Particulate and dissolved organic carbon and nitrogen data from multiple cruises on R / V Wecoma

This dataset contains particulate and dissolved organic carbon and nitrogen data from the GLOBEC Northeast Pacific (NEP) Long-Term Observation Program (LTOP) cruises from 1997 to 2004. The nutrient and extracted chlorophyll data that correspond to this dataset can be also be found in the BCO-DMO database. For further hydrographic information from all cruises, see cruise reports provided on the Northeast Pacific Long Term Observation Program website, or contact Dr. A Huyer at Oregon State University, COAS,104 COAS Admin. Bldg., Corvallis, OR, 97331-5503. All particulate and dissolved organic carbon and nitrogen data in this dataset include cruise station numbers to allow comparison with the hydrographic information found in other data reports.


Dataset Description
This dataset contains particulate and dissolved organic carbon and nitrogen data from the GLOBEC Northeast Pacific (NEP) Long-Term Observation Program (LTOP) cruises from 1997 to 2004.The nutrient and extracted chlorophyll data that correspond to this dataset can be also be found in the BCO-DMO database.

Acquisition Description
At each station, water samples were collected from various depths with 5 L Niskin bottles on a 12 bottle rosette.Complete information on sample collection and analyses is available in the Data Report (PDF).

Processing Description
Complete analyses information is available in the Data Report (PDF).
Data are presented as depth profiles for each station along latitudinal lines.Lines are listed by decreasing latitude and stations are listed from inshore to offshore.Cruise ID and station numbers are included for reference to other cruise data.GMT date and GMT time indicate the date/time at the start of the CTD cast.Depth (pressure in dbar), temperature (Â°C), and salinity are also included as measured by CTD when Niskin bottles were fired (upcast).
Units for POC, PON, DOC and DON are all Î¼M.
BCO-DMO received the data in 8 Excel files, one for each year of sampling.The following modifications were made: deleted blank rows; replaced blank cells with 'nd'; changed column names to conform to BCO-DMO convention; converted .XLS files to .DAT; original time in HH:MM format and date in mm/dd/YYYY format were removed from display; added day_gmt, month_gmt, and time_gmt columns, which are calculated from the original date and time columns.Â The 2004 Wecoma cruise ID was corrected from 'W0409' to 'W0408D' and the Data Report was updated in June 2012 to reflect the change.
[ table of   Starting in April 2000, a Shimadzu TOC-5000A analyzer with an ASI 5000 autosampler was used.

Description
A unit that accurately determines the carbon concentrations of organic compounds typically by detecting and measuring its combustion product (CO2).

For
further hydrographic information from all cruises, see cruise reports provided on the Northeast Pacific Long Term Observation Program website, or contact Dr.A Huyer at Oregon State University, COAS,104 COAS Admin.Bldg., Corvallis, OR, 97331-5503.All particulate and dissolved organic carbon and nitrogen data in this dataset include cruise station numbers to allow comparison with the hydrographic information found in other data reports.

A
station, water samples were collected from various depths with 5 L Niskin bottles on a 12 bottle rosette.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. 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.CNS analyzer and Control Equipment Corp. 440HA CHN elemental analyzer were used for analyses of POC and PON.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.perfomed using a ShimadzuTOC-500 (for 1997 and 1998   samples).The Shimadzu TOC-500 TOC analyzer measures total carbon (TC), inorganic carbon (IC) and total organic carbon (TOC) in water.TC, TOC and IC are measured by the combustion-non-dispersive infrared gas analysis method.
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