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Deuser, Werner G; Jickells, Timothy D; King, P; Commeau, J A (1995): Biogenic opal, carbonate fluxes, time series. PANGAEA,, Supplement to: Deuser, WG et al. (1995): Decadal and annual changes in biogenic opal and carbonate fluxes to the deep Sargasso Sea. Deep Sea Research Part I: Oceanographic Research Papers, 42(11-12), 1923-1932,

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Analyses of samples from a 14-year series of sediment-trap deployments in the deep Sargasso Sea reveal a significant trend in the ratio of the sinking fluxes of biogenic calcium carbonate and silica. Although there are pronounced seasonal cycles for both flux components, the overall opal/CaCO3 ratio changed by 50% from 1978 to 1991 (largely due to a decrease of opal flux), while total flux had no significant trend. These results suggest that plankton communities respond rapidly to subtle climate change, such as is evident in regional variations of wind speed, precipitation, wintertime ventilation and midwater temperatures. If the trends we observe in the makeup of sinking particulate matter occur on a large scale, they may in turn modify climate by modulating ocean-atmosphere CO2 exchange and albedo over the ocean.
Fourth Framework Programme (FP4), grant/award no. MAS3970141: Silicon Cycling in the World Ocean
Latitude: 31.666663 * Longitude: -64.166663
Date/Time Start: 1978-04-06T00:00:00 * Date/Time End: 1991-09-21T00:00:00
Minimum DEPTH, water: 3200 m * Maximum DEPTH, water: 3200 m
BATS * Latitude Start: 31.666667 * Longitude Start: -64.166667 * Latitude End: 31.666660 * Longitude End: -64.166660 * Date/Time Start: 1978-04-06T12:00:00 * Date/Time End: 1991-09-07T12:00:00 * Elevation Start: -4200.0 m * Elevation End: -4200.0 m * Location: Sargasso Sea * Campaign: compiled data * Method/Device: Mooring (MOOR) * Comment: this is the nominal BATS site to link compiled data sets (e.g. 1954-1998 BATS Flux Sample Extraction)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
2DEPTH, waterDepth watermGeocode
3Duration, number of daysDurationdaysDeuser, Werner G
4Total mass, flux per dayTot mass fluxmg/m2/dayDeuser, Werner Gsee reference(s)
5Opal, fluxbSiO2 fluxmg/m2/dayDeuser, Werner Gsee reference(s)
6Calcium carbonate, fluxCaCO3 fluxmg/m2/dayDeuser, Werner Gsee reference(s)
328 data points

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