SOLA, 2012, Vol. 8, 045-048, doi:10.2151/sola.2012-012
EASE grid = 145 * 145 grids on polar stereographic projection (125 km interval)
Short-living cyclones ( < 2 day) are omitted

Lat/lon SLP data were interpolated on the Equal Area Scalabel Earth (EASE) grid.
"ftp://ftp.cdc.noaa.gov/Datasets.other/map/storm/" made by M. C. Serreze
Brown line: topography (2000 m)

Search range: 4grid; pdiff = 0.5(a) Nov: track freq. (shade) & SST (gray line)

50˚N50˚NH0.8HH10.80.
8(b) Nov: Eady growth rate (blue); SST (gray), |∇(SST)| (shade)H

0.80.82840˚N290K2880.

1.00K40˚N

0.80.8H284 K

H0.84K288K280

0.60.
8

H2296 K

296

0.4
30˚N

K0.8

292 K

K

0.8

EASE grid = 145 * 145 grids on polar stereographic projection (125 km interval)
Short-living cyclones ( < 2 day) are omitted

Lat/lon SLP data were interpolated on the Equal Area Scalabel Earth (EASE) grid.
"ftp://ftp.cdc.noaa.gov/Datasets.other/map/storm/" made by M. C. Serreze
Brown line: topography (2000 m)

29280.

288 K

30˚N0.21300 K

300 K

Search range: 4grid; pdiff = 0.5120˚E(d) Dec: Eady growth rate (blue); SST (gray), |∇(SST)| (shade)2012 Apr
16:01:31 /home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/growth_rate/Asia_EGR_SST_clim_suppl.gmt
M.24HAYASAKI

0.8/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/passing_cyclone/total_passing_Asia_suppl.gmt

HH50˚N80.

50˚NK
280

0.8280month-1

4281.040˚N280 K

290

KH0.80.8[K/100km]|∇(SST)|

0.840˚N

K0.8120˚E150˚E150˚E(c) Dec: track freq. (shade) & SST (gray line)
2012 Mar 23 13:01:27|∇(SST)|

0.8

H

0.8

290 K

[K/100km]

4K

0.8

month-1

K4288 KH

1280 K

H284 K
292 K

288 K

0.6

2H

290 K

292 K

80.

0.4
30˚N30˚N

10.80.8

EASE grid = 145 * 145 grids on polar stereographic projection (125 km interval)
Short-living cyclones ( < 2 day) are omitted

Lat/lon SLP data were interpolated on the Equal Area Scalabel Earth (EASE) grid.
"ftp://ftp.cdc.noaa.gov/Datasets.other/map/storm/" made by M. C. Serreze
Brown line: topography (2000 m)

0.21296 K

296 K

Search range: 4grid; pdiff = 0.5

120˚E120˚E2012 Mar 22 19:37:24

150˚E

150˚E(e) Jan: track freq. (shade) & SST (gray line)(f) Jan: Eady growth rate (blue); SST (gray), |∇(SST)| (shade)

50˚N76 K

22012 Apr
16:01:42 /home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/growth_rate/Asia_EGR_SST_clim_suppl.gmt
M.24HAYASAKI/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/passing_cyclone/total_passing_Asia_suppl.gmt

HH

H
0.80.850˚N[K/100km]
0K28|∇(SST)|440˚N

40˚N

28

4

1.00.8
K

0.8

280K

month-1

H276

K

280

K

0.8

0.8
K0.6

290 K

292K10.80.21Search range: 4grid; pdiff = 0.5

K296

0.8120˚E150˚E150˚E120˚E

292 K

EASE grid = 145 * 145 grids on polar stereographic projection (125 km interval)
Short-living cyclones ( < 2 day) are omitted

Lat/lon SLP data were interpolated on the Equal Area Scalabel Earth (EASE) grid.
"ftp://ftp.cdc.noaa.gov/Datasets.other/map/storm/" made by M. C. Serreze
Brown line: topography (2000 m)(g) Feb: track freq. (shade) & SST (gray line)(h) Feb: Eady growth rate (blue); SST (gray), |∇(SST)| (shade)2012 Apr
15:59:36 /home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/growth_rate/Asia_EGR_SST_clim_suppl.gmt
M.24HAYASAKI/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/passing_cyclone/total_passing_Asia_suppl.gmt

50˚27650˚N

0.8

2012 Mar 22 19:37:29

2

H

288 K

0.4
30˚N

30˚N

K
288

1284 K0.

290 K8280

K

N 1

H
[K/100km]|∇(SST)|
0.8

280280K

Kmonth-1
1.0
H0.8

840˚N0.

