典型文献
Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil
文献摘要：
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 818O 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.
文献关键词：
中图分类号：
作者姓名：
Vinícius dos SANTOS;Peter MARSHALL FLEMING;Luís HENRIQUE MANCINI;Stela DALVA SANTOS COTA;Graziele Beatriz de LIMA;Rafaela RODRIGUES GOMES;Roberto Eduardo KIRCHHEIM;Ricardo SANCHEZ-MURILLO;Didier GASTMANS
作者机构：
S?o Paulo State University(UNESP),Environmental Studies Center.Av.24ABased,1515-Bela Vista,13.506-900,Rio Claro(SP),Brazil;Center for the Development of the Nuclear Technology(CDTN-CNEN),Av.Presidente Ant?nio Carlos,6.627,Campus da UFMG-Pampulha,31270-90,Belo Horizonte(MG),Brazil;Universidade de Brasília-UnB,Instituto de Geociências,Laboratório de Isótopos Estáveis.Campus"Darcy Ribeiro",Asa Norte,70.910-900,Brasília(DF),Brasil;Hydrology and Territorial Management Directory(DHT),The Geological Survey of Brazil(CPRM-SGB),S?o Paulo(SP),Brazil;University of Texas at Arlington,Earth and Environmental Sciences Department,500 Yates Street,Arlington,Texas,76019,USA;Stable Isotopes Research Group and Water Resources Management Laboratory,Universidad Nacional,Heredia,Costa Rica
文献出处：
引用格式：
[1]Vinícius dos SANTOS;Peter MARSHALL FLEMING;Luís HENRIQUE MANCINI;Stela DALVA SANTOS COTA;Graziele Beatriz de LIMA;Rafaela RODRIGUES GOMES;Roberto Eduardo KIRCHHEIM;Ricardo SANCHEZ-MURILLO;Didier GASTMANS-.Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil)[J].大气科学进展（英文版）,2022(10):1693-1708
A类：
Portion,continentality,SACZ,Fronts
B类：
Distinguishing,Regional,Atmospheric,Controls,Precipitation,Isotopic,Variability,Central,Southeast,Brazil,ratios,record,history,water,phase,transitions,fractionation,processes,during,moisture,transport,rainfall,formation,Here,evaluated,isotopic,precipitation,over,central,southeastern,different,timescales,Monthly,compositions,were,associated,classical,effects,amount,seasonality,demonstrating,importance,vapor,recirculation,regional,atmospheric,systems,American,Convergence,Zone,Cold,CF,While,recycling,may,also,be,observed,daily,such,not,strongly,correlated,rate,Daily,variability,revealed,specific,climatic,features,818O,depleted,values,wet,convective,activity,large,availability,analysis,role,sources,Isotope,combined,excess,explain,how,interact,Our,findings,provide,new,understanding,sampling,highlight,isotopes,decipher,key,hydrometeorological,complex,spatial,temporal,context
AB值：
0.562542
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