Journal ArticleDOI
A Simple Model of El Niño and the Southern Oscillation
Reads0
Chats0
TLDR
In this article, a model of tropical ocean-atmosphere interaction is used to study the El Nino-Southern Oscillation phenomenon, where the model ocean consists of the single baroclinic mode of a two-layer ocean.Abstract:
A model of tropical ocean-atmosphere interaction is used to study the El Nino–Southern Oscillation phenomenon. The model ocean consists of the single baroclinic mode of a two-layer ocean. The thermodynamics of the upper layer are highly parameterized; sea-surface temperature is assigned one of two values, warm or cool, according to whether the interface is shallower or deeper than an externally specified depth. The model atmosphere consists of two wind patches of zonal stress that are idealizations of the annual cycle of the equatorial trades, τs, and of Bjerknes' Walker circulation, τw. When the eastern ocean is in its cool state both patches drive the ocean; when it is warm τw is switched off. Solutions compare favorably with observations in several ways. Most importantly, for reasonable choices of parameters solutions oscillate at the long time scales associated with the Southern Oscillation. The response of the ocean to τw introduces positive feedback into the system, with the result that the...read more
Citations
More filters
Journal ArticleDOI
Possible impacts of Indian Ocean Dipole mode events on global climate
N. H. Saji,Toshio Yamagata +1 more
TL;DR: In this paper, the impact of Indian Ocean Dipole mode (IOD) events on global climate is estimated by correlation/regression analysis, and strong correlation is found over Europe, northeast Asia, North and South America and South Africa concurrent with IOD events.
Journal ArticleDOI
Observations of long Rossby waves in the northern tropical Pacific
TL;DR: In this article, a model of low-frequency quasi-geostrophic pycnocline variability allows the physical processes of Ekman pumping, the radiation of long (nondispersive) Rossby waves due to such pumping in midbasin, and the radiation from the observed eastern boundary depth fluctuations is found in variations of the depth of the 20°C isotherm in the northern tropical Pacific during 1970-1987.
Book ChapterDOI
Understanding Enso Physics—A Review
Chunzai Wang,Joël Picaut +1 more
TL;DR: Several negative feedbacks have been proposed to terminate the growth of warm SST anomalies in the equatorial eastern and central Pacific, including wave reflection at the ocean western boundary, a discharge process due to Sverdrup transport, a western Pacific wind-forced Kelvin wave of opposite sign, and anomalous zonal advection as mentioned in this paper.
Journal ArticleDOI
El Niño, Interannual Variability and Fisheries in the Northeast Pacific Ocean
TL;DR: The oceanic and atmospheric observations, physical mechanisms, and theories associated with El Nino – Southern Oscillation warming episodes in the tropical Pacific are described, and the means by which these anomalous events are believed to produce unusual conditions in the northeast Pacific are critically examined.
Journal ArticleDOI
Characteristics and Variations of the East Asian Monsoon System and Its Impacts on Climate Disasters in China
TL;DR: In this paper, the authors discussed how the interaction and relationships among various components of the EAM system can be described through the East Asia Pacific (EAP) teleconnection patterns and the teleconnection pattern of meridional upper-tropospheric wind anomalies along the westerly jet over East Asia.