Preliminary results from the ESA STSE project on SST diurnal variability, its regional extent and implications in atmospheric modelling (SSTDV:R.EX.–IM.A.M.)

Ioanna Karagali, Charlotte Bay Hasager, Jacob L. Høyer

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    Abstract

    This study presents some preliminary results of the ESA Support To Science Element (STSE) funded project on the Diurnal Variability of the Sea Surface Temperature, regarding its Regional Extend and Implications in Atmospheric Modelling (SSTDV:R.EX.–IM.A.M.). Comparisons of SEVIRI SST with AATSR show zero biases and standard deviations around 0.5 K mostly in the Tropics where SEVIRI is found colder. Sensitivity tests on the methodology to derive foundation temperature fields show that using only quality 5 SEVIRI data results in warmer foundation fields while there is an added 0.2 K variability when using multi-day composites. Diurnal warming signals exceeding 2 K are identified in the European Seas but also in the mid-latitudes of the North and South Atlantic as well as in areas with strong currents. In the attempt to connect temperature measurements from satellites and in situ instruments, the 1-dimensional General Ocean Turbulence Model (GOTM) is applied. Preliminary results show that the initial temperature and salinity profiles may give a warmer start-up in the model while the light extinction scheme is a controlling factor for the amplitude and vertical extend of the daily signal.
    Original languageEnglish
    Title of host publicationESA Living Planet Symposium
    Number of pages8
    PublisherEuropean Space Agency
    Publication date2013
    Publication statusPublished - 2013
    EventESA Living Planet Symposium - Edinburgh, United Kingdom
    Duration: 9 Sept 201313 Sept 2013

    Conference

    ConferenceESA Living Planet Symposium
    Country/TerritoryUnited Kingdom
    CityEdinburgh
    Period09/09/201313/09/2013

    Keywords

    • SST
    • Diurnal variability
    • GOTM

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