Remotely sensed sea surface thermal patterns in the Gulf of Cadiz and the Strait of Gibraltar

Variability, correlations, and relationships with the surface wind field

Andrew M. Folkard, Peter A. Davies, Armand F.G. Fiuza, Isabel Ambar

    Research output: Contribution to journalArticle

    52 Citations (Scopus)

    Abstract

    Satellite image sequences (covering periods of a few days throughout the annual cycle) of the waters off southern Iberia have been analyzed in conjunction with concurrent surface wind speed data from coastal stations. Qualitative analysis reveals a large degree of temporal and spatial variability in the thermal signature of the sea surface over periods of both a few days and several months. During the summer, a cool seasurface temperature signature extends from the western Iberian coast around Cape St. Vincent and eastward as far as Fare. At the same time, a warm signature originating on the Iberian coast between Faro and Cadiz extends into the Strait of Gibraltar. These two features are shown to sometimes adopt more westerly positions, and the strait experiences regions of cool thermal signature originating at its southern side. During winter, the surface flow into the Mediterranean through the Strait of Gibraltar is anomalously warm and appears to come from the interior of the Gulf of Cadiz. Quantitative measurements show that temporal variability over timescales of a few days at individual sites is maximum in midsummer. Spatial thermal variability over the whole region is found to peak toward the end of the summer. Statistical analyses of the data reveal the coupling between the surface wind field in the Gulf of Cadiz and the surface thermal pattern (especially during the summer). Wind-induced, across-stream upwelling in the Strait of Gibraltar, although dynamically subordinate to tidal and density-driven processes, is shown to occasionally dominate the surface thermal signature.

    Original languageEnglish
    Pages (from-to)5669-5683
    Number of pages15
    JournalJournal of Geophysical Research: Atmospheres
    Volume102
    Issue numberC3
    DOIs
    Publication statusPublished - 15 Mar 1997

    Keywords

    • ALBORAN SEA
    • FEATURES
    • MEDITERRANEAN-SEA
    • DYNAMICS
    • CIRCULATION

    Cite this

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    title = "Remotely sensed sea surface thermal patterns in the Gulf of Cadiz and the Strait of Gibraltar: Variability, correlations, and relationships with the surface wind field",
    abstract = "Satellite image sequences (covering periods of a few days throughout the annual cycle) of the waters off southern Iberia have been analyzed in conjunction with concurrent surface wind speed data from coastal stations. Qualitative analysis reveals a large degree of temporal and spatial variability in the thermal signature of the sea surface over periods of both a few days and several months. During the summer, a cool seasurface temperature signature extends from the western Iberian coast around Cape St. Vincent and eastward as far as Fare. At the same time, a warm signature originating on the Iberian coast between Faro and Cadiz extends into the Strait of Gibraltar. These two features are shown to sometimes adopt more westerly positions, and the strait experiences regions of cool thermal signature originating at its southern side. During winter, the surface flow into the Mediterranean through the Strait of Gibraltar is anomalously warm and appears to come from the interior of the Gulf of Cadiz. Quantitative measurements show that temporal variability over timescales of a few days at individual sites is maximum in midsummer. Spatial thermal variability over the whole region is found to peak toward the end of the summer. Statistical analyses of the data reveal the coupling between the surface wind field in the Gulf of Cadiz and the surface thermal pattern (especially during the summer). Wind-induced, across-stream upwelling in the Strait of Gibraltar, although dynamically subordinate to tidal and density-driven processes, is shown to occasionally dominate the surface thermal signature.",
    keywords = "ALBORAN SEA, FEATURES, MEDITERRANEAN-SEA, DYNAMICS, CIRCULATION",
    author = "Folkard, {Andrew M.} and Davies, {Peter A.} and Fiuza, {Armand F.G.} and Isabel Ambar",
    year = "1997",
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    doi = "10.1029/96JC02505",
    language = "English",
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    Remotely sensed sea surface thermal patterns in the Gulf of Cadiz and the Strait of Gibraltar : Variability, correlations, and relationships with the surface wind field. / Folkard, Andrew M.; Davies, Peter A.; Fiuza, Armand F.G.; Ambar, Isabel.

