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RISThe Low-Level Structure of African Easterly Waves in 1995
Publisher: American Meteorological Society
Abstract: The existence of African easterly waves (AEWs) north of the African easterly jet (AEJ) core with maximum amplitude at low levels has been confirmed and clarified using radiosonde data and the U.K. Meteorological Office ...
A Dynamical Approach to Seasonal Prediction of Atlantic Tropical Cyclone Activity
Publisher: American Meteorological Society
Abstract: Analysis of ECMWF reanalyses and operational analyses covering the period between 1979?98 has confirmed that seasonal Atlantic tropical cyclone activity is strongly and negatively correlated with the observed vertical wind ...
Interannual-to-Multidecadal Variability of Vertical Shear and Tropical Cyclone Activity
Publisher: American Meteorological Society
Abstract: patiotemporal patterns of tropics-wide vertical shear variability are extracted after separating a 58-yr data record into high-frequency (HF, periods of 1.5?8 yr) and low-frequency (LF, periods greater than 8 yr) components. ...
African Easterly Wave Variability and Its Relationship to Atlantic Tropical Cyclone Activity
Publisher: American Meteorological Society
Abstract: Automatic tracking of vorticity centers in European Centre for Medium-Range Weather Forecasts analyses has been used to develop a 20-yr climatology of African easterly wave activity. The tracking statistics at 600 and 850 ...
The Extratropical Transitions of Hurricanes Felix and Iris in 1995
Publisher: American Meteorological Society
Abstract: The extratropical transitions of Hurricanes Felix and Iris in 1995 are examined and compared. Both systems affected northwest Europe but only Iris developed significantly as an extratropical system. In both cases the ...
Climatology of Vertical Wind Shear over the Tropical Atlantic
Publisher: American Meteorological Society
Abstract: The spatiotemporal variability of the 200?850-hPa vertical wind shear over the tropical Atlantic is examined for a period of 46 yr. This work extends and updates past studies by considering a longer data record as well as ...
Variability and Evolution of African Easterly Wave Structures and Their Relationship with Tropical Cyclogenesis over the Eastern Atlantic
Publisher: American Meteorological Society
Abstract: frican easterly waves (AEWs) are objectively tracked between West Africa and the tropical Atlantic based on the CFSRv2 data for 1979 to 2012. The characteristics of the troughs of the AEWs at the West African coast are ...
Case Study of an Intense African Easterly Wave
Publisher: American Meteorological Society
Abstract: The life cycle of an intense African easterly wave (AEW) over the African continent is examined using European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses, Meteosat satellite images, and synoptic ...
Representation of African Easterly Waves in CMIP5 Models
Publisher: American Meteorological Society
Abstract: frican easterly waves (AEWs) can act as seed disturbances for tropical cyclones (TCs) in the Atlantic, and changes in future AEW activity may have important consequences for development of TCs. The simulation of AEWs was ...
African Easterly Wave Dynamics in a Mesoscale Numerical Model: The Upscale Role of Convection
Publisher: American Meteorological Society
Abstract: o examine the dynamical role of convection in African easterly wave (AEW) life cycles the Weather Research and Forecasting (WRF) model is used to simulate the evolution of a single AEW from September 2004. The model ...