Skip to content

Fix sea ice time series cache functionality #1130

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
xylar merged 2 commits into from
Dec 9, 2025
Merged

Fix sea ice time series cache functionality #1130

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5f8475d
Concatenate cache and new data for sea ice time series
cbegeman Dec 8, 2025
e8e2b13
Mask data time entries using isel
cbegeman Dec 8, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
39 changes: 24 additions & 15 deletions mpas_analysis/sea_ice/time_series.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
# https://raw.githubusercontent.com/MPAS-Dev/MPAS-Analysis/main/LICENSE

import numpy as np
import os
import xarray as xr

from mpas_analysis.shared import AnalysisTask
Expand Down Expand Up @@ -692,6 +693,10 @@ def _compute_area_vol(self):
if maxAllowedSeaIceThickness is not None:
mask = np.logical_and(mask,
ds.iceThick <= maxAllowedSeaIceThickness)
if os.path.exists(outFileNames[hemisphere]):
dsCache = xr.open_dataset(outFileNames[hemisphere])
timeMask = ds.startTime > dsCache.startTime.isel(Time=-1)
ds = ds.isel(Time=timeMask)

dsAreaSum = (ds.where(mask) * dsMesh.areaCell).sum('nCells')
dsAreaSum = dsAreaSum.rename(
Expand All @@ -703,21 +708,25 @@ def _compute_area_vol(self):
dsAreaSum['snowDepth'] = (dsAreaSum.snowVolume /
dsMesh.areaCell.sum('nCells'))

dsAreaSum['iceArea'].attrs['units'] = 'm$^2$'
dsAreaSum['iceArea'].attrs['description'] = \
f'Total {hemisphere} sea ice area'
dsAreaSum['iceVolume'].attrs['units'] = 'm$^3$'
dsAreaSum['iceVolume'].attrs['description'] = \
f'Total {hemisphere} sea ice volume'
dsAreaSum['snowVolume'].attrs['units'] = 'm$^3$'
dsAreaSum['snowVolume'].attrs['description'] = \
f'Total {hemisphere} snow volume'
dsAreaSum['iceThickness'].attrs['units'] = 'm'
dsAreaSum['iceThickness'].attrs['description'] = \
f'Mean {hemisphere} sea ice thickness'
dsAreaSum['snowDepth'].attrs['units'] = 'm'
dsAreaSum['snowDepth'].attrs['description'] = \
f'Mean {hemisphere} snow depth'
if os.path.exists(outFileNames[hemisphere]):
dsAreaSum = xr.concat([dsCache, dsAreaSum], dim='Time')
dsCache.close()
else:
dsAreaSum['iceArea'].attrs['units'] = 'm$^2$'
dsAreaSum['iceArea'].attrs['description'] = \
f'Total {hemisphere} sea ice area'
dsAreaSum['iceVolume'].attrs['units'] = 'm$^3$'
dsAreaSum['iceVolume'].attrs['description'] = \
f'Total {hemisphere} sea ice volume'
dsAreaSum['snowVolume'].attrs['units'] = 'm$^3$'
dsAreaSum['snowVolume'].attrs['description'] = \
f'Total {hemisphere} snow volume'
dsAreaSum['iceThickness'].attrs['units'] = 'm'
dsAreaSum['iceThickness'].attrs['description'] = \
f'Mean {hemisphere} sea ice thickness'
dsAreaSum['snowDepth'].attrs['units'] = 'm'
dsAreaSum['snowDepth'].attrs['description'] = \
f'Mean {hemisphere} snow depth'

dsTimeSeries[hemisphere] = dsAreaSum

Expand Down