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GEOS-ESM / GEOSgcm_App

Repo containing the scripts for running the GEOS Earth System Model GCM
Apache License 2.0
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M21C exports and LONG_NAMES for land water and energy balances #630

Closed gmao-rreichle closed 1 month ago

gmao-rreichle commented 1 month ago

As in #621 but for M21C.

A couple of open questions:

  1. I had always thought that the "lnd" uses conservative regridding, but this doesn't seem to be the case: https://github.com/GEOS-ESM/GEOSgcm_App/blob/66fb5df1b187c8fe69858fea5790a95ddb1fb8bf/HISTORY_R21C.rc.tmpl#L1215 There is no "regrid_method" in the M-2 HISTORY file, but the MAPL version used in M-2 probably works differently.

  2. Do we know what "deflate" does? Is it a lossless or lossy compression? https://github.com/GEOS-ESM/GEOSgcm_App/blob/66fb5df1b187c8fe69858fea5790a95ddb1fb8bf/HISTORY_R21C.rc.tmpl#L1214

sdrabenh commented 1 month ago

As in #621 but for M21C.

A couple of open questions:

  1. I had always thought that the "lnd" uses conservative regridding, but this doesn't seem to be the case: https://github.com/GEOS-ESM/GEOSgcm_App/blob/66fb5df1b187c8fe69858fea5790a95ddb1fb8bf/HISTORY_R21C.rc.tmpl#L1215

BILINEAR_MONOTONIC is the default method for most collections. However, this could be changed to any of these regridding options if desired - especially for budget terms.

There is no "regrid_method" in the M-2 HISTORY file, but the MAPL version used in M-2 probably works differently.

  1. Do we know what "deflate" does? Is it a lossless or lossy compression? https://github.com/GEOS-ESM/GEOSgcm_App/blob/66fb5df1b187c8fe69858fea5790a95ddb1fb8bf/HISTORY_R21C.rc.tmpl#L1214

The deflate attribute specifies lossless compression. On the other hand, setting nbits performs "bit shaving" and would be lossy compression.

sdrabenh commented 1 month ago

@gmao-rreichle merging based on preliminary results. Will continue testing and make further changes if necessary.