Bug report
From: David Lawrence <dlawren@ucar.edu>
Date: Wednesday, March 14, 2018 at 3:55 PM
To: Staff Member <Ruby.Leung@pnnl.gov>
Subject: Critical bug in CLM that likely affects ELM
Hi Ruby,
I'm not really sure who is in charge of land model development in E3SM anymore so I am sending this to you. Please forward to whoever is responsible.
We found a significant bug (actual series of bugs) in CLM5 with respect to the energy imbalance over land (global energy imbalance of +0.08 W/m2 into land, up from 0.01 W/m2 in CLM4). This energy imbalance will cause the oceans to lose an equivalent amount of heat if the TOA is balanced. We traced the imbalance to features that were introduced in CLM4.5, so these bugs are likely to exist in ELM. See the following pull request for the code modifications required to fix the problems.
https://github.com/ESCOMP/ctsm/pull/307Also see the following issue for further discussion.
https://github.com/ESCOMP/ctsm/issues/304I can provide additional information if necessary.
Regards,
Dave