Opened 16 months ago

Last modified 15 months ago

#358 new

Glitch in monthly mean diagnostics

Reported by: Martin Dix Owned by:
Priority: major Component: ACCESS-CM2
Keywords: Cc:

Description (last modified by Martin Dix)

Arnold noticed an odd pattern in the standard deviation of mslp in Roger's u-as986 AMIP run.

It looks like this is due to a glitch in the monthly mean diagnostics on one processor.

We need to be sure our QC procedures can catch this.

Attachments (4)

as896.psl.std.dev.gif (33.8 KB) - added by Martin Dix 16 months ago.
ts_series.png (65.2 KB) - added by Martin Dix 16 months ago.
ts_map.png (60.4 KB) - added by Martin Dix 16 months ago.
ts_map_daily.png (69.5 KB) - added by Martin Dix 16 months ago.

Download all attachments as: .zip

Change History (7)

Changed 16 months ago by Martin Dix

Attachment: as896.psl.std.dev.gif added

Changed 16 months ago by Martin Dix

Attachment: ts_series.png added

Changed 16 months ago by Martin Dix

Attachment: ts_map.png added

Changed 16 months ago by Martin Dix

Attachment: ts_map_daily.png added

comment:1 Changed 16 months ago by Martin Dix

Arnold's original map of SD of mslp

Time series of monthly mean surface temperature from a point in the problem region shows the problem occurs in a single month.

Map of monthly mean surface temperature for April 1981. This region is of the right size to be a single processor.

Map of monthly mean surface temperature for April 1981, calculated from the daily means

All fields in the Apr 1981 monthly mean file show the problem. Values in the region are ~ 1/15 less than the surrounding region, suggesting that the monthly mean calculation on one processor has somehow dropped two days from the month.

comment:2 Changed 16 months ago by Martin Dix

Description: modified (diff)

comment:3 Changed 15 months ago by Martin Dix

In u-av842, the monthly mean file for one month was incomplete aand only about 1/3 the size it should have been. Other files for the month were ok.

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