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eca_tx90p prblem

Added by Micah Wilhelm over 12 years ago

Hi there,

The discription of eca_tx90p is a little bit confusing. It says first that "ifile2 is the 90th percentile TXn90 of daily maximum temperatures for any period used as reference." This implies that you must have already calculated the 90th percentiles separately and saved it as ifile2, and then feed it into eca_tx90p. However, it then goes on saying "TXn90 is calculated as the 90th percentile of daily maximum temperatures of a five day window centred on each calendar day of a given climate reference period." Which to me implies that the 90th percentile is calcualted within the eca_tx90p function, and therefore ifile2 is actually just a file with reference period data.

Can anyone explain which of the above is correct for the eca_tx90p operator, please?

Kind regards,
Micah


Replies (1)

RE: eca_tx90p prblem - Added by Jaison-Thomas Ambadan over 12 years ago

and therefore ifile2 is actually just a file with reference period data.

Please have a look at the following (you may have to login first):

https://code.zmaw.de/issues/2515#note-7

https://code.zmaw.de/issues/2493#note-8

If I understand the above correctly, the "ifile2", for example in the case of "eca_r90p" (for from cdo -h: "Usually ifile2 is generated by the operator ydaypctl,90"), must be calculated "separately" - which means CDO won't do it internally. I realized that my previous reply to your above post/comment was wrong (I've edited this reply now). I truly apologize for that :(

Best regards,
J.

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