Articles | Volume 13, issue 8
The Cryosphere, 13, 2087–2110, 2019
https://doi.org/10.5194/tc-13-2087-2019
The Cryosphere, 13, 2087–2110, 2019
https://doi.org/10.5194/tc-13-2087-2019

Research article 01 Aug 2019

Research article | 01 Aug 2019

Permafrost variability over the Northern Hemisphere based on the MERRA-2 reanalysis

Jing Tao et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Jing Tao on behalf of the Authors (11 Oct 2018)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (05 Nov 2018) by Ketil Isaksen
RR by Anonymous Referee #3 (22 Nov 2018)
RR by Anonymous Referee #4 (25 Jan 2019)
RR by Anonymous Referee #5 (07 Feb 2019)
ED: Reconsider after major revisions (25 Feb 2019) by Ketil Isaksen
AR by Jing Tao on behalf of the Authors (04 Jun 2019)  Author's response    Manuscript
ED: Publish as is (26 Jun 2019) by Ketil Isaksen
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Short summary
The active layer thickness (ALT) in middle-to-high northern latitudes from 1980 to 2017 was produced at 81 km2 resolution by a global land surface model (NASA's CLSM) with forcing fields from a reanalysis data set, MERRA-2. The simulated permafrost distribution and ALTs agree reasonably well with an observation-based map and in situ measurements, respectively. The accumulated above-freezing air temperature and maximum snow water equivalent explain most of the year-to-year variability of ALT.