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TOPEX/POSEIDON is a satellite mission that will use the technique of radar altimetry to make precise measurement of sea level with a primary goal of studying the global ocean circulation . The mission represents the culmination of the development of satellite altimetry over the past two decades. The major thrust of the mission is a commitment to measuring seal level with an unprecedented accuracy such that the small-amplitude, basinwide sea level changes that bear significant effects on global change can be detected. The mission will be conducted jointly by the United States National Aeronautics and the Space Administration and the french space agency, Centre National d'Etudes Spatiales. The 3- to 5-year mission will study the long-term mean and variability of ocean circulation. This document provides brief descriptions of the planned investigation s as well as a summary of the major elements of the mission.
Understanding the effects of natural and human-induced changes on the global environment and their implications requires a foundation of integrated observations of land, sea, air and space, on which to build credible information products, forecast models, and other tools for making informed decisions. The 2007 National Research Council report on decadal survey called for a renewal of the national commitment to a program of Earth observations in which attention to securing practical benefits for humankind plays an equal role with the quest to acquire new knowledge about the Earth system. NASA responded favorably and aggressively to this survey, embracing its overall recommendations for Earth observations, missions, technology investments, and priorities for the underlying science. As a result, the science and applications communities have made significant progress over the past 5 years. However, the Committee on Assessment of NASA's Earth Science Program found that the survey vision is being realized at a far slower pace than was recommended, principally because the required budget was not achieved. Exacerbating the budget shortfalls, NASA Earth science programs experienced launch failures and delays and the cost of implementing missions increased substantially as a result of changes in mission scope, increases in launch vehicle costs and/or the lack of availability of a medium-class launch vehicle, under-estimation of costs by the decadal survey, and unfunded programmatic changes that were required by Congress and the Office of Management and Budget. In addition, the National Oceanic and Atmospheric Administration (NOAA) has made significant reductions in scope to its future Earth environmental observing satellites as it contends with budget shortfalls. Earth Science and Applications from Space: A Midterm Assessment of NASA's Implementation of the Decadal Survey recommends a number of steps to better manage existing programs and to implement future programs that will be recommended by the next decadal survey. The report also highlights the urgent need for the Executive Branch to develop and implement an overarching multiagency national strategy for Earth observations from space, a key recommendation of the 2007 decadal survey that remains unfulfilled.
Sea Level Rise, History and Consequences includes a special emphasis on the evidence for historical sea level change; case studies are used to demonstrate the resulting consequences. A CD-ROM is included which contain tide gauge data and trends of relative sea level from the Permanent Service for Mean Sea Level. The material on the CD-ROM is either in the form of text files, or web sites that can be opened by widely available web-browsers.Sea level is expected to rise as much as 60-100 centimeters over the next century due to greenhouse-induced global warming -- or at least that is what the some scientists predict. However, the concept of sea level is extremely complex, which makes the prediction of sea level rise anything but certain. The reviewers are in consensus in enthusiastically endorsing this comprehensive book and CD-ROM treatment. This book will be a comprehensive review of the subject using the data themselves (on CD-ROM) to illustrate the principles involved, rather than detailed mathematical treatments. The book should be readily accessible to upper division and first-year graduate students in the environmental sciences, geography, geology, and other interdisciplinary fields. Four pages (up to 16 pages) of color in the printed text.The book will have wide appeal. It will be read by geologists, geophysicists, climatologists, oceanographers, meteorologists, environmental scientists, geomorphologists, coastal engineers, and policy makers in all of these fields.

1986 NASA Authorization

United States. Congress. House. Committee on Science and Technology. Subcommittee on Transportation, Aviation, and Materials

Published: 1985

Total Pages: 1560


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