Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

This paper presents a statistical study of the spatial and seasonal distribution and duration of cut-off low systems over the southern South American region based on the NCEP- NCAR reanalysis data for the period 1979-1988. Cut-off lows were first objectively determined as minimum geopotential values at the 250 hPa level and then subjectively imposing a cut-off circulation and a cold core. A total of 171 cut-off low events were detected, being more frequent in austral autumn followed by winter, spring and summer. There is a preferential region of occurrence in spring and autumn located between 68°-80° W and 30°-45° S. The Pacific area showed the greatest frequency of occurrence followed by the Atlantic and the continental areas. Most of the cut-off lows last 2 or 3 days (around 90% of the cases) though there is a tendency of the continental events to be longer. The cut-off low event developed upwind the Andes on 22-28 September 1986 was selected as a case study. Low-level cold air advection was the main forcing of the deepening of the upper level low system. © Springer-Verlag 2006.

Registro:

Documento: Artículo
Título:Upper-level cut-off lows in southern South America
Autor:Campetella, C.M.; Possia, N.E.
Filiación:Departamento de Ciencias de la Atmósfera y los Océanos, Universidad de Buenos Aires, Centro de Investigaciones del Mar y la Atmósfera - CONICET/UBA, Buenos Aires, Argentina
Palabras clave:geopotential; low pressure system; spatial distribution; statistical analysis; South America
Año:2007
Volumen:96
Número:1-2
Página de inicio:181
Página de fin:191
DOI: http://dx.doi.org/10.1007/s00703-006-0227-2
Título revista:Meteorology and Atmospheric Physics
Título revista abreviado:Meteorol. Atmos. Phys.
ISSN:01777971
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01777971_v96_n1-2_p181_Campetella

Referencias:

  • Ancellet, G., Beekmann, M., Papayiannis, A., Impact of a cut-off development on downward transport of ozone in the stratosphere (1994) J Geophys Res, 99, pp. 3451-3463. , 10.1029/93JD02551
  • Bell, G., Bosart, L., A 15-year climatology of Northern Hemisphere 500 mb closed cyclone and anticyclone centers (1989) Mon Wea Rev, 117, pp. 2142-2163. , 10.1175/1520-0493(1989)117<2142:AYCONH>2.0.CO;2
  • Berbery, H., Vera, C., Characteristics of Southern Hemisphere winter storm track with filtered and unfiltered data (1996) J Atmos Sci, 53, pp. 468-481. , 10.1175/1520-0469(1996)053<0468:COTSHW>2.0.CO;2
  • Davies, T.D., Schuepbach, E., Episodes of high ozone concentrations at the earth surface resulting from transport down from the upper troposphere-lower stratosphere: Review and case studies (1994) Atmos Environ, 28, pp. 53-68. , 10.1016/1352-2310(94)90022-1
  • Garreaud, R., Ruttland, J., Fuenzalida, H., Coastal lows along the Subtropical West Coast of South America: Mean structure and evolution (2002) Mon Wea Rev, 130, pp. 75-88. , 10.1175/1520-0493(2002)130<0075:CLATSW>2.0.CO;2
  • Kalnay, E., The NCEP/NCAR 40-Year Reanalysis Project (1996) Bull Amer Meteor Soc, 77, pp. 437-471. , and Coauthors
  • Kentarchos, A.S., Davies, T., A climatology of cut-off lows at 200 hPa in the Northern Hemisphere, 1990-1994 (1998) Int J Climatol, 18, pp. 379-390. , 10.1002/(SICI)1097-0088(19980330)18:4<379::AID-JOC257>3.0.CO;2-F
  • Nieto, R., Gimeno, L., de la Torre, L., Ribera, P., Gallego, D., García-Herrera, R., García, J.A., Lorente, J., Climatological features of cutoff low systems in the Northern Hemisphere (2005) J Climate, 108, pp. 3085-3103. , 10.1175/JCLI3386.1
  • Palmen, E., Newton, C.W., (1969) Atmospheric Circulation Systems: Their Structure and Physical Interpretation, p. 602. , Academic Press New York
  • Pizarro, J., Montecinos, A., Cut-off cyclones off the subtropical coast of Chile (2000) Preprints 6th Int. Conf. on Southern Hemisphere Meteorology and Oceanography, pp. 278-279
  • Vera, C., Vigliarolo, P., Berbery, H., Cold season synoptic-scale waves over subtropical South America (2002) Mon Wea Rev, 130, pp. 684-699. , 10.1175/1520-0493(2002)130<0684:CSSSWO>2.0.CO;2

Citas:

---------- APA ----------
Campetella, C.M. & Possia, N.E. (2007) . Upper-level cut-off lows in southern South America. Meteorology and Atmospheric Physics, 96(1-2), 181-191.
http://dx.doi.org/10.1007/s00703-006-0227-2
---------- CHICAGO ----------
Campetella, C.M., Possia, N.E. "Upper-level cut-off lows in southern South America" . Meteorology and Atmospheric Physics 96, no. 1-2 (2007) : 181-191.
http://dx.doi.org/10.1007/s00703-006-0227-2
---------- MLA ----------
Campetella, C.M., Possia, N.E. "Upper-level cut-off lows in southern South America" . Meteorology and Atmospheric Physics, vol. 96, no. 1-2, 2007, pp. 181-191.
http://dx.doi.org/10.1007/s00703-006-0227-2
---------- VANCOUVER ----------
Campetella, C.M., Possia, N.E. Upper-level cut-off lows in southern South America. Meteorol. Atmos. Phys. 2007;96(1-2):181-191.
http://dx.doi.org/10.1007/s00703-006-0227-2