Results 171 to 180 of about 6,160 (207)

Organized Convection Parameterization for the ITCZ*

Journal of the Atmospheric Sciences, 2015
Abstract Mesoscale convective systems (MCSs) are of fundamental importance in the dynamics of the atmospheric circulation and the climate system. They are often observed to develop over significant terrain in ambient shear flows in midlatitudes and embedded within the Madden–Julian oscillation (MJO) and convectively coupled equatorial ...
Boualem Khouider, Mitchell W. Moncrieff
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A Satellite-derived Climatology of the ITCZ

Journal of Climate, 1993
This paper presents fundamental climatological characteristics of the intertropical convergence zone (ITCZ) in a simple concise manner using the highly reflective cloud (HRC) dataset. This satellite-derived dataset uses both visible and infrared observations to measure the frequency of occurrence of large-scale convective systems over the global ...
Duane E. Waliser, Catherine Gautier
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Barotropic Aspects of ITCZ Breakdown

Journal of the Atmospheric Sciences, 1997
Abstract In satellite images the ITCZ (intertropical convergence zone) is sometimes observed to undulate and break down into a series of tropical disturbances. Tropical cyclones may later develop within these disturbances and move into higher latitudes allowing the ITCZ to reform.
Rosana Nieto Ferreira, Wayne H. Schubert
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Double ITCZs

Journal of Geophysical Research: Atmospheres, 2001
This study examines where and when double InterTropical Convergence Zones (ITCZs) exist and whether double ITCZs, defined in terms of monthly precipitation distributions, are significant climatological features in the tropics. The most identifiable double ITCZ is found over the eastern Pacific during boreal spring, mainly in March and April.
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Quantifying the ITCZ using wind convergence

2021
<p>The intertropical convergence zone (ITCZ) expresses itself as a band of strong convection around the equator with associated heavy precipitation. The ITCZ migrates annually to the warmer hemisphere, and the extent to which it ventures away from the equator varies from year to year and across the different oceans and continents.
Lea Elsemüller, Bedartha Goswami
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Double and Single ITCZs with and without Clouds

Journal of Climate, 2017
A major bias in tropical precipitation over the Pacific in climate simulations stems from the models’ tendency to produce two strong distinct intertropical convergence zones (ITCZs) too often. Several mechanisms have been proposed that may contribute to the emergence of two ITCZs, but current theories cannot fully explain the bias.
Max Popp, Levi G. Silvers
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Precipitation resonance for an idealized ITCZ model

2022
Tropical convection is known to self-organize under the diurnal cycle, yet is also subject to large scale convergence. In a suite of idealized numerical experiments we mimic Earth’s tropical circulation, to probe the cross talk between inherent circulation eigenmodes and the convective diurnal cycle — which generally are characterized by incommensurate
Jan O Haerter, Romain Fiévet
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Why the ITCZ Is Mostly North of the Equator

Journal of Climate, 1996
Abstract Although the distribution of sunshine is symmetrical about the equator, the earth's climate is not. Climatic asymmetries are prominent in the eastern tropical Pacific and Atlantic Oceans where the regions of maximum sea surface temperature, convective cloud cover, and rainfall are north of the equator. This is the result of two sets of factors:
S. G. H. Philander, D. Gu, G. Lambert, T. Li, D. Halpern, N-C. Lau, R. C. Pacanowski   +6 more
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Abrupt Seasonal Migration of the ITCZ into the Summer Hemisphere

Journal of the Atmospheric Sciences, 2008
AbstractAlthough the maximum of solar radiation at the top of the atmosphere moves gradually from one hemisphere to the other as part of the seasonal cycle, the intertropical convergence zone (ITCZ) moves abruptly into the summer hemisphere. An axisymmetric circulation model is developed to study this rapid transition.
Peng Xian, Ron L. Miller
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The Southeast Pacific Warm Band and Double ITCZ

Journal of Climate, 2010
Abstract The east Pacific double intertropical convergence zone (ITCZ) in austral fall is investigated with particular focus on the growing processes of its Southern Hemisphere branch. Satellite measurements from the Tropical Rainfall Measuring Mission (TRMM) and Quick Scatterometer (QuikSCAT) are analyzed to derive 8-yr climatology from
Hirohiko Masunaga, Tristan S. L’Ecuyer
openaire   +1 more source