issue_comments: 208088579

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https://github.com/pydata/xarray/issues/822#issuecomment-208088579 https://api.github.com/repos/pydata/xarray/issues/822 208088579 MDEyOklzc3VlQ29tbWVudDIwODA4ODU3OQ== 1217238 2016-04-10T23:14:50Z 2016-04-10T23:14:50Z MEMBER

I just opened this up with decode_cf=False. Here's what the raw data looks like:

ds.analysed_sst[0].plot.imshow()

with attributes:

Attributes: _FillValue: -32768 units: kelvin scale_factor: 0.01 add_offset: 273.15 long_name: analysed sea surface temperature valid_min: -300 valid_max: 4500 standard_name: sea_water_temperature depth: 20 cm source: ATSR<1,2>-ESACCI-L3U-v1.0, AATSR-ESACCI-L3U-v1.0, AVHRR<12,14,15,16,17,18>_G-ESACCI-L2P-v1.0, AVHRRMTA-ESACCI-L2P-v1.0 comment: SST analysis produced for ESA SST CCI project using the OSTIA system in reanalysis mode.

To me, It looks like somebody just mis-prepared this dataset, given the smooth transitions in the ocean from dark red to dark blue, which would correspond to numeric overflow. If not, there are lots of places in the ocean where the temperature is in negative degrees Kelvin.

I don't have a strong opinion on whether or not we should automatically masking values outside valid_min/valid_max.

 
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