Table 1.
List of cyclone detection and tracking methods used in this study with code number in the IMILAST dataset and main bibliographic reference for the description of each method.
Table 2.
Number of NECs/ECs detected in each list before (first and third columns) and after (second and fourth columns) applying the filter on the maximum velocity.
Fig. 1.
(a) Time series of interannual variability of ECs in NH (blue) and SH (red). Thick line shows the MCDTM, respectively, for NH (blue) and SH (red). Dashed lines mark the spread of all the data in NH (blue) and SH (red). ECindex is shown in NH (b, blue) and SH (c, red). Thick line shows the MCDTM ECindex, respectively, for NH (blue) and SH (red). Dashed lines mark the spread of all the data in NH (blue) and SH (red). Black lines show the tendency line computed trough a linear fit.
Fig. 2.
Inter-monthly relative frequency (in %) of ECs in NH (blue) and SH (red). The upper and lower limits of the boxes correspond to 25th and 75th percentiles, the whiskers represents the min/max values, and – represents the median among the methods in each month.
Fig. 3.
Track (a,b) density of ECs according to the MCDTM in NH (first column) and SH (second column). Colors represent the probability (%) that a cyclone track crosses each 1.5 x 1.5 cell of the domain in the 6-hourly field (values according to the label bar below the panels). The filled fraction of each cell corresponds to the level of agreement (given by the normalised standard deviation) among methods as annotated below the panels.
Fig. 4.
Same as Fig. 3 but for cyclogenesis (a,b) and explosive deepening (c,d).
Fig. 5.
Relative frequency (%) of NECs (full box) and ECs (empty box) in NH (blue) and SH (red) as function of: (a,b) their lifetime MSLPmin considering 10 hPa wide bins and covering the range from 930 to 1020 hPa, (c,d) speedmax (in km h−1) considering 20 km/h wide bins and covering the range 0–140 km/h, (e,f) duration (in h) considering 24 h wide bins and covering the range 0–240 h illustrated by box plots: the NH (first column) and SH (second column). The upper and lower limits of the boxes correspond to 25th and 75th percentiles, the whiskers represents the min/max values, – represents the median among the methods in each month.
Fig. 6.
Same as Fig. 5 but (a,b) DRmax (in hPa/6h) considering 3 hPa wide bins and covering the range from –21 hPa/6h to 0 hPa/6h, (c,d) ADRmax (in hPa/6h) considering 3 hPa wide bins and covering the range –21 hPa/6h to 0 hPa/6 h, (e,f) NDRcmax (in hPa/24h) considering 4 hPa wide bins and covering the range from –44hPa/hPa to 0 hPa/24 h.
Table 3.
Median of 25th, 50th, 75th and 90th related to the MSLPmin, DRmax, ADRmax, NDRcmax, speedmax and DURATION of ECs in NH (black) and SH (red).
Fig. 7.
Areas selected for the regional analysis in NH (a): WPAC (blue), EPAC (red), WATL (green), EATL (fuchsia). SH (b): SAME (red), SAFR (blue), AUST (green).
Fig. 8.
Relative frequency (%) of X[0p,50p], X[50p,75p], X[75p,100p] with X corresponding to speedmax (a) and duration (b) in WPAC (blue), EPAC (red), WATL (green) and EATL (fuchsia) as function of speedmax (a) and duration (b) value falling in the percentile interval based on a hemispheric pdf for ECs. The upper and lower limits of the boxes correspond to 25th and 75th percentiles, the whiskers represents the min/max values, and – represents the median among the methods in each month.
Fig. 9.
Same as Fig. 8 for MSLPmin(a), DRmax(b), ADRmax(c) and NDRcmax(d).
Fig. 10.
Same as Fig. 8 but for SAFR (blue), SAME (red) and AUST (green).
Fig. 11.
Same as Fig. 9 but for SAFR (blue), SAME (red) and AUST (green).