Sallon, Amèlie; Michel, Christine; Gosselin, Michel (2011): Chlorophyll a and carbon fluxes, and characteristics of the water column during summer 2008 in the Beaufort Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.834260, Supplement to: Sallon, A et al. (2011): Summertime primary production and carbon export in the southeastern Beaufort Sea during the low ice year of 2008. Polar Biology, 34(12), 1989-2005, https://doi.org/10.1007/s00300-011-1055-5
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Abstract:
Following the extreme low ice year of 2007, primary production and the sinking export of particulate and gel-like organic material, using short-term particle interceptor traps deployed at 100 m, were measured in the southeastern Beaufort Sea during summer 2008. The combined influence of early ice retreat and coastal upwelling contributed to exceptionally high primary production (500 ± 312 mg C/m**2/day, n = 7), dominated by large cells (>5 µm, 73% ± 15%, n = 7). However, except for one station located north of Cape Bathurst, the sinking export of particulate organic carbon (POC) was relatively low (range: 38-104 mg C/m**2/day, n = 12) compared to other productive Arctic shelves. Estimates indicate that 80% ± 20% of the primary production was cycled through large copepods or the microbial food web. Exopolymeric substances were abundant in the sinking material but did not appear to accelerate POC sinking export. The use of isotopic signatures (d13C, d15N) and carbon/nitrogen ratios to identify sources of the sinking material was successful only at two stations with a strong marine or terrestrial signature, indicating the limitations of this approach in hydrographically and biologically complex Arctic coastal waters such as in the Beaufort Sea. At these two stations influenced by either coastal upwelling or erosion, the composition and magnitude of particulate sinking fluxes were markedly different from other stations visited during the study. These observations underscore the fundamental role of mesoscale circulation patterns and hydrodynamic singularities on the export of particulate organic material on Arctic shelves.
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Coverage:
Median Latitude: 71.413169 * Median Longitude: -127.856722 * South-bound Latitude: 70.550000 * West-bound Longitude: -133.926670 * North-bound Latitude: 72.663330 * East-bound Longitude: -121.823000
Date/Time Start: 2008-06-10T00:00:00 * Date/Time End: 2008-07-30T00:00:00
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Sallon, A; Michel, C; Gosselin, M (2011): (Table 2) Sinking fluxes of chlorophyll a, particulate organic carbon, and exopolymeric substances carbon in the southeastern Beaufort Sea, during summer 2008. https://doi.org/10.1594/PANGAEA.834259
- Sallon, A; Michel, C; Gosselin, M (2011): (Table 1) Characteristics of free-drifting particle interceptor trap moorings and of the water column in the southeastern Beaufort Sea, during summer 2008. https://doi.org/10.1594/PANGAEA.834258