Use of Meso-network data in Regional GSI system

Seung-Jae Lee

Questions and comments at seung-jae.lee@noaa.gov (ext. 7517)


Experimental Design | Observation Innovation | Analysis, Guess, and Increment | Bias Correction

* The following figures are for analysis time 2005 02 04 06 UTC (western USA) only.

1. Data frequency of sfc temperature by sfc pressure difference 

In the below figures, notice that
dp = n means the interval of n <= dp < n+1 (n = -30, -29, ..., -1, 0, 1, ..., 29).
For example, dp = -1 and dp = 0 correspond to the interval [-1,0] and [0,1], respectively.
Also,
dp < 0 means obs sfc pressure > guess sfc pressure (obs sfc is below model sfc) and
dp > 0 means obs sfc pressure < guess sfc pressure (obs sfc is above model sfc).




2. Mean (o-g) of sfc temperature by sfc pressure difference 

obs report type     :MESONET  METAR  land_SYNOP  marine
60 intervals counts :  14692   1254    180     72
+dp counts          :   7304    448     89     52
-dp counts          :   7397    806     91     20
+dp & -dp counts    :  14701   1254    180     72
+dp o-g average     :  -4.43  -4.11  -3.04  -2.23
-dp o-g average     :  -5.03  -6.09  -3.47  -2.24