Estimation of the Fractional Coverage of Rainfall in Climate Models
The fraction of the grid cell area covered by rainfall, μ, is a very important parameter in the descriptions of land surface hydrology in climate models. A simple procedure is presented for estimating this fraction, based on extensive observations of storm areas and rainfall volumes. It is often obs...
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| Veröffentlicht in: | Journal of climate 1993-04, Vol.6 (4), p.639-644 |
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| container_title | Journal of climate |
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| creator | Eltahir, E. A. B. Bras, R. L. |
| description | The fraction of the grid cell area covered by rainfall, μ, is a very important parameter in the descriptions of land surface hydrology in climate models. A simple procedure is presented for estimating this fraction, based on extensive observations of storm areas and rainfall volumes. It is often observed that storm area and rainfall volume are linearly related. This relation is utilized in rainfall measurement to compute rainfall volume from radar observations of the storm area. The authors suggest that the same relation be used to compute the storm area from the volume of rainfall simulated by a climate model. A formula is developed for computing μ, which describes the dependence of the fractional coverage of rainfall on the season of the year, the geographical region, rainfall volume, spatial resolution of the model, and the temporal resolution of the model. The new formula is applied in computing μ over the Amazon region. Significant temporal variability in the fractional coverage of rainfall is demonstrated. The implications of this variability for the modeling of land surface hydrology in climate models are discussed. |
| doi_str_mv | 10.1175/1520-0442(1993)006<0639:eotfco>2.0.co;2 |
| format | Article |
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The new formula is applied in computing μ over the Amazon region. Significant temporal variability in the fractional coverage of rainfall is demonstrated. The implications of this variability for the modeling of land surface hydrology in climate models are discussed.</description><identifier>ISSN: 0894-8755</identifier><identifier>EISSN: 1520-0442</identifier><identifier>DOI: 10.1175/1520-0442(1993)006<0639:eotfco>2.0.co;2</identifier><language>eng</language><publisher>Legacy CDMS: American Meteorological Society</publisher><subject>Climate models ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Hydrological modeling ; Hydrology ; Meteorology ; Meteorology And Climatology ; Meteors ; Rain ; Simulations ; Spatial models ; Storms ; Temporal resolution ; Volume ; Water in the atmosphere (humidity, clouds, evaporation, precipitation)</subject><ispartof>Journal of climate, 1993-04, Vol.6 (4), p.639-644</ispartof><rights>Copyright 1993, American Meteorological Society (AMS)</rights><rights>1993 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26197292$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26197292$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,3668,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4778092$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Eltahir, E. A. B.</creatorcontrib><creatorcontrib>Bras, R. L.</creatorcontrib><title>Estimation of the Fractional Coverage of Rainfall in Climate Models</title><title>Journal of climate</title><description>The fraction of the grid cell area covered by rainfall, μ, is a very important parameter in the descriptions of land surface hydrology in climate models. A simple procedure is presented for estimating this fraction, based on extensive observations of storm areas and rainfall volumes. It is often observed that storm area and rainfall volume are linearly related. This relation is utilized in rainfall measurement to compute rainfall volume from radar observations of the storm area. The authors suggest that the same relation be used to compute the storm area from the volume of rainfall simulated by a climate model. A formula is developed for computing μ, which describes the dependence of the fractional coverage of rainfall on the season of the year, the geographical region, rainfall volume, spatial resolution of the model, and the temporal resolution of the model. The new formula is applied in computing μ over the Amazon region. Significant temporal variability in the fractional coverage of rainfall is demonstrated. The implications of this variability for the modeling of land surface hydrology in climate models are discussed.</description><subject>Climate models</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Hydrological modeling</subject><subject>Hydrology</subject><subject>Meteorology</subject><subject>Meteorology And Climatology</subject><subject>Meteors</subject><subject>Rain</subject><subject>Simulations</subject><subject>Spatial models</subject><subject>Storms</subject><subject>Temporal resolution</subject><subject>Volume</subject><subject>Water in the atmosphere (humidity, clouds, evaporation, precipitation)</subject><issn>0894-8755</issn><issn>1520-0442</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><sourceid>CYI</sourceid><recordid>eNqNUV1LHDEUDdKC27X_wMI8SNGHWW--JkkrBRl2raAsFH0OmcydOjJObDIW_PeddGVfW_JwCefjXs4h5JzCilIlz6lkUIIQ7JQaw88AqguouPmCYep8-MZWsPLhKzsgiz3zHVmANqLUSspD8iGlRwDKKoAFqddp6p_c1IexCF0xPWCxic7nvxuKOvzG6H5ihn64fuzcMBT9WNRD1mBxG1oc0hF5PwMJP77NJbnfrO_q7-XN9uq6vrwpvRBqKhvTSNM0noNTbaupEo4KY7pOgeSSe9AtkyiRSsF520jHWuQGOsM0E4jIl-Tzzvc5hl8vmCb71CePw-BGDC_Jsmp-XJj_IUpd0eqfRKoZrfR8z5Jc7Yg-hpQidvY5zhHEV0vB5lpsDtvmsG2uxc612FyLXW_vNvXWMgs2j9np5G2lS94NXXSj79PeTiilwWTa8Y42uuTsOMX01xdASs7z4Z928GOaQtyrWUWNYrP8Dwgdock</recordid><startdate>19930401</startdate><enddate>19930401</enddate><creator>Eltahir, E. A. B.</creator><creator>Bras, R. L.</creator><general>American Meteorological Society</general><scope>CYE</scope><scope>CYI</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>19930401</creationdate><title>Estimation of the Fractional Coverage of Rainfall in Climate Models</title><author>Eltahir, E. A. B. ; Bras, R. 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L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Estimation of the Fractional Coverage of Rainfall in Climate Models</atitle><jtitle>Journal of climate</jtitle><date>1993-04-01</date><risdate>1993</risdate><volume>6</volume><issue>4</issue><spage>639</spage><epage>644</epage><pages>639-644</pages><issn>0894-8755</issn><eissn>1520-0442</eissn><abstract>The fraction of the grid cell area covered by rainfall, μ, is a very important parameter in the descriptions of land surface hydrology in climate models. A simple procedure is presented for estimating this fraction, based on extensive observations of storm areas and rainfall volumes. It is often observed that storm area and rainfall volume are linearly related. This relation is utilized in rainfall measurement to compute rainfall volume from radar observations of the storm area. 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| ispartof | Journal of climate, 1993-04, Vol.6 (4), p.639-644 |
| issn | 0894-8755 1520-0442 |
| language | eng |
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| source | Jstor Complete Legacy; American Meteorological Society; NASA Technical Reports Server; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Climate models Earth, ocean, space Exact sciences and technology External geophysics Hydrological modeling Hydrology Meteorology Meteorology And Climatology Meteors Rain Simulations Spatial models Storms Temporal resolution Volume Water in the atmosphere (humidity, clouds, evaporation, precipitation) |
| title | Estimation of the Fractional Coverage of Rainfall in Climate Models |
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