Opened 3 years ago

Closed 3 years ago

#1940 closed Bug (fixed)

Problem with particles in PISCES

Reported by: aumont Owned by: oaumont
Priority: low Milestone:
Component: TOP Version: release-3.6
Severity: Keywords: PISCES
Cc:

Description

Context


PISCES, when run in high resolution configurations, produce excessive particulate materials at the bottom of the ocean in relatively isolated areas. These concentrations keep on increasing until eventually the model explodes. This occurs after long integration durations.

Analysis


This problem occurs when NO3 and O2 fall to 0. In that case, either DOC increases strongly and/or any remineralization of materials produce strongly negative concentrations which stop all sources and sinks in PISCES, except for sedimentation. As a consequence, particles continue to sink to the bottom of the ocean where they accumulate without being either remineralized or advected away (stagnant grid points).

Fix


Higher order reactions of organic matter degradation have to be considered in an implicit way. When NO3 and O2 fall to zero, remineralisation is still occuring based on non-modeled chemical species. This means that remineralisation is performed with no consumption of any modeled tracers.

Commit History (3)

ChangesetAuthorTimeChangeLog
8541cetlod2017-09-19T12:04:09+02:00

trunk: minor correction to avoid compilation error related to ticket #1940

8533cetlod2017-09-18T16:48:09+02:00

trunk: bugfixes to solve problem particle in PISCES, see ticket #1940

8532cetlod2017-09-18T14:58:22+02:00

v3.6 stable: bugfixes to solve problem particle in PISCES, see ticket #1940

Change History (1)

comment:1 Changed 3 years ago by cetlod

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

Done in3.6 stable & trunk

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