alexa An Analysis of Recent Rainfall Conditions in West Africa, Including the Rainy Seasons of the 1997 El Niño and the 1998 La Niña Years
Social & Political Sciences

Social & Political Sciences

Journal of Political Sciences & Public Affairs

Author(s): S E Nicholson, B Some, B Kone

Abstract Share this page

This article examines recent rainfall conditions throughout the Sahel and in other parts of West Africa in detail and presents an overview of changes in rainfall on timescales of decades for Africa as a whole. In West Africa, there has been a pattern of continued aridity since the late 1960s that is most persistent in the more western regions. Some recovery occurred in the easternmost sectors during the 1990s, with rainfall in some years being near or just above the long-term mean. Dry conditions continued during 1997, but that year was not unusually dry compared to others of the last two decades. Hence, it appears that the 1997 El Niño did not have a large impact in the region. A preliminary analysis suggests that in 1998 rainfall was still below the long-term mean in most of the Sahel, but the central Sahel of Niger experienced localized flooding due to high rainfall in September. Throughout the region, the wettest years of the last decades were 1978, 1988, 1994, and possibly 1998, but conditions in even these years exceeded the long-term mean in only a few sectors. A long-term change in rainfall has occurred in the semiarid and subhumid zones of West Africa. Rainfall during the last 30 yr (1968–97) has been on average some 15% to 40% lower than during the period 1931–60. A similar but smaller change has occurred in semiarid and subhumid regions of southern Africa.

This article was published in Journal of Climate and referenced in Journal of Political Sciences & Public Affairs

Relevant Expert PPTs

Relevant Speaker PPTs

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

[email protected]

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

[email protected]

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001 Extn: 9042

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords