-
Abstract:
With the advances of numerical weather simulation and reduced data assimilation updating cycle, surface observation data assimilation becomes more and more important in data assimilation systems. It is widely accepted that a better data assimilation system should contain the restriction of thermodynamic processes in the surface layer. Therefore, in this paper, a new surface wind observation operator is utilized in Global and Regional Assimilation PrEdiction System_3D-Variance (GRAPES_3D-Var), with the restriction of thermodynamic process in the planetary boundary layer (PBL). In order to research the ability of this new surface wind observation operator in assimilation and forecasting, a series of experiments are operated by using the GRAPES model. The main results indicate that this new method of surface wind observation operator has positive impact on the forecast with the GRAPES model.
-
References
|
[1]
|
HESSLER G. Experiments with statistical objectiveanalysis techniques for representing a coastal surfacetemperature field [J]. Bound Layer Meteor., 1984, 28:375-389. |
|
[2]
|
SEAMAN R S, HUTCHINSON M F. Comparative realdata tests of some objective analysis methods by withholdingobservations [J]. Aust. Meteor. Mag., 1985, 33(1): 37-46. |
|
[3]
|
ANDERSSON E, GUSTAFSSON N, MUELLER L, et al.Development of meso-scale analysis schemes for nowcastingand very short-range forecasting [J]. SMHI promis-Rapporter,1986, (1): 33. |
|
[4]
|
MILLER P A, BENJAMIN S G. A scheme for analyzingsurface observation over heterogeneous terrain. Preprints [J].Amer. Meteor. Soc., 1988: 178-184. |
|
[5]
|
RUGGIERO F H, SASHEGYI K D, MADALA R V, et al.The use of surface observations in four-dimensional dataassimilation using a mesoscale model [J]. Mon. Wea. Rev.,1996, 124(5): 1018-1033. |
|
[6]
|
BRATSCTH A M. Statistical interpolation by means ofsuccessive corrections [J]. Tellus, 1986, 38A: 439-447. |
|
[7]
|
RUGGIERO F H, MODICA G D, LIPTON A E.Assimilation of satellite imagery data and surface observationsto improve analysis of circulations forced by cloud shadingcontrasts [J]. Mon. Wea. Rev., 2000, 128(2): 434-448. |
|
[8]
|
GUO Y R. Application of the MM5 3DVAR System for aHeavy Rain Case over the Korean Peninsula [C]. PapersPresented at the Twelfth PSU/NCAR Mesoscale Model Users'Workshop NCAR, June 24 - 25, 2002. |
|
[9]
|
HONG Song-You, PAN Hua-Lu. Nonlocal Boundary LayerVertical Diffusion in a Medium-Range Forecast Model [J].Mon. Wea. Rev., 1996, 124 (10): 2322-2339. |
|
[10]
|
ROLAND B S. An Introduction to Boundary LayerMeteorology [M]. Dluwer academic publishers, 1988,156-194. |
|
[11]
|
ECMWF. IFS DOCUMENTATION CY28R1 PartⅡ: DataAssimilation [R]. ECMWF Technical Manual, 2004. |
-
-
-
粤公网安备 4401069904700002号
DownLoad: