Daily sea ice lead data for Arctic and Antarctic

The data show the long-term relative sea ice lead frequencies for the Arctic (November – April 2002/03 – 2018/19) and Antarctic (April – September 2003 – 2019), respectively. The data are projected onto the coordinate grid EPSG:3413 (ARC) and ESPG:3412 (ANT) at a spatial resolution of 1 km² and are...

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Bibliographic Details
Main Authors: Reiser, Fabian, Willmes, Sascha, Heinemann, Günther
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
Arctic
CATS
CATS - The Changing Arctic Transpolar System
Event label
File format
File name
File size
leads
pan-Antarctica
pan-Arctic
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
satellite data
Sea ice
SPP1158
Uniform resource locator/link to file
Antarctic
The Antarctic
Antarc*
Antarctica
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.917588
https://doi.org/10.1594/PANGAEA.917588
Description
Summary:The data show the long-term relative sea ice lead frequencies for the Arctic (November – April 2002/03 – 2018/19) and Antarctic (April – September 2003 – 2019), respectively. The data are projected onto the coordinate grid EPSG:3413 (ARC) and ESPG:3412 (ANT) at a spatial resolution of 1 km² and are stored as NetCDF4 files. Ice surface temperature data (MYD/MOD29 col. 6 [Hall and Riggers, 2015]) from the Moderate-Resolution Imaging Spectroradiometer (MODIS) are used to derive daily observations of sea ice leads in both polar regions. Sea ice leads are defined as significant local surface temperature anomalies and they are automatically identified during a two-stage process, including 1) the tile-based retrieval of potential sea ice leads and 2) the identification of cloud artefacts using fuzzy logic (see Reiser et al., 2020 for further details [Reiser et al., 2020]). Subsequently, all daily sea ice lead maps are combined to long-term averages showing the climatological distribution of leads in the Arctic and Antarctic, respectively. The dataset represents an update for the Arctic (Willmes & Heinemann, 2016 [Willmes and Heinemann, 2016]) and is the first for the Antarctic. These maps reveal, that multiple distinct features with increased lead frequencies are present that are related to bathymetric structures, e.g. the continental shelf break or ridges and troughs.

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