http://lod.bco-dmo.org/id/dataset/3951
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2013-05-21
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Biogeochemical and biological data from Niskin bottle samples from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, Bermuda Atlantic Time-Series Station from 2011-2012 (Trophic BATS project)
2013-05-21
publication
2013-05-21
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-11-06
publication
https://doi.org/10.1575/1912/bco-dmo.3951.1
Michael W. Lomas
Bigelow Laboratory for Ocean Sciences
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Lomas, M. (2013) Biogeochemical and biological data from Niskin bottle samples from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, Bermuda Atlantic Time-Series Station from 2011-2012 (Trophic BATS project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2013-05-21 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.3951.1 [access date]
Biogeochemical and biological data from the Sargasso Sea. Dataset Description: <p>Biogeochemical and biological data collected on the Trophic BATS cruises in the Sargasso Sea. Data are from 4 cruises over the span 2011-2012. The provided data are complete matrices and therefore not every sample (columns) will be taken from every Niskin fired (rows).</p> Methods and Sampling: <p>Methods are summarized below. Detailed methods for all data collected as part of this study can be found in the publications arising from this study (references given below).</p>
<p>On each BATS cruise, aquasi-lagrangian sampling scheme is employed. An in situ primary productivity array is deployed from dawn to dusk. The biogeochemistry and biological parameters reported in this data were measured from Niskin bottle water samples.</p>
<p>Bacterial production was measured using [3H-methyl] thymidine incorporation and converted to carbon-based bacterial production using standard equations. Bacterial abundance was determined using DAPI stained epifluorescence microscopy. Pico-autotrophs were identified as either Synechococcus and Prochlorococcus.</p>
<p>Samples for NO3/NO2, NO2 and PO4 are filtered and frozen (-20 degrees C) in HDPE bottles until analysis. Total organic carbon (TOC) and total nitrogen were determined using high temperature combustion techniques. Total phosphorus concentrations are quantified using a high temperature/persulfateoxidation technique. Particulate organic carbon (POC) and nitrogen (PON) samples were filtered on precombusted Whatman GF/F filters and frozen until analysis on an elemental analyzer. Particulate phosphorus samples were analyzed using an ash-hydrolysis method with oxidation efficiency and standard recovery checks.</p>
<p>Sample QA/QC procedures followed those given in the associated manuscripts. At the point of collection, any leaking niskin bottles were noted on the master cast sheets and samples were taken from a different niskin fired at the same depth as the leaking bottle. No data are reported for leaking Niskin bottles. During sample analysis, certified standards, where available, were carefully examined to ensure that they were consistent with expectations for accuracy and precision. If no obvious error or problem was found, the data were considered OK and in the range of environmental data that this study hoped to observe.<br />
<br />
Sample accuracy was assessed by using certified standards, for those measurements where standards are available. Certified standards were run with each analytical run and compared to long term control charts for respective analyses. For those analyses where there are no standards (e.g., flow cytometric cell counts) data were assessed for reasonableness based upon extensive experience of the PI’s.</p>
<p>Detailed information on analyses:<br />
Lomas, M.W., Burke, A., Lomas, D.A., Bell, D.W., Shen, C., Ammerman, J.W., Dyhrman, S.T. 2010.&nbsp; Sargasso Sea phosphorus biogeochemistry: An important role for dissolved organic phosphorus (DOP). Biogeosciences 7: 695-710. doi: <a href="http://dx.doi.org/10.5194/bg-7-695-2010" target="_blank">10.5194/bg-7-695-2010</a><br />
