Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s00376-022-1367-0 http://hdl.handle.net/11449/240041 |
Resumo: | Precipitation isotope ratios (O and H) record the history of water phase transitions and fractionation processes during moisture transport and rainfall formation. Here, we evaluated the isotopic composition of precipitation over the central-southeastern region of Brazil at different timescales. Monthly isotopic compositions were associated with classical effects (rainfall amount, seasonality, and continentality), demonstrating the importance of vapor recirculation processes and different regional atmospheric systems (South American Convergence Zone-SACZ and Cold Fronts-CF). While moisture recycling and regional atmospheric processes may also be observed on a daily timescale, classical effects such as the amount effect were not strongly correlated (δ18O-precipitation rate r ≼ −0.37). Daily variability revealed specific climatic features, such as δ18O depleted values (∼6‰ to −8‰) during the wet season were associated with strong convective activity and large moisture availability. Daily isotopic analysis revealed the role of different moisture sources and transport effects. Isotope ratios combined with d-excess explain how atmospheric recirculation processes interact with convective activity during rainfall formation processes. Our findings provide a new understanding of rainfall sampling timescales and highlight the importance of water isotopes to decipher key hydrometeorological processes in a complex spatial and temporal context in central-southeastern Brazil. |
id |
UNSP_8215b5062eae9e3072fc9e9072d273fe |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/240041 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazild-excessmoisture source and transportprecipitationsouthern Atlantic Ocean and Amazonstable water isotopesPrecipitation isotope ratios (O and H) record the history of water phase transitions and fractionation processes during moisture transport and rainfall formation. Here, we evaluated the isotopic composition of precipitation over the central-southeastern region of Brazil at different timescales. Monthly isotopic compositions were associated with classical effects (rainfall amount, seasonality, and continentality), demonstrating the importance of vapor recirculation processes and different regional atmospheric systems (South American Convergence Zone-SACZ and Cold Fronts-CF). While moisture recycling and regional atmospheric processes may also be observed on a daily timescale, classical effects such as the amount effect were not strongly correlated (δ18O-precipitation rate r ≼ −0.37). Daily variability revealed specific climatic features, such as δ18O depleted values (∼6‰ to −8‰) during the wet season were associated with strong convective activity and large moisture availability. Daily isotopic analysis revealed the role of different moisture sources and transport effects. Isotope ratios combined with d-excess explain how atmospheric recirculation processes interact with convective activity during rainfall formation processes. Our findings provide a new understanding of rainfall sampling timescales and highlight the importance of water isotopes to decipher key hydrometeorological processes in a complex spatial and temporal context in central-southeastern Brazil.São Paulo State University (UNESP), Environmental Studies Center. Av. 24ABased, 1515 - Bela Vista, SPCenter for the Development of the Nuclear Technology (CDTN - CNEN), Av. Presidente Antônio Carlos, 6.627, Campus da UFMG - Pampulha, MGUniversidade de Brasília - UnB Instituto de Geociências Laboratório de Isótopos Estáveis, Campus “Darcy Ribeiro”, Asa Norte, DFHydrology and Territorial Management Directory (DHT) The Geological Survey of Brazil (CPRM-SGB), SPEarth and Environmental Sciences Department University of Texas at Arlington, 500 Yates StreetStable Isotopes Research Group and Water Resources Management Laboratory Universidad NacionalSão Paulo State University (UNESP), Environmental Studies Center. Av. 24ABased, 1515 - Bela Vista, SPUniversidade Estadual Paulista (UNESP)Universidade Federal de Minas Gerais (UFMG)Universidade de Brasília (UnB)The Geological Survey of Brazil (CPRM-SGB)University of Texas at ArlingtonUniversidad NacionalSantos, Vinícius dos [UNESP]Fleming, Peter MarshallMancini, Luís HenriqueCota, Stela Dalva SantosLima, Graziele Beatriz de [UNESP]Gomes, Rafaela Rodrigues [UNESP]Kirchheim, Roberto EduardoSanchéz-Murillo, RicardoGastmans, Didier [UNESP]2023-03-01T19:58:45Z2023-03-01T19:58:45Z2022-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1693-1708http://dx.doi.org/10.1007/s00376-022-1367-0Advances in Atmospheric Sciences, v. 39, n. 10, p. 1693-1708, 2022.1861-95330256-1530http://hdl.handle.net/11449/24004110.1007/s00376-022-1367-02-s2.0-85129895211Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAdvances in Atmospheric Sciencesinfo:eu-repo/semantics/openAccess2023-03-01T19:58:45Zoai:repositorio.unesp.br:11449/240041Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:15:18.853130Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
