Expected Datasets from Alpha Helix 2002 Bering Strait Cruise
3 moorings recovered and redeployed
98 CTD casts were taken. Bottles were
fired at standard depths (bottom, bottom-2m, 50m, 40m, 30m, 20m, 10m, 5m,
surface) and samples were taken for nutrients, DMS, chlorophyll, O18 isotopes,
nitrogen isotopes and salinity.
With the exception of the PHL and
CCL lines, ADCP sections were run as dedicated sections at a speed of 7 knots.
Nutrient
Analysis work (Whitledge, Thornton, Lee):
A
total of 536 nutrient samples were taken and analyzed on board for silicate,
phosphate, nitrate, nitrite and ammonia by Whitledge, Thornton and Lee. In
addition, at many stations samples were taken at surface, mid water column and
bottom for chlorophyll, and at some stations samples were taken for
size-fractionated chlorophyll, fractionated on 20um, 5um and GF/F filters. At the four sites M2, A2, A3 and CCL15,
primary productivity stations (stable isotope nutrient enrichment primary
productivity experiments with 15N-labeled nitrate and ammonia and 13C-labeled
carbon) were also run.
DMS
Analysis work (Deal):
DMS
sea water profiles were taken at 18 stations.
Oxygen
isotope sampling (Woodgate for Cooper, Tennessee):
A
total of 379 water samples were taken for O18 sampling. Samples were taken at all stations except
some of the productivity stations (see bottle list in an appendix).
Nitrogen
Isotope sampling (by Deal for Tanaka, IARC/UAF)
Nine
water samples (3 each at sites A2, A3 and A4) were taken for nitrogen isotope
analysis.
Underway
sampling:
Seachest data.