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  • Data  (149)
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  • 1
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    Unknown
    Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, BATS (2001)
    PANGAEA
    In:  Supplement to: Hansell, Dennis A; Carlson, C A (2001): Biogeochemistry of total organic carbon and nitrogen in the Sargasso Sea: control by convective overturn. Deep Sea Research Part II: Topical Studies in Oceanography, 48(8-9), 1649-1667, https://doi.org/10.1016/S0967-0645(00)00153-3
    Details
    Publication Date: 2024-02-01
    Description: The contributions of total organic carbon and nitrogen to elemental cycling in the surface layer of the Sargasso Sea are evaluated using a 5-yr time-series data set (1994-1998). Surface-layer total organic carbon (TOC) and total organic nitrogen (TON) concentrations ranged from 60 to 70 µM C and 4 to 5.5 µM N seasonally, resulting in a mean C : N molar ratio of 14.4±2.2. The highest surface concentrations varied little during individual summer periods, indicating that net TOC production ceased during the highly oligotrophic summer season. Winter overturn and mixing of the water column were both the cause of concentration reductions and the trigger for net TOC production each year following nutrient entrainment and subsequent new production. The net production of TOC varied with the maximum in the winter mixed-layer depth (MLD), with greater mixing supporting the greatest net production of TOC. In winter 1995, the TOC stock increased by 1.4 mol C/m**2 in response to maximum mixing depths of 260 m. In subsequent years experiencing shallower maxima in MLD (〈220 m), TOC stocks increased 〈0.7 mol C/m**2. Overturn of the water column served to export TOC to depth (〉100 m), with the amount exported dependent on the depth of mixing (total export ranged from 0.4 to 1.4 mol C/m**2/yr). The exported TOC was comprised both of material resident in the surface layer during late summer (resident TOC) and material newly produced during the spring bloom period (fresh TOC). Export of resident TOC ranged from 0.5 to 0.8 mol C/m**2/yr, covarying with the maximum winter MLD. Export of fresh TOC varied from nil to 0.8 mol C/m**2/yr. Fresh TOC was exported only after a threshold maximum winter MLD of ~200 m was reached. In years with shallower mixing, fresh TOC export and net TOC production in the surface layer were greatly reduced. The decay rates of the exported TOC also covaried with maximum MLD. The year with deepest mixing resulted in the highest export and the highest decay rate (0.003 1/d) while shallow and low export resulted in low decay rates (0.0002 1/d), likely a consequence of the quality of material exported. The exported TOC supported oxygen utilization at dC : dO2 molar ratios ranging from 0.17 when TOC export was low to 0.47 when it was high. We estimate that exported TOC drove 15-41% of the annual oxygen utilization rates in the 100-400 m depth range. Finally, there was a lack of variability in the surface-layer TON signal during summer. The lack of a summer signal for net TON production suggests a small role for N2 fixation at the site. We hypothesize that if N2 fixation is responsible for elevated N : P ratios in the main thermocline of the Sargasso Sea, then the process must take place south of Bermuda and the signal transported north with the Gulf Stream system.
    Keywords: JGOFS; Joint Global Ocean Flux Study
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Expected Availability
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  • 2
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    Unknown
    Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Ross Sea (2000)
    PANGAEA
    In:  Supplement to: Carlson, C A; Hansell, Dennis A; Peltzer, Edward T; Smith, Walker O Jr (2000): Stocks and dynamics of dissolved and particulate organic matter in the southern Ross Sea, Antarctica. Deep Sea Research Part II: Topical Studies in Oceanography, 47(15-16), 3201-3225, https://doi.org/10.1016/S0967-0645(00)00065-5
    Details
    Publication Date: 2024-02-01
    Description: Dissolved and particulate organic matter was measured during six cruises to the southern Ross Sea. The cruises were conducted during late austral winter to autumn from 1994 to 1997 and included coverage of various stages of the seasonal phytoplankton bloom. The data from the various years are compiled into a representative seasonal cycle in order to assess general patterns of dissolved organic matter (DOM) and particulate organic matter (POM) dynamics in the southern Ross Sea. Dissolved organic carbon (DOC) and particulate organic carbon (POC) were at background concentrations of approximately 42 and 3 µM C, respectively, during the late winter conditions in October. As the spring phytoplankton bloom progressed, organic matter increased, and by January DOC and POC reached as high as 30 and 107 µM C, respectively, in excess of initial wintertime conditions. Stocks and concentrations of DOC and POC returned to near background values by autumn (April). Approximately 90% of the accumulated organic matter was partitioned into POM, with modest net accumulation of DOM stocks despite large net organic matter production and the dominance of Phaeocystis antarctica. Changes in NO3 concentration from wintertime values were used to calculate the equivalent biological drawdown of dissolved inorganic carbon (DICequiv). The fraction of DICequiv drawdown resulting in net DOC production was relatively constant (ca. 11%), despite large temporal and spatial variability in DICequiv drawdown. The C : N (molar ratio) of the seasonally produced DOM had a geometric mean of 6.2 and was nitrogen-rich compared to background DOM. The DOM stocks that accumulate in excess of deep refractory background stocks are often referred to as "semi-labile" DOM. The "semi-labile" pool in the Ross Sea turns over on timescales of about 6 months. As a result of the modest net DOM production and its lability, the role DOM plays in export to the deep sea is small in this region.
