Synoptic control of the spatiotemporal variability of fog and low clouds under ENSO phenomena along the Chilean coast (17°-36° S)

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dc.article.number107533
dc.catalogadorjlo
dc.contributor.authorEspinoza Escobedo, Vicente Patricio
dc.contributor.authorLobos Roco, Felipe Andrés
dc.contributor.authorDel Rio López, Camilo
dc.date.accessioned2024-08-19T15:47:24Z
dc.date.available2024-08-19T15:47:24Z
dc.date.issued2024
dc.description.abstractThe northern and central coasts of Chile have an extensive semi-permanent layer of stratocumulus clouds that produce fog on land, a crucial resource for water-stressed areas. This study examines the spatio-temporal variability of fog and low clouds (FLC) across four climatic zones (17°S-36°S) characterized by arid conditions. Our analysis aims to elucidate the relationship between FLC patterns and the El Niño-Southern Oscillation (ENSO) phenomenon based on 25 years (1998–2022) of GOES satellite images. The variability of FLC shows a marked, although spatially asymmetric, seasonal cycle, with a subtle positive trend in the long-term. Our results suggest that the presence of FLC is controlled by the strength of the thermal inversion (correlation coefficient, r = 0.7), which, in turn, depends on the sea surface temperature (SST) and the subsidence. Specifically, FLC patterns are controlled by SST in the north (r = −0.9) and by subsidence intensity in the south (r = 0.9). Furthermore, our analysis indicates a potential link between ENSO and FLC, which alters the SST-subsidence equilibrium. At 20°S, warm phases of ENSO lead to increased FLC during the summer and decreased FLC during the winter. Conversely, at 30°S, warm phases result in decreased FLC during the summer and increased FLC during the winter. However, during cold phases, this trend is reversed. At 20°S, FLC decreases in summer and increases in winter, while at 30°S, FLC increases in summer and decreases in winter. In summary, our study offers a novel perspective on understanding the large-scale dynamics associated with FLC frequency along the central and northern coasts of Chile, including FLC underlying mechanisms and the long-term influence exerted by ENSO on the phenomenon.
dc.description.funderCentro UC Desierto de Atacama
dc.description.funderChilean National Commission of Science and Technology
dc.format.extent13 páginas
dc.fuente.origenSCOPUS
dc.identifier.doi10.1016/j.atmosres.2024.107533
dc.identifier.issn0169-8095
dc.identifier.scopusidSCOPUS_ID:85196037563
dc.identifier.urihttp://doi.org/10.1016/j.atmosres.2024.107533
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/87499
dc.information.autorucInstituto de Geografía; Espinoza Escobedo, Vicente Patricio; S/I; 1048780
dc.information.autorucInstituto de Geografía; Lobos Roco, Felipe Andrés; 0000-0002-8786-0083; 157192
dc.information.autorucInstituto de Geografía; Del Rio López, Camilo; 0000-0002-6817-431X; 17960
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final13
dc.pagina.inicio1
dc.revistaAtmospheric Research
dc.rightsacceso restringido
dc.subjectENSO
dc.subjectFog and low clouds
dc.subjectSea surface temperature
dc.subjectSubsidence
dc.subjectThermal inversion
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.subject.ods14 Life below water
dc.subject.ods13 Climate action
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.titleSynoptic control of the spatiotemporal variability of fog and low clouds under ENSO phenomena along the Chilean coast (17°-36° S)
dc.typeartículo
dc.volumen308
sipa.codpersvinculados1048780
sipa.codpersvinculados157192
sipa.codpersvinculados17960
sipa.trazabilidadSCOPUS;2024-06-23
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