List of Figures:

 

Figure 1.(a), ( b) and (c ): Horizontal decoupling test in clear sky condition. This test shows the sensitivity of 2m temperature (b) and relative humidity (c) to a well known initial perturbation box of mean soil moisture content Wp (a).

Figure 2.(a), ( b) and (c ): Same as Figure 1 for a box placed near to the north-eastern side of the domain (meteorological perturbed conditions).

(a)
DWWC_to_RR_006_boxwst.gif

(a)
DWWC_to_RR_006_boxest.gif

(b)
DTWC_to_RR_006_boxwst.gif

(b)
DTWC_to_RR_006_boxest.gif

(c)
DHWC_to_RR_006_boxwst.gif

(c)
DHWC_to_RR_006_boxest.gif

Figure 3. Evaluation of the mean soil moisture perturbation strategy. K matrix for T2m (Wp correction) for given perturbations:
(a) coherent, (b ) coherent (average of 10 members), (c ) conditional, (d) chess-type (1 member) and (e) chess-type (2 members).

(a)
KTcoeff_12_1prt.gif

(b)
KTcoeff_12_10prt.gif

KTcoeff_12_1prtnomsk.gif

 (c)

(d)
KTcoeff_12_chess.gif

(e)
KTcoeff_12_ches2.gif

Figure 4. (a) Evaluation of OI coefficient for T2m (Wp correction) and (b ) equivalent 2d-var gain matrix.

 
OTcoeff_2000061612_oi_can.gif

(b)
KTcoeff_2000061612_sv_can.gif

Figure 5.: K matrix for 2000/06/16 12 UTC as result of chess-type perturbation (2 members) and Laplacian smoothing.
(a) K value for T2m (Wp correction), ( b) K value for RH2m (Wp correction).

(a)
KTcoeff_12_ch2sm.gif

(b)
KHcoeff_12_ch2sm.gif

Figure 6.: Soil Wetness Index for 2000/06/16 12 UTC ( ARPEGE/ALADIN oper.). 

SWI20000616_carp.gif