The Arctic System Reanalysis (ASR)

Funded by:

- NASA (June 2015 - June 2017) to complete ASRv2 2000-2012

- The National Science Foundation as an International Polar Year (IPY) project

Latest News on ASR (2017/10/18):

ASRv2 15-km has been completed for 2000-2012 and is available at NCAR CISL RDA. Expedited completion was facilitated by the Ohio Supercomputer Center providing enhanced access to their new Owens cluster. A full description of ASRv2 has been submitted to Bulletin of the American Meteorological Society (Manuscript, PDF), accepted with minor revisions.

Our current task is extending ASRv2 15-km through the end of 2016 with an expected completion date of end of 2017. We anticipate continuing ASRv2 through the end of 2020 with a delay of about 3 months behind real time once 2017 is completed.

ASRv1 30-km (formerly ASR final version) is complete for January 1, 2000 - December 31, 2012 and will not be extended. ASRv1 30-km is available at the NCAR CISL RDA. A write-up on ASRv1 is available in Bromwich et al. (2016) see below.

Some results for ASRv2 15-km for 2007

Known issues with ASRv1 30-km


The Arctic System Reanalysis (ASR), which can be viewed as a blend of modeling and observations, provides a high resolution description in space (15 km) and time (3 h) of the atmosphere-sea ice-land surface system of the Arctic. The ASR ingests historical data streams of the physical components of the Arctic. Gridded fields from the ASR, such as temperature, radiation and winds, also serve as drivers for coupled ice-ocean, land surface and other models. The ASR permits reconstructions of the Arctic system's state, thereby serving as a state-of-the-art synthesis tool for assessing Arctic climate variability and monitoring Arctic change.

Recent publications based in part or entirely on ASR