(This post is a follow-up of my previous one http://toyoda-eizi.blogspot.jp/2015/03/wmo-op-news-germany-seemingly.html )
I’ve spent a bit more time comparing 2004 and 2015 versions of Germany’s letter regarding designation of their “additional data” with respect to Resolution 40 (Cg-XII).
1. SYNOP – little changed
The key change between 2004 and 2015 is addition of BUFR version of surface station observation. I’m not surprised that several stations appeared and disappeared during the decade, since we have seen many notifications of that kind.
2. CLIMAT – no additional bulletins anymore
The 2004 version included several additional CLIMAT reports: CSDL45-48 EDZW, which is no longer disseminated from Offenbach. Some of the stations in the report are available in other headings now.
3. GRIB – resolution changed; surface and 700 hPa are essential until 72 h forecast
The key change is increased horizontal resolution from 1.5 degree to 0.25 degree, as I mentioned before. Also it is notable that the data on the surface and 700 hPa level are declared essential upto 72 hour forecast.
(1) 2004 version – 1.5 degree resolution
a. Essential up to 72 h, and Additional up to 168 h
- Sea level (89): pressure (P)
- 850 & 500 hPa: geopotential height (H), temperature (T), U and V winds
- 300 hPa: H, U, V
- 700 hPa: relative humidity (R)
b. Additonal for analysis and all forecast times
- Surface(98): T, U, V, precipitation (E, no analysis)
- Land surface(88): T
- 850 hPa: R, equivalent potential temperature (Q)
- 700 hPa: H, T, U, V, vertical velocity (O)
- 500 hPa: R, O
- 300 hPa: T
- 250, 200, 100, 50 hPa: H, T, U, V
- Entire atmosphere(00): stability KX index (X)
(2) 2015 version – 0.25 degree resolution
a. Essential up to 72 h, and Additional up to 168 h
- Sea level: P
- Surface: T, U, V, E, cloudiness (B)
- 850, 700, 500, 300 hPa: H, T, U, V
- 700 hPa: R
b. Additonal for analysis and all forecast times
- 600, 400, 250, 200, 100, 50 hPa: H, T, U, V
- 850 hPa: R, Q
- 700 hPa: O
- 500 hPa: R, O
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