2008-2011 Vessel Collected CTD from the Klondike, Burger, Statoil Study Areas in the Chukchi Sea

Metadata:

• Identification_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information
• Data_Quality_Information
• Distribution_Information

Identification_Information:

Citation:

Citation_Information:

Title:

2008-2011 Vessel Collected CTD from the Klondike, Burger, Statoil Study Areas in the Chukchi Sea

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage: pacmars.eol.ucar.edu

Originator: Dr. Thomas J. Weingartner, University of Alaska

Publication_Date: February 2013

Edition: 2

Online_Linkage: www.chukchiscience.com

Description:

Abstract:

This data set was collected as part of the Chukchi Sea Environmental Studies Program (CSESP), a multi-year, interdisciplinary ecological study focused on areas in outer continental shelf oil and gas leases in the northeastern Chukchi Sea. In 2008 when the program began, two 30 x 30 nautical mile study area boxes were developed around areas of interest to ConocoPhillips and Shell. The ConocoPhillips study area (named Klondike), and the Shell study area (named Burger) became the focus of data collection. Data were collected from these two study areas again in 2009. Then, in 2010, Statoil joined the program, and a third study area, Statoil, was created and sampled as well as Klondike and Burger. In 2011, the scope of the study area was expanded to include the Hanna Shoal Regional Study Area.
The CSESP interdisciplinary studies include acoustic monitoring, baseline chemistry, benthic ecology, chemical oceanography, fisheries ecology, marine mammal ecology, physical oceanography, plankton ecology and nutrients, and seabird ecology.
This data set contains conductivity, temperature, depth (CTD) data collected with a Seabird, Inc. SBE-19+V2 instrument in the Chukchi Sea. CTD data parameters include the station where the data was collected; the cruise the data was collected on; the initials of the CTD operator; the make and model of the CTD instrument; the raw CTD *.hex file name; the dates and times in Greenwich Mean Time that the data was collected; the latitude and longitude of the location the data was collected at; the depth within the water column and the total water depth at which the data was collected; the water pressure, depth, temperature, salinity, conductivity, and chlorophyll fluorescence at the data collection location; the speed of sound in the water; the sigma T; beam attenuation; percent beam transmission; data quality flags as applicable; the name of the contractor who recorded and analyzed the data; the title of the annual report the data set supports; and as applicable, notes regarding a data record.

Purpose:

These data are part of a multi-year baseline environmental studies data set collected as part of the permitting process prior to drilling exploration wells. The objectives of the Chukchi Sea Environmental Baseline Studies Program are: 1. To provide data for pre-exploration and development-related activities 2. To provide data for permit applications 3. To provide input to planning of future operations and associated mitigation 4. To provide additional baseline data that can be used to assess and measure the potential environmental effects of offshore oil and gas exploration and development in the northeastern Chukchi Sea.

Supplemental_Information:

This metadata file has not been reviewed by the contractor who created the data set.
To download the annual reports listed under REPORT field in table, please see www.chukchiscience.org.
Edition 2 Updates: Appended 2011 data, updated metadata to include details about 2011 season, geographic projection updated from NAD83 to WGS84, updated latitude and longitude fields to contain all significant decimal places.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2008

Ending_Date: 2011

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -167.565750

East_Bounding_Coordinate: -159.551717

North_Bounding_Coordinate: 72.607650

South_Bounding_Coordinate: 70.631567

Keywords:

Place:

Place_Keyword: Alaska

Place_Keyword: Chukchi Sea

Place_Keyword_Thesaurus: None

Place_Keyword: Arctic Ocean

Theme:

Theme_Keyword: CTD

Theme_Keyword: Conductivity

Theme_Keyword: Temperature

Theme_Keyword: Depth

Theme_Keyword: Sea Water

Access_Constraints: None

Use_Constraints:

User shall not employ selective use of this data; data must be used in its entirety. User must comprehend all information contained within the metadata, especially as it pertains to data quality and spatial coverage of data. User must ensure that the most recent version of data and metadata are used. User must contact data originator of biological data before using such data in a publication. Acknowledgment of data originator and all points of contact listed for data would be appreciated.

