Gridded active layer thickness across northern permafrost regions from 2003 to 2020

Published November 3, 2023 | Version v1

Dataset Open

This dataset provides the annual gridded active layer thickness (ALT) across northern permafrost regions (NPR) at 1 km resolution for the period 2003–2020. The ALT in permafrost regions refers to the upper layer of soil that thaws and refreezes annually as a result of seasonal temperature variations. It is a critical parameter in permafrost studies because it determines the depth to which plant roots can penetrate and influences various ecological and engineering processes. This dataset was produced based on the relationship between available ALT site measurements (2966 site-years) and satellite observations of annual gridded predictors, including vegetation, temperature, soil, and topography, using a Random Forest (RF) approach. The annual ALT map for the NPR was generated using the ensemble mean of ALT from the ten best RF predictions. Extensive uncertainty analysis was also conducted.
The dataset can be viewed at https://liuzh833.users.earthengine.app/view/altv1

Files

Name	Size	Download all
ALT_2003.tif md5:4937efada42736dce17dd705387778fd	103.4 MB	Preview Download
ALT_2004.tif md5:b24948c3ab8bbc700e0bec6c28e04456	102.3 MB	Preview Download
ALT_2005.tif md5:6cd466b9631d9ccb53444fa23b59962e	103.4 MB	Preview Download
ALT_2006.tif md5:d44a184984130234da40e29e82a53ae8	103.3 MB	Preview Download
ALT_2007.tif md5:f3ffda1d3e8d67804f5fc1a2aee14213	103.2 MB	Preview Download
ALT_2008.tif md5:2514789b32dd370b46759e548063a775	103.1 MB	Preview Download
ALT_2009.tif md5:b553589edaa8bd4cb41bed4c9a75bd7f	103.4 MB	Preview Download
ALT_2010.tif md5:5f243441a44f7e7ab060a223113509ce	103.8 MB	Preview Download
ALT_2011.tif md5:ce6538d329d7e3d3bc2a4d5a9e0cd5ce	103.9 MB	Preview Download
ALT_2012.tif md5:c60c6d276c4e0c5bf340d5fa51bfefce	104.1 MB	Preview Download
ALT_2013.tif md5:4b06bf3f2df8cd30687fd714bf4c5f7b	103.6 MB	Preview Download
ALT_2014.tif md5:0dfcd38b25f385017b35a647e47a231f	103.0 MB	Preview Download
ALT_2015.tif md5:9095fc69e6cf212a90cfca5701b52fc7	103.4 MB	Preview Download
ALT_2016.tif md5:85c6cf5e7581075d41a3483788b73749	103.8 MB	Preview Download
ALT_2017.tif md5:a35e4f143d0f13a0ca3b19e56f91edbc	103.5 MB	Preview Download
ALT_2018.tif md5:2946b23c17928bf2e7b034c2ed533e05	103.5 MB	Preview Download
ALT_2019.tif md5:d11b3fbf3a37ed88a2e901917acb4a16	103.8 MB	Preview Download
ALT_2020.tif md5:56e8d7c8b5e841a23a43812f10b7200e	104.1 MB	Preview Download

Is published in: Journal article: Widespread deepening of the active layer in northern permafrost regions from 2003 to 2020 (Other)