{ "item_title" : "The Rotation of the Earth", "item_author" : [" Walter H. Munk", "Gordon J. F. MacDonald", "Munk Walter H. "], "item_description" : "This book gives an account of certain observed irregularities on the rotation of the Earth, both in its rate of rotation (giving a variable length of day) and in the position of its axis. These irregularities are caused by events on and within the Earth and provide a means of studying a number of geophysical problems. Seasonal shifts in air masses and variable winds are causes of short-period fluctuations in the rotation. Climatic changes and their attendant sea levels are in part responsible for long-term fluctuations. Modern observations of the Moon and descriptions of ancient elipses both establish a secular increase in the length of day. The interpretation involves atmospheric, oceanic and bodily tides. The book provides a unified treatment of the rotation of the Earth, making this method of studying geophysical phenomena more readily accessible to geophysicists and others.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/0/52/110/406/0521104068_b.jpg", "price_data" : { "retail_price" : "77.00", "online_price" : "77.00", "our_price" : "77.00", "club_price" : "77.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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