Opened 4 years ago

Closed 3 years ago

#1846 closed Bug (fixed)

diaptr land suppression eORCA12

Reported by: mathiot Owned by: rbourdal
Priority: low Milestone:
Component: OCE Version: release-3.6
Severity: Keywords:
Cc: rbourdal

Description (last modified by nemo)

Context

Diaptr with land suppression is not working well. Whatever the variables and the bassins, data are missing in some place because there is no processor at these locations (Antarctica and at the latitude of Bering strait) (see attachment).


Analysis

The line use to plot diaptr is defined in iom_init.F90:

CALL dom_ngb( 180., 90., ix, iy, 'T' ) !  i-line that passes near the North Pole : Reference latitude (used in plots)

In my eORCA12 decomposition, some processors are missing along this line (land processor).

It could affect any configuration using land suppression (more likely at high resolution) in NEMO_3.6_STABLE and in the trunk.

Fix

I suggest to move the test on point (180E,90N) to (-168.7E,65.6N). The suggested point, is a point in Bering Strait. The only land points cross along this line are the points over Antarctica. The issue with this is that the latitude vector range will be [-86.5:~80N (not 90N)] instead of [-86.6N:90N]. However, the latitude vector is not correct anyway in the Arctic (because or the grid distortion). So I think the latitude coordinate issue is minor.

Commit History (3)

ChangesetAuthorTimeChangeLog
8573cbricaud2017-09-28T10:31:26+02:00

Fix Ticket #1846 in trunk

8572cbricaud2017-09-28T10:27:06+02:00

Fix Ticket #1846 in NEMO_3.6_STABLE

8571cbricaud2017-09-28T10:14:57+02:00

Fix Ticket #1846 in NEMO_3.6_STABLE

Attachments (2)

diaptr_missing_data.png (49.1 KB) - added by mathiot 4 years ago.
diff_nbland_point.png (124.2 KB) - added by rbourdal 3 years ago.

Download all attachments as: .zip

Change History (6)

Changed 4 years ago by mathiot

comment:1 Changed 4 years ago by nemo

  • Description modified (diff)

comment:2 Changed 3 years ago by clevy

  • Owner changed from nemo to rbourdal

comment:3 Changed 3 years ago by clevy

  • Cc rbourdal added
  • Status changed from new to assigned

Changed 3 years ago by rbourdal

comment:4 Changed 3 years ago by rbourdal

  • Resolution set to fixed
  • Status changed from assigned to closed

swich reference point (and line) as suggested by P. Mathiot.
New reference line passes through Bering Strait (black line on the plot)

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