Lomas, M.W., Bates, N.R., Johnson, R.J., Knap, A.H., Steinberg, D.K., Carlson, C.A. 2013. Two decades and counting: overview of 24-years of sustained open ocean biogeochemical measurements. Deep Sea Research II doi: <a href="http://dx.doi.org/10.1016/j.dsr2.2013.01.008" target="_blank">10.1016/j.dsr2.2013.01.008</a>.</p>
<p>References:<br />
Casey, J.R., Aucan, J.P., Goldberg, S.R., and Lomas, M.W. 2013. Changes in partitioning of carbon amongst photosynthetic pico- and nano-plankton groups in the Sargasso Sea in response to changes in the North Atlantic Oscillation. Deep Sea Research II doi: <a href="http://dx.doi.org/10.1016/j.dsr2.2013.02.002" target="_blank">10.1016/j.dsr2.2013.02.002</a></p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1030149 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1030149
completed
Michael W. Lomas
Bigelow Laboratory for Ocean Sciences
207-315-2567 ext 311
60 Bigelow Drive PO Box 380
East Boothbay
ME
04544
United States
mlomas@bigelow.org
pointOfContact
asNeeded
Dataset Version: 1
Unknown
cruise_id
date
cast
station
lat
lon
julian_day
time_local
depth
depth_nom
niskin_flag
temp
sal
density
chl_a
O2
beam
chla_tot_whole
chla_tot_gt5um
bact_prod
bact_prod_C
bact_abund
bact_POC
prochlorococcus
synechococcus
peuks
neuks
prochlor_POC_per_cell
synecho_POC_per_cell
peuks_POC_per_cell
neuks_POC_per_cell
prochlor_POC
synecho_POC
peuks_POC
neuks_POC
NO3_NO2
NO2
PO4
SiOH4
PO4_MAGIC
POC
PON
POP
TOC
TON
TDP
CHN Elemental Analyzer
Niskin bottle
Nutrient Autoanalyzer
theme
None, User defined
Cruise identfier
date
cast
station
latitude
longitude
Julian day as a decimal (time elapsed in days from 00:00 on January 1st 4713 BC)
time_local
depth
No BCO-DMO term
quality flag
water temperature at measurement depth
salinity
density
chlorophyll a
dissolved Oxygen
beam_c
bact_prod_thy
bacterial abundance
prochlorococcus abundance
synechococcus abundance
pico_euks
nano eukaryotic phytoplankton
nitrate plus nitrite
Nitrite
reactive phosphorus (PO4)
Silicate, Si(OH)4, silicic acid
particulate organic Carbon (POC)
particulate organic nitrogen
total organic Carbon
total organic Nitrogen
Total Dissolved Phosphorus
featureType
BCO-DMO Standard Parameters
CHN Elemental Analyzer
Niskin bottle
Nutrient Autoanalyzer
instrument
BCO-DMO Standard Instruments
AE1102
AE1118
AE1206
AE1219
service
Deployment Activity
Sargasso Sea, BATS site
Sargasso Sea; Bermuda Atlantic Time-Series Station; 31 N 64 S
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Ocean Carbon and Biogeochemistry
http://us-ocb.org/
Ocean Carbon and Biogeochemistry
The Ocean Carbon and Biogeochemistry (OCB) program focuses on the ocean's role as a component of the global Earth system, bringing together research in geochemistry, ocean physics, and ecology that inform on and advance our understanding of ocean biogeochemistry. The overall program goals are to promote, plan, and coordinate collaborative, multidisciplinary research opportunities within the U.S. research community and with international partners. Important OCB-related activities currently include: the Ocean Carbon and Climate Change (OCCC) and the North American Carbon Program (NACP); U.S. contributions to IMBER, SOLAS, CARBOOCEAN; and numerous U.S. single-investigator and medium-size research projects funded by U.S. federal agencies including NASA, NOAA, and NSF.
The scientific mission of OCB is to study the evolving role of the ocean in the global carbon cycle, in the face of environmental variability and change through studies of marine biogeochemical cycles and associated ecosystems.
The overarching OCB science themes include improved understanding and prediction of: 1) oceanic uptake and release of atmospheric CO2 and other greenhouse gases and 2) environmental sensitivities of biogeochemical cycles, marine ecosystems, and interactions between the two.
The OCB Research Priorities (updated January 2012) include: ocean acidification; terrestrial/coastal carbon fluxes and exchanges; climate sensitivities of and change in ecosystem structure and associated impacts on biogeochemical cycles; mesopelagic ecological and biogeochemical interactions; benthic-pelagic feedbacks on biogeochemical cycles; ocean carbon uptake and storage; and expanding low-oxygen conditions in the coastal and open oceans.
