Table 1. Definition of North Atlantic climatological (black) and synoptic (red) characteristics.

Characteristic

Definition

JDAY

Julian date

TIME (UTC)

Time

LAT (°N)

Latitude

LON (°W)

Longitude

MSSW (kt)

Maximum sustained surface wind speed

CP (mb)

Central pressure

DML (m)

Climatological depth of mixed-layer

DTL (km)

Distance to land

SPD (kt)

Storm speed of motion

HDG )

Storm heading (360° is north)

SST (°C)

Observed sea-surface temperature

SHRD (kt)

850-200 mb area-averaged vertical shear within 600 km radius

SHRS (kt)

850-500 mb area-averaged vertical shear within 600 km radius

RVOR(10-6 S-1 )

850 mb area-averaged relative vorticity within 1000 km radius

REFC (ms-1 d-1)

200 mb area-averaged relative eddy angular momentum flux convergence from 100-600 km radius

U200 (kt)

200 mb area-averaged u component of wind within 1000 km radius

D200 (10-6 S-1 )

200 mb area-averaged divergence within 1000 km radius

T200 (°C)

200 mb area-averaged temperature within 1000 km radius