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NCAR / DART

Data Assimilation Research Testbed
https://dart.ucar.edu/
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QUESTION: multiple observation assimilation, the states are updated by unrelated observation #648

Closed hgrhgy closed 4 months ago

hgrhgy commented 4 months ago

Describe the bug, MAYBE not a bug

when I tried to assimlate multiple observation (e.g. XCO2 XCO and XCH4 observation) , I suppose the CO2 observation is only affected the states related to the CO2. Since the states of XCO2 XCO and XCH4 are perturbed and the variance of these states is not zero, the CO2 observation will updated all the perturbed states. It seems to be a one(obs)-to-many(states) mapping.

Is there any way to specify which states are related to a certain observation?

Version of DART

DART version 11.0.1

Have you modified the DART code?

No code modifed under dir assimilation_code porting new model of geoschem

Build information

Please describe:

  1. running on my local cluster
  2. intel compiler
hkershaw-brown commented 4 months ago

Hi Hgrhgy,

Please email us at dart@ucar.edu for support questions.

Cheer, Helen