Environmental Engineering Reference
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had a pronounced diurnal cycle, and were as large as 10°C in the afternoon of
August 1. Satellite pictures reveal isolated, thin clouds did drift across the
California Central Valley during the day but this is an unlikely source for so
large a cold bias. None of the model runs produced significant cloudiness. That
this issue did not occur with other physics combinations points to a likely bug
in the WRF model.
Question: Does the WRF run that works (i.e., agrees with the observations) do so
for the right reason?
Answer: Indeed, as theme of my talk was a critical assessment of model perfor-
mance, I myself raised the question of whether the ostensibly correct forecasts
were right for the right reason, so that's an ongoing concern shared by the
questioner and myself.
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