Data_Set_Credit:

ConocoPhillips, Shell, and Statoil would like to express their appreciation to Olgoonik Fairweather, LLC and Dr. Thomas J. Weingartner et al. at the University of Alaska for their efforts in creating this data set.

Security_Information:

Point_of_Contact:

Contact_Information:

Contact_Position: Senior Scientist

Contact_Address:

Address_Type: mailing and physical address

Address: ConocoPhillips, 700 G Street

City: Anchorage

State_or_Province: AK

Postal_Code: 99501

Contact_Instructions:

Please contact Data Distributor for information about obtaining data (see metadata section 6).

Contact_Organization_Primary:

Contact_Organization: ConocoPhillips

Point_of_Contact:

Contact_Information:

Contact_Position: Senior Scientist

Contact_Address:

Address_Type: mailing and physical address

Address: Shell, 3601 C Street, Suite 1000

City: Anchorage

State_or_Province: AK

Postal_Code: 99503

Contact_Instructions:

Please contact Data Distributor for information about obtaining data (see metadata section 6).

Contact_Organization_Primary:

Contact_Organization: Shell

Point_of_Contact:

Contact_Information:

Contact_Position: HSE Manager

Contact_Address:

Address_Type: mailing and physical address

Address: Statoil, 3800 Centerpoint, Suite 920

City: Anchorage

State_or_Province: AK

Postal_Code: 99503

Contact_Instructions:

Please contact Data Distributor for information about obtaining data (see metadata section 6).

Contact_Organization_Primary:

Contact_Organization: Statoil

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 34689

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001

Longitude_Resolution: 0.000001

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Conductivity Temperature Depth (CTD)

Entity_Type_Definition:

A CTD instrument collects conductivity, temperature, and depth data in seawater.

Entity_Type_Definition_Source: CSESP Program

Attribute:

Attribute_Label: STATION

Attribute_Definition:

Code for a sampling location. A two letter prefix designates area and sample type followed by a sequential number padded with zeros if less than one hundred. Fixed, Random, and Historic Drill Site locations were determined before the cruise. Near and Other station locations were assigned in the field.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BD

Enumerated_Domain_Value_Definition: Burger (old) drill site station

Enumerated_Domain_Value_Definition_Source: CSESP Program

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BF

Enumerated_Domain_Value_Definition: Burger fixed station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BM

Enumerated_Domain_Value_Definition: Burger marine-mammal feeding station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BN

Enumerated_Domain_Value_Definition: "near-Burger" (in case ice prevents sampling within the box)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BO

Enumerated_Domain_Value_Definition: Burger other station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BR

Enumerated_Domain_Value_Definition: Burger random station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BT

Enumerated_Domain_Value_Definition: Burger-Wainwright transit station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KD

Enumerated_Domain_Value_Definition: Klondike (old) drill-site station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KF

Enumerated_Domain_Value_Definition: Klondike fixed station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KM

Enumerated_Domain_Value_Definition: Klondike marine-mammal feeding station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KN

Enumerated_Domain_Value_Definition: "near-Klondike" (in case ice prevents sampling within the box)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KO

Enumerated_Domain_Value_Definition: Klondike other station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KR

Enumerated_Domain_Value_Definition: Klondike random station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KT

Enumerated_Domain_Value_Definition: Klondike-Wainwright transit station

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: OT

Enumerated_Domain_Value_Definition: other station elsewhere

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: SHIP

Attribute_Definition: Vessel used for data collection.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Westward Wind

Enumerated_Domain_Value_Definition: Vessel Name

Enumerated_Domain_Value_Definition_Source: CSESP Program

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Norseman II

Enumerated_Domain_Value_Definition: Vessel Name

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Bluefin

Enumerated_Domain_Value_Definition: Vessel Name

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: RECORDED_BY

Attribute_Definition: Initials of CTD operator.

Attribute_Domain_Values:

Unrepresentable_Domain: free text, initials of CTD Operator.

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: INSTRUMENT

Attribute_Definition: Make and model of instrument used to collect CTD data.

Attribute_Domain_Values:

Unrepresentable_Domain:

free text, make and model of instrument used to collect CTD data.