OCB
largerWorkCitation
program
Plankton Community Composition and Trophic Interactions as Modifiers of Carbon Export in the Sargasso Sea
https://osprey.bco-dmo.org/project/2150
Plankton Community Composition and Trophic Interactions as Modifiers of Carbon Export in the Sargasso Sea
<p>Fluxes of particulate carbon from the surface ocean are greatly influenced by the size, taxonomic composition and trophic interactions of the resident planktonic community. Large and/or heavily-ballasted phytoplankton such as diatoms and coccolithophores are key contributors to carbon export due to their high sinking rates and direct routes of export through large zooplankton. The potential contributions of small, unballasted phytoplankton, through aggregation and/or trophic re-packaging, have been recognized more recently. This recognition comes as direct observations in the field show unexpected trends. In the Sargasso Sea, for example, shallow carbon export has increased in the last decade but the corresponding shift in phytoplankton community composition during this time has not been towards larger cells like diatoms. Instead, the abundance of the picoplanktonic cyanobacterium, Synechococccus, has increased significantly. The trophic pathways that link the increased abundance of Synechococcus to carbon export have not been characterized. These observations helped to frame the overarching research question, "How do plankton size, community composition and trophic interactions modify carbon export from the euphotic zone". Since small phytoplankton are responsible for the majority of primary production in oligotrophic subtropical gyres, the trophic interactions that include them must be characterized in order to achieve a mechanistic understanding of the function of the biological pump in the oligotrophic regions of the ocean.</p>
<p>This requires a complete characterization of the major organisms and their rates of production and consumption. Accordingly, the research objectives are: 1) to characterize (qualitatively and quantitatively) trophic interactions between major plankton groups in the euphotic zone and rates of, and contributors to, carbon export and 2) to develop a constrained food web model, based on these data, that will allow us to better understand current and predict near-future patterns in export production in the Sargasso Sea.</p>
<p>The investigators will use a combination of field-based process studies and food web modeling to quantify rates of carbon exchange between key components of the ecosystem at the Bermuda Atlantic Time-series Study (BATS) site. Measurements will include a novel DNA-based approach to characterizing and quantifying planktonic contributors to carbon export. The well-documented seasonal variability at BATS and the occurrence of mesoscale eddies will be used as a natural laboratory in which to study ecosystems of different structure. This study is unique in that it aims to characterize multiple food web interactions and carbon export simultaneously and over similar time and space scales. A key strength of the proposed research is also the tight connection and feedback between the data collection and modeling components.</p>
<p>Characterizing the complex interactions between the biological community and export production is critical for predicting changes in phytoplankton species dominance, trophic relationships and export production that might occur under scenarios of climate-related changes in ocean circulation and mixing. The results from this research may also contribute to understanding of the biological mechanisms that drive current regional to basin scale variability in carbon export in oligotrophic gyres.</p>
Trophic BATS
largerWorkCitation
project
eng; USA
oceans
Sargasso Sea, BATS site; Sargasso Sea; Bermuda Atlantic Time-Series Station; 31 N 64 S
-65.8
-63.3235
29.5012
33.5032
2011-02-24
2012-07-31
Sargasso Sea, BATS site
0
BCO-DMO catalogue of parameters from Biogeochemical and biological data from Niskin bottle samples from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, Bermuda Atlantic Time-Series Station from 2011-2012 (Trophic BATS project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/34777.rdf
Name: cruise_id
Units: text
Description: <p>Official cruise identifier e.g. AE1102 = R/V Atlantic Explorer cruise number 1102.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34778.rdf
Name: date
Units: unitless
Description: <p>Date of operation in mm/dd/yyyy format.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34779.rdf
Name: cast
Units: integer
Description: <p>CTD drop number.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34780.rdf
Name: station
Units: integer or text
