be exchanged and made freely available
Atmospheric and sea-ice conditions for flaw-lead opening off Banks Island
This dataset describes the atmospheric and sea-ice conditions under which the flaw lead off the west coast of Banks Island opens, for February-April 2003-2022. The 100 opening onsets were grouped into three circulation patterns by k-means clustering of ERA5 sea-level pressure anomalies, and composites of lead frequency, sea-level pressure and 10 m wind are given around the onset for each pattern. The opening probability is given by 10 m wind direction (20 deg sectors, Wilson 95 % confidence intervals), and by the sea-ice divergence, shear, wind speed and ice thickness over the preceding five days, together with logistic regression models. The dataset also provides the mean sea-ice drift in the Beaufort Sea, the ice area flux through two gates, and the share of the flux that occurs during each opening pattern. Together these data show that opening is driven by offshore winds and the accumulated ice deformation they cause.
- Entry ID
- KOPRI-KPDC-00003314
- Copyright
- Science Keyword
- ISO Topic
- Climatology/Meteorology/Atmosphere
- Oceans
- Personnel
- Jeong-Won Park (jeong-won.park@kopri.re.kr)
- Jinku Park (jinku_park@kopri.re.kr)
- Ji-Han Sim (jhsim@kopri.re.kr)
- Research period
- 2003-02-01 ~ 2022-04-30
- Create/Update Date
- 2026-10-28 / 2026-10-28
- Location
- OCEAN > ARCTIC OCEAN > BEAUFORT SEA
- Citation
- The data(KOPRI-KPDC-00003314) used in this work was provided by the Korea Polar Research Institute.
- Spatial Coverage
-
POLYGON
- lat:79.300000, lon:-145.200000
- lat:65.900000, lon:-91.800000
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Legend
- Raw Data
- File Size 13.26 Mb for 6 items
| Category | File Name | Description | Size | Status |
|---|---|---|---|---|
| Rawdata | Fig02_patterns_lag0.nc | Lead-frequency anomaly (1 km grid around Banks Island), ERA5 sea-level pressure anomaly and 10 m wind (0.25 deg, 58-90 deg N, 155 deg E-95 deg W) on the onset day for each of the three circulation patterns, with the number of events and mean event duration. | 2.52 Mb | Request required |
| Rawdata | Fig03-05_composites.nc | Composites around the opening onset for each circulation pattern: lead-frequency anomaly, sea-level pressure anomaly and 10 m wind maps at several lags, and time series of the coastal-strip lead fraction and the offshore 10 m wind. | 10.35 Mb | Request required |
| Rawdata | Fig06_deformation_thickness.nc | Daily sample (996 days) of sea-ice divergence and shear averaged over the preceding five days, 10 m wind speed, PIOMAS ice thickness and whether the lead opened, with deformation by wind-speed quintile and thickness group, and opening probability by shear and divergence quintile. | 172.75 Kb | Request required |
| Rawdata | Fig07_export.nc | February-April mean sea-ice drift in the Beaufort Sea (2003-2022), positions of the two flux gates (150 deg W and 128 deg W, 71-75 deg N), ice area flux through each gate for each winter, and the share of the flux occurring during the opening events of each circulation pattern. | 187.61 Kb | Request required |
| Rawdata | FigS2_wind_direction.nc | Number of candidate days, number of openings, opening probability with Wilson 95 % confidence limits, and mean wind speed for each 20 deg sector of ERA5 10 m wind direction (February-April 2003-2022). | 30.79 Kb | Request required |
| Rawdata | Table01_logistic_models.csv | Coefficients and statistics of the logistic regression models of Banks Island flaw-lead opening, February-April 2003-2022 (comma-separated text). | 2.54 Kb | Request required |