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: RAW_DATAFILE_NAME

Attribute_Definition: Raw data file name with a hex file extension.

Attribute_Domain_Values:

Unrepresentable_Domain: free text, raw data file name with a hex file extension.

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: DATE_TIME_GMT

Attribute_Definition:

Greenwich mean date and time sample collected in mm/dd/yyyy hh:mm:ss AM/PM format.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7/25/2008 00:00:00

Range_Domain_Maximum: 10/10/2010 12:59:59

Attribute_Units_of_Measure: Greenwich Mean Time

Attribute_Measurement_Resolution: Seconds

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: LATITUDE

Attribute_Definition:

Latitude at sample collection location in decimal degrees WGS84.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 90

Attribute_Units_of_Measure: Decimal degrees

Attribute_Value_Accuracy_Information:

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: LONGITUDE

Attribute_Definition:

Longitude at sample collection location in decimal degrees WGS84

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -180

Range_Domain_Maximum: 0

Attribute_Units_of_Measure: Decimal degrees

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: DEPTH_M

Attribute_Definition: Water depth in meters.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 33.4

Range_Domain_Maximum: 45.8

Attribute_Units_of_Measure: Meters

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: DEPTH_SAMPLE_M

Attribute_Definition:

Depth within water column, in meters, at which sample was collected.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 44.5

Attribute_Units_of_Measure: Meters

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: PRESSURE_DBAR

Attribute_Definition: Water pressure at the sample location in decibars.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 45

Attribute_Units_of_Measure: Decibars

Attribute_Measurement_Resolution: 1

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: TEMP_WTR_C

Attribute_Definition: Water temperature at the sample location in degrees Celsius.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1.52

Range_Domain_Maximum: 6.91

Attribute_Units_of_Measure: Celsius

Attribute_Measurement_Resolution: 1

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: SALINITY_PSU

Attribute_Definition:

Salinity of water at the sample location in Practical Salinity Units.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 26.743

Range_Domain_Maximum: 33.543

Attribute_Units_of_Measure: Practical Salinity Units

Attribute_Measurement_Resolution: .001

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: CONDUCTIVITY_S_M

Attribute_Definition: Water conductivity at the sample location in siemens per meter.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.1

Range_Domain_Maximum: 4.026

Attribute_Units_of_Measure: Siemens per meter

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: SOS_WTR_M_SEC

Attribute_Definition: Speed of sound in water in meters per second.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1412.02

Range_Domain_Maximum: 1485.05

Attribute_Units_of_Measure: Meters per second

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: SIGMA_T

Attribute_Definition: Density of water minus 1000 kilograms per cubic meter.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 21.365

Range_Domain_Maximum: 26.948

Attribute_Measurement_Resolution: .001

Attribute_Units_of_Measure: Kilograms per cubic meter

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: BEAM_ATTEN_M

Attribute_Definition: Beam attenuation per meter.

Attribute_Domain_Values:

Range_Domain:

Attribute_Measurement_Resolution: .001

Range_Domain_Minimum: -1.487

Range_Domain_Maximum: 20.655

Attribute_Units_of_Measure: Beam attenuation per meter

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: BEAM_XMISSION_PCT

Attribute_Definition: Percent beam transmission.

Attribute_Domain_Values:

Range_Domain:

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: .001

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: FLUORESCENCE

Attribute_Definition: Chlorophyll fluorescence in the water at the sample location.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.178

Range_Domain_Maximum: 4.986

Attribute_Measurement_Resolution: .001

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: DATA_FLAG

Attribute_Definition: Data quality flag.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0

Enumerated_Domain_Value_Definition: Good data, untouched

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition: Data extrapolated at surface or bottom

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition: Data interpolated mid-water column

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: REPORT

Attribute_Definition: Title of annual report that data supports.

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: CONTRACTOR

Attribute_Definition: Company contracted to collect and/or analyze data.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: UAF

Enumerated_Domain_Value_Definition: University of Alaska Fairbanks

Attribute_Definition_Source: CSESP Program

Attribute:

Attribute_Label: NOTES

Attribute_Definition: For notes concerning this record.

