Artículo

Jacques-Coper, M.; Brönnimann, S.; Martius, O.; Vera, C.; Cerne, B. "Summer heat waves in southeastern Patagonia: An analysis of the intraseasonal timescale" (2016) International Journal of Climatology. 36(3):1359-1374
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Abstract:

We explore the occurrence of intraseasonal summer heat waves in southeastern Patagonia (SEPG, 46°-52°S; 65°-70°W) since the late 19th century by means of the Twentieth Century Reanalysis version 2 (20CRv2). In total, we identify 201 cases for 1872-2010 using criteria of intensity and persistence. In SEPG, the corresponding intraseasonal temperature signals are centred around the first day of each cluster of days fulfilling those conditions (named day 0). The mean warm deviation lasts for approximately 2weeks and exhibits a mean temperature peak of 4.3°C on day 0 (the warmest day in the mean signal). In a regional context, the mean temperature perturbation associated with these heat waves affects a broad area on both sides of the Andes. The warming in SEPG is caused by temperature advection and enhanced radiative heating, following a high pressure system over southern South America (SSA). This atmospheric perturbation is embedded in a wave-train-like pattern along the South Pacific. As part of this pattern, a cyclonic anomaly progresses eastward over the Tasman Sea in Oceania, moving from southeastern Australia (day -6, causing a dry anomaly there) over New Zealand (day -3, inducing a wet anomaly on its Southern Island). The anomalous circulation triggered by the wave train leads thus to a teleconnection between SSA and Oceania, documented in a previous work for the interannual scale. Two thirds of the heat wave events are linked to enhanced ascent in the South Atlantic Convergence Zone (SACZ) and around one third of the events within 1957-2010 are associated with extreme absolute maximum temperatures observed at a station-based record from SEPG. Finally, possible spatial modulations of the wave train pattern at the interannual and interdecadal timescales are discussed. © 2016 Royal Meteorological Society.

Registro:

Documento: Artículo
Título:Summer heat waves in southeastern Patagonia: An analysis of the intraseasonal timescale
Autor:Jacques-Coper, M.; Brönnimann, S.; Martius, O.; Vera, C.; Cerne, B.
Filiación:Oeschger Centre for Climate Change Research and Institute of Geography, University of Bern, Switzerland
CIMA/CONICET-UBA, DCAO/FCEN, UMI-IFAECI/CNRS, Universidad de Buenos Aires, Argentina
Palabras clave:Heat waves; Intraseasonal variability; Oceania; Patagonia; South America; Temperature; Warm season; Climate change; Temperature; Heat waves; Intraseasonal variability; Oceania; Patagonia; South America; Warm seasons; Climatology; air temperature; atmospheric circulation; extreme event; nineteenth century; regional climate; seasonal variation; summer; teleconnection; timescale; twentieth century; warming; Australia; New Zealand; Pacific Ocean; Pacific Ocean (South); Patagonia; Tasman Sea
Año:2016
Volumen:36
Número:3
Página de inicio:1359
Página de fin:1374
DOI: http://dx.doi.org/10.1002/joc.4430
Título revista:International Journal of Climatology
Título revista abreviado:Int. J. Climatol.
ISSN:08998418
CODEN:IJCLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v36_n3_p1359_JacquesCoper

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Citas:

---------- APA ----------
Jacques-Coper, M., Brönnimann, S., Martius, O., Vera, C. & Cerne, B. (2016) . Summer heat waves in southeastern Patagonia: An analysis of the intraseasonal timescale. International Journal of Climatology, 36(3), 1359-1374.
http://dx.doi.org/10.1002/joc.4430
---------- CHICAGO ----------
Jacques-Coper, M., Brönnimann, S., Martius, O., Vera, C., Cerne, B. "Summer heat waves in southeastern Patagonia: An analysis of the intraseasonal timescale" . International Journal of Climatology 36, no. 3 (2016) : 1359-1374.
http://dx.doi.org/10.1002/joc.4430
---------- MLA ----------
Jacques-Coper, M., Brönnimann, S., Martius, O., Vera, C., Cerne, B. "Summer heat waves in southeastern Patagonia: An analysis of the intraseasonal timescale" . International Journal of Climatology, vol. 36, no. 3, 2016, pp. 1359-1374.
http://dx.doi.org/10.1002/joc.4430
---------- VANCOUVER ----------
Jacques-Coper, M., Brönnimann, S., Martius, O., Vera, C., Cerne, B. Summer heat waves in southeastern Patagonia: An analysis of the intraseasonal timescale. Int. J. Climatol. 2016;36(3):1359-1374.
http://dx.doi.org/10.1002/joc.4430