About the Book and the Author

This comprehensive text on the physics and dynamics of the earth's atmosphere covers a wide range of topics of interest not only to professional meteorologists but also scientists of several allied disciplines,such as oceanography, geology, geophysics, environmental sciences, etc, desirous of securing a working knowledge of our atmosphere and how it works.and what it means to life on earth. It relates how solar radiation received at the earth's surface together with the heat exchanged between the surface and the overlying atmosphere produces heat sources and sinks in the earth-atmosphere system and how the atmosphere and the ocean are set in motion by the differential heating on different time and space scales to neutralize the imbalance so created and restore the balance of mass and energy. Wind systems and circulations set up in the process include not only the general circulation but also perturbations in the form of waves and oscillations, such as Kelvin waves, Inertio-gravity waves, ElNino - Southern Oscillation, Madden-Julian Oscillation, Quasi-biennial Oscillation, etc. Written by an expert in atmospheric science in an easy-to-understand style, each topic is developed from first principles and brought up-to-date to the extent practicable keeping in view the size of the book. It is bound to appeal to a large circle of readers from an average undergraduate student of science to seasoned professionals.

A Doctorate in Physics (meteorology) from the University of Calcutta (now kolkata) in India in 1956, Kshudiram Saha, born 1918, received his school, college and university education in India and graduated from the University of Allahabad in physics in 1940. He joined the Indian meteorological service in I942. During the war and till 1961, he served as a meteorological officer with the Indian Air Force. He returned to Indian Meteorological Service in 1962, and joined the WMO-sponsored newly-established Institute of Tropical Meteorology (which later became the Indian Institute of Tropical Meteorology) in Poona in 1964 where he served first as Head of the Forecasting Research Division and later as Director of the Institute. During his tenure in the Institute, he not only involved himself in carrying out original research work, but also acted as advisor to several dedicated young research colleagues who later made their mark in their respective fields of work. Singly and in collaboration with many of them, he published more than 60 original research papers on different aspects of tropical meteorology in peer-reviewed standard journals. He also visited several educational and research institutions in U.S.A. and acted as member of several advisory groups of the WMO during this period. He retired from his position as Director of the Institute in 1976.

Dr. Saha has continued his research work in meteorology even after retirement from office, as evident from his recent publications. While he worked as an Emeritus scientist with the Council of Scientific and Industrial Research in India after retirement, he was invited by MIT Cambridge as a Visiting Scientist, in 1978, to work on a problem of monsoon depressions with Professors Shukla and Sanders. In November 1980, he was awarded a Senior Research Associateship by the U.S. National Academy of Sciences National Research Council to work at the Naval Post-graduate School, Monterey, California, where he collaborated with Professor C.-P.Chang in further studies of monsoon problems. He has been a Life Fellow of the Royal Meteorological Society, London, since 1946; a Professional (now Emeritus) Member of the American Meteorological Society, since 1947; a Life Fellow of the Indian Meteorological Society, since 1976; and a Foundation Fellow of the Maharashtra Academy of Sciences, also since 1976. Now in his late eighties, he is still active in the field of meteorology. His educational and scientific background and knowledge and vast experience in the field of atmospheric science over a period of more than half a century make him eminently qualified to write this book.

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Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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