Composite patterns of easterly disturbances over West Africa and the tropical Atlantic: a climatology from the 1979–95 NCEP/NCAR reanalyses |
| |
Authors: | A Diedhiou S Janicot A Viltard P de Félice |
| |
Institution: | (1) IRD/LTHE, BP 53, 38041, Grenoble Cedex 9, France E-mail: diedhiou@hmg.inpg.fr, FR;(2) METEO-France, D2 C/MAV/MP, 75340, Paris Cedex 7, France, FR;(3) Université Paris XII/LMD (CNRS), 91128, Palaiseau, France, FR |
| |
Abstract: | The horizontal and vertical structure of the 3–5-day and 6–9-day easterly waves over West Africa and tropical Atlantic are
investigated. NCEP/NCAR reanalyses are used for the period 1979–1995 to produce a 17-year climatology of both 3–5-day and
6–9-day easterly waves. Composite patterns of convection, wind, temperature and vertical velocity are analysed with respect
to the following: the modulation by 3–5-day and 6–9-day wave regimes; the contrasts between the ITCZ (5°N–10°N) and the Sahelo-Saharan
band (15°N–20°N); the difference between land and ocean, and seasonal variations. Similarities and differences in the characteristics
of the two wave regimes are identified.
Received: 18 August 1999 / Accepted: 14 March 2001 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|