Attribute_Definition_Source: CSESP Program

Overview_Description:

Metadata_Reference_Information:

Metadata_Date: 20130222

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints: None

Metadata_Use_Constraints:

ConocoPhillips, Shell, and Statoil make no representation or warranty, express or implied, with regard to any of these data or metadata, as used alone or in combination with another data set, and expressly disclaim any representation or warranty. It is the responsibility of the data user to fully comprehend the metadata before use of the data. Each person accessing or using the data or metadata assumes all risks and all liabilities arising from or associated with such access or use. ConocoPhillips, Shell and Statoil shall have no responsibility or liability for any errors or omissions in the data or metadata or for any improper or incorrect use of the data or metadata.

Metadata_Security_Information:

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: ConocoPhillips

Contact_Position: Senior Scientist

Contact_Address:

Address_Type: mailing and physical address

Address: ConocoPhillips, 700 G Street

City: Anchorage

State_or_Province: AK

Postal_Code: 99501

Contact_Instructions:

Please contact Data Distributor for information about obtaining data (see metadata section 6).

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Shell

Contact_Position: Senior Scientist

Contact_Address:

Address_Type: mailing and physical address

Address: Shell, 3601 C Street

City: Anchorage

State_or_Province: AK

Postal_Code: 99503

Contact_Instructions:

Please contact Data Distributor for information about obtaining data (see metadata section 6).

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Statoil

Contact_Position: HSE Manager

Contact_Address:

Address_Type: mailing and physical address

Address: Statoil, 3800 Centerpoint

City: Anchorage

State_or_Province: AK

Postal_Code: 99503

Contact_Instructions:

Please contact Data Distributor for information about obtaining data (see metadata section 6).

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

2008 Data Flag Please note that the CTD data that lists "bf08.hex" as the RAW_DATAFILE_NAME may contain duplicate information.
2009 Data Flag Please note that the CTD data that cite the following *.hex files in the RAW_DATAFILE_NAME field may contain the same data. ctd0903_091309_BF006.hex ctd0903_091309_BF011.hex
CSESP Attribute Accuracy Overview When the program began in 2008, scientists collected and stored their data through a variety of methods. Vessel data were collected by individual software packages and backed up as part of the regular computer backups, which may or may not have coincided with backups conducted by the scientists. Each scientist had his or her own method for recording and storing at sea observations and data; some of these methods included paper copies.
The TigerSoft application was developed in 2009 to better manage all scientific data collected through the CSESP. TigerSoft consists of three components: TigerObserver, TigerNav, and TigerObserver Server. Under the oversight of a data manager, these three programs worked in concert with predetermined scientific data protocols to integrate scientific observations with vessel navigation to produce standardized data sets. Data sets were backed up regularly and made available to scientists to proof and edit on a nightly basis during the cruises. TigerSoft was used each season for data collection since it's inception in 2009.
After the conclusion of each field season, data managers merged the TigerSoft daily observation databases of each discipline and distributed the data in Excel spreadsheet format to the primary investigators of each discipline. Primary investigators reviewed their data and signed forms acknowledging the completeness and accuracy of the data. If corrections needed to be made to the data, detailed information regarding the corrections and an edited copy of the data was returned to the data manager. Examples of corrections include updated species identification and deletion of an observation event that was made in error.
Each year the primary investigators spent approximately nine months analyzing their data and then produced a discipline specific annual report for CSESP and a final data set. The final data had to adhere to a predetermined data protocol and pass through a data validation tool in order to be accepted by the data manager. Data that did not pass validation were returned to the primary investigators to be corrected and resubmitted for validation.
In 2009 and 2010 CTD casts were recorded using the TigerSoft application. This data set has been deemed valid by the CSESP data validation tool.
CTD Attribute Accuracy Overview Specifications for the SBE19+ V2 Seacat Profiler used to gather CTD data: Measurement Range: Temperature (C): -5 to +35 Conductivity (S/m): 0 to 9 Pressure: 0 to full scale range (up to 7000 meters)
Initial Accuracy: Temperature (C): 0.005 Conductivity (S/m): 0.0005 Pressure: 0.1% of full scale range
Typical Stability: Temperature (C): 0.0002/month Conductivity (S/m): 0.0003/month Pressure: 0.1% of full scale range/year
Resolution: Temperature (C): 0.0001 Conductivity (S/m): 0.00005 (most oceanic water; resolves to 0.4 ppm in salinity) Pressure: 0.002% of full scale range

The Hemisphere VS100 Heading and Positioning Receiver was used to calculate CTD latitude and longitude; the horizontal accuracy of this instrument was +/-0.6m, and the heading accuracy was +/- 10 degrees at 2.0 m antenna separation.

