Dear authors,

your paper is almost ready for publication. However, I would like you to make a few changes before I accept the manuscript.

1) Sometimes you use the word "verification" or indeed "model verification". This is a strong word and often misused as it implies that somebody knows the truth. In relation to models it is patently inappropriate since a model is only a more or less useful tool to SIMULATE nature. Thus, please check your use of "verification" and change to other expressions where you feel that the truth is not actually known. "Model verification" must be changed to something more appropriate.

2) P 6, L 13: instead of "improves a .. bias" please write "reduces ... bias" and check whether your "low" wind speed bias isn't rather a negative wind speed bias.

3) P 9, L 5: please write "smaller overall bias" instead of "better overall bias".

4) P 12, L 7-8: "positive improvements" -> "improvements"

5) P 12, L 15: "Negative impacts to the improvement", please reword!

6), P 13, L 7: Delete "In truth" and simply start the sentence with "This figure" or replace "In truth" with "However".

7) P 15, L 20: "improvements ... were much smaller...", much smaller than what? I assume you mean much smaller than at 80 m. In this case, can you explain or do you have a conjecture why the improvements are smaller at other altitudes than at 80 m? What is peculiar with just 80 m?

8) P 15, L 26: spell out CONUS.