3 edition of note on relationships between western Sahel rainfall and U.S. hurricane activity found in the catalog.
note on relationships between western Sahel rainfall and U.S. hurricane activity
Stanley Lawrence Rosenthal
by U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Atlantic Oceanographic and Meteorological Laboratory, For sale by the National Technical Information Service in Miami, Fla, Springfield, VA
Written in English
|Statement||Stanley L. Rosenthal|
|Series||NOAA technical memorandum ERL AOML -- 68|
|Contributions||Atlantic Oceanographic and Meteorological Laboratories|
|The Physical Object|
|Pagination||iii, 18 p. ;|
|Number of Pages||18|
The relationship between summer African easterly waves (AEWs) and daily rainfall is assessed in West Africa for – using various reanalyses, satellite-derived rainfall products, and a regional climate model (RCM) run at and km resolutions. 3–5 and 6–9 day AEWs are extracted by filtering daily hPa meridional wind time series at 1°W and °N, and 1°W and °N Cited by: The Sahel region is in sub-Saharan Africa and is a transition zone between the arid Sahara desert to the north and the tropical green forest to the south, covering a surface area of million Km2 with a population of about 60 million inhabitants.
The Sahel, here defined as the portion of Africa between 12°N and 20°N, is a semi-arid eco-region that separates the Sahara desert from the Sudanian tropical savanna. Historical rainfall measurements (–) from Easington, a town located km to the northeast of Grape Tree Pond (Fig. 2a), demonstrate that more than 75% of average annual precipitation falls at the study site during the hurricane season (June-November; Fig. 2e) compared with 50% of average annual precipitation for Jamaica (Fig. 2b).Very little precipitation occurs outside of the Cited by:
- there is a direct relationship between the intensity (central pressure) of the most intense hurricanes and the temperature of the sea-surface over which the storms are moving. - note from the following table that the six strongest hurricanes all occurred in the western . to global warming.3–5 In this study, the relationship between the LOS and tropical cyclone activity and climate is examined for the weather satellite era, ––8 Estimates are also given for the LOS and LSD, as well as for the expected number of tropical cyclones (NTC), the total number of.
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Note on relationships between western Sahel rainfall and U.S. hurricane activity (OCoLC) Material Type: Government publication, National government publication, Internet resource: Document Type: Book, Internet Resource: All Authors / Contributors: Stanley Lawrence Rosenthal; Atlantic Oceanographic and Meteorological Laboratory.
Correlations between the Western Sahel precipitation index and ACE in the warmest 28 years minus correlations between the Western Sahel precipitation index and ACE in the coldest 28 years, based on detrended SST data. The apparent recent breaking of the year Sahel drought during and suggests that the incidence of intense hurricanes making landfall on the U.S.
coast and in the Caribbean basin will likely increase during the s and early years of the 21st century to levels of activity notably greater than were observed during the s and by: Abstract.  Sea surface temperature (SST) anomalies in the tropical Atlantic have been associated with precipitation anomalies in West Africa that form a dipole pattern with centers over the Sahel and the Gulf of Guinea.
Whilst this was clear before the 's, the dipole pattern almost disappeared after that date. The interannual and decadal to multidecadal variability of precipitation in western Sahel region was examined using wavelet transform and coherency analysis.
The aim was to identify the major climate index that has a robust relationship with Sahel precipitation (drought).Cited by: 4.
If these anomalies persist, as they did inhurricane activity that ducks into the Subtropics could find supportive energetic and wind shear conditions on approach to the U.S. : Ryan Truchelut. Consider that, up until Katrina, Hurricane Andrew was the costliest hurricane in U.S.
history. But it occurred in an inactive year; there were only 7 hurricanes and tropical storms. Data on U.S. landfalling storms is only about 2 tenths of one percent of data we have on global hurricanes over their whole lifetimes.
Thus while we can already detect trends in data for global hurricane activity considering the. Notably, rainfall in region 5 is much more highly correlated (r = ) with the difference between SSTs in the eastern equatorial Atlantic and western equatorial Indian Oceans (10°E–coast, 2°–16°S, coast–56°E, and 2°–14°S).
This indicates a simultaneous control of both oceans on rainfall in this by: The number of hurricane landfalls in the three coastal regions shows a clear pattern of interannual variability ().A total of 53 hurricanes made landfall along the East Coast between andwith 18 making landfall during the 25 ENSO cold events, 10 during the 23 warm events, and 25 during the 57 neutral events ().Landfalls along the East Coast show clear active and inactive periods Cited by: Strong Relationship between Dry-Season Rainfall over West Africa and Extratropical Disturbance Fig.
1 The map of West Africa region as defined by latitude 5°° N and longitude 17° W° E. Gray box marks the study area. Fig. 2 The GPCP-accumulated rainfall (mm), shading depicts rainfall amount (mm) according to scale at the sideFile Size: 2MB.
To investigate the links between hurricane activity and climate, this study has constructed a long-term record of intense hurricane activity in the western. Though the Sahel is currently experiencing a multidecadal drought, the relationship between Atlantic tropical cyclones and Western Sahel rainfall is not dependent upon the similar downward trends in both data sets.
A detrended analysis confirms that a strong association still exists. Recent evidence has suggested an even closer relationship between the Sahel rainfall and the Atlantic Multidecadal Oscillation (AMO)—a basin-scale pattern of SST variability driven by Atlantic meridional by: A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.
Figure 8depicts the scatter plot of the Western Sahel rainfall--intense hurricane days relationship, where 58 percent of the variance between the two are explained by a linear regression.
Note that except for named storms, all parameters are significant beyond the. The Sahel occupies a transitional zone between the Sahara to the north and tropical rain forests to the south. As for many such transitional zones adjacent to tropical rain belts, climate is highly variable due to the sharp gradients in rainfall.
In the ’s and ’s, the region experienced. Sahel precipitation was above the long-term mean from through the late s and during the ss, after which it was persistently below the longterm mean, with the largest negative anomalies in the early s.
A note on relationships between western Sahel rainfall and U.S. hurricane activity [microform] / Stanle A thermal front circulation model [microform] / Messon B. Gbah, Guy A. Meadows, Stanley J. Jacobs; The variability of surface-air temperature and precipitation at.
Exploring Relationships between Rainfall and Vegetation Dynamics in the Sahel Using Coarse Resolution Satellite Data S.M.
Herrmanna,*, A. Anyambab, C.J. Tuckerc aOffice of Arid Land Studies, University of Arizona, Tucson, AZUSA ([email protected]) bGoddard Earth Sciences Technology Centre, University of Maryland, Baltimore County - ([email protected]).
Again, because of the strong concurrent correlation between Atlantic tropical cyclone activity and seasonal Sahel rainfall, this June and July western Sahel rainfall provides an excellent precursor signal for about to commence hurricane activity, particularly the expected intense hurricane activity to follow in the August through October period.
Start studying World Geo ch 20 reivew. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. What is the average annual rainfall in the Sahel? inches ( cm) Which trading empire in the western part of the Transition Zone was overtaken by the Moroccans during the 15th century?
Songhai Empire. Atlantic tropical cyclone activity is known to oscillate between multi-annual periods of high and low activity. These changes have been linked to the Atlantic multidecadal oscillation (AMO), a mode of variability in Atlantic sea surface temperature which modifies the large-scale conditions of the tropical Atlantic.
Cyclone activity is also modulated at higher frequencies by a series of other Cited by: National Hurricane Center ().
United States, National Oceanic and Atmospheric Administration.