Lisa L. Robbins
Kimberly K. Yates
Matthew D. Gove
Paul O. Knorr
Jonathan Wynn
Robert H. Byrne
Xuewu Liu
2012 March
USGS Arctic Ocean Carbon Cruise 2010: Multiparameter Inorganic Carbon Analyzer (MICA) Data
tabular digital data
Data Series
741
St. Petersburg, FL
U.S. Geological Survey
TBA
Models project the Arctic Ocean will become undersaturated with respect to carbonate minerals in the next decade. Recent field results indicate parts may already be undersaturated in late summer months, when ice melt is at its greatest extent. However, few comprehensive datasets of carbonate system parameters in the Arctic Ocean exist. Researchers from the U.S. Geological Survey (USGS) and University of South Florida (USF) collected high-resolution measurements of pCO2, pH, total dissolved inorganic carbon (DIC), total alkalinity (TA), and carbonate (CO3-2) from the Chukchi Sea and Canada Basin that fill critical information gaps concerning Arctic carbon variability. A Multiparameter Inorganic Carbon Analyzer (MICA) was used to collect over 22,000 measurements of air and sea pCO2, pH, and DIC along a 9,450-km trackline during August 2010. In addition, 240 discrete surface water samples were taken. These data are being used to characterize and model regional pCO2, pH, and carbonate mineral saturation state. A high-resolution, three-dimensional map of these results will be presented.
Data collected on the August 2010 Arctic cruise will be used to create regional maps of seawater carbonate parameters, including pCO2 flux/change maps, and derivative maps on saturation state. Maps depicting pCO2 and carbonate saturation states over large latitudinal and nearshore to offshore gradients are needed for the Arctic, where significant decline of carbonate ecosystems, habitats, and calcifying organisms are predicted over the next decade. The data will allow the USGS to map variations in ocean chemistry along designated tracks and will be used in models to predict future Arctic Ocean saturation states.
2010 August
ground condition
None planned
-168.8
-119.1
85.1
59.2
Ocean Chemistry
Ocean Acidification
pCO2
total carbon
carbon flux
pH
Salinity
Temperature
Geography
Arctic Ocean
Canada Basin
Alaska
Canada
Water
seawater
ocean surface
Year
2010
none
Please acknowledge the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center as a data source in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected by users of this data set.
Lisa Robbins
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Research Oceanographer
physical
600 4th Street South
St. Petersburg
Florida
33701
USA
727-803-8747 x3005
727-803-2032
727-803-2032
8am to 5pm M-F EST
U.S. Geological Survey
St. Petersburg Coastal and Marine Science Center
Microsoft Excel 2010
The QA/QC process looked for internal consistencies in the data by calculating the results using CO2SYS and back checking with the collected data.
These data are collected along tracklines (2-D) and are therefore inherently incomplete. Geologic details between lines must be inferred.
Continuous measurements of pH, pCO2, TCO2, salinity, and temperature were collected from 22:35 UTC on August 3, 2010 to 20:55 UTC on September 5, 2010 using a flow-through Multiparameter Inorganic Carbon Analyzer (MICA) and Sea-Bird SBE49 CTD attached to the flow-through system of the USCGC Healy. Geographic, salinity, temperature, and fluorometric data were also collected using a shipboard Ashtech ADU5 GPS system, a Sea-Bird SBE45 Thermosalinograph, and a Seapoint Chlorophyll Fluorometer (SCF). A complete description of these can be found in Chayes and others (2010). The intake of the shipboard flow-through system was located approximately 8 meters (m) below the sea surface on the port side of the vessel. Water entered the sampling baffles at depth, was pumped to an ice chest for separation of ice, and was then pumped to a de-bubbler and a multiport sampling manifold located in the ship's laboratory. Filtered seawater was then fed to a custom made PVC de-bubbler containing a Sea-Bird SBE49, prior to being transported to the intake port of the MICA. Measurements were taken and logged approximately every 60 seconds except during a MICA flushing cycle, which occurred for approximately 10 min each hour. The MICA was calibrated using Certified Reference Material from Professor Andrew Dickson of the University of California at San Diego. Precision and accuracy for each channel were 0.002 for pH, 2 parts per million (ppm) pCO2, and 2 micromoles per kilogram (umol/kg) for TCO2. Quality of the data as determined by Xuewu Liu (USF) are reported on the HLY1002_MICA.csv spreadsheet.
20120312
1600
HLY1002_MICA.csv
Vector
Entity point
25884
0.0000001
0.0000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000000000000000
298.257223563000030000
HLY1002_MICA.csv
MICA data from the HLY 1002 cruise.
USGS
Date_Time_(UTC)
Date and time (24-hour clock) in Coordinated Universal Time (UTC)
National Institute of Standards and Technology
8/3/2010 22:35
9/5/2010 20:55
dd/mm/yyyy hh:mm
Date_(UTC)
Date in Coordinated Universal Time (UTC)
National Institute of Standards and Technology
8/3/2010
9/5/2010
dd/mm/yyyy
Time_(UTC)
Time (24-hour clock) in Coordinated Universal Time (UTC)
National Institute of Standards and Technology
00:00
23:59
hh:mm
Latitude_(Decimal_Degrees)
Latitude in decimal degrees
WGS 84
59.2
85.1
decimal degrees
Longitude_(Decimal_Degrees)
Longitude in decimal degrees
WGS 84
-179.99
179.99
decimal degrees
Salinity_(PSU)
Salt content, in Practical Salinity Units, measured using the USCGC Healy's SBE45 instrument.
USGS
13.76
32.23
Practical Salinity Units (PSU)
Intake_Temperature_(Celsius)
Intake Sample Temperature, degrees Celsius, measured using the USCGC Healy's SBE3 remote temperature probe.
USGS
-1.59
10.37
Celsius
CT_(micromole/kilogram)
Total amount of inorganic carbon present in seawater in micromoles per kilogram
USGS
-999
No Data value
1086
2209.7
micromoles per kilogram
CT_flag
Numerical code representing reliability of data
USGS
2
No inconsistencies noted; data is not flagged.
4
Data is flagged due to numerical inconsistencies.
pH_(total)_at_25C
pH (total scale) of sample at 25 degrees Celsius
USGS
7.614
8.132
-999
No Data value
pH_flag
Numerical code representing reliability of data
USGS
2
No inconsistencies noted; data is not flagged.
4
Data is flagged due to numerical inconsistencies.
pCO2_(milliatmospheres)_at_25C
Partial Pressure of Carbon Dioxide
USGS
316.2
1160.2
milliatmospheres
-999
No Data value
pCO2_flag
Numerical code representing reliability of data
USGS
2
No inconsistencies noted; data is not flagged.
4
Data is flagged due to numerical inconsistencies.
pCO2_at_in-situ_temp_(Intake_T)
Partial Pressure of Carbon Dioxide at in-situ temperature, which is also the intake temperature
User-Defined
134.8
490.8
milliatmospheres
-999
No Data value
Lisa Robbins
U.S. Geological Survey St. Petersburg Coastal Marine and Science Center
Physical
600 4th Street South
St. Petersburg
Florida
33701
USA
727-803-8747 x3005
Downloadable Data
This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
CSV
2.54 MB
https://pubs.usgs.gov/ds/???/
Free, if obtained online.
20120306
Paul O. Knorr
U.S. Geological Survey
Research Associate
mailing address
600 4th Street South
St. Petersburg
Florida
33701
USA
727-803-8747
727-803-2032
pknorr@usgs.gov
8am to 5pm M-F EST
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
http://www.esri.com/metadata/esriprof80.html
ESRI Metadata Profile