[ncl-talk] ESMF regridding
Chathurika
chatu at scsio.ac.cn
Wed Mar 24 09:28:01 MDT 2021
Dear All,
Thank you so much for reading my email and helping me out to solve this issue.
I want to perform the significance test (ttest) over time dimension for the differences of two datasets which have lat[:,:] and lon[:,:] (two dimensional, like WRF).
differences = (high resolution - low resolution).
However, the dimensions of lat and lon are not same. The variable summary is;
Low resolution:
Type: float
Total Size: 54067200 bytes
13516800 values
Number of Dimensions: 3
Dimensions and sizes: [time | 240] x [j | 220] x [i | 256]
Coordinates:
time: [52975.5..60249.5]
j: [0..219]
i: [0..255]
Number Of Attributes: 11
standard_name : sea_surface_height_above_geoid
long_name : Sea Surface Height Above Geoid
comment : This is the dynamic sea level, so should have zero global area mean. It should not include inverse barometer depressions from sea ice.
units : m
original_name : zos
cell_methods : area: mean where sea time: mean
cell_measures : area: areacello
history : 2019-09-04T15:31:31Z altered by CMOR: replaced missing value flag (-9e+33) and corresponding data with standard missing value (1e+20).
missing_value : 1e+20
_FillValue : 1e+20
coordinates : latitude longitude
High resolution:
Type: float
Total Size: 311047680 bytes
77761920 values
Number of Dimensions: 3
Dimensions and sizes: [time | 240] x [j | 404] x [i | 802]
Coordinates:
time: [52975.5..60249.5]
j: [0..403]
i: [0..801]
Number Of Attributes: 11
standard_name : sea_surface_height_above_geoid
long_name : Sea Surface Height Above Geoid
comment : This is the dynamic sea level, so should have zero global area mean. It should not include inverse barometer depressions from sea ice.
units : m
original_name : zos
cell_methods : area: mean where sea time: mean
cell_measures : area: areacello
history : 2019-08-25T07:38:10Z altered by CMOR: replaced missing value flag (-9e+33) and corresponding data with standard missing value (1e+20).
missing_value : 1e+20
_FillValue : 1e+20
coordinates : latitude longitude
*latitude and longitude have two dimensions.
I cannot do ESMF regridding as per it is not allowed to use the all three dimensions (time, lat, lon). I am little confused here, How can I use ESMF regridding and keep the time dimension also. If so, after regridding, I can perform the ttest for the resolution difference.
Please help me and Many many thanks.
Best regards,
Chathu
Wickramage Chathurika Hemamali
Msc in Physical Oceanography
State Key Laboratory of Tropical Oceanography
South China Sea Institute of Oceanology
University of Chinese Academy of Science
China
Specialized in Oceanography and Marine Geology (Bachelor)
University of Ruhuna
Matara
Sri Lanka
Email : wickramagechathurika at rocketmail.com
chatu at scsio.ac.cn
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