    In: Journal of Geophysical Research: Atmospheres, Vol. 102, No. C3, 15.03.1997, p. 5669-5683.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Remotely sensed sea surface thermal patterns in the Gulf of Cadiz and the Strait of Gibraltar

    T2 - Variability, correlations, and relationships with the surface wind field

    AU - Folkard, Andrew M.

    AU - Davies, Peter A.

    AU - Fiuza, Armand F.G.

    AU - Ambar, Isabel

    PY - 1997/3/15

    Y1 - 1997/3/15

    N2 - Satellite image sequences (covering periods of a few days throughout the annual cycle) of the waters off southern Iberia have been analyzed in conjunction with concurrent surface wind speed data from coastal stations. Qualitative analysis reveals a large degree of temporal and spatial variability in the thermal signature of the sea surface over periods of both a few days and several months. During the summer, a cool seasurface temperature signature extends from the western Iberian coast around Cape St. Vincent and eastward as far as Fare. At the same time, a warm signature originating on the Iberian coast between Faro and Cadiz extends into the Strait of Gibraltar. These two features are shown to sometimes adopt more westerly positions, and the strait experiences regions of cool thermal signature originating at its southern side. During winter, the surface flow into the Mediterranean through the Strait of Gibraltar is anomalously warm and appears to come from the interior of the Gulf of Cadiz. Quantitative measurements show that temporal variability over timescales of a few days at individual sites is maximum in midsummer. Spatial thermal variability over the whole region is found to peak toward the end of the summer. Statistical analyses of the data reveal the coupling between the surface wind field in the Gulf of Cadiz and the surface thermal pattern (especially during the summer). Wind-induced, across-stream upwelling in the Strait of Gibraltar, although dynamically subordinate to tidal and density-driven processes, is shown to occasionally dominate the surface thermal signature.

    AB - Satellite image sequences (covering periods of a few days throughout the annual cycle) of the waters off southern Iberia have been analyzed in conjunction with concurrent surface wind speed data from coastal stations. Qualitative analysis reveals a large degree of temporal and spatial variability in the thermal signature of the sea surface over periods of both a few days and several months. During the summer, a cool seasurface temperature signature extends from the western Iberian coast around Cape St. Vincent and eastward as far as Fare. At the same time, a warm signature originating on the Iberian coast between Faro and Cadiz extends into the Strait of Gibraltar. These two features are shown to sometimes adopt more westerly positions, and the strait experiences regions of cool thermal signature originating at its southern side. During winter, the surface flow into the Mediterranean through the Strait of Gibraltar is anomalously warm and appears to come from the interior of the Gulf of Cadiz. Quantitative measurements show that temporal variability over timescales of a few days at individual sites is maximum in midsummer. Spatial thermal variability over the whole region is found to peak toward the end of the summer. Statistical analyses of the data reveal the coupling between the surface wind field in the Gulf of Cadiz and the surface thermal pattern (especially during the summer). Wind-induced, across-stream upwelling in the Strait of Gibraltar, although dynamically subordinate to tidal and density-driven processes, is shown to occasionally dominate the surface thermal signature.

    KW - ALBORAN SEA

    KW - FEATURES

    KW - MEDITERRANEAN-SEA

    KW - DYNAMICS

    KW - CIRCULATION

    U2 - 10.1029/96JC02505

    DO - 10.1029/96JC02505

    M3 - Article

    VL - 102

    SP - 5669

    EP - 5683

    JO - Journal of Geophysical Research: Atmospheres

    JF - Journal of Geophysical Research: Atmospheres

    SN - 0148-0227

    IS - C3

    ER -