{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,21]],"date-time":"2025-09-21T16:54:34Z","timestamp":1758473674741},"reference-count":15,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"4471","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Science"],"published-print":{"date-parts":[[1980,11,14]]},"abstract":"<jats:p>Twenty spectra of Io (0.26 to 0.33 micrometer), acquired with the International Ultraviolet Explorer spacecraft, have been studied. There is a strong ultraviolet absorption shortward of 0.33 micrometer that is consistent with earlier ground-based spectrophotometry; its strength is strongly dependent on Io's rotational phase angle at the time of observation. This spectral feature and its variation are interpreted as indicative of a longitudinal variation in the distribution of sulfur dioxide frost on Io. The frost is most abundant at orbital longitudes 72\u00b0 to 137\u00b0 and least abundant at longitudes 250\u00b0 to 323\u00b0. Variations in spectral reflectivity between 0.4 and 0.5 micrometer, reported in earlier ground-based spectral studies, correlate inversely with variations in reflectivity between 0.26 and 0.33 micrometer. It is concluded that this is because the Io surface component with the highest visible reflectivity (sulfur dioxide frost) has the lowest ultraviolet reflectivity. At least one other component is present and may be sulfur allotropes or alkali sulfides. This model is consistent with ground-based ultraviolet, visible, and infrared spectrophotometry. Comparison with Voyager color photographs indicates that the sulfur dioxide frost is in greatest concentration in the \"white\" areas on Io and the other sulfurous components are in greatest concentration in the \"red\" areas.<\/jats:p>","DOI":"10.1126\/science.210.4471.784","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T17:45:58Z","timestamp":1160070358000},"page":"784-786","source":"Crossref","is-referenced-by-count":73,"title":["Io: Longitudinal Distribution of Sulfur Dioxide Frost"],"prefix":"10.1126","volume":"210","author":[{"given":"Robert M.","family":"Nelson","sequence":"first","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arthur L.","family":"Lane","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dennis L.","family":"Matson","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fraser P.","family":"Fanale","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Douglas B.","family":"Nash","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Torrence V.","family":"Johnson","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"221","reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1029\/GL002i010p00469","volume":"2","year":"1975","unstructured":"CARLSON, R.W., ELECTRON-IMPACT IONIZATION OF IOS SODIUM EMISSION CLOUD, GEOPHYSICAL RESEARCH LETTERS 2: 469 (1975).","journal-title":"GEOPHYSICAL RESEARCH LETTERS"},{"key":"e_1_2_1_2_1","doi-asserted-by":"crossref","first-page":"L89","DOI":"10.1086\/182800","volume":"225","year":"1978","unstructured":"CRUIKSHANK, D.P., ABSORPTION-BANDS IN SPECTRUM OF IO, ASTROPHYSICAL JOURNAL 225: L89 (1978).","journal-title":"ASTROPHYSICAL JOURNAL"},{"key":"e_1_2_1_3_1","doi-asserted-by":"crossref","first-page":"761","DOI":"10.1038\/280761a0","volume":"280","year":"1979","unstructured":"FANALE, F.P., SIGNIFICANCE OF ABSORPTION FEATURES IN IOS IR REFLECTANCE SPECTRUM, NATURE 280: 761 (1979).","journal-title":"NATURE"},{"key":"e_1_2_1_4_1","doi-asserted-by":"crossref","first-page":"799","DOI":"10.1029\/GL006i010p00799","volume":"6","year":"1979","unstructured":"HAPKE, B, IOS SURFACE AND ENVIRONS - 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A. Journal of Geophysical Research in press."}],"container-title":["Science"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.science.org\/doi\/pdf\/10.1126\/science.210.4471.784","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T03:29:35Z","timestamp":1705030175000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.science.org\/doi\/10.1126\/science.210.4471.784"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1980,11,14]]},"references-count":15,"journal-issue":{"issue":"4471","published-print":{"date-parts":[[1980,11,14]]}},"alternative-id":["10.1126\/science.210.4471.784"],"URL":"https:\/\/doi.org\/10.1126\/science.210.4471.784","relation":{},"ISSN":["0036-8075","1095-9203"],"issn-type":[{"value":"0036-8075","type":"print"},{"value":"1095-9203","type":"electronic"}],"subject":[],"published":{"date-parts":[[1980,11,14]]}}}