Description: <p>Station number/name.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34781.rdf
Name: lat
Units: decimal degree
Description: <p>Latitude; positive is North.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34782.rdf
Name: lon
Units: decimal degree
Description: <p>Longitude; positive is East.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34783.rdf
Name: julian_day
Units: decimal day
Description: <p>Julian day.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34784.rdf
Name: time_local
Units: HHMM
Description: <p>Time (local).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34785.rdf
Name: depth
Units: meters
Description: <p>Actual depth of niskin fire.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34786.rdf
Name: depth_nom
Units: meters
Description: <p>Target depth of niskin fire.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34787.rdf
Name: niskin_flag
Units: dimensionless
Description: <p>Quality flag for the niskin bottle fire.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34788.rdf
Name: temp
Units: degrees Celsius
Description: <p>Temperature measured by CTD.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34789.rdf
Name: sal
Units: parts per thousand (ppt)
Description: <p>Salinity measured by CTD.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34790.rdf
Name: density
Units: kg per cubic meter
Description: <p>Density measured by CTD (kg m-3).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34791.rdf
Name: chl_a
Units: micrograms per liter
Description: <p>Chlorohyll-a measured by CTD (ug/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34792.rdf
Name: O2
Units: micromoles per kilogram
Description: <p>O2 measured by CTD (umol/kg).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34793.rdf
Name: beam
Units: reciprocal meters
Description: <p>Beam attenuation (1/m).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34794.rdf
Name: chla_tot_whole
Units: micrograms per liter
Description: <p>Total chlorophyll-a (ug/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34795.rdf
Name: chla_tot_gt5um
Units: micrograms per liter
Description: <p>Chlorophyll-a (ug/L); fraction greater than 5 um.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34796.rdf
Name: bact_prod
Units: pmol Thy per liter per hour
Description: <p>Small volume bacterial production measured by thymidine incorporation (pmol Thy L-1 h-1)</p>
http://lod.bco-dmo.org/id/dataset-parameter/34797.rdf
Name: bact_prod_C
Units: milligrams C per cubic meter per day
Description: <p>Bacterial thymidine production converted to C units using conversions in Carlson et al. 1996 (mgC m-3 d-1).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34798.rdf
Name: bact_abund
Units: cells per milliliter
Description: <p>Bacterial abundance by DAPI staining and epifluorescent counting (cells/mL).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34799.rdf
Name: bact_POC
Units: micrograms per liter
Description: <p>Bacterial abundance converted to C units using factors in Carlson et al. 1996 (ug/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34800.rdf
Name: prochlorococcus
Units: cells per milliliter
Description: <p>Prochlorococcus abundance by flow cytometry (cells/mL).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34801.rdf
Name: synechococcus
Units: cells per milliliter
Description: <p>Synechococcus abundance by flow cytometry (cells/mL).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34802.rdf
Name: peuks
Units: cells per milliliter
Description: <p>Picoeukaryote abundance by flow cytometry (cells/mL).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34803.rdf
Name: neuks
Units: cells per milliliter
Description: <p>Nanoeukaryote abundance by flow cytometry (cells/mL).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34804.rdf
Name: prochlor_POC_per_cell
Units: femtograms C per cell
Description: <p>Average particulate organic carbon (POC) content of Prochlorococcus cells derived from POC vs. flow cytometry based forward angle light scatter (Casey et al. 2013); fg/cell.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34805.rdf
Name: synecho_POC_per_cell
Units: femtograms C per cell
Description: <p>Average particulate organic carbon (POC) content of Synechococcus cells derived from POC vs. flow cytometry based forward angle light scatter (Casey et al. 2013); fg/cell</p>
http://lod.bco-dmo.org/id/dataset-parameter/34806.rdf
Name: peuks_POC_per_cell
Units: femtograms C per cell
Description: <p>Average particulate organic carbon (POC) content of picoeukaryotes derived from POC vs. flow cytometry based forward angle light scatter (Casey et al. 2013); fg/cell.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34807.rdf
Name: neuks_POC_per_cell
Units: femtograms C per cell
