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タイトルDetecting air pollution stress in southern California vegetation using Landsat Thematic Mapper band data
著者(英)Price, Curtis V.; Westman, Walter E.
著者所属(英)NASA Ames Research Center|TGS Technology, Inc.
発行日1988-09-01
言語eng
内容記述Landsat Thematic Mapper (TM) and aircraft-borne Thematic Mapper simulator (TMS) data were collected over two areas of natural vegetation in southern California exposed to gradients of pollutant dose, particularly in photochemical oxidants: the coastal sage scrub of the Santa Monica Mountains in the Los Angeles basin, and the yellow pine forests in the southern Sierra Nevada. In both situations, natural variations in canopy closure, with subsequent exposure of understory elements (e.g.,rock or soil, chaparral, grasses, and herbs), were sufficient to cause changes in spectral variation that could obscure differences due to visible foliar injury symptoms observed in the field. TM or TMS data are therefore more likely to be successful in distinguishing pollution injury from background variation when homogeneous communities with closed canopies are subjected to more severe pollution-induced structural and/or compositional change. The present study helps to define the threshold level of vegetative injury detectable by TM data.
NASA分類EARTH RESOURCES AND REMOTE SENSING
レポートNO88A53530
権利Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/368725


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