CMIP5 global cyclone tracks

This folder contains cyclone tracks generated for Pepler and Dowdy (2021) These anticyclones were identified using the Murray and Simmonds (1991) and Simmonds et al. (1999) cyclone tracking scheme. The source code and documntation is available at https://cyclonetracker.earthsci.unimelb.edu.au/<br>Tracks are provided for ERA5 during 1979-2019 and for 10 CMIP5 models from historical simulations for 1979-2005, and rcp45 and rcp85 for 2070-2099<br>Surface cyclones are tracked using 6-hourly MSLP, and upper cyclones are tracked using daily 500 hPa geopotential height<br>Cyclone tracks are provided based on the weakest intensity threshold, with the thresholds used in post-processing provided in Supplementary Table S1 from the published paper. For more details on the parameters used for detection and tracking see the files *incycloc and *intrack which are used as inputs for the tracking scheme.<br>A separate track file is provided for each year, beginning on 1 December of the previous year, to allow for the identification of cross-year tracks when relevant.<br>Column headings:ID Track IDFix Instance within trackDate Date* (UTC)Time Time (UTC)Open/closed Is there closed circulation (0) or an "open" ridge. Not used.Lon LongitudeLat LatitudeMSLP Central pressure (hPa)Laplacian Laplacian of MSLP (hPa. Deg.lat^2), which represents the curvature of the MSLP. This is a better indicator of the strength of a systemDepth Depth of anticyclone (hPa)Radius Radius of anticyclone (degrees)Up Steering velocity (U)Vp Steering velocity (V)<br>*Dates are two digit years, and in some cases are wrong because of the way the tracking scheme works (e.g. 1999-2001).<br>References:<br>Murray, R. J., and I. Simmonds, 1991: A numerical scheme for tracking cyclone centres from digital data. Part I: Development and operation of the scheme. Aust. Meteorol. Mag., 39, 155166.<br>Simmonds, I., R. J. Murray, and R. M. Leighton, 1999: A refinement of cyclone tracking methods with data from FROST. Aust. Meteorol. Mag., (special edition), 3549.<br>Pepler, A. and Dowdy, A. 2021: Deep cyclones in the global midlatitudes likely to become less common but cause more intense rainfall