Improving permafrost physics in the coupled Canadian Land Surface Scheme (v.3.6.2) and Canadian Terrestrial Ecosystem Model (v.2.1) (CLASS-CTEM)

The Canadian Land Surface Scheme and Canadian Terrestrial Ecosystem Model (CLASS-CTEM) together form the land surface component of the Canadian Earth System Model (CanESM). Here, we investigate the impact of changes to CLASS-CTEM that are designed to improve the simulation of permafrost physics. Ove...

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Bibliographic Details
Published in:Geoscientific Model Development
Main Authors: Melton, J.R. (Joe R.), Verseghy, D.L. (Diana L.), Sospedra-Alfonso, R. (Reinel), Gruber, S. (Stephan)
Format: Article in Journal/Newspaper
Language:English
Published: 2019
Subjects:
Active layer thickness
permafrost
Online Access:https://ir.library.carleton.ca/pub/25612
https://doi.org/10.5194/gmd-12-4443-2019
Description
Summary:The Canadian Land Surface Scheme and Canadian Terrestrial Ecosystem Model (CLASS-CTEM) together form the land surface component of the Canadian Earth System Model (CanESM). Here, we investigate the impact of changes to CLASS-CTEM that are designed to improve the simulation of permafrost physics. Overall, 18 tests were performed, including changing the model configuration (number and depth of ground layers, different soil permeable depth datasets, adding a surface moss layer), and investigating alternative parameterizations of soil hydrology, soil thermal conductivity, and snow properties. To evaluate these changes, CLASS-CTEM outputs were compared to 1570 active layer thickness (ALT) measurements from 97 observation sites that are part of the Global Terrestrial Network for

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