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dc.contributor.author
Pérez de Mendiola, María Eugenia
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dc.contributor.author
Blazquez, Josefina
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dc.contributor.author
Solman, Silvina Alicia
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dc.date.available
2024-05-16T11:59:25Z
dc.date.issued
2024-03
dc.identifier.citation
Pérez de Mendiola, María Eugenia; Blazquez, Josefina; Solman, Silvina Alicia; Characterization of wet and dry periods over southern South America; Springer; Climate Dynamics; 3-2024; 1-15
dc.identifier.uri
http://hdl.handle.net/11336/235488
dc.description.abstract
This study characterizes wet and dry conditions in southern South America, defined through the standardized precipitation evapotranspiration index (SPEI), considering short and long timescales. Prior to analysis, a regionalization was conducted considering the area’s diverse climatological regimes, employing a combination of the k-means clustering algorithm and principal component analysis. Dry and wet events were analyzed over six homogeneous regions, defined as wet or dry conditions with time and spatial coherence. Generally, smaller events (< 100,000 Km²) were prevalent monthly, while larger events (> 50% of a region) occurred less frequently and varied in size over time. Event intensity varied, with no prolonged preference for a specific intensity. Certain regions, notably southern Bolivia and northwestern Argentina showed a discernible tendency towards drier conditions over time, with wet events becoming more intense despite reduced coverage. The events defined with shorter SPEI timescales showed similar behavior to those defined with longer SPEI timescales but with higher month-to-month variability and less spatial coherence. A wavelet analysis revealed punctual, significant periods on the interannual timescale and more persistent ones on the interdecadal and decadal timescales. Mechanisms associated with event behavior were analyzed. Characterizing events in terms of their intensity, duration, and spatial extent revealed that moderate events were predominantly short (< 3 months) while longer and more extended events were often severe. Events calculated with shorter SPEI timescales showed smaller durations than those calculated with longer SPEI timescales. In addition, wet events showed a similar proportion of moderate and severe cases, while dry events were predominantly moderate.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
SPEI
dc.subject
SOUTH AMERICA
dc.subject
DRY AND WET EVENTS
dc.subject
REGIONALIZATION
dc.subject.classification
Investigación Climatológica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Characterization of wet and dry periods over southern South America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-05-14T13:41:51Z
dc.identifier.eissn
1432-0894
dc.journal.pagination
1-15
dc.journal.pais
Alemania
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dc.description.fil
Fil: Pérez de Mendiola, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.description.fil
Fil: Blazquez, Josefina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Solman, Silvina Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina
dc.journal.title
Climate Dynamics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00382-024-07217-y
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