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These parameters refer to temperature anomalies at 850hPa. They are available from T+12h to T+360h at 12-hour step. For the computation of anomalies and standard deviation, a climatology derived from ECMWF's re-forecasts is used consisting of the closest single re-forecast run (11 members, 20 years back) preceding the real-time forecast date. The same climatology replaced the outdated fixed climatology for the following existing parameters:
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