    Keywords: 96_4A-10-2; 96_4A-11-2; 96_4A-13-1; 96_4A-14-2; 96_4A-15-2; 96_4A-17-2; 96_4A-18-2; 96_4A-19-1; 96_4A-20-2; 96_4A-2-1; 96_4A-21-1; 96_4A-22-1; 96_4A-23-2; 96_4A-24-2; 96_4A-3-2; 96_4A-4-1; 96_4A-5-1; 96_4A-6-1; 96_4A-7-1; 96_4A-8-1; 96_4A-9-1; 97_1-10-1; 97_1-1-1; 97_1-11-1; 97_1-13-1; 97_1-14-1; 97_1-15-1; 97_1-16-1; 97_1-17-1; 97_1-18-1; 97_1-19-1; 97_1-20-1; 97_1-2-1; 97_1-21-1; 97_1-22-1; 97_1-23-1; 97_1-24-1; 97_1-25-1; 97_1-27-1; 97_1-3-1; 97_1-4-2; 97_1-5-1; 97_1-6-1; 97_1-7-1; 97_1-8-1; 97_1-9-2; 97_3-10-6; 97_3-11-1; 97_3-12-2; 97_3-13-2; 97_3-14-2; 97_3-16-1; 97_3-17-1; 97_3-18-1; 97_3-19-1; 97_3-3-4; 97_3-4-3; 97_3-5-1; 97_3-5-4; 97_3-6-5; 97_3-7-7; 97_3-8-1; 97_3-9-1; 97_8-10-3; 97_8-12-2; 97_8-17-1; 97_8-18-1; 97_8-19-1; 97_8-20-1; 97_8-21-1; 97_8-22-2; 97_8-23-4; 97_8-2-4; 97_8-26-1; 97_8-27-4; 97_8-28-1; 97_8-29-1; 97_8-30-1; 97_8-31-3; 97_8-32-1; 97_8-3-3; 97_8-33-3; 97_8-34-1; 97_8-35-2; 97_8-36-1; 97_8-37-2; 97_8-4-2; 97_8-5-1; 97_8-6-2; 97_8-7-1; 97_8-8-1; 97_8-9-1; Bottle number; Carbon, organic, dissolved; Date/Time of event; DEPTH, water; Event label; JGOFS; Joint Global Ocean Flux Study; Latitude of event; Longitude of event; Oxygen, apparent utilization; Ross Sea; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 4784 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Picoheterotrophs in the Sargasso Sea (2014)
    PANGAEA
    Details
    Publication Date: 2024-02-17
    Keywords: BATS_100382; BATS_100383; BATS_100384; BATS_100385; BATS_100386; BATS_100387; BATS_100388; BATS_100389; BATS_100390; BATS_100391; BATS_100392; BATS_100393; BATS_100394; BATS_100395; BATS_100396; BATS_100397; BATS_100398; BATS_100399; BATS_100400; BATS_100401; BATS_100402; BATS_100403; BATS_100404; BATS_100405; BATS_100406; BATS_100407; BATS_100408; BATS_100409; BATS_100410; BATS_100411; BATS_100412; BATS_100413; BATS_100414; BATS_100415; BATS_100416; BATS_100417; BATS_100418; BATS_100419; BATS_100420; BATS_100421; BATS_100422; BATS_100423; BATS_100424; BATS_100425; BATS_100426; BATS_100427; BATS_100428; BATS_100429; BATS_100430; BATS_100431; BATS_100432; BATS_100433; BATS_100434; BATS_100435; BATS_100436; BATS_100437; BATS_100438; BATS_100439; BATS_100440; BATS_100441; BATS_100442; BATS_100443; BATS_100444; BATS_100445; BATS_100446; BATS_100447; BATS_100448; BATS_100449; BATS_100450; BATS_100451; BATS_100452; BATS_100453; BATS_100454; BATS_100455; BATS_100456; BATS_100457; BATS_100458; BATS_100459; BATS_100460; BATS_100461; BATS_100462; BATS_100463; BATS_100464; BATS_100465; BATS_100466; BATS_100467; BATS_100468; BATS_100469; BATS_100470; BATS_100471; BATS_100472; BATS_100473; BATS_100474; BATS_100475; BATS_100476; BATS_100477; BATS_100478; BATS_100479; BATS_100480; BATS_100481; BATS_100482; BATS_100483; BATS_100484; BATS_100485; BATS_100486; BATS_100487; BATS_100488; BATS_100489; BATS_100490; BATS_100491; BATS_100492; BATS_100493; BATS_100494; BATS_100495; BATS_100496; BATS_100497; BATS_100498; BATS_100499; BATS_100500; BATS_100501; BATS_100502; BATS_100503; BATS_100504; BATS_100505; BATS_100506; BATS_100507; BATS_100508; BATS_100509; BATS_100510; BATS_100511; BATS_100512; BATS_100513; BATS_100514; BATS_100515; BATS_100516; BATS_100517; BATS_100518; BATS_100519; BATS_100520; BATS_100521; BATS_100522; BATS_100523; BATS_100524; BATS_100525; BATS_100526; BATS_100527; BATS_100528; BATS_100529; BATS_100530; BATS_100531; BATS_100532; BATS_100533; BATS_100534; BATS_100535; BATS_100536; BATS_100537; BATS_100538; BATS_100539; BATS_100540; BATS_100541; BATS_100