Global geographical databases for modelling trace gas fluxes |
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| Authors: | Elaine Matthews |
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| Institution: | Hughes STX Corporation, NASA-Goddard Institute for Space Studies , 2880 Broadway, New York, New York 10025, U.S.A. |
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| Abstract: | Abstract The design and development of global digital databases and their integrated use in studies of terrestrial sources and sinks of trace gases are discussed. Generic design characteristics that expand the utility of these databases are outlined including: hierarchical classification systems that provide for encoding and accessing data at several levels of detail, and fine spatial and thematic resolution which accommodate adaptations to a broad base of applications. The discussion follows the sequence of (1) developing primary databases on major surface characteristics, (2) selectively integrating combinations of data bases to produce secondary data sets of source categories, and (3) combining information on source categories with fluxes to produce tertiary data sets of emissions. These procedures are demonstrated with the example of estimating and evaluating alternative global methane emissions from natural wetlands. |
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| Keywords: | Land use change Logistic regression Interdisciplinary research Scale Philippines |
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