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RISNocturnal Continental Low-Level Stratus over Tropical West Africa: Observations and Possible Mechanisms Controlling Its Onset
Publisher: American Meteorological Society
Abstract: ome spatiotemporal characteristics and possible mechanisms controlling the onset of the widespread, low-level nocturnal stratiform clouds that formed during May?October 2006 over southern tropical West Africa are investigated ...
Use of a Rain Gauge Network to Infer the Influence of Environmental Factors on the Propagation of Quasi-Linear Convective Systems in West Africa
Publisher: American Meteorological Society
Abstract: The West African squall line is a key quasi-linear storm system that brings much of the precipitation observed in the data-poor Sudanian climate zone. Squall lines propagate at a wide range of speeds and headings, but the ...
Tropical Convection on 7–21-Day Timescales over the Western Pacific
Publisher: American Meteorological Society
Abstract: Evidence is presented to demonstrate that the oscillations of convection on 7?21-day timescales are an important component of the intraseasonal variability over the region spanning the equatorial western Pacific to the ...
On the Potential Causes of the Nonstationary Correlations between West African Precipitation and Atlantic Hurricane Activity
Publisher: American Meteorological Society
Abstract: For years, various indices of seasonal West African precipitation have served as useful predictors of the overall tropical cyclone activity in the Atlantic Ocean. Since the mid-1990s, the correlation unexpectedly deteriorated. ...
Subtropical Jet Streaks over the South Pacific
Publisher: American Meteorological Society
Abstract: The main objective of this study is to obtain a better understanding of the upper-tropospheric subtropical westerly wind maxima over the Australian?South Pacific region in the summer half of the year, which have been ...
High- and Low-Frequency Intraseasonal Variance of OLR on Annual and ENSO Timescales
Publisher: American Meteorological Society
Abstract: Using 20 yr of outgoing longwave radiation observations, the complex behavior of the higher- (6?25-day) and lower- (25?70-day) frequency bands of tropical intraseasonal convective oscillations is investigated. Emphasis is ...
Statistical Properties of Episodes of Enhanced 2–3-Day Convection in the Indian and Pacific Oceans
Publisher: American Meteorological Society
Abstract: Using 9 yr of IR brightness temperature values as a proxy for tropical convection, the climatology and statistics of the 2?3-day convective oscillation signal are examined. These higher-frequency oscillations are shown to ...
Recent Climatology of Kinematic Variables in the TOGA-COARE Region
Publisher: American Meteorological Society
Abstract: The importance of the ?warm pool? region of the western Pacific on in situ and global-scale circulations has gained wide recognition in the last decade with the advent of TOGA and, more recently, with the field experiment ...
Three MCS Cases Occurring in Different Synoptic Environments in the Sub-Sahelian Wet Zone during the 2002 West African Monsoon
Publisher: American Meteorological Society
Abstract: Three mesoscale convective systems (MCSs) occurring in the sub-Sahelian wet zone of West Africa are examined using observations from the 2002 Integrated Approach to the Efficient Management of Scarce Water Resources in ...