In the zonal mean, the ITCZ lies at the foot of the ascending branch of the tropical mean meridional circulation, close to where the near-surface meridional mass flux vanishes. The ITCZ also lies near the energy flux equator (EFE), where the column-integrated meridional energy flux vanishes. This latter observation makes it possible to relate the ITCZ position to the energy balance, specificall...

To evaluate the performance of a high-resolution atmospheric model (HiRAM) and to improve our understanding climatic impacts ENSO forcing associated teleconnections, we analyzed AMIP-style HiRAM simulations conducted effectively at 25 km grid spacing. better assess response climate variability; categorized it into strong weak El Niño/La Niña episodes. The reproduced over global scale very well,...

In the tropical Atlantic Ocean, Intertropical Convergence Zone (ITCZ) is an important climate feature controlled by interhemispheric sea surface temperature (SST) gradient, and greatly influences rainfall patterns over adjacent continents. To better understand ITCZ dynamics in context of past future change, long-term oceanic records are needed, but observational data limited temporal extent. Sh...

Abstract. The intertropical convergence zone (ITCZ) is an important component of the tropical rain belt. Climate models continue to struggle adequately represent ITCZ and differ substantially in its simulated response climate change. Here we employ complex network approaches, which extract spatiotemporal variability patterns from data, better understand differences dynamics state-of-the-art glo...

Title of Document: INTERANNUAL VARIABILITY OF SEA SURFACE TEMPERATURE IN THE EASTERN TROPICAL PACIFIC OCEAN AND CENTRAL AMERICAN RAINFALL Kristopher B. Karnauskas, Ph.D., 2007 Directed By: Professor Antonio J. Busalacchi Department of Atmospheric and Oceanic Science Sea surface temperature (SST) in the east Pacific warm pool (EPWP) plays a potentially important role in Central American rainfall...

Abstract. The spurious double Intertropical Convergence Zone (ITCZ) is one of the most prominent systematic biases in coupled atmosphere–ocean general circulation models (CGCMs), and underestimated marine stratus over eastern subtropical oceans has been recognized as a possible contributor. Rather than modifying cloud scheme itself, this study significantly ameliorates simulation through improv...

The primary natural source of water for the Hass avocado crop in tropics is precipitation. However, this insufficient to provide most crops’ requirements due spatial and temporal variability. This study aims demonstrate that requires irrigation Colombia, done by analyzing dynamics local precipitation regimes influence Intertropical Convergence Zone phenomena (ITCZ) on requirement (IR). was carr...

Global Climate Models (GCMs) exhibit substantial biases in their simulation of tropical climate. One particularly problematic bias exists GCMs' the rainband known as Intertropical Convergence Zone (ITCZ). Much precipitation on Earth falls within ITCZ, which plays a key role setting Earth's temperature by affecting global energy transports, and partially dictates dynamics largest interannual mod...

An analysis of atmospheric energy transport in 22 years (1980–2001) of the 40-yr ECMWF Re-Analysis (ERA-40) is presented. In the analyzed budgets, there is a large cancellation between divergences of dry static and latent energy such that the total energy divergence is positive over all tropical oceanic regions except for the east Pacific cold tongue, consistent with previous studies. The west ...

Atmospheric dust levels may play important roles in feedbacks linking continental source areas, tropical convection, marine productivity, and global climate. These feedbacks appear to be particularly significant in the tropical Pacific, where variations in local convection and productivity have been demonstrated to have impacts on climate at higher latitudes. Modeling of past dust levels and re...