Low-pressure system (LPS) tracks in ERA5 over South Asia (1979-2021) v3.0

LPS tracks over South Asia (India, Sri Lanka, Pakistan), computed using hourly ERA5 reanalysis data.
Tracking algorithm described in Hunt and Fletcher (2018) [doi:10.1007/s00382-019-04744-x] and Hunt et al. (2016) [doi:10.1175/MWR-D-15-0138.1].

Description of fields:
x: longitude
y: latitude
frame: hours since 1979-01-01 00UTC
year: year of track point
month: month of track point
day: day in month of track point
hour: hour in day of track point
radius: approximate radius of positive vorticity region associated with LPS (x 100 km)
max_vort: maximum vorticity within 400 km of LPS centre (in the 850-700 hPa layer average)
mean_vort: mean vorticity within 400 km of LPS centre (in the 850-700 hPa layer average)
mean_vort_850: mean vorticity within 400 km of LPS centre (in the 850 hPa layer)
mean_vort_700: mean vorticity within 400 km of LPS centre (in the 700 hPa layer)
mean_vort_500: mean vorticity within 400 km of LPS centre (in the 500 hPa layer)
max_trunc_vort: maximum T63 truncated vorticity within 400 km of LPS centre (in the 850-700 hPa layer average)
track_id: unique integer identifier for each track (constituting a group of points)