Extension of sea-ice concentration data

23 January 2026, by Stefan Kern

Time series of ASI algorithm Antarctic sea-ice area anomalies

Photo: UHH/CEN/StefanKern

We extended the EUMETSAT OSI SAF OSI-450a / OSI-430a sea ice concentration climate data record (CDR) until 2025-09-30; this data set comes at 25 km grid resolution on an EASE2.0 grid and begins in November 1978:

https://www.cen.uni-hamburg.de/en/icdc/data/cryosphere/seaiceconcentration-osisaf.html

Latest articles

$Area fraction of melt ponds on Arctic sea ice for July 2 through 4, 2009, at 12.5 km (top) and 500 m (bottom) grid resolution$

Photo: UHH/RemonSadikni

11.09.2026|icdc-news-en

New version of Arctic melt-pond fraction

We offer a new version of the Arctic melt-pond fraction on sea ice data set. The new version uses an improved approach and derives daily melt-pond fraction data from MODIS Terra reflectance values of processing V061. The new version covers months June through August of years 2000 through 2024 and is...

IMERG Precipitation amount September 30 2021

Photo: UHH/CEN/StefanKern

27.08.2026|icdc-news-en

Extension of IMERG half-hourly precipitation amount data set

A user pointed us towards gaps in the Integrated Multi-satellitE Retrievals for GPM (IMERG) data set of the half-hourly estimates of the precipitation amount (intensity) in mm/hour. We closed these gaps and extended the data set by one month. The data set (v07) is now available globally at 0.1...