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.<br> Tracking algorithm described in Hunt and Fletcher (2018) [doi:10.1007/s00382-019-04744-x] and Hunt <em>et al.</em> (2016) [doi:10.1175/MWR-D-15-0138.1].<br> <br> Description of fields:<br> <em>x</em>: longitude<br> <em>y</em>: latitude<br> <em>frame</em>: hours since 1979-01-01 00UTC<br> <em>year</em>: year of track point<br> <em>month</em>: month of track point<br> <em>day</em>: day in month of track point<br> <em>hour</em>: hour in day of track point<br> <em>radius</em>: approximate radius of positive vorticity region associated with LPS (x 100 km)<br> <em>max_vort</em>: maximum vorticity within 400 km of LPS centre (in the 850-700 hPa layer average)<br> <em>mean_vort</em>: mean vorticity within 400 km of LPS centre (in the 850-700 hPa layer average)<br> <em>mean_vort_850</em>: mean vorticity within 400 km of LPS centre (in the 850 hPa layer)<br> <em>mean_vort_700</em>: mean vorticity within 400 km of LPS centre (in the 700 hPa layer)<br> <em>mean_vort_500</em>: mean vorticity within 400 km of LPS centre (in the 500 hPa layer)<br> <em>max_trunc_vort</em>: maximum T63 truncated vorticity within 400 km of LPS centre (in the 850-700 hPa layer average)<br> <em>track_id</em>: unique integer identifier for each track (constituting a group of points)