Skip to content

Read meridional heat transport lat bins from either of 2 streams #297

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
merged 1 commit into from
Jan 23, 2018
Merged

Read meridional heat transport lat bins from either of 2 streams #297

Changes from all commits
Commits
Show all changes
1 commit
Select commit
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
59 changes: 34 additions & 25 deletions mpas_analysis/ocean/meridional_heat_transport.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,6 @@

import xarray as xr
import numpy as np
import netCDF4
import os

from ..shared.plot.plotting import plot_vertical_section,\
Expand Down Expand Up @@ -91,16 +90,6 @@ def setup_and_check(self): # {{{
analysisOptionName='config_am_meridionalheattransport_enable',
raiseException=True)

# Later, we will read in depth and MHT latitude points
# from mpaso.hist.am.meridionalHeatTransport.*.nc
mhtFiles = self.historyStreams.readpath(
'meridionalHeatTransportOutput')
if len(mhtFiles) == 0:
raise IOError('No MPAS-O MHT history file found: need at least '
'one ')

self.mhtFile = mhtFiles[0]

self.sectionName = 'meridionalHeatTransport'

# Read in obs file information
Expand Down Expand Up @@ -163,27 +152,47 @@ def run_task(self): # {{{
'movingAveragePoints')

# Read in depth and MHT latitude points
# Latitude is from binBoundaryMerHeatTrans written in
# mpaso.hist.am.meridionalHeatTransport.*.nc
# Depth is from refZMid, also in
# mpaso.hist.am.meridionalHeatTransport.*.nc

self.logger.info(' Read in depth and latitude...')
ncFile = netCDF4.Dataset(self.mhtFile, mode='r')
# reference depth [m]
refZMid = ncFile.variables['refZMid'][:]
refBottomDepth = ncFile.variables['refBottomDepth'][:]
binBoundaryMerHeatTrans = \
ncFile.variables['binBoundaryMerHeatTrans'][:]
binBoundaryMerHeatTrans = np.rad2deg(binBoundaryMerHeatTrans)
ncFile.close()
# Latitude is from binBoundaryMerHeatTrans
try:
restartFileName = self.runStreams.readpath('restart')[0]
except ValueError:
raise IOError('No MPAS-O restart file found: need at least one '
'for MHT calcuation')

with xr.open_dataset(restartFileName) as dsRestart:
refBottomDepth = dsRestart.refBottomDepth.values

nVertLevels = len(refBottomDepth)
refLayerThickness = np.zeros(nVertLevels)
refLayerThickness[0] = refBottomDepth[0]
refLayerThickness[1:nVertLevels] = (refBottomDepth[1:nVertLevels] -
refBottomDepth[0:nVertLevels-1])

refZMid = -refBottomDepth + 0.5*refLayerThickness

binBoundaryMerHeatTrans = None
# first try timeSeriesStatsMonthly for bin boundaries, then try
# meridionalHeatTranspor steram as a backup option
for streamName in ['timeSeriesStatsMonthlyOutput',
'meridionalHeatTransportOutput']:
try:
inputFile = self.historyStreams.readpath(streamName)[0]
except ValueError:
raise IOError('At least one file from stream {} is needed to '
'compute MHT'.format(streamName))

with xr.open_dataset(inputFile) as ds:
if 'binBoundaryMerHeatTrans' in ds.data_vars:
binBoundaryMerHeatTrans = ds.binBoundaryMerHeatTrans.values
break

if binBoundaryMerHeatTrans is None:
raise ValueError('Could not find binBoundaryMerHeatTrans in either'
'timeSeriesStatsMonthlyOutput or '
'meridionalHeatTransportOutput streams')

binBoundaryMerHeatTrans = np.rad2deg(binBoundaryMerHeatTrans)

######################################################################
# Mark P Note: Currently only supports global MHT.
# Need to add variables merHeatTransLatRegion and
Expand Down