542; BATS_100543; BATS_100544; BATS_100545; BATS_100546; BATS_100547; BATS_100548; BATS_100549; BATS_100550; BATS_100551; BATS_100552; BATS_100553; BATS_100554; BATS_100555; BATS_100556; BATS_100557; BATS_100558; BATS_100559; BATS_100560; BATS_100561; BATS_100562; BATS_100563; BATS_100564; BATS_100565; BATS_100566; BATS_100567; BATS_100568; BATS_100569; BATS_100570; BATS_100571; BATS_100572; BATS_100573; BATS_100574; BATS_100575; BATS_100576; BATS_100577; BATS_100578; BATS_100579; BATS_100580; BATS_100581; BATS_100582; BATS_100583; BATS_100584; BATS_100585; BATS_100586; BATS_100587; BATS_100588; BATS_100589; BATS_100590; BATS_100591; BATS_100592; BATS_100593; BATS_100594; BATS_100595; BATS_100596; BATS_100597; BATS_100598; BATS_100599; BATS_100600; BATS_100601; BATS_100602; BATS_100603; BATS_100604; BATS_100605; BATS_100606; BATS_100607; BATS_100608; BATS_100609; BATS_100610; BATS_100611; BATS_100612; BATS_100613; BATS_100614; BATS_100615; BATS_100616; BATS_100617; BATS_100618; BATS_100619; BATS_100620; BATS_100621; BATS_100622; BATS_100623; BATS_100624; BATS_100625; BATS_100626; BATS_100627; BATS_100628; BATS_100629; BATS_100630; BATS_100631; BATS_100632; BATS_100633; BATS_100634; BATS_100635; BATS_100636; BATS_100637; BATS_100638; BATS_100639; BATS_100640; BATS_100641; BATS_100642; BATS_100643; BATS_100644; BATS_100645; BATS_100646; BATS_100647; BATS_100648; BATS_100649; BATS_100650; BATS_100651; BATS_100652; BATS_100653; BATS_100654; BATS_100655; BATS_100656; BATS_100657; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Event label; Flow cytometry; Latitude of event; Longitude of event; Prokaryotes; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 2330 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    Unknown
    Abundance of Gamma-A nifH genes of the southern Pacific (2013)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Keywords: Calculated after Luo et al. (2012); Chlorophyll a; Comment; CTD, Sea-Bird SBE 911plus; Date/Time of event; DEPTH, water; Determination of phosphate (Murphy & Riley, 1962); Diazotrophs, total biomass as carbon; Event label; Fluorescence-based quantitative real-time PCR (qPCR); Heterocyst, biomass; Latitude of event; Longitude of event; MAREDAT_Diazotrophs_Collection; Nitrate; Phosphate; Richelia, abundance expressed in number of nifH gene copies; Richelia, associated species; Richelia, biological trait, ratio expressed in mass of carbon per amount of nifH gene copies; Salinity; Seawater analysis (Strickland & Parsons, 1968); South Pacific Ocean; SPO2003-03-15; SPO2003-03-16; SPO2003-03-17; SPO2003-03-18; SPO2003-03-19; SPO2003-03-20; SPO2003-03-21; SPO2003-03-22-1; SPO2003-03-22-2; SPO2003-03-24; SPO2003-03-25; SPO2003-03-28; SPO2003-03-29; SPO2003-03-30; SPO2003-03-31; SPO2003-04-02; SPO2003-04-03; SPO2003-04-05; SPO2003-04-06; SPO2003-04-07; SPO2003-04-08; SPO2003-04-09; SPO2003-04-10; SPO2003-04-12; SPO2003-04-13; Temperature, water; Trichodesmium, abundance expressed in number of nifH gene copies; Trichodesmium, biomass as carbon; Trichodesmium abundance, total; Unicellular cyanobacteria, biomass; Unicellular cyanobacteria-A, abundance expressed in number of nifH gene copies; Unicellular cyanobacteria-A, biological trait, ratio expressed in mass of carbon per amount of nifH gene copies; Unicellular cyanobacteria-B, abundance expressed in number of nifH gene copies; Unicellular cyanobacteria-B, biological trait, ratio expressed in mass of carbon per amount of nifH gene copies; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 2993 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
