N-ICE2015 total (snow and ice) thickness data from EM31
Total ice and snow thickness was measured with portable electromagnetic instruments (EM31 and EM31SH, Geonics Ltd., Mississauga, Ontario, Canada) mounted on a sledge. The EM31s measure the received secondary electromagnetic field, induced by highly conductive seawater (Kovacs et al., 1991). Conductivity values are calibrated with drill hole measurements and post processed according to Haas et al., 1997.
[Figure 1]( https://api.npolar.no/dataset/70352512-fed8-4f1d-8b9c-30e6a764f5c2/_file/f5fa353f31a63b4d4167379acc785e73) shows the calibration curves for the two EM instruments used throughout the experiment.
In total 101 and 145 calibration drillings were made for EM31SH and EM31, respectively, covering a thickness range from 0.15 m to 4.50 m ice. Analysis of the calibration measurements did not reveal any drift in the fitting curve parameters on the temporal or spatial scales.
The footprint size of the EM31 ranges from 3 m to 5 m, depending on the ice and snow thickness. Accuracy of EM31 measurements is in the range of +-0.1 m for level ice, becoming higher for rough and deformed ice.
On all four Floes, independent (i) and repeated transects (t, tF, tM) with combined EM31 and snow depth measurements were performed.
Repeated transects are considered as repetitions of marked tracks on a weekly basis to observe temporal change, while independent transects are long surveys in different directions from the main ice camp are to cover the spatial variability of the surrounding area.
Simple
- Date (Revision)
- 2019-10-21
- Credit
-
Anja Rösel
- Credit
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Dmitry Divine
- Credit
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Jennifer A. King
- Credit
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Marcel Nicolaus
- Credit
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Gunnar Spreen
- Credit
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Polona Itkin
- Credit
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Christopher M. Polashenski
- Credit
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Glen E. Liston
- Credit
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Åse Ervik
- Credit
-
Martine Espeseth
- Credit
-
Andrea Gierisch
- Credit
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Jari Haapala
- Credit
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Nina Maaß
- Credit
-
Annu Oikkonen
- Credit
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Anaïs Orsi
- Credit
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Alexey Shestov
- Credit
-
Caixin Wang
- Credit
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Sebastian Gerland
- Credit
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Mats A. Granskog
- Status
- Completed
- Theme
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Lance
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ICE
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N-ICE2015
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Floe-1
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Floe-2
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Floe-3
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Floe-4
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Leg-1
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Leg-2
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Leg-3
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Leg-4
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Leg-5
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Leg-6
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WP3
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marine
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seaice
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- Nasjonal tematisk inndeling (DOK-kategori)
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Kyst og fiskeri
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- Global Change Master Directory (GCMD) Keywords
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OCEANS | SEA ICE | SNOW DEPTH
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OCEANS | SEA ICE | ICE DEPTH/THICKNESS
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OCEANS | SEA ICE
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- Topic category
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- Oceans
))
- Begin date
- 2015-01-11
- End date
- 2015-06-24
- Distribution format
-
-
JSON (edit URI) (application/json)
()
Distributor
- OnLine resource
- https://api.npolar.no/dataset/70352512-fed8-4f1d-8b9c-30e6a764f5c2 ( WWW:DOWNLOAD-1.0-http--download )
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N-ICE2015_EM31_v1.zip (application/zip)
()
Distributor
- OnLine resource
- https://api.npolar.no/dataset/70352512-fed8-4f1d-8b9c-30e6a764f5c2/_file/N-ICE2015_EM31_v1.zip ( WWW:DOWNLOAD-1.0-http--download )
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N-ICE 2015 datasets (text/html)
()
Distributor
- OnLine resource
- https://data.npolar.no/dataset/7f7e56d0-9e70-4363-b37d-17915e09a935 ( WWW:DOWNLOAD-1.0-http--download )
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npolar.2016.70352512.zip (application/zip)
()
Distributor
- OnLine resource
- https://api.npolar.no/dataset/70352512-fed8-4f1d-8b9c-30e6a764f5c2/_file/_all?filename=npolar.2016.70352512.zip&format=zip ( WWW:DOWNLOAD-1.0-http--download )
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Data (application/zip)
()
Distributor
- OnLine resource
- https://api.npolar.no/dataset/70352512-fed8-4f1d-8b9c-30e6a764f5c2/_file/_all/?filename=npolar.2016.70352512-data&format=zip ( WWW:DOWNLOAD-1.0-http--download )
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N-ICE2015 (text/html)
()
Distributor
- OnLine resource
- https://data.npolar.no/project/b98886ce-590a-48a8-b113-4b96e98c65c8 ( WWW:LINK-1.0-http--link )
-
JSON (edit URI) (application/json)
()
- OnLine resource
- https://api.npolar.no/dataset/70352512-fed8-4f1d-8b9c-30e6a764f5c2 ( WWW:DOWNLOAD-1.0-http--download )
- Statement
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Data is provided as CSV textfiles.
The filename contains date in format YYYYMMDD, thereafter unique line number, thereafter either i (independant), t (transect), tF (transect on FYI only), or tM (transect on MYI only).
Variables
* lonres: driftcorrected WGS84 longitude
* latres: driftcorrected WGS84 latitude
* thickres [m]: total thickness
* gpstimeres: time (matlab)
Figure 1
- File identifier
- 70352512-fed8-4f1d-8b9c-30e6a764f5c2 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
))
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