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Add options to inflate the ensemble while recentering #1501

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Add options to inflate the ensemble while recentering #1501

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Add options to inflate the ensemble while recentering
Feb 14, 2025
6b0fd0a
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Feb 14, 2025
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16 changes: 16 additions & 0 deletions utils/soca/gdas_ens_handler.h
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Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,22 @@ namespace gdasapp {
// Set variables to zero if specified in the configuration
postProcIncr.setToZero(incr);

// Optionally apply inflation
if (fullConfig.has("ensemble inflation.value")) {
const double inflation = fullConfig.getDouble("ensemble inflation.value");
mom6_incr *= inflation;
oops::Log::info() << "incr after scalar inflation " << i << ":"
<< mom6_incr << std::endl;
}
if (fullConfig.has("ensemble inflation.field")) {
soca::Increment weight(geomOut, mom6_incr.variables(), mom6_incr.validTime());
const eckit::LocalConfiguration weightConf(fullConfig, "ensemble inflation.field");
weight.read(weightConf);
mom6_incr.schur_product_with(weight);
oops::Log::info() << "incr after field inflation " << i << ":"
<< mom6_incr << std::endl;
}

// Save the increments used to initialize the ensemble forecast
result = postProcIncr.save(mom6_incr, i+1);

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