{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### trouble with open_mfdataset with the NORESM1-ME model\n",
    "* ncrcat works as expected on these two files, but xr.open_mfdataset makes a mess of latitude grid\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import xarray as xr\n",
    "import numpy as np\n",
    "from matplotlib import pyplot as plt\n",
    "%matplotlib inline\n",
    "from glob import glob"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['/net/stregone/home/naomi/Raws/histPrcp85/NorESM1-ME/rcp85/atmos/mon/ts/r1i1p1/ts_Amon_NorESM1-ME_rcp85_r1i1p1_200601-204412.nc',\n",
       " '/net/stregone/home/naomi/Raws/histPrcp85/NorESM1-ME/rcp85/atmos/mon/ts/r1i1p1/ts_Amon_NorESM1-ME_rcp85_r1i1p1_204501-210012.nc']"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#scenario ='historical'\n",
    "scenario ='rcp85'\n",
    "var = 'ts'\n",
    "\n",
    "path = '/net/stregone/home/naomi/Raws/histPrcp85/NorESM1-ME/'+scenario+'/atmos/mon/'+var\n",
    "\n",
    "files = glob(path + '/r1i1p1/*.nc')\n",
    "files"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "dss = xr.open_mfdataset(files)\n",
    "ds0 = xr.open_dataset(files[0])\n",
    "ds1 = xr.open_dataset(files[1])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "((142,), (96,), (96,))"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dss.lat.shape,ds0.lat.shape,ds1.lat.shape"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "numpy.float64"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#print(':f.20'.format,dss.lat.values)\n",
    "type(dss.lat.values[0])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<xarray.DataArray 'lat' (lat: 50)>\n",
       "array([0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.,\n",
       "       0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.,\n",
       "       0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.])\n",
       "Coordinates:\n",
       "  * lat      (lat) float64 -90.0 -88.11 -86.21 -84.32 -82.42 -80.53 -78.63 ..."
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(ds0.lat - ds1.lat)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(96,)"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(dss.lat - ds1.lat).shape"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<xarray.DataArray 'ts' (time: 1140, lat: 96, lon: 144)>\n",
       "dask.array<shape=(1140, 96, 144), dtype=float32, chunksize=(468, 96, 144)>\n",
       "Coordinates:\n",
       "  * lat      (lat) float64 -90.0 -88.11 -86.21 -84.32 -82.42 -80.53 -78.63 ...\n",
       "  * lon      (lon) float64 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 ...\n",
       "  * time     (time) datetime64[ns] 2006-01-16T12:00:00 2006-02-15 ..."
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# could fix latitude problem by:\n",
    "dss.ts - 0*ds0.ts[0]"
   ]
  }
 ],
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