Ocean Biogeochemistry: The Role of the Ocean Carbon Cycle in by Michael J. R. Fasham, Hugh W. Ducklow (auth.), Michael J. R.

By Michael J. R. Fasham, Hugh W. Ducklow (auth.), Michael J. R. Fasham (eds.)

Oceans account for fifty% of the anthropogenic CO2 published into the ambience. in the past 15 years a global programme, the Joint international Ocean Flux research (JGOFS), has been learning the sea carbon cycle to quantify and version the organic and actual techniques wherein CO2 is pumped from the ocean's floor to the depths of the sea, the place it could possibly stay for centuries. This venture is without doubt one of the greatest multi-disciplinary experiences of the oceans ever conducted and this e-book synthesises the consequences. It covers all facets of the subject starting from air-sea trade with CO2, the position of actual blending, the uptake of CO2 by marine algae, the fluxes of carbon and nitrogen in the course of the marine meals chain to the next export of carbon to the depths of the sea. targeted emphasis is laid on predicting destiny climatic change.

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Aquat Microb Ecol 15:265–276 Li WKW, Subba Rao DV, Harrison WG, Smith JC, Cullen JJ, Irwin B, Platt T (1982) Autotrophic picoplankton in the tropical ocean. Science 219:292–95 Longhurst AR (1995) Seasonal cycles of pelagic production and consumption. Prog Oceanogr 36:77–167 Longhurst AR (1998) Ecological geography of the sea. Academic, San Diego, 398 pp Longhurst AR, Sathyendranath S, Platt T, Caverhill C (1995) An estimate of global primary production in the ocean from satellite radiometer data.

The distributions of longer-lived oceanic tracers, such as radiocarbon, and the accumulation of nutrients are consistent with the latter view. HowFig. 2. 5 °C respectively. g. Schmitz 1995) and inverse models (Macdonald and Wunsch 1996; Fig. 2) suggest a more complex global circulation, emphasizing separate overturning cells in the Atlantic and Pacific Basins each connecting independently with the Southern Ocean. This more complex circulation is also found to be consistent with the nutrient distributions in inverse models (Ganachaud and Wunsch 2002).

AAIW is subducted and spreads northwards probably via the gyre circulation between continental barriers. ii In the lower cell, AABW spreads northwards along the bottom through a geostrophic flow supported by pressure contrasts across topographic ridges. iii The return flow of the upper and lower cells is associated with the southwards spreading of NADW. This NADW spreading is fed from the northern hemisphere, rather than by a local ‘Deacon’ cell with diabatic transfer across the thermocline (as misleadingly implied by averaging velocities at fixed points and depths).

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