RESTRICTED only accessable in CEN/MPI network or via CliSAP login What does that mean?
Data access via file system: /data/icdc/ice_and_snow/arctic_lead_fraction_cryosat2
Coverage, spatial and temporal resolution
Period and temporal resolution:
- Monthly, January to March (2015: February)
Coverage and spatial resolution:
- Northern hemisphere
- Spatial resolution: 100 km x 100 km, polar-stereographic grid from NSIDC, tangential plane at 70°N and 70°S, respectively
- Geographic longitude: -180°E to 180°E
- Geographic latitude: from about 41°N to 90°N, in the corners of the grid further equatorward
- Dimension: 76 columns x 112 rows
- Altitude: 0.0 m
The data set does not contain uncertainty estimates.
The validation of the lead detection mainly took place based on a comparisons between contemporary visual MODIS scenes and CS-2 tracks. The used classifier has been optimized by these scenes to minimize miss-classification of ice as leads and vice versa.
Independent validation by additional scenes confirms that nearly all leads wider than 250 m are detected. The detection behavior below this width cannot be quantified. Leads covered by newly formed thin ice are also detected but an upper boundary of ice thickness (or age) cannot also be estimated due to missing validation data.
The general lead distribution shows reasonable regional pattern and spatial transitions with slightly higher lead fractions than in previous estimates. This difference to those can be well explained by the ability to detect smaller leads compared, e.g., to the approach used to detect leads from AMSR-E data.
More details are found in the references.
Institute of Oceanography / CEN / University of Hamburg
email: andreas.wernecke (at) uni-hamburg.de
Alfred Wegener Institute for Polar and Marine Research / Bremerhaven
email: lars.kaleschke (at) awi.de
ICDC / CEN / University of Hamburg
email: stefan.kern (at) uni-hamburg.de
Please cite as
"CryoSat-2 lead area fraction for the Arctic, [PERIOD], Integrated Climate Date Center (ICDC, icdc.cen.uni-hamburg.de/), University of Hamburg, Hamburg, Germany, [Month, Year]"
and the main publication Wernecke and Kaleschke (2015) when using this data.