Logical_Consistency_Report:

The data was processed using Seabird Seaterm software to ensure data quality. Data were processed according to the manufacturer's recommended procedures and further screened for anomalous spikes, dropouts and density inversions. Post-season calibrations of the temperature and conductivity cells were performed at the manufacturer's calibration facility and inspected for reasonable drift since the pre-season calibration. Typical drift of these sensors is less than or equal to 0.005 °C in temperature and 0.02 in salinity.

Completeness_Report:

CTD data was collected from July 25th until October 15th for the 2008 season, August 14th to October 10th for the 2009 season, and August 5th to October 6th for 2010 season. In 2008 and 2009, sampling was conducted in the Klondike and Burger study areas. In 2010 and 2011, sampling was conducted in both of these areas as well as the Statoil study area.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Since 2009, latitude and longitude values were obtained through a Hemisphere VS100 Heading and Positioning Receiver. The horizontal accuracy of the instrument was +/- 0.6 meters.

Lineage:

Process_Step:

Process_Description:

Data Capture Procedures: SBE55 ECO Water Sample was connected to the SBE19+ V2 Seacat Profiler CTD via a 6 pin connector for communication. Seabird Seaterm software was used to configure the two instruments. The magnetic switch on the SBE19+ V2 Seacat Profiler CTD was turned on and the unit (SBE19+ V2 Seacat Profiler CTD and SBE55 ECO Water Sample) was soaked approximately 1 meter under the surface of the water for 1 minute before each deployment. Seabird Seaterm software was used to download both the SBE55 ECO Water Sample data and SBE19+ V2 Seacat Profiler CTD data after each deployment. The data was processed using Seabird Seaterm software to ensure data quality.

Process_Date: Unknown

Process_Step:

Process_Description:

Data were collected with a Seabird SBE-19+V2 CTD sampling at 4 Hz. The instrument was lowered through the water column at a rate of ~0.5m min-1 so that ~480 samples m-1 were obtained. Measured variables include pressure, temperature, conductivity, beam attenuation, beam transmission, and fluorescence. Derived variables include depth, salinity, density, and speed of sound. Data were processed according to the manufacturer's recommended procedures (provided in the SBE Data Processing manual) and further screened for anomalous spikes, dropouts, and density inversions. Data were averaged to 1 decibar (approximately 1 meter) vertical profiles. Post-season calibrations of the temperature and conductivity cells were performed at the manufacturer's calibration facility and inspected for reasonable drift since the pre-season calibration. Typical drift of these sensors is less than or equal to 0.005 °C in temperature and 0.02 in salinity.

Process_Date: Unknown

Distribution_Information:

Resource_Description: Downloadable Data

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: National Center for Atmospheric Research

Contact_Person: Earth Observing Laboratory

Contact_Address:

Address_Type: mailing and physical

Address: 3450 Mitchell Lane

City: Boulder

State_or_Province: CO

Postal_Code: 80301

Country: USA

Contact_Voice_Telephone: 303-497-8154

Contact_Electronic_Mail_Address: codiac@ucar.edu

Contact_Electronic_Mail_Address: stott@ucar.edu

Distribution_Liability:

ConocoPhillips, Shell, and Statoil make no representation or warranty, express or implied, with regard to any of these data or metadata, as used alone or in combination with another data set, and expressly disclaim any representation or warranty. It is the responsibility of the data user to fully comprehend the metadata before use of the data. Each person accessing or using the data or metadata assumes all risks and all liabilities arising from or associated with such access or use. ConocoPhillips, Shell and Statoil shall have no responsibility or liability for any damages caused by any errors or omissions in the data or metadata or by improper or incorrect use of the data or metadata.