(a)(b) (c)(d) FIG. 1. Climatological precipitation (color, mm day -1 ) and SST (contour interval is 2 o C with 10 o C and 20 o C thickened) in June (left)

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Presentation transcript:

(a)(b) (c)(d) FIG. 1. Climatological precipitation (color, mm day -1 ) and SST (contour interval is 2 o C with 10 o C and 20 o C thickened) in June (left) and July (right): (a) (b) JRA25, (c) (d) JRA25 without precipitation associated with tropical cyclones and (e) (f) AFES. (e)(f)

(a) (b) FIG. 2. Daily climatology of precipitation (color, mm day -1 ) and SST (contour interval is 2 o C with 10 o C and 20 o C thickened) averaged between 140 o E and 170 o E with 5-day running mean of (a) JRA25 and (b) AFES from 1 May to 30 Sep.

(a)(b) (c)(d) (e)(f) FIG. 3. As in Fig. 2 but for (a) (b) vertical pressure velocity with negative sign (10 -2 Pa s -1 ), (c) (d) horizontal temperature advection (10 -6 K s -1 ) and (e) (f) zonal wind (m s -1 ) at 500 hPa: (left) JRA25 and (right) AFES.

(a)(b) (c)(d) FIG day mean of precipitation (shaded, mm day -1 ) and SLP (contour interval is 2 hPa with 1000 hPa, 1010 hPa and 1020 hPa thickened) between (left) 21 June and 30 June, (right) 21 July and 30 July: (a) (b) JRA25 and (c) (d) AFES.

(a)(b) (c)(d) FIG. 5. As in Fig. 4 but for temperature (color, o C) and zonal wind (contour interval is 2.5 m s -1 with 0, 10, and 20 m s -1 thickened) at 500 hPa.

(a)(b) (c)(d) FIG. 6. As in Fig. 4 but for horizontal temperature advection (color, K s -1 ) and vertical p- velocity with negative sign (contour interval is 2.5 x Pa s -1 with 0 and 10 x Pa s -1 thickened) at 500 hPa.

(a)(b) (c)(d) FIG. 7. As in Fig. 2, but for (left) vertical integrated moisture convergence from surface to 250 hPa (color, mm day -1 ) and precipitation (contours are drawn for the range over 3 mm day -1 at every 1 mm day -1 with 5 mm day -1 and 10 mm day -1 thickened), (right) surface evaporation (color, mm day -1 ), SST (black contour, contour interval is 2 o C with 10 o C and 20 o C thickened) surface wind (vector, m s -1 ) and precipitation (white contours for the range over 3 mm day -1 at every 1 mm day -1 with 5 and 10 mm day -1 thickened): (a) (b) JRA25 and (c) (d) AFES.

(a)(b) (c)(d) FIG. 8. As in Fig 4, but for surface evaporation (color, mm day-1), SST (black contour, contour interval is 2 o C with 10 o C and 20 o C thickened), moisture flux at 925 hPa (vector over 20 kg kg -1 m s - 1 ) and vertically integrated moisture convergence (3, 5, 7, and 9 mm day -1 are plotted with blue contours).

(a) (b) FIG. 9. (left) Daily appearance frequency of 500 hPa horizontal temperature advection maximum (detail definition is described in text) between 1 June and 31 July (color, 20 yr -1 ) and (right) its cumulated frequency in June and July. (a) JRA25 (b) AFES.

(a)(b)(c) (d)(e)(f) FIG. 10. Moisture budget analysis averaged between 140 o E and 170 o E for (a-c) JRA25 and (d-f) AFES. (a) (d) Composites when horizontal temperature advection maximum at 500 hPa is located between 40 o N and 50 o N (N), (b) (e) between 30 o N and 40 o N (S) and (c) (f) difference between S and N. Precipitation (mm day -1, solid line), vertical integrated horizontal moisture convergence (mm day -1, broken line), surface evaporation (mm day -1, dotted line) and SST ( o C, dotted – broken line, right axis).

FIG. 11. Seasonal evolution of Baiu rainband in CFES. (a) precipitation (color, mm day -1 ) and SST (contour interval is 2 o C with 10 o C and 20 o C thickened) averaged between 140 o E and 170 o E with 5- day running mean from 1 May to 30 Sep, (b) horizontal temperature advection at 500 hPa (10 -6 K s -1 ), (c) vertical integrated moisture convergence from surface to 250 hPa (color, mm day -1 ) and precipitation (contours are drawn for the range over 3 mm day -1 at every 1 mm day -1 with 5 mm day -1 and 10 mm day -1 thickened) and (d) surface evaporation (color, mm day -1 ), SST (black contour, contour interval is 2 o C with 10 o C and 20 o C thickened) surface wind (vector, m s -1 ) and precipitation (white contours for the range over 3 mm day -1 at every 1 mm day -1 with 5 and 10 mm day -1 thickened). (a)(b) (c)(d)

Large surface evaporation Warm SST Cold SST Small surface evaporation (b) (a) 500 hPa Warm advection Before Baiu termination After Baiu termination 500 hPa Warm advection FIG. 12. A revised conceptual model of Baiu: (a) before Baiu termination and (b) after Baiu termination.