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    Unknown
    Concentration of dissolved organic carbon from water bottle sample at station NBP96-04A-02-1 (2003)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: 10112220; AESOPS; Antarctic Environments Southern Ocean Process Study; Bottle number; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; CTD/Rosette; CTD-RO; DEPTH, water; JGOFS; Joint Global Ocean Flux Study; Nathaniel B. Palmer; NBP9604A; NBP9604A-02-1; Pressure, water; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 6
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    Unknown
    Concentration of dissolved organic carbon from water bottle sample at station NBP96-04A-09-1 (2003)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: 10221232; AESOPS; Antarctic Environments Southern Ocean Process Study; Bottle number; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; CTD/Rosette; CTD-RO; DEPTH, water; JGOFS; Joint Global Ocean Flux Study; Nathaniel B. Palmer; NBP9604A; NBP9604A-09-1; Pressure, water; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 44 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    Concentration of dissolved organic carbon from water bottle sample at station NBP96-04A-11-3 (2003)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: 10251705; AESOPS; Antarctic Environments Southern Ocean Process Study; Bottle number; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; CTD/Rosette; CTD-RO; DEPTH, water; JGOFS; Joint Global Ocean Flux Study; Nathaniel B. Palmer; NBP9604A; NBP9604A-11-3; Pressure, water; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 56 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 8
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    Unknown
    Concentration of dissolved organic carbon from water bottle sample at station NBP96-04A-13-1 (2003)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: 10282356; AESOPS; Antarctic Environments Southern Ocean Process Study; Bottle number; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; CTD/Rosette; CTD-RO; DEPTH, water; JGOFS; Joint Global Ocean Flux Study; Nathaniel B. Palmer; NBP9604A; NBP9604A-13-1; Pressure, water; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 9
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    Unknown
    Concentration of dissolved organic carbon from water bottle sample at station NBP96-04A-14-14 (2003)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: 10301117; AESOPS; Antarctic Environments Southern Ocean Process Study; Bottle number; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; CTD/Rosette; CTD-RO; DEPTH, water; JGOFS; Joint Global Ocean Flux Study; Nathaniel B. Palmer; NBP9604A; NBP9604A-14-14; Pressure, water; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 10
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    Concentration of dissolved organic carbon from water bottle sample at station NBP96-04A-19-1 (2003)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: 11040248; AESOPS; Antarctic Environments Southern Ocean Process Study; Bottle number; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; CTD/Rosette; CTD-RO; DEPTH, water; JGOFS; Joint Global Ocean Flux Study; Nathaniel B. Palmer; NBP9604A; NBP9604A-19-1; Pressure, water; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 36 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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