The Hadley and Walker Circulations are fundamental regulators of the Earth's energy budget. Although the Hadley Circulation is a well-known concept, surprisingly little attention has been paid to understanding both short and long-term variability of the system. This book reviews current knowledge of Hadley and Walker circulation dynamics and their interactions with the major global monsoon systems, and evaluates paleoclimatic records within the domain of the Hadley Circulation that shed light on past variability of climate over the last 1000 years, the Holocene (the last 11,500 years), glacial periods, and warm climate periods in the past. The book examines potentially important factors that may have affected the Hadley and Walker Circulations on these different time scales and evaluates changes in the Hadley Circulation and the monsoons as simulated by coupled models of past climate conditions, and predicted future conditions under an enhanced greenhouse effect. This book is meant to serve as a fundamental reference work for current and future researchers, graduate students in the atmospheric sciences and geosciences, and climate specialists involved in interdisciplinary research.
From the reviews: "This book aims to address the nature and causes of variation in the Hadley circulation ! . The great strength of this book lies in the combination of its three parts. It succeeds in combining 17 contributions from authoritative climatologists, palaeoclimatologists and modellers into a coherent volume. ! Overall, this is a superb book, which should be on all university bookshelves. It will be of value to researchers and students over a broad range of climate-related disciplines." (Gerard van der Schrier, The Holocene, Vol. 16 (4), 2006)
Acknowledgements, Preface, Contributing authors, The Hadley Circulation: an introduction.- Section A The Role of the Hadley Cell in the Atmospheric Circulation.- 1. The elementary Hadley Circulation.- 2. Hadley Circulation dynamics.- 3. Changes in the Tropical Hadley Cell since 1950.- 4. The shape of continents, air-sea interaction, and the rising branch of the Hadley Circulation.- 5. Year-to-year variability in the Hadley and Walker Circulations from NCEP/NCAR reanalysis data.- 6. ENSO, Atlantic climate variability, and the Walker and Hadley Circulations.- 7. The Hadley and Walker regional circulations and associated ENSO impacts on south American seasonal rainfall.- Section B Variability of the Hadley Circulation in the Past.- 8. The Pacific sector Hadley and Walker Circulations in historical marine wind analyses.- 9. Holocene records of rainfall variation and associated ITCZ migration from stalagmites from northern and southern Oman.- 10. Evolution of the Indo-Pacific warm pool and Hadley-Walker Circulation since the last deglaciation.- 11. Late quaternary hydrologic changes in the arid and semiarid belt of northern Africa.- 12. Variability of the Marine ITCZ over the eastern Pacific during the past 30,000 years.- 13. Mount Logan ice core evidence for changes in the Hadley and Walker Circulations following the end of the little ice age.- Section C Causes of variability in the Hadley Circulation.- 14. The response of the Hadley Circulation to climatic changes, past and future.- 15. The sensitivity of the Hadley Circulation to past and future forcings in two climate models.- 16. Present-day climate variability in the tropical Atlantic.- 17. Mechanisms of an intensified Hadley Circulation in response to solar forcing in the twentieth century.
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