Research on the cruise was aimed at acquiring a better understanding of plankton dynamics, carbon and nutrient fluxes, and potential trace element limitation in the Costa Rica Dome region of the eastern tropical Pacific. The specific science objectives were:
1) to assess grazing and trace metal/nutrient controls on primary production and phytoplankton standing stocks;
2) to quantify carbon and elemental fluxes and export rates from the euphotic zone; and
3) to measure microbial population, processes, stable isotope abundances associated with the OMZ and nitrite maxima.
Operations included: 4-day sediment trap deployments, daily process experiments conducted on satellite-tracked drifters, CTD and trace-metal rosette sampling, shipboard grow-out experiments, net sampling for zooplankton biomass and grazing assessments, and MOCNESS stratified tows to 1000 m.
BCO-DMO Note:
March 2013 (CLC): The original CTD profile data (85 casts) have been submitted by R2R to NODC. Jim Moffett (USC) was a participant on this cruise and is interested in getting a copy of the full set of CTD cast data (deep and shallow casts). He plans to contact SIO ODF group or Mike Landry (Chief Scientist).
Original cruise data are available from the NSF R2R data catalog.
Dataset | Brief Description |
---|---|
MV1008 Nav | Control point navigation from Rolling Deck to Repository (R2R) for cruise MV1008. |
MV1008 event log | Scientific sampling event log from cruise MV1008. |
Sediment Traps | Shallow-drifting sediment trap fluxes (C, N, pigments). |
CTD_hydro_1dbar | All cruise CTD profiles from MV1008; data at 1 decibar intervals. |
Th-234 activity | Water column Th-234 activity determined using a 4-L technique. |
Nitrate Uptake | 15NO3 uptake, 24-hour in situ incubations. |
CTD_bottle | CTD hydrography data from bottle casts for euphotic zone experiments |
nutrients_major | Concentration of major dissolved nutrients sampled from CTD hydrocasts. |
bacteria_FCM_lab | Heterotrophic (non-pigmented) bacteria abundances determined by flow cytometry (post-cruise/on-shore analysis). |
picophyto_FCM_lab | Picophytoplankton abundances determined by flow cytometry (post-cruise/on-shore analysis). |
picophyto_FCM_ship | Picophytoplankton abundances of live samples determined by flow cytometry (shipboard analysis). |
phytopl_epi_abund | Cell abundance estimates of eukaryotic phytoplankton by taxa and size-class, based on epifluorescence microscopy. |
POC PON isotopes | Concentrations and stable isotope abundances of particulate organic carbon (POC) and particulate organic nitrogen (PON). |
mesozoo biomass by size class | Mesozooplankton community biomass (wet and dry weight) for 5 size classes and total. |
mesozoo grazing by size class | Mesozooplankton community grazing, expressed as micrograms pigment m-2 h-1, for 5 size classes and total. |
phytopl_epi_biomass | Carbon biomass estimates of eukaryotic phytoplankton by taxa and size-class, based on epifluorescence microscopy. |
microzoo_epi_abund | Cell abundance estimates of heterotrophic protists by size-class, based on epifluorescence microscopy. |
microzoo_epi_biomass | Carbon biomass estimates of heterotrophic protists by size-class, based on epifluorescence microscopy. |
chla_fluor | Fluorometrically measured, extracted concentrations of chlorophyll a sampled from CTD hydrocasts. |
Elemental content of zooplankton | Concentrations of C, N, P and trace metals in zooplankton size fractions from MV1008 cruise. |
Biogenic Silica - Profiles | Water-column particulate biogenic silica and net rate of biogenic silica production measured on the MV1008 cruise. |
Biogenic Silica - Sediment Traps | Particulate biogenic silica fluxes from sediment trap arrays deployed on the MV1008 cruise. |