be exchanged and made freely available
Oceanic and atmospheric drivers of wintertime sea-ice lead distribution in the Arctic Ocean
This dataset evaluates how ocean and atmosphere conditions relate to the distribution of wintertime sea-ice leads in the Arctic Ocean (November-April, 2002/03-2021/22), following the approach of Willmes et al. (2023). Ocean fields are the mean surface current speed and eddy kinetic energy from the ORAS5 ocean reanalysis; atmospheric fields are the mean ERA5 10 m wind and its divergence. Their link to the ArcLeads lead frequency is measured in two ways: the coincident percentile exceedance (CPE), which marks areas where both the lead frequency and the driver are high, and the correlation of monthly values in 0.5 deg latitude x 3 deg longitude sectors. The dataset also includes the difference between the stress on the sea-ice bottom (ORAS5) and top (ERA5) surfaces, and a cross-comparison of the two methods by region. The results suggest that ocean conditions mainly set where leads form, while the atmosphere mainly drives their changes in space and time.
- Entry ID
- KOPRI-KPDC-00003315
- Copyright
- Science Keyword
- ISO Topic
- Oceans
- Climatology/Meteorology/Atmosphere
- 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
- 2002-11-01 ~ 2022-04-30
- Create/Update Date
- 2026-10-28 / 2026-10-28
- Location
- OCEAN > ARCTIC OCEAN
- Citation
- The data(KOPRI-KPDC-00003315) used in this work was provided by the Korea Polar Research Institute.
- Spatial Coverage
-
POLYGON
- lat:90.000000, lon:-180.000000
- lat:54.000000, lon:180.000000
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Legend
- Raw Data
- File Size 22.01 Mb for 6 items
| Category | File Name | Description | Size | Status |
|---|---|---|---|---|
| Rawdata | report_fig10_stress_diff_CPE_C.nc | Mean magnitude of the stress on the sea-ice top surface (ERA5 surface stress) and bottom surface (ORAS5 surface stress), their difference, and the CPE of the stress difference with the mean lead frequency on the 10 km grid. | 4.66 Mb | Request required |
| Rawdata | report_fig11_corr_LFQ_ERA5div_C.nc | Pearson correlation and p-value between monthly lead frequency and monthly ERA5 10 m wind divergence (120 months), calculated for 0.5 deg latitude x 3 deg longitude sectors and mapped to the 10 km grid; the sector values are also given. | 2.92 Mb | Request required |
| Rawdata | report_fig4_ORAS5_speed_EKE_C.nc | Mean surface (0.5 m) current speed and eddy kinetic energy from ORAS5 on its native ORCA025 grid (about 0.25 deg; 322 x 1442 points north of about 41 deg N), November-April 2002/03-2021/22 (120 months). | 2.98 Mb | Request required |
| Rawdata | report_fig8_CPE_LFQ_ORAS5_C.nc | Coincident percentile exceedance (CPE) of the mean lead frequency with the ORAS5 surface current speed and with eddy kinetic energy on the 10 km polar stereographic grid, with the input fields (ORAS5 values taken from the nearest ORCA025 point) and the mask of cells used for the percentile ranking. | 4.93 Mb | Request required |
| Rawdata | report_fig9_ERA5_wind_divergence_C.nc | Mean ERA5 10 m wind (0.25 deg grid) and the divergence of the mean wind on a 25 km EASE-Grid 2.0 North grid, November-April 2002/03-2021/22 (3,625 days), with a flag for coastal cells masked as land-sea boundary artefacts. | 2.29 Mb | Request required |
| Rawdata | report_figX_swap_CPE_corr_C.nc | Cross-comparison of the two methods: monthly correlations of lead frequency with ORAS5 current speed and eddy kinetic energy (raw and anomaly), the anomaly correlation with ERA5 wind divergence, the CPE of lead frequency with ERA5 wind divergence, and the area fraction of sea-ice cells flagged by each measure in each region. | 4.23 Mb | Request required |