Production and sequestration of dissolved organic carbon in the Weddel Sea: Tracing deep-water formation with molecular methods

Description: Das Projekt "Production and sequestration of dissolved organic carbon in the Weddel Sea: Tracing deep-water formation with molecular methods" wird vom Umweltbundesamt gefördert und von Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung e.V. in der Helmholtz-Gemeinschaft (AWI) durchgeführt. Dissolved organic matter (DOM) in the oceans contains about the same amount of carbon as the global biomass or atmospheric CO2. Although it is clear that DOM exhibits an average age of several thousand years, sources and preservation mechanisms of DOM remain a missing link in models of global elemental cycles. The polar oceans are a primary source of DOM to the deep ocean because surface waters efficiently convect down to the oceans bottom. Deepwater formation is directly linked to sea-ice formation, when salt is rejected and dense brine enriched waters penetrate the deep ocean. Sea ice is one of the most productive marine environments, and DOM concentrations in the brine are among the highest measured in marine waters. The molecular characteristics of DOM in sea ice are widely unknown, and it is not clear whether sea-ice-derived DOM is persistent enough to survive downward transport. Based on preliminary data we roughly estimate that ca50 Tg of dissolved organic carbon (DOC) may be exported annually from the surface Weddell Sea into the abyssal ocean.

Types:

SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Kohlenstoffgehalt ? Kohlenstoff ? Meerwasser ? Pflanzensamen ? Salz ? Kohlendioxid ? Kolloid ? Marines Ökosystem ? Organisches Material ? Tiefsee ? Gelöster organischer Kohlenstoff ? Meereis ? Schadstoffpfad ? Beschlagnahme ? Daten ? Globalmodell ? Meeresoberfläche ? Oberflächengewässer ? Schadstoffausbreitung ? Meeresgewässer ? Messung ? Meeresforschung ? Biomasse ? Schadstoffquelle ? Gewässer ? Globale Aspekte ? Mittelwert ?

Region: Bremen

Bounding box: 8.83333° .. 8.83333° x 53.08333° .. 53.08333°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

• Deutsche Forschungsgemeinschaft (Bereitsteller*in)
• Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung e.V. in der Helmholtz-Gemeinschaft (AWI) (Betreiber*in)
• Umweltbundesamt (Bereitsteller*in)

Time ranges: 2008-09-01 - 2010-08-31

Alternatives

• Language: Englisch/English https://ufordat.uba.de/

Resources

• Webseite zum Förderprojekt

  http://www.spp-antarktisforschung.de/ (Webseite)

Status

Aktiv

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