@InProceedings{KouskyJanoJoyc:2006:DiCyPr,
author = "Kousky, Vernon E. and Janowiak, John E. and Joyce, Robert",
affiliation = "{NOAA/ Climate Prediction Center}",
title = "The Diurnal Cycle of Precipitation over South America based on
CMORPH",
booktitle = "Proceedings...",
year = "2006",
editor = "Vera, Carolina and Nobre, Carlos",
pages = "1113--1116",
organization = "International Conference on Southern Hemisphere Meteorology and
Oceanography, 8. (ICSHMO).",
publisher = "American Meteorological Society (AMS)",
address = "45 Beacon Hill Road, Boston, MA, USA",
keywords = "diurnal cycle, precipitation.",
abstract = "The diurnal cycle of precipitation over the region of South
America is examined using high spatial and temporal resolution
analyses that have been produced by NOAAs Climate Prediction
Center morphing technique (CMORPH) (Joyce et al. 2004). The 8-km
spatial resolution (at the equator) and 30-minute temporal
resolution of these analyses permit an in-depth look at the
diurnal cycle of precipitation. Major features of the summertime
diurnal cycle, as depicted by CMORPH for the South American
Monsoon, include an afternoon maximum in precipitation over the
Andes and the high terrain in central and eastern Brazil, a
nocturnal maximum in precipitation over areas just east of the
Andes (western Argentina, central Bolivia and western Paraguay),
and a nocturnal maximum over the Atlantic Ocean in the vicinity of
the South Atlantic Convergence Zone (Fig. 1). A remarkable diurnal
cycle in precipitation occurs in coastal areas of northern and
northeastern South America. With daytime heating, precipitation
rapidly develops along and just inland from the coast (Fig. 1,
lower left panel), probably related to the sea breeze. This
precipitation advances westward and southward, producing a
nocturnal maximum in areas approximately 500 km inland from the
coast. The inland propagation of sea-breeze-induced rainfall
systems is a feature most frequently found during late SH summer
(December-February) and fall (March-May). The seasonal average
diurnal cycle for equatorial South America (Eq. 5ºN) for March-May
2003 indicates that sea-breeze-induced precipitation systems
propagate westward, reaching the western Amazon Basin in about two
days. As these systems propagate inland they contribute to a
nocturnal precipitation maximum in some areas and a diurnal
precipitation maximum in other areas. A nocturnal or early morning
precipitation maximum also occurs along the immediate coast and
offshore in the vicinity of the Atlantic ITCZ and over the Pacific
near the west coast of South America. The seasonality of the
diurnal cycle will also be included in this presentation.",
conference-location = "Foz do Igua{\c{c}}u",
conference-year = "24-28 Apr. 2006",
language = "en",
organisation = "American Meteorological Society (AMS)",
ibi = "cptec.inpe.br/adm_conf/2005/10.03.10.43",
url = "http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.03.10.43",
targetfile = "1113-1116.pdf",
type = "Monsoon systems and continental rainfall",
urlaccessdate = "05 maio 2024"
}