descriptions of in situ and satellite datasets. The mentation, and links to over 700 earth science serv- GCMD online search interfaces enable earth sci- ers. There is also a global change calendar where entists to locate datasets and to share their own re- users can track science conferences, meetings, sym- sults. The database includes descriptions of datasets posia, and workshops having relevance to global covering climate change, the biosphere, hydro- change. Links are provided to other calendars as well. sphere and oceans, geology, geography, and hu- The GCMD is the American coordinating node man dimensions of global change. of the Committee on Earth Observation Satellites Through search interfaces, users can freely (CEOS) International Directory Network (IDN). search the GCMD database. The resulting data The CEOS IDN is an international effort to assist records provide information on the nature of the researchers in locating information on available data (e.g., parameters measured, geographic loca- datasets. tion, time range) and where the data are stored. For The URL for the GCMD Web site is http:// those who want to include descriptions of their own gcmd.nasa.gov. Contact NASA official Lola Olsen datasets, the GCMD provides a dataset registration with any questions regarding the site or send e-mail tool, which is free and provides a means to inter- to firstname.lastname@example.org. Questions regarding sci- national recognition. ence assistance should be directed to the GCMD science staff. Send inquiries to gcmduso@ The Web site also features GCMD project news, gcmd.nasa.gov. • an FTP area for downloading software and docu- Weather Modification Summary The National Oceanic and Atmospheric pal districts, one university, and a power Administration has released its first periodic company. report on weather modification activities in the Silver iodide proved to be United States covering a period from 1 No- the most frequently used seed- vember 1972-22 March 1973. Under the ing agent. In 21 projects, seed- Public Law 92-205 of 1971 all non-federal ing materials were introduced weather modification projects conducted fro m generators on the within the U.S. and its territories must be re- ground, while aircraft were ported to the Secretary of Commerce (see BUL- used in six other projects to LETIN, 54 , 29). dispense the various materials. During the period covered in the report 27 Only the colder months of the year are in- weather modification projects were reported, cluded in the first summary, which points out of which 11 occurred in Oklahoma, seven in that the number of projects will probably be California, two each in Washington and Idaho, greater in warmer months, thus that the first and one each in Arkansas, Montana, Oregon, report is only a partial picture of annual Utah, and Wyoming. Nearly three-fourths of weather modification activities in the U.S. the projects were conducted to increase the Titled "Weather Modification Activity Re- rain or snowfall, and the remainder to dispel ports—November 1, 1972, to March 22, fog at airports. Projects were sponsored by 1973," by Mason T. Charak and Mary T. community associations, municipal districts, DiGiulian, the publication is available from cities, countries, airlines and airport authori- NOAA, Office of Environmental Modifica- ties, power companies, universities, and pri- tion, Rockville, Md. 20852. vate companies or individuals. Actual opera- tions were conducted by 10 commercial weather modification concerns, three munici- Bull Amer. Meteor. Soc. 79, 881. Bulletin of the American Meteorological Society 1747
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Aug 1, 1998
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