Brazil from 2011 to 2019. Atmosphere, 10. 3. Drumond, A., Stojanovic, M., Nieto, R., Gimeno, L., Liberato, M.L.R., Pauliquevis, T., Oliveira, M., and Ambrizzi, T. (2021). Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index. Atmosphere, 12. 4. Naumann, G., Podesta, G., Marengo, J., Luterbacher, J., Bavera, D., Arias Muñoz, C., Barbosa, P., Cammalleri, C., Chamorro, L., and Cuartas, L.A. (2021). The 2019–2021 Extreme Drought Episode in La Plata Basin, Publications Office of the European Union. 5. Marengo, J.A., Cunha, A.P., Cuartas, L.A., Leal, K.R.D., Broedel, E., Seluchi, M.E., Michelin, C.M., De Praga Baião, C.F., Angulo, E.C., and Almeida, E.K. (2021). Extreme drought in the Brazilian Pantanal in 2019–2020: Characterization, causes, and impacts. Front. Water, 3.
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