title |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
spellingShingle |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil Santos, Vinícius dos [UNESP] d-excess moisture source and transport precipitation southern Atlantic Ocean and Amazon stable water isotopes |
title_short |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
title_full |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
title_fullStr |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
title_full_unstemmed |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
title_sort |
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil |
author |
Santos, Vinícius dos [UNESP] |
author_facet |
Santos, Vinícius dos [UNESP] Fleming, Peter Marshall Mancini, Luís Henrique Cota, Stela Dalva Santos Lima, Graziele Beatriz de [UNESP] Gomes, Rafaela Rodrigues [UNESP] Kirchheim, Roberto Eduardo Sanchéz-Murillo, Ricardo Gastmans, Didier [UNESP] |
author_role |
author |
author2 |
Fleming, Peter Marshall Mancini, Luís Henrique Cota, Stela Dalva Santos Lima, Graziele Beatriz de [UNESP] Gomes, Rafaela Rodrigues [UNESP] Kirchheim, Roberto Eduardo Sanchéz-Murillo, Ricardo Gastmans, Didier [UNESP] |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Federal de Minas Gerais (UFMG) Universidade de Brasília (UnB) The Geological Survey of Brazil (CPRM-SGB) University of Texas at Arlington Universidad Nacional |
dc.contributor.author.fl_str_mv |
Santos, Vinícius dos [UNESP] Fleming, Peter Marshall Mancini, Luís Henrique Cota, Stela Dalva Santos Lima, Graziele Beatriz de [UNESP] Gomes, Rafaela Rodrigues [UNESP] Kirchheim, Roberto Eduardo Sanchéz-Murillo, Ricardo Gastmans, Didier [UNESP] |
dc.subject.por.fl_str_mv |
d-excess moisture source and transport precipitation southern Atlantic Ocean and Amazon stable water isotopes |
topic |
d-excess moisture source and transport precipitation southern Atlantic Ocean and Amazon stable water isotopes |
description |
Precipitation isotope ratios (O and H) record the history of water phase transitions and fractionation processes during moisture transport and rainfall formation. Here, we evaluated the isotopic composition of precipitation over the central-southeastern region of Brazil at different timescales. Monthly isotopic compositions were associated with classical effects (rainfall amount, seasonality, and continentality), demonstrating the importance of vapor recirculation processes and different regional atmospheric systems (South American Convergence Zone-SACZ and Cold Fronts-CF). While moisture recycling and regional atmospheric processes may also be observed on a daily timescale, classical effects such as the amount effect were not strongly correlated (δ18O-precipitation rate r ≼ −0.37). Daily variability revealed specific climatic features, such as δ18O depleted values (∼6‰ to −8‰) during the wet season were associated with strong convective activity and large moisture availability. Daily isotopic analysis revealed the role of different moisture sources and transport effects. Isotope ratios combined with d-excess explain how atmospheric recirculation processes interact with convective activity during rainfall formation processes. Our findings provide a new understanding of rainfall sampling timescales and highlight the importance of water isotopes to decipher key hydrometeorological processes in a complex spatial and temporal context in central-southeastern Brazil. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-10-01 2023-03-01T19:58:45Z 2023-03-01T19:58:45Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s00376-022-1367-0 Advances in Atmospheric Sciences, v. 39, n. 10, p. 1693-1708, 2022. 1861-9533 0256-1530 http://hdl.handle.net/11449/240041 10.1007/s00376-022-1367-0 2-s2.0-85129895211 |
url |
http://dx.doi.org/10.1007/s00376-022-1367-0 http://hdl.handle.net/11449/240041 |
identifier_str_mv |
Advances in Atmospheric Sciences, v. 39, n. 10, p. 1693-1708, 2022. 1861-9533 0256-1530 10.1007/s00376-022-1367-0 2-s2.0-85129895211 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Advances in Atmospheric Sciences |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1693-1708 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129179709865984 |