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OAS accession Detail for 0278334
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| accessions_id: | 0278334 | archive |
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| Title: | Niskin bottle water samples and CTD measurements from the Hawaii Ocean Time-Series cruises from 1988-2016 (HOT project) (NCEI Accession 0278334) |
| Abstract: | This dataset contains biological, chemical, and physical data collected during deployment HOT_cruises in the North Pacific Ocean from 1988-10-30 to 2016-11-28. These data include 19-prime-butanoyloxyfucoxanthin, 19-prime-hexanoyloxyfucoxanthin, Dissolved Organic Nitrogen, Nitrite, Nitrous Oxide, Silicate, Total Dissolved Nitrogen, Total Dissolved Phosphorus, carotene, carotene-alpha, carotene-beta, chlorophyll a, chlorophyll b, chlorophyllide a, d15N, depth, diadinoxanthin, dissolved Oxygen, dissolved inorganic Carbon, dissolved organic Carbon, divinyl chlorophyll a, fucoxanthin, monovinyl chlorophyll a, nitrate plus nitrite, pCO2, pH, particulate inorganic Carbon as Calcite, potential temperature, prasinoxanthin, reactive phosphorus (PO4), salinity calculated from CTD primary sensors, sigma-t, total alkalinity, total phaeopigment, violaxanthin, water pressure, water temperature, and zeaxanthin. The instruments used to collect these data include CTD Sea-Bird 911 and Niskin bottle. These data were collected by David M. Karl of University of Hawaii at Manoa as part of the "Hawaii Ocean Time-series (HOT): Sustaining ocean ecosystem and climate observations in the North Pacific Subtropical Gyre (HOT)" project and "Ocean Carbon and Biogeochemistry (OCB)", "Ocean Time-series Sites (Ocean Time-series)", and "U.S. Joint Global Ocean Flux Study (U.S. JGOFS)" programs. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2019-07-15. The following is the text of the dataset description provided by BCO-DMO: Niskin bottle water samples and CTD measurements at water sample depths from the Hawaii Ocean Time-Series (HOT) Dataset Description: Monthly measurements of the thermohaline structure, water column chemistry, and primary production were collected at station ALOHA as part of the HOT program. |
| Date received: | 20190715 |
| Start date: | 19881030 |
| End date: | 20161128 |
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| West boundary: | -158.857 |
| East boundary: | -157.457 |
| North boundary: | 23.438 |
| South boundary: | 21.228 |
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| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
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| Supplementary information: | Acquisition Description: Sampling at Station ALOHA typically begins with sediment trap deployment followed by a deep (> 4700 m) CTD cast and a "burst series" of at least 13 consecutive 1000 m casts, on 3-h intervals, to span the local inertial period (~ 31 h) and three semidiurnal tidal cycles. The repeated CTD casts enable us to calculate an average density profile from which variability on tidal and near-inertial time scales has been removed. These average density profiles are useful for the comparison of dynamic height and for the comparison of the depth distribution of chemical parameters from different casts and at monthly intervals. This sampling strategy is designed to assess variability on time scales of a few hours to a few years. Very high frequency variability ( Water samples for a variety of chemical and biological measurements are routinely collected from the surface to within 10 m of the seafloor. To the extent possible, we collect samples for complementary biogeochemical measurements from the same or from contiguous casts to minimize aliasing caused by time-dependent changes in the density field. This approach is especially important for samples collected in the upper 350 m of the water column. Furthermore, we attempt to sample from common depths and specific density horizons each month to facilitate comparisons between cruises. Water samples for salinity determinations are collected from every water bottle to identify sampling errors. Approximately 20% of the water samples are collected and analyzed in duplicate or triplicate to assess and track our precision in sample analyses. At Stations Kahe, ALOHA and Kaena, water samples for chemical analyses were collected from discrete depths using 12 liter PVC bottles with nylon coated internal springs as closing mechanisms. Sampling strategies and procedures are well documented in the previous Data Reports and in the HOT Program Field and Laboratory Protocols manual. |
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| Metadata version: | 1 |
| Keydate: | 2023-05-17 11:57:49+00 |
| Editdate: | 2023-05-17 11:59:27+00 |