Test GSI radiance assimilation with CRTM2.4.0

[emilyhcliu]

No description provided.

[ScottSieron-NOAA]

A v16.x parallel experiment with resetting the bias correction coefficients of all satellite sensors to 0, and using CRTM v2.4.0, has been ongoing and near completion. Compared to the original experiment, results are distinctly different and mixed in improvement/degradation, though perhaps more improvement.

[emilyhcliu]

@ScottSieron-NOAA Great! Thanks. Could you also post the BIAS plot?

[ScottSieron-NOAA]

The CRTM 2.4.0 experiment also has overall reduced biases, especially in temperature.

[emilyhcliu]

@ScottSieron-NOAA Thanks. The result in terms of BIAS looks great!!

[BenjaminTJohnson]

I agree, this looks really good. If there are any additional results from your assessments that you can share with me, I would appreciate it.

[ScottSieron-NOAA]

The experiment with resetting the bias correction coefficients of all satellite sensors to 0, and using CRTM v2.4.0 (TaTb4b_240) was stopped on October 2. Fit-to-obs show neutral to positive results in Z (pictured), W, Q and T.

In TaTb4b_240, the GFDL cloud fraction was calculated and input into the CRTM. Especially without the inclusion of precipitation in this experiment, these cloud fractions are generally small. We have begun a new experiment in which CRTM 240 is used, but all clouds with water content greater than zero have the cloud fractions set to one.

[BenjaminTJohnson]

Is there any plan to look over land as well?



[ScottSieron-NOAA]

An experiment was run in which CRTM 240 is used, but all clouds with water content greater than zero have the cloud fractions set to one. Results as shown by the sanity check plots are similar to using the calculated cloud fractions. The experiment was shortened to just a few days.

[ScottSieron-NOAA]

We await results from experiments which built-upon these methods to implement this into v16.x.

[BenjaminTJohnson]

@ScottSieron-NOAA thanks. is CRTM v2.4.0 being added to the HPC stacks yet?