40˚N

0.8

0.80K0K

H28K2844K8K

28K2288 KH

290 K

10.430˚N30˚N61282840.6
290 K

27292 K0.2

292 K

0.8

10.8120˚E150˚E150˚E120˚E296 K

Supplement 1: Monthly climatology of cyclone track frequencies (shadein left column. unit: count/month) and horizontal
M. HAYASAKIsea surface temperature (SST) gradient (shade in right column. |∇SST| ≥ 1.0 K (100 km)−1 ) for a cold half year (Nov–Apr) in 1982–2009. Thick blue lines in right column show the maximum Eady growth rate (σ ≡ 0.31 f |∂V /∂z|N −1 ;σ ≥ 0.8 day−1 . See Hoskins and Valdes, 1990). Triangles represent primary path of cyclones that is determined by the gridwith the largest frequency inside the search area (surrounded by dashed line in (a)) along row direction of the EASE grid
(approximately northwest-southeast direction around Japan). Thin solid lines show climatological SST (2 K interval).
2012 Mar 22 19:37:34/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/passing_cyclone/total_passing_Asia_suppl.gmt

2012 Apr 24 15:59:48/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/growth_rate/Asia_EGR_SST_clim_suppl.gmt

Hayasaki and Kawamura, Cyclone activities for springtime heavy rain episodes in Japan
EASE grid = 145 * 145 grids on polar stereographic projection (125 km interval)
Short-living cyclones ( < 2 day) are omitted

Lat/lon SLP data were interpolated on the Equal Area Scalabel Earth (EASE) grid.
"ftp://ftp.cdc.noaa.gov/Datasets.other/map/storm/" made by M. C. Serreze
Brown line: topography (2000 m)

Search range: 4grid; pdiff = 0.5(i) Mar: track freq. (shade) & SST (gray line)(j) Mar: Eady growth rate (blue); SST (gray), |∇(SST)| (shade)0.850˚
NHH50˚

0.8
271N1.26H

K[K/100km]

month-1
280

K

280

1.040˚N

0.

8

140˚N

0.8

1.2

0.80K

H
0K

280.6K288

KK

21284

0.8
290 K

2840.8128|∇(SST)|
40.8276 K

K288HK

290 K

0.430˚N30˚NEASE grid = 145 * 145 grids on polar stereographic projection (125 km interval)Short-living cyclones ( < 2 day) are omitted

80.80.

Lat/lon SLP data were interpolated on the Equal Area Scalabel Earth (EASE) grid.
"ftp://ftp.cdc.noaa.gov/Datasets.other/map/storm/" made by M. C. Serreze
Brown line: topography (2000 m)

292K

K
2920.80.2

1

Search range: 4grid; pdiff = 0.51

2012 Apr
15:59:59 /home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/growth_rate/Asia_EGR_SST_clim_suppl.gmt
M.24HAYASAKIHHHN12760.850˚N1.2/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/passing_cyclone/total_passing_Asia_suppl.gmt

50˚8(l) Apr: Eady growth rate (blue); SST (gray), |∇(SST)| (shade)
0.

120˚E

150˚E

150˚E

2012 Mar 22 19:37:39

120˚E

296 K(k) Apr: track freq. (shade) & SST (gray line)

K

41.

H
month-1
1.0

K

1.2
1K
280

0.60K

29

290

280

0.80.8

K

288 K

284 K

HK288 K

20.80.430˚N30˚N

44K
286K
27

10.
8

1.20.80.840˚N .8040˚N|∇(SST)|280K
280[K/100km]
1.
4H292 K

292K0.2

1296K296 K120˚E120˚E150˚E150˚E

2012 Mar 22 19:37:44

2012 Apr
16:00:11 /home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/growth_rate/Asia_EGR_SST_clim_suppl.gmt
M.24HAYASAKI/home/viper/hayasaki/paper/submit/20110815_spring_rain_cyclone/script/cyclone/passing_cyclone/total_passing_Asia_suppl.gmt

Supplement 1: (Cont.)

Supplement 2: Monthly mean cyclone frequencies (unit: count/month) around Japan for a cold half year (Nov–Apr) in
1982–2009. The cyclones are selected from migrating cyclones across study area (30◦ – 50◦ N, 130◦ – 150◦ E). Short living
cyclones (total lifetime < 24-hour) are omitted.

allbomb

Nov

DecJanFebMar

Apr

10.3
4.3

10.3
5.6

10.9
5.7

11.2
5.7

14.4
6.2

12.8
2.8