Long-term global distribution of Earth's shortwave radiation budget at the top of atmosphere

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dc.contributor.authorHatzianastassiou, N.en
dc.contributor.authorFotiadi, A.en
dc.contributor.authorMatsoukas, C.en
dc.contributor.authorPavlakis, K. G.en
dc.contributor.authorDrakakis, E.en
dc.contributor.authorHatzidimitriou, D.en
dc.contributor.authorVardavas, I.en
dc.date.accessioned2015-11-24T18:42:09Z
dc.date.available2015-11-24T18:42:09Z
dc.identifier.issn1680-7324-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/17737
dc.rightsDefault Licence-
dc.subjectgeneral-circulation modelen
dc.subjectdata setsen
dc.subjectsolar-radiationen
dc.subjectsatellite-observationsen
dc.subjectcloud climatologyen
dc.subjectexperiment erbeen
dc.subjectenergy-balanceen
dc.subjectland-surfaceen
dc.subjectgcmen
dc.subjectdataseten
dc.titleLong-term global distribution of Earth's shortwave radiation budget at the top of atmosphereen
heal.abstractThe mean monthly shortwave ( SW) radiation budget at the top of atmosphere (TOA) was computed on 2.5degrees longitude-latitude resolution for the 14-year period from 1984 to 1997, using a radiative transfer model with long-term climatological data from the International Satellite Cloud Climatology Project (ISCCP-D2) supplemented by data from the National Centers for Environmental Prediction - National Center for Atmospheric Research (NCEP-NCAR) Global Reanalysis project, and other global data bases such as TIROS Operational Vertical Sounder (TOVS) and Global Aerosol Data Set ( GADS). The model radiative fluxes at TOA were validated against Earth Radiation Budget Experiment (ERBE) S4 scanner satellite data ( 1985 - 1989). The model is able to predict the seasonal and geographical variation of SW TOA fluxes. On a mean annual and global basis, the model is in very good agreement with ERBE, overestimating the outgoing SW radiation at TOA (OSR) by 0.93 Wm(-2) (or by 0.92%), within the ERBE uncertainties. At pixel level, the OSR differences between model and ERBE are mostly within +/- 10Wm(-2), with +/- 5Wm(-2) over extended regions, while there exist some geographic areas with differences of up to 40 Wm(-2), associated with uncertainties in cloud properties and surface albedo. The 14-year average model results give a planetary albedo equal to 29.6% and a TOA OSR flux of 101.2 Wm(-2). A significant linearly decreasing trend in OSR and planetary albedo was found, equal to 2.3 Wm(-2) and 0.6% ( in absolute values), respectively, over the 14-year period ( from January 1984 to December 1997), indicating an increasing solar planetary warming. This planetary SW radiative heating occurs in the tropical and sub-tropical areas (20degreesS - 20degrees N), with clouds being the most likely cause. The computed global mean OSR anomaly ranges within +/- 4Wm(-2), with signals from El Nino and La Nina events or Pinatubo eruption, whereas significant negative OSR anomalies, starting from year 1992, are also detected.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.secondary<Go to ISI>://000223066300001-
heal.journalNameAtmospheric Chemistry and Physicsen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2004-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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