Download or read book The Maintenance and Propagation of African Easterly Waves Across Northern Africa written by Katie Ellen Robertson and published by . This book was released on 2004 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: wave, MCC, AEW, African Easterly Waves, mesoscale convective complexes.
Download or read book The Maintenance and Propagation of African Easterly Waves Across Northern Africa A Case Study and Analysis of the Environment written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on the formation and maintenance of an African Easterly Wave (AEW) that developed over Northern Africa in 2000. Specifically, the pre-development period of Hurricane Alberto that initially formed over the Ethiopian Highlands (EH) region is studied in conjunction with this AEW disturbance. Based on EUMETSAT infrared (IR) satellite imagery and ECMWF 0.5o observational model (EOM) analysis data, we identified four convective genesis periods (G-I, G-II, G-III, and G-IV) and three lysis periods (L-I, L-II, and L-III). Based on the EOM analysis of the pre-Alberto system, we found that moisture and vertical velocity played a major role in the generation and maintenance of the convective cycles associated with the pre-Alberto system as it traveled westward across Northern Africa. Initially, orographic effects induce vertical velocity and moisture, and as the Alberto system travels westward these parameters are governed more by environmental factors. The National Center for Atmospheric Research (NCAR) Regional Climate Model Version 3.0 (henceforth RegCM3) was used to run the control case and several sensitivity simulations. We found that the EH is important for focusing and organizing AEW features by producing a consistent stationary wave mode, generating lee side vorticity, and initially providing sufficient vertical moisture flux for convection. PBL effects over the EH cause the initial convection in response to diurnal diabetic heating. As this convection propagates downstream, it merges with the orographically generated MV on the lee of the EH and a MCC results. PBL effects and moisture availability are important for propagating and maintaining AEW disturbances as they travel to the west and supporting sufficient moisture by allowing for surface moisture fluxes to affect these systems and aid in convective development. The AEW is slightly modulated by orography downstream from the EH region. Both the EH region and the PBL effects are essential in th.
Download or read book The Generation Maintenance and Propagation of the Pre helene African Easterly Wave and Mesoscale Convective System Over Africa written by James Spinks and published by . This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigates the origin of the mesoscale convective system (MCS) and the African easterly wave (AEW) over the African continent which triggered hurricane Helene in 2006. Looks at the environmental factors that played a role in aiding the pre-Helene AEW-MCS as well as conducting an in-depth examination of the splitting-advecting-merging mechanism observed with the pre-Helene AEW-MCSs. Investigates the origin and propagation of the pre-Helene MCS and AEW by using satellite imagery and results simulated by the weather research and forecasting (WRF) model.
Download or read book The Origin and Structure of Easterly Waves in the Lower Troposphere of North Africa written by Robert W. Burpee and published by . This book was released on 1971 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction Between the African Waves and the African Easterly Jet written by Jung-Chieh Hsieh and published by . This book was released on 2003 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: African waves are the major synoptic system over North Africa in the summer. Previous studies have reported that African waves could be distinguished into the two different waves (African easterly waves and Burpee waves) on either side of the African easterly jet. Burpee waves (BWs) have been studied by numerous researchers, therefore, they are well known in the literature. In contrast, African easterly waves (AEWs) are not understood very well, due to the lack of data gathered over the desert. Previous studies have reported that vertical structures of the AEW is shallow near the surface on the north side of the jet. However, they do not explain the shallow structure of AEWs. Thus, the first objective of this study was to explore the limited height of AEWs by analyzing NCEP reanalysis data. According to these results, the mid-level high over North Africa plays an important role in limiting the height of AEWs. In addition, vorticity budget and streamfunction budget analysis indicate the vortex stretching term is the major dynamic process for vertical development and limitation of AEWs at the low and mid levels. Previous studies have mentioned the African jet is also weakened by African waves, but they did not explain the real-time interaction between them. Therefore, the second objective of this study was to explore the interaction between the jet and the wave. The results of Fourier analysis indicate the relationship between the perturbation and the jet depends on the relative positions between them. Vorticity budget analysis also indicates that zonal vorticity advection is an important term for perturbation on the south side of the jet to develop rotation to increase the jet. In contrast, the planetary vorticity advection is the key dynamic process enabling AEWs to develop on the north side of the jet, causing it to weaken.
