Current Status and Future Plans for KMA Data Assimilation System Dec, 2016 Current Status and Future Plans for KMA Data Assimilation System Dec, 2016 Hyun-Cheol Shin, Eun Joo Lee, Eun Hee Lee, Jung-Rim Lee, Eun-Hee Kim, Hyeyoung Kim, Heejung Kang, Adam Clayton*, Sangwon Joo Korea Meteorological Administration, UKMO *
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Current Status and Future Plans for KMA Data Assimilation System
Dec, 2016
Current Status and Future Plans for KMA Data Assimilation System
Same fixed grid area / Variable grid area extendedNew Dynamics (Vn 8.2) � End Game(Vn 10.1 )
Number of used observations
Surface : 2696 � 5160 : 1.9 times increase Sonde : 50 � 101 : 2 times increaseAircraft : 238 � 2407 : 10 times increase Scatwind : 155 � 580 : 3.8 times increase
LDPS XLDPS LDPS XLDPS
Analysis Verification (RMSE, 2015.7)
MSLP – 925 hPa height : LDPS better than XLDPS 500 hPa Z improved 850hPa – 100 hPa height : XLDPS better than LDPS
Temperature & Wind : improved for all cases
Precipitation verification
3 hourly accumulated precipitation
Generally improved
Observation verification
Analysis verification, precipitation verification : XLDPS better than LDPSObservation verification : LDPS better than XLDPS (except RH)Summer case showed better performance than winter case
VLDPS XLDPS
Resolution 1.5km 1.5km
Levels 70 layers 70 layers
Cycle Interval 1 hourly 3 hourly
DA 3DVAR 3DVAR
Visibilityassimilation
Yes No
4DVAR Plan 2017 2018
Operational use 2016.12 2016.6
Forecast hours 12 hours 36 hours
Others ICE-POP -
Future plan VLDPS
VLDPS : Very Short Range forecast model
4km Regional Model4km Regional Model
� Resolution : 12km � 4km� UM version : New Dynamics � EndGame
� DA Versions improved
Future plan 4km Model
0
2
4
6
8
10
12
14
6 12 18 24 30 36
RM
SE
Forecast time(hour)
GPH_500hPa
RDPS12
RDPS4_DA
0
1
2
3
4
5
6
7
8
6 12 18 24 30 36
RM
SE
Forecast time(hour)
WIND_250hPa
RDPS12
RDPS4_DA
Initial version of 4km regional model gave improved resultsStrategic decision among 4km regional model, XLDPS and VLDPS
KIAPS Project(Korea Institute of Atmospheric Prediction Systems)KIAPS Project(Korea Institute of Atmospheric Prediction Systems)