Description: <p>Average particulate organic carbon (POC) content of nanoeukaryotes derived from POC vs. flow cytometry based forward angle light scatter (Casey et al. 2013); fg/cell.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34808.rdf
Name: prochlor_POC
Units: micromoles per liter
Description: <p>POC (umol/L) for the entire Prochlorococcus population, calculated as POC per cell times cell abundance.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34809.rdf
Name: synecho_POC
Units: micromoles per liter
Description: <p>POC (umol/L) for the entire Synechococcus population, calculated as POC per cell times cell abundance.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34810.rdf
Name: peuks_POC
Units: micromoles per liter
Description: <p>POC (umol/L) for the entire picoeukaryote population, calculated as POC per cell times cell abundance.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34811.rdf
Name: neuks_POC
Units: micromoles per liter
Description: <p>POC (umol/L) for the entire nanoeukaryote population, calculated as POC per cell times cell abundance.</p>
http://lod.bco-dmo.org/id/dataset-parameter/34812.rdf
Name: NO3_NO2
Units: micromoles per liter
Description: <p>Combined nitrate and nitrite concentrations by AutoAnalyzer (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34813.rdf
Name: NO2
Units: micromoles per liter
Description: <p>Nitrite concentration by AutoAnalyzer (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34814.rdf
Name: PO4
Units: micromoles per liter
Description: <p>Phosphate concentration by AutoAnalyzer (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34815.rdf
Name: SiOH4
Units: micromoles per liter
Description: <p>Silicate concentration by AutoAnalyzer (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34816.rdf
Name: PO4_MAGIC
Units: micromoles per liter
Description: <p>High sensitivity phosphate concentration by MAGIC method (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34817.rdf
Name: POC
Units: micromoles per liter
Description: <p>Particulate organic carbon concentration (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34818.rdf
Name: PON
Units: micromoles per liter
Description: <p>Particulate organic nitrogen concentration (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34819.rdf
Name: POP
Units: micromoles per liter
Description: <p>Particulate organic phosphorus concentration (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34820.rdf
Name: TOC
Units: micromoles per liter
Description: <p>Total organic carbon concentration (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34821.rdf
Name: TON
Units: micromoles per liter
Description: <p>Total organic nitrogen concentration (umol/L).</p>
http://lod.bco-dmo.org/id/dataset-parameter/34822.rdf
Name: TDP
Units: micromoles per liter
Description: <p>Total dissolved phosphorus concentration concentration (umol/L).</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
420837
https://darchive.mblwhoilibrary.org/bitstream/1912/24786/1/dataset-3951_biogeochem-and-biology__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.3951.1
download
onLine
dataset
<p>Methods are summarized below. Detailed methods for all data collected as part of this study can be found in the publications arising from this study (references given below).</p>
<p>On each BATS cruise, aquasi-lagrangian sampling scheme is employed. An in situ primary productivity array is deployed from dawn to dusk. The biogeochemistry and biological parameters reported in this data were measured from Niskin bottle water samples.</p>
<p>Bacterial production was measured using [3H-methyl] thymidine incorporation and converted to carbon-based bacterial production using standard equations. Bacterial abundance was determined using DAPI stained epifluorescence microscopy. Pico-autotrophs were identified as either Synechococcus and Prochlorococcus.</p>
<p>Samples for NO3/NO2, NO2 and PO4 are filtered and frozen (-20 degrees C) in HDPE bottles until analysis. Total organic carbon (TOC) and total nitrogen were determined using high temperature combustion techniques. Total phosphorus concentrations are quantified using a high temperature/persulfateoxidation technique. Particulate organic carbon (POC) and nitrogen (PON) samples were filtered on precombusted Whatman GF/F filters and frozen until analysis on an elemental analyzer. Particulate phosphorus samples were analyzed using an ash-hydrolysis method with oxidation efficiency and standard recovery checks.</p>
