106.215_North_Pole_Environmental_Observatory_Nutrient_Chlorophyll_and_Hydrographic_Profiles_ISO.xml
eng; USA
utf8
dataset
John P. Christensen
Bigelow Laboratory for Ocean Sciences
180 McKown Point
West Boothbay Harbor
ME
04575
jchristensen@bigelow.org
pointOfContact
John P. Christensen
Bigelow Laboratory for Ocean Sciences
180 McKown Point
West Boothbay Harbor
ME
04575
jchristensen@bigelow.org
author
Scott Pegau
COAS/Oregon State University
(541)737-2528
104 Ocean Admin. Bldg.
Corvalis
OR
97331
spegau@oce.orst.edu
author
Scott Pegau
COAS/Oregon State University
(541)737-2528
104 Ocean Admin. Bldg.
Corvalis
OR
97331
spegau@oce.orst.edu
principalInvestigator
John P. Christensen
Bigelow Laboratory for Ocean Sciences
180 McKown Point
West Boothbay Harbor
ME
04575
jchristensen@bigelow.org
originator
John P. Christensen
Bigelow Laboratory for Ocean Sciences
180 McKown Point
West Boothbay Harbor
ME
04575
jchristensen@bigelow.org
principalInvestigator
2024-03-28
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
https://data.eol.ucar.edu/dataset/106.215
North Pole Environmental Observatory (NPEO) Nutrient, Chlorophyll, and Hydrographic Profiles
2009-06-18T10:01:03Z
publication
1.0
2009-06-18T10:01:03Z
North Pole Environmental Observatory (NPEO) Nutrient, Chlorophyll, and Hydrographic Profiles
2009-06-18T10:01:03Z
creation
UCAR/NCAR - Earth Observing Laboratory
EOL Data Support
PO Box 3000
Boulder
CO
80307-3000
datahelp@eol.ucar.edu
https://data.eol.ucar.edu/
homepage
resourceProvider
106.215
doi:10.5065/D6D798JZ
UCAR/NCAR - Earth Observing Laboratory
EOL Data Support
PO Box 3000
Boulder
CO
80307-3000
datahelp@eol.ucar.edu
https://data.eol.ucar.edu/
homepage
custodian
John P. Christensen
Bigelow Laboratory for Ocean Sciences
180 McKown Point
West Boothbay Harbor
ME
04575
jchristensen@bigelow.org
author
Scott Pegau
COAS/Oregon State University
(541)737-2528
104 Ocean Admin. Bldg.
Corvalis
OR
97331
spegau@oce.orst.edu
author
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).
John P. Christensen
Bigelow Laboratory for Ocean Sciences
180 McKown Point
West Boothbay Harbor
ME
04575
jchristensen@bigelow.org
pointOfContact
Fixed Observation Stations
platform
Oceanography
Arctic
Biology
Ship Based
eng
oceans
-180.00000
180.00000
88.50000
90.00000
2005-04-18T00:00:00Z
2006-04-22T23:59:59Z
https://data.eol.ucar.edu/dataset/106.215
https
North Pole Environmental Observatory (NPEO) Nutrient, Chlorophyll, and Hydrographic Profiles homepage
Dataset homepage
https://data.eol.ucar.edu/project/ARCSS
https
NSF Arctic System Science
Project homepage