ICEX buoy drift data 1976-1979
A Norwegian Ice Drift Experiment (ICEX) started in 1976 as part of
a national contribution to the polar programmes under the Global Atmospheric
Research Programme (GARP). The main aim of the experiment
is to obtain information on an important climatic parameter: the export of
ice from the Arctic Ocean through the Fram Strait. The project was reorganized
in 1981, and became a joint programme between Norsk Polarinstitutt
and Det norske meteorologiske institutt, also involving cooperation
with the University of Washington's Arctic Ocean Buoy Program.
An ICEX measuring capsule has been developed in cooperation with
Chr. Michelsens Institutt, Bergen, (Vinje & Steinbakke 1976, Nergaard et al.
1985). The capsule operates effectively in the marginal sea ice areas where
it may be subject to frequent ridging and sporadic drift in water. The buoys
were deployed from a boat in a pilot project in 1975, from a Cessna 185
aircraft landing on the ice in 1976 and 1977, and they have been air-dropped
by the Norwegian Air Force from 1978 onwards. Since 1981 data from the
Norwegian buoys have been included in the Arctic Ocean Buoy Program
data reports edited by the Polar Science Center, University of Washington.
The present data report contains drift tracks and daily values of positions,
air pressure (P) mb, air temperatures (TA) about 80 cm above the ice
surface, and temperatures (TB) at the bottom of the ICEX capsule. The
latter information indicates if the measuring capsule is on the ice or in the
water. When free floating, (TB) gives the temperature about 40 cm below the
sea surface.
During the first five years of the experiment, the air pressure
sensors were built at the Norwegian Meteorological Institute, based on an
aneroid and a displacement transducer. Another Norwegian pressure transducer
has been produced by Aanderaa Instruments. This is based on a silicon
chip as sensing element. The Digiquarts pressure sensor from the US
firm Paro Scientific has also been used since 1981. The sensor resolution is
hetter than 0.1 mb, while the system resolution is 0.4 mb within the normal
variation range of the meteorological variables. Series of comparisons in
the field showed that the mean difference between the data obtained via
Nimbus-6 and the readings on a test set was less than 0.1 mb (Vinje 1978).
Later comparisons showed differences of about 1 mb (Vinje 1981). This was,
however, well inside the FGGE requirements.
The temperature is measured with a radiation shielded termistor.
Fenwal UUA 3213. The system resolution is 0.2°C. The ventilation of the
sensor is dependent upon the wind speed, and the sensor signal is also dependent
upon the heating of the capsule. A series of comparisons in the
field showed that the temperatures were correct within ±0.1 °C during
conditions with normal ventilation (Vinje 1981). A comparison on Fram Ill
(Thorndike et al. 1982) during part of April 1981 indicated temperatures
as much as 1 °C - 2°C too high during the warmest part of each day. Otherwise
the daily cycle was well resolved and the temperature readings from the
ICEX buoy agreed well with the met observer's data.
References
=========
Nergaard, N., Vinje, T. & Finnekåsa, Ø. 1985: Report on ice buoys in theArctic and the Antarctic. Report No. 851129-1 from Chr. Michelsens institutt, Bergen.
Thorndike, A. S., Colony, R. & Munoz, E. A. 1982: [Arctic Ocean Buoy
Program. Data Report 1 January 1981 - 31 December 1981]( http://iabp.apl.washington.edu/pdfs/AOBP1981Thorndike.pdf). Polar
Science Center, University of Washington, Seattle.
Vinje, T. E. 1978: Weather and tide observations at Bouvetøya. Norsk
Polarinstitutt [Skrifter 169]( http://hdl.handle.net/11250/173571).
Vinje, T. E. 1981: Meteorological observations from Bouvetøya. Norsk
Polarinstitutt [Skrifter 175]( http://hdl.handle.net/11250/173651).
Vinje, T. E. & Steinbakke, P. 1976: Nimbus-6 located automatic stations
in the Svalbard waters in 1975. [Norsk Polarinstitutt Årbok 1975]( http://hdl.handle.net/11250/172804).
Simple
- Date (Revision)
- 2018-11-29
- Credit
-
Torgny Vinje
- Credit
-
Øyvind Finnekåsa
- Credit
-
Conrad Helgeland
- Status
- Completed
- Theme
-
-
Trajectory
-
oceanography
-
- Nasjonal tematisk inndeling (DOK-kategori)
-
-
Kyst og fiskeri
-
- Global Change Master Directory (GCMD) Keywords
-
-
OCEANS | SALINITY/DENSITY
-
- Topic category
-
- Oceans
))
- Begin date
- 1976-01-01
- End date
- 1979-12-01
- Distribution format
-
-
Rapport028.pdf (application/pdf)
()
Distributor
- OnLine resource
- https://brage.bibsys.no/xmlui//bitstream/handle/11250/173436/1/Rapport028.pdf ( WWW:DOWNLOAD-1.0-http--download )
-
JSON (edit URI) (application/json)
()
Distributor
- OnLine resource
- https://api.npolar.no/dataset/dbf2b6b1-3cbf-444d-b363-eadbe1e938c0 ( WWW:DOWNLOAD-1.0-http--download )
-
Data (application/zip)
()
Distributor
- OnLine resource
- https://api.npolar.no/dataset/dbf2b6b1-3cbf-444d-b363-eadbe1e938c0/_file/_all/?filename=npolar.1986.dbf2b6b1-data&format=zip ( WWW:DOWNLOAD-1.0-http--download )
-
Buoy data (text/html)
()
Distributor
- OnLine resource
- https://data.npolar.no/dataset/b8b7844c-8ed6-462e-9a64-b0d0ff96ac7c ( WWW:DOWNLOAD-1.0-http--download )
-
Rapport028.pdf (application/pdf)
()
- OnLine resource
- https://brage.bibsys.no/xmlui//bitstream/handle/11250/173436/1/Rapport028.pdf ( WWW:DOWNLOAD-1.0-http--download )
- Statement
-
The data has been extracted from the scanned PDF of the Rapport 28, where data for each buoy is printed like the example image below:

- File identifier
- dbf2b6b1-3cbf-444d-b363-eadbe1e938c0 XML
- Metadata language
- English
- Hierarchy level
- Dataset
- Date stamp
- 2022-05-27
- Metadata standard name
-
CEOS IDN DIF
- Metadata standard version
-
9.8.4
Overviews
Spatial extent
))
Provided by
