Carbon and Nitrogen uptake rates in the East Antarctic sea-ice zone, (SIPEX II preliminary results)

Arnout Roukaerts, Anne Julie Cavagna, Frank Dehairs

Onderzoeksoutput: Meeting abstract (Book)

Samenvatting

As a continuation of SIPEX I (2007), the SIPEX II expedition (Sept.-Nov. 2012) took place in the East Antarctic sector (63–66°S, 115-125°E; R/V Aurora Australis) in pre-bloom conditions. Our work focused on improving the understanding of nutrient cycling and primary production in the seasonal drift ice. Various nutrient uptake rates (HCO3-, NO3-, NH4+ and H4SiO4) were measured using stable isotope dilution methods (13C, 15N, 30Si). Sampling and experiments were conducted in close relation with the trace metal group in order to link nutrient cycling with the availability of trace metals such as iron.
Aside from enrichment experiments, also samples for natural nitrate isotopy (δ15N-NO3- and δ18O-NO3-) were taken to obtain indications on trophic processes regarding the nitrogen cycle. We present here preliminary results for the ice core nutrient incubation experiments.
Originele taal-2English
Titel45th International Liège Colloquium, Primary Production in the Ocean: From the Synoptic to the Global Scale, May 13-17, 2013, Liège, Belgium
StatusPublished - 2013
Evenement45th International Liège Colloquium, Primary Production in the Ocean: From the Synoptic to the Global Scale - Liege, Belgium
Duur: 13 mei 201317 mei 2013

Conference

Conference45th International Liège Colloquium, Primary Production in the Ocean: From the Synoptic to the Global Scale
Land/RegioBelgium
StadLiege
Periode13/05/1317/05/13

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