Weather forecasting is the most visible branch of meteorology and has its modern roots in the nineteenth century when scientists redefined meteorology in the way weather forecasts were made, developing maps of isobars, or lines of equal atmospheric pressure, as the main forecasting tool. This book is the history of how weather forecasting was moulded and modelled by the processes of nation-state building and statistics in the Western world.

In this book, Robert Marc Friedman analyzes the revolution in the theory and practice of meteorology during the first quarter of the twentieth century, initiated by Vilhelm Bjerknes (1862–1951) and his collaborators. In contrast to the approach that had dominated meteorology since the late nineteenth century, their weather models and forecasting techniques marked a decisive turn to a dynamical–physical understanding of the atmosphere. Using a wide range of sources, both published and unpublished, Friedman traces the emergence of the new, so-called Bergen methodology and the process by which it transformed first Norwegian and then worldwide weather forecasting. The establishment of the new meteorology, he argues, was the result of a complaex interaction of scientific, social, and technological factors, and he gives special emphasis to the way in which Bjerknes adapted his mechanical physics of the atmosphere to benefit commercial purposes. By providing more reliable forecasts for farmers, fishermen, and especially for aviators, Bjerknes was able to nurture a school of disciples that could evert a profound influence on the international meteorological community, thereby increasing his own authority and that of the discipline he sought to shape. Friedman does an unusually subtle job of integrating the often opposing methods of the history and the sociology of science. He explains in detail how Bjerknes, a theoretical physicist, and his collaborators developed a new model of cyclone evolution and the first clear physical explanation of how weather happens. At the same time, Friedman demonstrates how conceptual change was interconnected with the Bergen school's striving to obtain political support at home and to dominate professional meteorology abroad. Appropriating the Weather is an invaluable contribution to our understanding of the processes in which scientific, institutional, and social factors interact to form scientific disciplines. It deserves wide readership among historians and sociologists of science and science policy makers, as well as meteorologists and other geophysical scientists. Winner of the Louis J. Battan Author's Award (American Meteorological Society) Winner of the Jehuda Neumann Memorial Prize for History (Royal Meteorological Society) One of eight classics of 20th-century continental European history of science (Isis, History of Science Society)

During the course of this century, meteorology has become unified, physics-based, and highly computational. Calculating the Weather: Meteorology in the 20th Century explains this transformation by examining thevarious roles of computation throughout the history of meteorology, giving most attention to the period from World War I to the 1960s. The electronic digital computer, a product of World War II, led to great advances in empirical, theoretical, and practical meteorology. At the same time, the use of the computer led to the discovery of so-called"chaotic systems,"and to the recognition that there may well be fundamental limits to predicting the weather.One of the very few books covering 20th century meteorology, this text is an excellent supplement to any course in general meteorology, forecasting, or history of science.Key Features* Provides a narrative account of the growth of meteorology in the 20th century* Explains how forecasting the weather became a physics-based science* Studies the impact of the computer on meteorology and thus provides an example of science transformed by the computer* Describes three traditions in meteorology:* The empirical tradition of gathering data and making inferences* A theoretical tradition of explaining atmospheric motions by means of the laws of physics* The practical tradition of predicting the weather* Analyzes the increasing role of calculation within each of the traditions and explains how electronic digital computers made possible many connections between traditions

Jesuits established a large number of astronomical, geophysical and meteorological observatories during the 17th and 18th centuries and again during the 19th and 20th centuries throughout the world. The history of these observatories has never been published in a complete form. Many early European astronomical observatories were established in Jesuit colleges. During the 17th and 18th centuries Jesuits were the first western scientists to enter into contact with China and India. It was through them that western astronomy was first introduced in these countries. They made early astronomical observations in India and China and they directed for 150 years the Imperial Observatory of Beijing. In the 19th and 20th centuries a new set of observatories were established. Besides astronomy these now included meteorology and geophysics. Jesuits established some of the earliest observatories in Africa, South America and the Far East. Jesuit observatories constitute an often forgotten chapter of the history of these sciences.