<p>Sample QA/QC procedures followed those given in the associated manuscripts. At the point of collection, any leaking niskin bottles were noted on the master cast sheets and samples were taken from a different niskin fired at the same depth as the leaking bottle. No data are reported for leaking Niskin bottles. During sample analysis, certified standards, where available, were carefully examined to ensure that they were consistent with expectations for accuracy and precision. If no obvious error or problem was found, the data were considered OK and in the range of environmental data that this study hoped to observe.<br />
<br />
Sample accuracy was assessed by using certified standards, for those measurements where standards are available. Certified standards were run with each analytical run and compared to long term control charts for respective analyses. For those analyses where there are no standards (e.g., flow cytometric cell counts) data were assessed for reasonableness based upon extensive experience of the PI’s.</p>
<p>Detailed information on analyses:<br />
Lomas, M.W., Burke, A., Lomas, D.A., Bell, D.W., Shen, C., Ammerman, J.W., Dyhrman, S.T. 2010.&nbsp; Sargasso Sea phosphorus biogeochemistry: An important role for dissolved organic phosphorus (DOP). Biogeosciences 7: 695-710. doi: <a href="http://dx.doi.org/10.5194/bg-7-695-2010" target="_blank">10.5194/bg-7-695-2010</a><br />
Lomas, M.W., Bates, N.R., Johnson, R.J., Knap, A.H., Steinberg, D.K., Carlson, C.A. 2013. Two decades and counting: overview of 24-years of sustained open ocean biogeochemical measurements. Deep Sea Research II doi: <a href="http://dx.doi.org/10.1016/j.dsr2.2013.01.008" target="_blank">10.1016/j.dsr2.2013.01.008</a>.</p>
<p>References:<br />
Casey, J.R., Aucan, J.P., Goldberg, S.R., and Lomas, M.W. 2013. Changes in partitioning of carbon amongst photosynthetic pico- and nano-plankton groups in the Sargasso Sea in response to changes in the North Atlantic Oscillation. Deep Sea Research II doi: <a href="http://dx.doi.org/10.1016/j.dsr2.2013.02.002" target="_blank">10.1016/j.dsr2.2013.02.002</a></p>
Specified by the Principal Investigator(s)
<p>The provided data are complete matrices and therefore not every sample (columns) will be taken from every Niskin fired (rows). Data that were either not collected, or were associated with leaking Niskins, or were found to be in error for other reasons are denoted by 'nd'. Most of the data given in this dataset are not derived variables and are calculated using reasonably standard equations as given in the appropriate references. Where data are derived (e.g., bacterial carbon biomass) the appropriate reference is given in the parameter definition.<br />
<br />
Only nutrient analyses were close to analytical method detection limits (MDL). MDLs were estimated as 3x the standard deviation of the lowest standard used for the analysis and are ~30nM for nitrate and phosphate using a standard autoanalyzer. We used the MAGIC co-precipitation method for phosphate which lowered our MDL to ~0.5nM. Samples below the MDL are reported as the MDL.</p>
<p>BCO-DMO Processing Notes:<br />
- Modified parameter names to conform with BCO-DMO naming conventions.<br />
- Replaced '-9.99' with 'nd'.</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
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CHN Elemental Analyzer
CHN Elemental Analyzer
PI Supplied Instrument Name: CHN Elemental Analyzer PI Supplied Instrument Description:A CE440 CHN elemental analyzer was used to measure POC and PON. Instrument Name: CHN Elemental Analyzer Instrument Short Name:CHN_EA Instrument Description: A CHN Elemental Analyzer is used for the determination of carbon, hydrogen, and nitrogen content in organic and other types of materials, including solids, liquids, volatile, and viscous samples.
Niskin bottle
Niskin bottle
PI Supplied Instrument Name: Niskin bottle Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument Description: A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
Nutrient Autoanalyzer
Nutrient Autoanalyzer
PI Supplied Instrument Name: Nutrient Autoanalyzer PI Supplied Instrument Description:TechniconAAII and AlpkemFSIV autoanalyzers were used to determine nitrate, nitrite, silicate, and phosphate. Instrument Name: Nutrient Autoanalyzer Instrument Short Name:Nutrient Autoanalyzer Instrument Description: Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB04/
Cruise: AE1102
AE1102
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1102
Tammi Richardson
University of South Carolina
Cruise: AE1118
AE1118
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1118
Tammi Richardson
University of South Carolina
Cruise: AE1206
AE1206
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1206
Tammi Richardson
University of South Carolina
Cruise: AE1219
AE1219
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1219
Tammi Richardson
University of South Carolina
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel