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Tracing carbon exchanges/fluxes between Arctic and Atlantic basins

Projektbeschreibung

Innovative Überwachung des Klimawandels in der Arktis

Der Klimawandel hat schwere Auswirkungen, die sich in der Arktis auf dramatische Art und Weise zeigen. An der Oberfläche des Nordpolarmeers befinden sich hohe Konzentrationen gelöster organischer Substanzen – eine komplexe Mischung aus Molekülen, die bei der Zersetzung lebender Organismen entstehen – und Süßwasser, das in riesigen Mengen aus großen arktischen Flüssen zufließt. Diese gelangen durch die Framstraße, einen wichtigen Seeweg, in den Atlantischen Ozean. Im Rahmen des EU-finanzierten Projekts CarbEx sollen die Auswirkungen untersucht werden, die das zunehmende Süßwasser aus den Flüssen und die terrestrischen gelösten organischen Substanzen auf den Wasser- und Kohlenstoffkreislauf haben. Ziel des Projekts ist die Entwicklung neuer Technologien, mit denen die Dynamik des Süßwassers und Kohlenstoffs im Nordpolarmeer und aquatischen Systemen überwacht werden können.

Ziel

Dissolved organic matter (DOM) consists of a complex mixture of molecules generated from the degradation of living organisms. Surface waters of the Arctic Ocean (AO) have high concentrations of DOM and freshwater (FW) due to the massive supply from large rivers. Great part of it is exported to the Atlantic Ocean through the Fram Strait (FS). Climate change is expected to increase riverine FW and terrestrial DOM supply, with consequences to the hydrological and carbon cycles. However, such changes remain poorly understood and CarbEx will contribute to rectifying this. The three central goals are to (1) estimate the DOM and FW fluxes from the Arctic to the Atlantic Ocean through the FS, (2) assess their variability and (3) develop an approach to assess the amount of both terrestrial DOM and FW, from optical measurements of DOM. A major challenge is to obtain sufficient data from the region and CarbEx will apply three complementary approaches: oceanographic expeditions (OE), ocean color remote sensing (OCRS, satellite-based Earth Observation) and numerical modelling (NM). Riverine FW and DOC fluxes will be estimated using a combination of observations and NM. Hydrographic and biogeochemical data acquired during a series of OE conducted annually in the FS (Summer 2009–2018) is available. The in situ data will be complemented with OCRS and NM to develop a continuous time series, filling the temporal coverage gaps from OE, to analyse possible trends and links to climate change in the Arctic. CarbEx also has a non-academic character and will provide the necessary foundation to develop new technologies to monitor the FW and carbon dynamics in the AO and aquaculture sites, i.e. in situ multi-channel fluorometers. This aligns with the host’s strategy to develop observational technology and Arctic research, and with the EU’s goal for the IF programme about stimulating the creative and innovative potential through advanced training and international and intersectoral mobility.

Koordinator

DANMARKS TEKNISKE UNIVERSITET
Netto-EU-Beitrag
€ 219 312,00
Adresse
ANKER ENGELUNDS VEJ 101
2800 Kongens Lyngby
Dänemark

Auf der Karte ansehen

Region
Danmark Hovedstaden Københavns omegn
Aktivitätstyp
Higher or Secondary Education Establishments
Links
Gesamtkosten
€ 219 312,00