我有一个关于海洋温度的NetCDF文件。它具有1个变量（“温度”）和4个维度（时间，经度，纬度和深度）。我只想提取每个时间，经度和纬度的最大深度的温度，以获得底海温度栅格砖。我愿意使用R或在终端中使用Climate Data Operators。
NetCDF文件的属性
nc_open('data.pre1980.nc')
File data.pre1980.nc (NC_FORMAT_CLASSIC):
1 variables (excluding dimension variables):
float temp[lon,lat,depth,time]
standard_name: sea_water_temperature
long_name: TEMPERATURE
units: Celsius_scale
_FillValue: -9.98999971057742e+33
missing_value: -9.98999971057742e+33
pointwidth: 1
4 dimensions:
time Size:324 *** is unlimited ***
standard_name: time
units: months since 1960-01-01
calendar: 360_day
axis: T
lon Size:440
standard_name: longitude
long_name: longitude
units: degree_east
axis: X
lat Size:179
standard_name: latitude
long_name: latitude
units: degree_north
axis: Y
depth Size:40
units: meters
axis: Z
gridtype: 0
4 global attributes:
CDI: Climate Data Interface version 1.9.6 (http://mpimet.mpg.de/cdi)
Conventions: CF-1.6
history: Fri Aug 16 13:33:42 2019: cdo merge data.nc data.nc.1 data.nc.2 data.nc.3 data.nc.4 data.nc.5 data.pre1980.nc
CDO: Climate Data Operators version 1.9.6 (http://mpimet.mpg.de/cdo)
谢谢！