YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • AMS
    • Journal of Applied Meteorology
    • View Item
    •   YE&T Library
    • AMS
    • Journal of Applied Meteorology
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    A Combination of Microwave Observations from Satellites and an EOF Analysis to Retrieve Vertical Humidity Profiles over the Ocean

    Source: Journal of Applied Meteorology:;1990:;volume( 029 ):;issue: 011::page 1142
    Author:
    Wagner, D.
    ,
    Ruprecht, E.
    ,
    Simmer, C.
    DOI: 10.1175/1520-0450(1990)029<1142:ACOMOF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A semistatistical retrieval technique is presented to derive humidity profiles over the oceans from passive microwave measurements. The procedure is based upon the vertical empirical orthogonal functions (EOFs) of the specific humidity extracted from a large sample of radiosonde measurements over the North Atlantic Ocean during the period from April to October 1979 (FGGE-year). The North Atlantic is divided into seven regions and the EOF-analysis is carried out for each region separately. The first three eigenvectors of the EOF-expansion explain up to 90% of the total variability within each region and it is shown that they are statistically significant and stable. The eigenvectors of the first order mainly describe variations of the total precipitable water (W), while the second and third-order EOFs are related to the ratio WG/W, with WG as the precipitable water of the planetary boundary layer, and the sea surface temperature (SST), respectively. This fact is used to develop a technique for the estimation of atmospheric moisture profiles assuming that W, WG, and SST can be retrieved from satellite observations. A comparison of the SMMR (Nimbus-7) derived humidity profiles using only W as input data yields a retrieval accuracy of 0.9 g kg?1 in the surface layer and 1.4 g kg?1 at 800 hPa, which corresponds roughly with the top of the PBL. Above this layer the retrieval error falls off rapidly. Case studies demonstrate the capability of the algorithm to resolve typical structures of the humidity field, e.g., synoptic scale disturbances in midlatitudes or the intertropical convergence zone (ITCZ) in the tropics.
    • Download: (1.250Mb)
    • Show Full MetaData Hide Full MetaData
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      A Combination of Microwave Observations from Satellites and an EOF Analysis to Retrieve Vertical Humidity Profiles over the Ocean

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4146867
    Collections
    • Journal of Applied Meteorology

    Show full item record

    contributor authorWagner, D.
    contributor authorRuprecht, E.
    contributor authorSimmer, C.
    date accessioned2017-06-09T14:03:17Z
    date available2017-06-09T14:03:17Z
    date copyright1990/11/01
    date issued1990
    identifier issn0894-8763
    identifier otherams-11619.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4146867
    description abstractA semistatistical retrieval technique is presented to derive humidity profiles over the oceans from passive microwave measurements. The procedure is based upon the vertical empirical orthogonal functions (EOFs) of the specific humidity extracted from a large sample of radiosonde measurements over the North Atlantic Ocean during the period from April to October 1979 (FGGE-year). The North Atlantic is divided into seven regions and the EOF-analysis is carried out for each region separately. The first three eigenvectors of the EOF-expansion explain up to 90% of the total variability within each region and it is shown that they are statistically significant and stable. The eigenvectors of the first order mainly describe variations of the total precipitable water (W), while the second and third-order EOFs are related to the ratio WG/W, with WG as the precipitable water of the planetary boundary layer, and the sea surface temperature (SST), respectively. This fact is used to develop a technique for the estimation of atmospheric moisture profiles assuming that W, WG, and SST can be retrieved from satellite observations. A comparison of the SMMR (Nimbus-7) derived humidity profiles using only W as input data yields a retrieval accuracy of 0.9 g kg?1 in the surface layer and 1.4 g kg?1 at 800 hPa, which corresponds roughly with the top of the PBL. Above this layer the retrieval error falls off rapidly. Case studies demonstrate the capability of the algorithm to resolve typical structures of the humidity field, e.g., synoptic scale disturbances in midlatitudes or the intertropical convergence zone (ITCZ) in the tropics.
    publisherAmerican Meteorological Society
    titleA Combination of Microwave Observations from Satellites and an EOF Analysis to Retrieve Vertical Humidity Profiles over the Ocean
    typeJournal Paper
    journal volume29
    journal issue11
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1990)029<1142:ACOMOF>2.0.CO;2
    journal fristpage1142
    journal lastpage1157
    treeJournal of Applied Meteorology:;1990:;volume( 029 ):;issue: 011
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian