River versus atmospheric input of material to the mediterranean sea

an overview

Jean Marie Martin, Francoise Elbaz-Poulichet, Cecile Guieu, Marie Dominique Loÿe-Pilot, Gengchen Han

    Research output: Contribution to journalArticle

    Abstract

    River input has long been considered as the major source of chemical elements to the ocean system. However, in recent years, it has become increasingly apparent that atmospheric transport plays a central role in the supply of material to the ocean. This atmospheric input is especially important in shelf seas and semi-enclosed seas such as the Mediterranean, which is close to potential pollution sources in Northern Europe and subjected to the well-known influx of Sahara red dust. This paper summarizes the work performed by the Land-Sea Interactions Group of CNRS (1984-1987) and the EROS-2000 programme (1987-1988) on a variety of elements and compounds in this area, where a combined study of river and atmospheric fluxes has been carried out. It is shown that the atmospheric input of red dust is of the same order of magnitude as the annual downstream flow of rivers discharging to the Western Mediterranean. As far as trace metals are concerned, the atmospheric flux of Cu, Pb and Cd exceeds river input by one to two orders of magnitude. However, the incoming flux through the straits of Sicily and (mainly) Gibraltar might be as important as the atmospheric flux; the residence times of these three metals are either shorter than the water renewal time (Pb, Cu) or equivalent to it, so that their accumulation in the water column is unlikely. As far as artificial radionuclides are concerned, atmospheric input is predominant for 239Pu + 240Pu and 137Cs, whereas 238 Pu is mainly of riverine origin. The fluxes of nitrogen supplied by rivers and rain are approximately equivalent. The biological significance of this nitrogen input is discussed; it is estimated that the atmospheric nitrogen corresponds to 10% of the average 'new' production and may reach values as high as 50% during oligotrophic periods.

    Original languageEnglish (US)
    Pages (from-to)159-182
    Number of pages24
    JournalMarine Chemistry
    Volume28
    Issue number1-3
    DOIs
    StatePublished - Jan 1 1989

    Fingerprint

    Rivers
    Fluxes
    river
    Nitrogen
    Dust
    nitrogen
    land-sea interaction
    semienclosed sea
    dust
    Water
    shelf sea
    chemical element
    atmospheric transport
    ocean
    pollutant source
    Radioisotopes
    Chemical elements
    trace metal
    Rain
    strait

    ASJC Scopus subject areas

    • Oceanography
    • Chemistry(all)
    • Environmental Chemistry
    • Water Science and Technology

    Cite this

    Martin, J. M., Elbaz-Poulichet, F., Guieu, C., Loÿe-Pilot, M. D., & Han, G. (1989). River versus atmospheric input of material to the mediterranean sea: an overview. Marine Chemistry, 28(1-3), 159-182. https://doi.org/10.1016/0304-4203(89)90193-X

    River versus atmospheric input of material to the mediterranean sea : an overview. / Martin, Jean Marie; Elbaz-Poulichet, Francoise; Guieu, Cecile; Loÿe-Pilot, Marie Dominique; Han, Gengchen.

    In: Marine Chemistry, Vol. 28, No. 1-3, 01.01.1989, p. 159-182.

    Research output: Contribution to journalArticle

    Martin, JM, Elbaz-Poulichet, F, Guieu, C, Loÿe-Pilot, MD & Han, G 1989, 'River versus atmospheric input of material to the mediterranean sea: an overview', Marine Chemistry, vol. 28, no. 1-3, pp. 159-182. https://doi.org/10.1016/0304-4203(89)90193-X
    Martin JM, Elbaz-Poulichet F, Guieu C, Loÿe-Pilot MD, Han G. River versus atmospheric input of material to the mediterranean sea: an overview. Marine Chemistry. 1989 Jan 1;28(1-3):159-182. https://doi.org/10.1016/0304-4203(89)90193-X
    Martin, Jean Marie ; Elbaz-Poulichet, Francoise ; Guieu, Cecile ; Loÿe-Pilot, Marie Dominique ; Han, Gengchen. / River versus atmospheric input of material to the mediterranean sea : an overview. In: Marine Chemistry. 1989 ; Vol. 28, No. 1-3. pp. 159-182.
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