10.5065/D6D798JZ
Christensen, J.
Bigelow Laboratory for Ocean Sciences
Pegau, S.
COAS/Oregon State University
Christensen, J.
Bigelow Laboratory for Ocean Sciences
North Pole Environmental Observatory (NPEO) Nutrient, Chlorophyll, and Hydrographic Profiles. Version 1.0
UCAR/NCAR - Earth Observing Laboratory
2009
scientific data
oceans
Ship Based
Oceanography
Arctic
Biology
Fixed Observation Stations
In Situ Land-based Platforms > > FIXED OBSERVATION STATIONS > > 2219e7fa-9fd0-443d-ab1b-62d1ccf41a89
Conductivity, Temperature, Depth - CTD
In Situ/Laboratory Instruments > Profilers/Sounders > > > CTD > Conductivity, Temperature, Depth > 01cc0beb-7c9a-40ed-ad86-0661b41aee53
Niskin bottles
In Situ/Laboratory Instruments > Samplers > Bottles/Flasks/Jars > > NISKIN BOTTLES > > b79c7e06-cd07-442f-bf12-2019cd71c201
Fluorometers
In Situ/Laboratory Instruments > Chemical Meters/Analyzers > > > FLUOROMETERS > > e904c3c7-0111-4d09-bb01-2b7bea9b4d3f
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITROGEN
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN
EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC MATTER
EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALT TRANSPORT
EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE
EARTH SCIENCE > OCEANS > SALINITY/DENSITY > DENSITY
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > STABLE ISOTOPES
NPEO
ARCSS
NSF Arctic System Science
A - C > ARCSS > Arctic System Science > b8cdc313-fb09-4796-99ac-079de0dcb042
University Corporation For Atmospheric Research (UCAR):National Center for Atmospheric Research (NCAR):Earth Observing Laboratory (EOL):Data Managment and Services (DMS)
Christensen, John P., jchristensen@bigelow.org
Bigelow Laboratory for Ocean Sciences
Christensen, John P., jchristensen@bigelow.org
Bigelow Laboratory for Ocean Sciences
Pegau, Scott, spegau@oce.orst.edu
COAS/Oregon State University
Christensen, John P., jchristensen@bigelow.org
Bigelow Laboratory for Ocean Sciences
2005-04-18T00:00:00Z/2006-04-22T23:59:59Z
2009-06-18T10:01:03Z
en
106.215
https://data.eol.ucar.edu/file/download/41B014DE888/NPB05DOC.PDF
https://data.eol.ucar.edu/file/download/41B014DE889/NPB06DOC.PDF
https://www.eol.ucar.edu/field_projects/arcss
https://data.eol.ucar.edu/arctic_projects/arcss/Data_Policy.html
6 data files
2 ancillary/documentation files
311 KiB
ASCII: ASCII Text (text/plain)
1.0
These data are available to be used subject to the University Corporation for Atmospheric Research ("UCAR") terms and conditions.
This project began an evaluation of nutrients and phytoplankton standing stocks in the central Arctic Ocean based on sampling at the North Pole Environmental Observatory (NPEO). The first sampling occurred in April 2005, the second in April 2006, where eight vertical profiles of hydrographic properties (salinity, temperature, sigma-t), in-situ fluorescence, and nutrients in the region of the NPEO were determined. Vertical profiles of hydrographic, fluorescence, and nutrients over the upper 150 m were obtained using a Sea-Bird SBE-19 CTD (serial number 1923347-2995) combined with a Wetstar model WS3S miniature flow-through fluorometer (serial number 646P), which had an excitation wavelength of 460 nm and an emission wavelength of 695 nm. The continuous CTD profiles were processed using standard SeaSoft software with the results being binned into 0.5 m depth intervals. The fluorometer was calibrated in the laboratory with aqueous solutions of resorufin (Christensen, 2006a). The fluorescence of resorufin was compared with the fluorescence of purified chlorophyll-a (from the algae Anacystis nidulans) dissolved in buffered acetone (10 ml of 1% (weight per volume) magnesium carbonate per L of 90% acetone). These chlorophyll solutions showed a fluorescence of 40.0 times that of resorufin for the same molar concentrations. The output of the fluorometer was first converted to fluorescence of resorufin (mmol/L) and then to that of chlorophyll-a (expressed in microgram-chl/L) using this factor and the molecular weight of chlorophyll-a (893.5 g/mole).
-180.00000
180.00000
88.50000
90.00000