Download or read book Climatology Study of African Easterly Waves and Mesoscale Convective Systems in Northern Africa 2004 2006 written by Wilson M. Jones (Jr.) and published by . This book was released on 2009 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Easterly Waves on the Patterns of Precipitation in Tropical Northern Africa written by Robert W. Burpee and published by . This book was released on 1976 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dryland Climatology written by Sharon E. Nicholson and published by Cambridge University Press. This book was released on 2011-10-27 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of dryland climates and their relationship to the physical environment, vegetation, hydrology, and inhabitants. Packed with photographs and an extensive review of the primary literature, this is a unique interdisciplinary resource for researchers, environmental professionals and advanced students in fields from climatology to geomorphology.
Download or read book Forests Water and People in the Humid Tropics written by M. Bonell and published by Cambridge University Press. This book was released on 2009-12-17 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forests, Water and People in the Humid Tropics is a comprehensive review of the hydrological and physiological functioning of tropical rain forests, the environmental impacts of their disturbance and conversion to other land uses, and optimum strategies for managing them. The book brings together leading specialists in such diverse fields as tropical anthropology and human geography, environmental economics, climatology and meteorology, hydrology, geomorphology, plant and aquatic ecology, forestry and conservation agronomy. The editors have supplemented the individual contributions with invaluable overviews of the main sections and provide key pointers for future research. Specialists will find authenticated detail in chapters written by experts on a whole range of people-water-land use issues, managers and practitioners will learn more about the implications of ongoing and planned forest conversion, while scientists and students will appreciate a unique review of the literature.
Download or read book Generation of African Easterly Waves written by Jen-Shan Hsieh and published by . This book was released on 2005 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book African Easterly Waves written by Bryce Paul Tyner and published by . This book was released on 2011 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 24th Conference on Hurricanes and Tropical Meteorology written by and published by . This book was released on 2000 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Weather Review written by and published by . This book was released on 1992 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation of African Easterly Waves in the Community Climate System Model CCSM written by Evan M. Blaisdell and published by . This book was released on 2002 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Half Century of Progress in Meteorology written by Richard Johnson and published by Springer. This book was released on 2015-03-30 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through a series of reviews by invited experts, this monograph pays tribute to Richard Reed's remarkable contributions to meteorology and his leadership in the science community over the past 50 years. It is a recollection of Reed’s life and his observations of the world of international science.
Download or read book Meteorology of Tropical West Africa written by Douglas J. Parker and published by John Wiley & Sons. This book was released on 2017-04-24 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meteorology of tropical West Africa: the Forecasters’ Handbook presents the science and practice of weather forecasting for an important region of the tropics. Connecting basic theory with forecasting practice, the book provides a unique training volume for operational weather forecasters, and is also suitable for students of tropical meteorology. The West African region contains a number of archetypal climatic zones, meaning that the science of its weather and climate applies to many other tropical regions. West Africa also exhibits some of the world’s most remarkable weather systems, making it an inspiring region for students to investigate. The weather of West Africa affects human livelihoods on a daily basis, and can contribute to hardship, poverty and mortality. Therefore, the ability to understand and predict the weather has the potential to deliver significant benefits to both society and economies. The book includes comprehensive background material alongside documentation of weather forecasting methods. Many examples taken from observations of West African weather systems are included and online case-studies are referenced widely.
Download or read book Analysis of African Easterly Waves and Associated Convection Using a Non hydrostatic Limited area Model written by Susanne Bachner and published by . This book was released on 2002 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
