CTD Summary Data

Metadata:

• Identification_Information
• Spatial_Data_Organization_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information
• Distribution_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Steve Okkonen, The University of Alaska Fairbanks, Research Associate Professor of Oceanography

Title: CTD Summary Data

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage: pacmars.eol.ucar.edu

Description:

Abstract:

Extracted summary data from 12000+ CTD casts conducted in the northern Bering, Chukchi, and southern Beaufort Seas from 1970-present. One record per cast. Each record has station information, date, time, location, water depth, cast depth, surface temperature/salinity, bottom temperature/salinity, temperature maximum, stratification parameters (max Brunt-Vaisala frequency, mixed layer depth), fresh water content, and heat content.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19710730

Ending_Date: 20130929

Currentness_Reference: publication date

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: -120.0633

North_Bounding_Coordinate: 75.0

South_Bounding_Coordinate: 62.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories

Theme_Keyword: oceans

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: CTD ocean cast

Theme_Keyword: PacMARS

Theme_Keyword: Ship

Theme_Keyword: Oceans

Theme_Keyword: Ocean Circulation

Theme_Keyword: Water Masses

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Alaska

Place_Keyword: United States of America

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Stephen R. Okkonen

Contact_Electronic_Mail_Address: okkonen@alaska.net

Native_Data_Set_Environment:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.5.4400

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: 12009

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: CDT_28FEB13_DDedits

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: CruiseID

Attribute_Definition: Cruise name/number, project name, or other identifier

Attribute:

Attribute_Label: StationNum

Attribute_Definition: Station/cast number; -999 if none provided

Attribute:

Attribute_Label: StationNme

Attribute_Definition: Station name; -9999 if none provided

Attribute:

Attribute_Label: DataDate

Attribute_Definition: Year, month, and day of cast

Attribute:

Attribute_Label: DataYear

Attribute_Definition: Year of cast

Attribute:

Attribute_Label: DataTime

Attribute_Definition:

hour and minute of cast; 24 hour clock; UTC; -999 if none provided

Attribute:

Attribute_Label: TimeZone

Attribute_Definition: UTC

Attribute:

Attribute_Label: UTCOffset

Attribute_Definition: offset (hours) from UTC

Attribute:

Attribute_Label: Latitude

Attribute_Definition: Decimal latitude of cast

Attribute:

Attribute_Label: Longitude

Attribute_Definition: Decimal longitude of cast; negative (-) for West Longitude

Attribute:

Attribute_Label: Depth

Attribute_Definition:

Bottom depth/pressure (m or dbar); -9999 if missing. In some cases where no bottom depth was provided, the bottom depth was determined to be the sum of deepest depth of the CTD cast and the altimeter reading. Integer value.

Attribute:

Attribute_Label: Nobs

Attribute_Definition:

Number of samples in the cast. If this value is small compared to the Depth and the cast year is during the 1970s or 1980s, the cast data may be bottle data.

Attribute:

Attribute_Label: Tsfc

Attribute_Definition:

Temperature (°C) at shallowest valid depth (pressure) of CTD cast

Attribute:

Attribute_Label: Tdeep

Attribute_Definition:

Temperature at the shallower of deepest depth (pressure) of CTD cast or 200 m

Attribute:

Attribute_Label: Tcast

Attribute_Definition: Temperature at the bottom of the cast.

Attribute:

Attribute_Label: Tmax

Attribute_Definition: Maximum temperature of CTD cast

Attribute:

Attribute_Label: Zsfc

Attribute_Definition: Shallowest valid depth (m) or pressure (dbar) of CTD cast

Attribute:

Attribute_Label: Zdeep

Attribute_Definition:

Maximum depth or pressure of CTD cast; limited to 200 m or shallower

Attribute:

Attribute_Label: Zcast

Attribute_Definition: Maximum depth or pressure of CTD cast

Attribute:

Attribute_Label: ZTmax

Attribute_Definition: Depth/pressure of maximum temperature

Attribute:

Attribute_Label: Ssfc

Attribute_Definition: Salinity at shallowest depth or pressure of CTD cast

Attribute:

Attribute_Label: Sdeep

Attribute_Definition:

Salinity at the shallower of deepest depth (pressure) of CTD cast or 200 m

Attribute:

Attribute_Label: Scast

Attribute_Definition: Salinity at the bottom of the cast

Attribute:

Attribute_Label: STmax

Attribute_Definition: Salinity at depth/pressure of Tmax

Attribute:

Attribute_Label: T5-T100

Attribute_Definition:

Temperatures at integer depths of 5m, 10m, 20m, 30m, 40m, 50m, and 100m. 99.999 if no/missing data

Attribute:

Attribute_Label: S5-S100

Attribute_Definition:

Salinities at integer depths of 5m, 10m, 20m, 30m, 40m, 50m, and 100m. 99.999 if no/missing data

Attribute:

Attribute_Label: BV

Attribute_Definition: maximum Brunt-Vaisala frequency

Attribute:

Attribute_Label: ZBV

Attribute_Definition:

Depth/pressure of maximum Brunt-Vaisala frequency; assumed to be the depth of the pycnocline

Attribute:

Attribute_Label: MLD

Attribute_Definition:

Depth/pressure at which the second derivative of the density profile is maximum. Assumed to be the depth of the mixed layer

Attribute:

Attribute_Label: strat

Attribute_Definition:

Stratification parameter/depth; see Fiedler, P.C., Reilly, S.B., Jewitt, R.P., Demer, D., Philbrick, V.A., Smith, S., Armstrong, W., Croll, D.A., Tershy, B.R., Mate, B.R., 1998. Blue whale habitat and prey in the California channel islands. Deep-Sea Research II 45, 1781–1801.

Attribute:

Attribute_Label: FWC

Attribute_Definition:

Fresh water content (m3). Computed as the surface-to-bottom integral of the fresh water fraction (relative to S = 34.8) at each sample depth. For casts deeper than 200 m, integration is from the surface to 200 m.

Attribute:

Attribute_Label: Heat

Attribute_Definition:

Heat content (MJ). Computed as the surface-to-bottom integral of the heat content (relative to -1.9°C) at each sample depth. For casts deeper than 200 m, integration is from the surface to 200 m

Attribute:

Attribute_Label: Avg S

Attribute_Definition:

Average surface-to-bottom salinity. For casts deeper than 200m, the average is computed from salinities in the upper 200m

Metadata_Reference_Information:

Metadata_Date: 20130321

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Distribution_Information:

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