Hi,
The EOF applied to SST in this notebook seems to have its correlation signs inverted (https://github.com/pangeo-data/pangeo-ocean-examples/blob/master/noaa_ersst_variability.ipynb)
While sst_anom_detrented is plotting reasonable anomalies (this corresponds to the Mega-El Niño of 97-98):
and while ONI indexes are quite reasonable too:
The EOF's leading mode is not behaving like the aforementioned, plotting a sign-inverted canonical El Niño mode
PC1 is also sign-inverted. The last two are not consistent with Eof's function developer example (https://ajdawson.github.io/eofs/latest/examples/elnino_standard.html)
Perhaps it could be related to the weighting? I can not figure out why Eof function is not plotting EOF and its PC the way it should be.
Hi,
The EOF applied to SST in this notebook seems to have its correlation signs inverted (https://github.com/pangeo-data/pangeo-ocean-examples/blob/master/noaa_ersst_variability.ipynb)
While sst_anom_detrented is plotting reasonable anomalies (this corresponds to the Mega-El Niño of 97-98):
and while ONI indexes are quite reasonable too:
The EOF's leading mode is not behaving like the aforementioned, plotting a sign-inverted canonical El Niño mode
PC1 is also sign-inverted. The last two are not consistent with Eof's function developer example (https://ajdawson.github.io/eofs/latest/examples/elnino_standard.html)
Perhaps it could be related to the weighting? I can not figure out why Eof function is not plotting EOF and its PC the way it should be.