Journal
BIOGEOSCIENCES
Volume 11, Issue 10, Pages 2755-2770Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/bg-11-2755-2014
Keywords
-
Categories
Funding
- Spanish Ministry of Science under the scope of the International Polar Year (IPY)
- Spanish Research Council (CSIC) [JAEDOC030]
- Fondo Social Europeo (FSO)
- Natural Environment Research Council [ceh010010] Funding Source: researchfish
Ask authors/readers for more resources
Exchangeable organic carbon (OC) dynamics and CO2 fluxes in the Antarctic Peninsula during austral summer were highly variable, but the region appeared to be a net sink for OC and nearly in balance for CO2. Surface exchangeable dissolved organic carbon (EDOC) measurements had a 43 +/- 3 (standard error, hereafter SE) mol CL-1 overall mean and represented around 66% of surface non-purgeable dissolved organic carbon (DOC) in Antarctic waters, while the mean concentration of the gaseous fraction of organic carbon (GOCH'(-1)) was 46 +/- 3 SE mu mol C L-1. There was a tendency towards low fugacity of dissolved CO2 (fCO(2-w)) in waters with high chlorophyll a (Chl a) content and high fCO(2-w) in areas with high krill densities. However, such relationships were not found for EDOC. The depth profiles of EDOC were also quite variable and occasionally followed Chl a profiles. The diel cycles of EDOC showed two distinct peaks, in the middle of the day and the middle of the short austral dark period, concurrent with solar radiation maxima and krill night migration patterns. However, no evident diel pattern for GOC H'(-1) or CO2 was observed. The pool of exchangeable OC is an important and active compartment of the carbon budget surrounding the Antarctic Peninsula and adds to previous studies highlighting its importance in the redistribution of carbon in marine environments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available