Affiliation:
1. New York University, New York, New York
Abstract
Abstract
A number of studies suggest a two-way feedback between convectively coupled Kelvin waves (CCKWs) and the intertropical convergence zone (ITCZ). Viewed here as a proxy for deep convection, analysis of brightness temperature data reveals several aspects of these interdependencies. A wavenumber–frequency spectral analysis is applied to the satellite data in order to filter CCKWs. The ITCZ is characterized by a region of low brightness temperature and a proxy for both the ITCZ location and width are defined. The phase speed of CCKW data is determined using the Radon transform method. Linear regression techniques and probability density analysis are consistent with previous theoretical predictions and observational results. In particular, the fastest waves are found when the ITCZ is the farthest from the equator and the narrowest. Conversely, the slowest waves coincide with broad ITCZs that are located near the equator.
Publisher
American Meteorological Society
Reference35 articles.
1. Applied Smoothing Techniques for Data Analysis;Bowman,1997
2. Convectively coupled waves propagating along an equatorial ITCZ;Dias;J. Atmos. Sci.,2009
3. On large-scale circulations in convecting atmospheres;Emanuel;Quart. J. Roy. Meteor. Soc.,1994
4. Large scale dynamics of precipitation fronts in the tropical atmosphere: A novel relaxation limit;Frierson;Commun. Math. Sci.,2004
5. Atlas of highly reflective clouds for the global tropics: 1971–1983;Garcia,1985
Cited by
30 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献