By Evgenii A. Romankevich

ISBN-10: 3642499643

ISBN-13: 9783642499647

ISBN-10: 364249966X

ISBN-13: 9783642499661

My paintings Geochemistry oj natural subject within the ocean first seemed in Russian in 1978. in view that then a lot growth has been made within the exploration of varied varieties of natural topic within the ocean: dissolved, colloidal, natural subject sus­ pended in debris and that contained in backside sediments and in interstitial waters. the correct proof is located in hundreds of thousands of articles and a number of other re­ view works, corresponding to Andersen (1977), Biogeochimie de [a matiere organique a ['interjace eau-sedimentmarine (1980), Duursma and Dawson (1981). a large amount of latest details has been acquired within the Soviet Union's medical associations at the composition and distribution in common waters and backside sediments of natural subject and its separate parts taking part in an important position within the formation of the chemical and organic constitution of the sea and its productiveness, within the biogeochemistry of the weather and geochemistry of natural topic within the Earth's sedimentary disguise. The parts of exploration have multiplied over the last four-and-a-half years to include many new, little-known areas, together with the Arctic seas. unlike the 3 preceeding many years, the examine has been excited about investigating the present varieties, the distribution and accumulation of natural topic in close to­ continental oceanic zones among land and sea, and in river estuaries.

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Extra resources for Geochemistry of Organic Matter in the Ocean

Example text

However, in reality things are far more complicated. The atmospheric precipitation on land due to moisture coming from the ocean amounts to 66,000 km 3. Thus, part of the precipitation of the oceanic origin (66,000 km 3 - 47,000 km 3 = 19,000 km 3) falls on the land, is once aga1n evaporated and carried into the ocean. The content of DOC in the aqueous vapour over dry land is higher than over the oceans. 5 mg C org 1-1 (Semenov et al. 1967) and, apparently makes up fully for the loss of OM by the oceans.

1963, Pytokowicz 1968). The other view presupposes that the supply of DOC, as well as of POC, to deep waters is negligible and their distribution is homogeneous (or nearly homogeneous) both in space and time (Menzel and Ryther 1970, Menzel 1974, MacKinnon 1981). The present chapter contains material on the determination of the C org content in approximately 1500 samples of sea water, performed by the methods of dry and/or wet burning developed in the Soviet Union (Skopintsev and Timofeyeva 1961, Liutsarev and Smetankin 1980).

There are no grounds for an assumption, at least with respect to conventional water reservoirs, that the external supply of compounds, the oxidation of which may serve as the energy source for chemosynthetic bacteria, does play quantitatively a perceptible role in the general cycle of OM in a water reservoir". For the present ocean as a whole this statement is true, especially since the hydrotherms and gases escaping from the ocean floor are either completely or partly oxidized by oxygen, converting into compounds which are more stable under these conditions: H 2S-S converting into S02 and even into S03 and SO~-; CO converting into CO 2.

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Geochemistry of Organic Matter in the Ocean by Evgenii A. Romankevich


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