The Numerical Predicition Division (NPD) of Japan Meteorological Agency (JMA) has been working on TDCF migration of both surface and upper-air reports.
- Monitoring results at Tokyo
- TDCF utilization in NWP (see below)
Surface
Use in NWP
- Assimilation of BUFR SYNOP reports was started on 16 October 2013.
- Currently coordinates (latitude, longitude, and elevation) in BUFR is ignored and replaced by coordinates from Volume A, WMO Pub. 9.
- Current implementation picks BUFR if TAC for the same station is absent; the weight of BUFRs is little now but will grow when TAC reports are stopped
- Figure below is the number of stations reporting Any SYNOP (black), Only TAC (red), TAC and BUFR (purple), and Only BUFR (blue), observed at NWP system in JMA. The number of BUFR (purple + blue) firstly exceeds 50 % of entire SYNOP reports in mid-October 2014. But there are still 40+% of stations which does not (probably cannot) send BUFR.
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description of algorithm to tell code form and parts
Use in NWP
- BUFR TEMP in U.S. was once used in assimilation from April 25 2013
- But it was stopped February 2014 (migration back to TAC)
- Starting the end of October 2014, the system uses BUFR if TAC is missing for the station/ship
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- When the geopotential height of 700 hPa goes below 2500 2400 m, it is reported 1000 m higher than actual.
When there are significant levels below or equal to 1000 hPa level (i.e. pressure >= 1000), the pressure is reported 1000 hPa less than actual.This problem was fixed effective 2015-08-18T12Z.When the geopotential height of 1000 hPa goes below MSL, the reported value is same to coded digits in TAC TEMP (512 means 12 m). This problem was fixed effective 2014-02-24T12Z.
The issues are "missing top digit of data", lost in TAC encoding.