North Pole Environmental Observatory NSF Grant OPP-9910305 2000-2003 Ice Temperature and Mass Balance Buoy Data Deployed by Pacific Marine Environmental Laboratory (PMEL) and Cold Regions Research and Engineering Laboratory (CRREL) Directories/Files in this directory- NPEO2000-2002_IceBuoys_ReadMe.txt (this document) NP2000 CRREL Ice Buoys/ NPEO2000_22206_Ice.temp NPEO2000_22206.pos NPEO2000_20726_Ice.temp NPEO2000_20726.pos NP2001 CRREL Ice Buoys/ NPEO2001_22203_Ice.temp NPEO2001_22203.pos NP2002 CRREL Ice Buoys/ NPEO2002_21078_Ice.temp NPEO2002_21078_Ice.snd NPEO2002_09120_Ice.temp NPEO2002_icebuoys.pos _______________________________________ NPEO PMEL/CRREL Ice Temperature and Mass Balance Buoys for 2000, 2001, and 2002. Because of the large temperature arrays presented by the CRREL buoys, their data is provided in two or three separate files - Internal Ice Temperature (C) from the air through the ice into the ocean beneath typically every 10 cm and every 12 hours (.temp files) These files contain two headers; one which identifies the buoy, followed by one which lists the heights/depths at which temperature was measured. A depth of 0 is the position of the top of the ice at the time of deployment, positive numbers are heights above the surface of the ice, negative numbers are depths from the top surface of the ice. The remaining lines of the file list the temperatures at the depths/heights of the header, one line every 12 hours. Temperatures were measured at 11:30 GMT and 23:30 GMT (in some years 12Z and 24Z) each day. Missing data are marked '1.e35'. - Position from GPS (.pos files) Positions were determined every hour, and the file lists the position at 11:00 and 23:00. In 2002, the GPS units failed in both ice buoys before the end of the drift. The positions file included here 'NPEO2002_icebuoys.pos' is from the Weather station buoy 22207 deployed on the same floe. - Mass balance buoys also measured two distances with acoustic pingers (.snd files) They determined the distance (m) from the snow and ice to a pinger mounted on a post, and the distance from the bottom of the ice to an upward-looking underwater pinger. Buoy 21078 at NPEO2002 is an axample. These buoys were complimented by PMEL Weather and Radiometer buoys as well as the JCAD Buoys deployed by JAMSTEC. The PMEL Buoys deployed at NPEO 2000 and 2001 were severely damaged in early ice breakups and did not collect a useful record. NPEO 2002-2003 PMEL Argos Buoys- 22207 (PMEL Weather station) 20726 (PMEL Kipp&Zonen radiometers) 22204 (PMEL Eppley radiometers) Profile plots and other analysis using these data may be viewed at the NPEO website (http://psc.apl.washington.edu/northpole/Buoys.html). For further information concerning NPEO, please contact Dr. James Morison morison@apl.washington.edu (206) 543-1394 Roger Andersen roger@apl.washington.edu (206) 543-1258 at Polar Science Center, Applied Physics Lab, University of Washington 1013 NE 40th, Seattle, WA 98105-6698 USA FAX (206) 616-3142 For further information concerning these data, please contact Dr. James E. Overland James.E.Overland@noaa.gov (206) 526-6795 Sigrid Salo sigrid.a.salo@noaa.gov (206) 526-6802 at Pacific Marine Environmental Laboratory (PMEL) NOAA R/PMEL, 7600 Sand Point Way N.E., Seattle, WA 98115-6349 or Dr. Don Perovich Donald.K.Perovich@erdc.usace.army.mil Dr. Jacqueline Richter-Menge Jacqueline.A.Richter-Menge@erdc.usace.army.mil Bruce Elder Bruce.C.Elder@erdc.usace.army.mil ERDC-CRREL-RS ( Snow and Ice Branch ) 72 Lyme Road Hanover, NH 03755-1290