Other ID: none
Status: Completed
Organization(s): USGS, Woods Hole Coastal and Marine Science Center, USGS, National Center
Funding Program(s):
Principal Investigator(s): Arthur Lachenbruch, Vaughn Marshall
Affiliate Investigator(s):
Information Specialist(s): Carolyn Ruppel
Data Type(s): Environmental Data: Temperature
Scientific Purpose/Goals: Acquisition of marine heat flow data and associated sediment cores and thermal measurements from T-3 Fletcher's ice island as it circulated through the Western Arctic for nearly a decade.
Vehicle(s):
Start Port/Location: none (on ice floe)
End Port/Location: none (on ice floe)
Start Date: 1963-02-01
End Date: 1973-11-30
Equipment Used: Heat flow
Information to be Derived: thermal gradients, in situ radiogenic heat content, sediment characterization, bottom water temperatures in Western Arctic Ocean
Summary of Activity and Data Gathered: A total of 584 casts were made from T-3 to measure heat flow. Approximately 1.486 km of core was obtained from 546 of these. The remaining 38 casts included 2 that had rocks stuck in the coring tip, 3 where the complete probe was lost, and 2 where the cores were lost. Thermal gradients, thermal conductivity values, and heat flow data were successfully acquired for 356 stations.
Staff: Other
Affiliate Staff:
Notes: Please make lead organization just generic: "USGS"
Please make lead scientists Arthur Lachenbruch and Vaughn Marshall, with no emails attached. We may change that later after I speak with Art, who is very elderly.
Please put me on as the contact person/alternate personnel and have my email linked to this activity.
The exact number of days in the field is probably over 2000. As we finalize this FA, I will try to calculate the total number of days more accurately.
The "platform" is literally a floating ice island called T-3/Fletcher's Ice Island.
Location:
Western Arctic Ocean, between Alpha-Mendeleev Ridge and Greenland margin. Arctic Ocean (Amerasian Basin), including Canada Basin, Mendeleev Ridge, Alpha Ridge, and Nautilus Basin
| Boundaries | |||
|---|---|---|---|
| North: 84.89369594 | South: 73.67953518 | West: -179.5703125 | East: -52.2265625 |
Platform(s):
Fletchers Ice Island - T3 |
Lachenbruch, A.H., Marshall, B.V., and Ruppel, C.D., 2019, Post-expedition report for USGS T-3 Ice Island heat flow measurements in the High Arctic Ocean, 1963-1973: U.S. Geological Survey data release, https://doi.org/10.5066/P91XQ3IS.
Ruppel, C.D., Lachenbruch, A.H., Hutchinson, D.R., Munroe, R., and Mosher, D.C., 2019, Heat flow in the Western Arctic Ocean (Amerasian Basin): Journal of Geophysical Research: Solid Earth, v. 124 no. 8, p.7562-7587, https://doi.org/10.1029/2019JB017587.
Ruppel, C.D., Hutchinson, D.R., Lachenbruch, A.H., and Hall, J.K., 2019, Thermal data and navigation for T-3 (Fletcher's) Ice Island Arctic Ocean heat flow studies, 1963-73 (ver. 1.1, December 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P97EPU2F.
| Title | Survey Equipment | Description |
|---|---|---|
| Post-expedition report for USGS T-3 ice island heat flow measurements in the High Arctic Ocean, 1963-1973 | (document not focused on specific equipment) | Previously unpublished report from the 1970s, including heat flow measurements and radiogenic heat determinations in the High Arctic Ocean collected from 1963 to 1973. The report contains both valuable scientific information as well as data. |
| Survey Equipment | Survey Info | Data Type(s) | Data Collected |
|---|---|---|---|
| Heat flow | --- | Temperature | USGS T-3 enhanced thermal data from T-3 Ice Island (Enhanced version of the T-3 heat flow data with additional information about the heat flow stations and conversions to SI units.) USGS T-3 Original thermal gradient, thermal conductivity, and heat flow data from T-3 Ice Island (Digital version of the original data table recording the T-3 thermal gradients, thermal conductivity values, and heat flow for the 356 successful stations.) Radiogenic heat content for selected cores (Radiogenic heat content at 26 locations where heat flow measurements were attempted by the USGS in the Arctic Ocean between 1963 and 1973.) T-3 Ice Island one hour navigation: May 14, 1962 to September 15, 1974 (1-hour navigational data and some gravity anomaly and magnetic anomaly data for the T-3 ice island circuit of the Amerasian Basin from 1962 to 1974.) |
