给定两个nc文件here:
data/CMIP6_UKESM1-0-LL_Lmon_piControl_r1i1p1f2_gpp_1960-3059.nc
data/CMIP6_UKESM1-0-LL_Amon_piControl_r1i1p1f2_tas_1960-3059.nc
读取第一个文件:
from netCDF4 import Dataset
import numpy as np
ds1 = Dataset('data/CMIP6_UKESM1-0-LL_Lmon_piControl_r1i1p1f2_gpp_1960-3059.nc')
print(ds1.variables.keys()) # get all variable names
输出:
odict_keys(['gpp', 'time', 'time_bnds', 'lat', 'lat_bnds', 'lon', 'lon_bnds', 'clim_season', 'season_year'])
读取第二个文件:
ds2 = Dataset('data/CMIP6_UKESM1-0-LL_Amon_piControl_r1i1p1f2_tas_1960-3059.nc')
print(ds2.variables.keys())
输出:
odict_keys(['tas', 'time', 'time_bnds', 'lat', 'lat_bnds', 'lon', 'lon_bnds', 'clim_season', 'height', 'season_year'])
检查gpp
变量:
gpp = ds1.variables['gpp'] # gpp variable
print(gpp)
输出:
<class 'netCDF4._netCDF4.Variable'>
float32 gpp(time, lat, lon)
_FillValue: 1e+20
standard_name: gross_primary_productivity_of_biomass_expressed_as_carbon
long_name: Carbon Mass Flux out of Atmosphere Due to Gross Primary Production on Land [kgC m-2 s-1]
units: kg m-2 s-1
cell_methods: area: mean where land time: mean
coordinates: clim_season season_year
unlimited dimensions:
current shape = (3300, 144, 192)
filling on
检查tas
变量:
tas = ds2.variables['tas'] # tas variable
print(tas)
输出:
<class 'netCDF4._netCDF4.Variable'>
float32 tas(time, lat, lon)
_FillValue: 1e+20
standard_name: air_temperature
long_name: Near-Surface Air Temperature
units: K
cell_methods: area: time: mean
coordinates: clim_season height season_year
unlimited dimensions:
current shape = (3300, 144, 192)
filling on
现在,我想计算gpp
和tas
之间的相关性,然后将它们的相关值绘制在Map上。
我怎么能这么做?谢谢。
1条答案
按热度按时间3z6pesqy1#
使用我的包nctoolkit(https://nctoolkit.readthedocs.io/en/latest/),您应该能够轻松地完成此操作。
我的理解是,您希望绘制每个网格单元的时间相关系数。在这种情况下:
如果需要每个时间步长变量之间的空间相关系数,可以使用以下行代替倒数第二行: