DOI: 10.5061/dryad.31zcrjdsb
title: Rainfall associated with tropical and post-tropical cyclones in the high resolution HadGEM3-GC31-HM model

description: One of the most costly effects of climate change will be its impact on
 extreme weather events, including tropical cyclones (TCs). Understanding
 these changes is of growing importance, and high resolution global climate
 models are providing potential for such studies, specifically for TCs.
 Beyond the difficulties associated with TC behavior in a warming climate,
 the extratropical transition (ET) of TCs into post-tropical cyclones
 (PTCs) creates another challenge when understanding these events and any
 potential future changes. PTCs can produce excessive rainfall despite
 losing their original tropical characteristics. The present study examines
 the representation of PTCs and their precipitation in three high
 resolution (25-50 km) climate models: CNRM, MRI, and HadGEM. All three of
 these models agree on a simulated decrease in TC and PTC events in the
 future warming scenario, yet they lack consistency in simulated regional
 patterns of these changes, which is further evident in regional changes in
 PTC-related precipitation. The models also struggle with their represented
 intensity evolution of storms during and after the ET process. Despite
 these limitations in simulating intensity and regional characteristics,
 the models all simulate a shift toward more frequent rain rates above 10
 mm/hr in PTCs. These high rain rates become 4-12% more likely in the
 warmer climate scenario, resulting in a 5-12% increase in accumulated
 rainfall from these rates.
description: # HadGEM Model TC and PTC Trajectories, ET Information, and Precipitation
 --- This dataset includes the data from HadGEM3-GC31-HM in the manuscript
 "Using high resolution climate models to explore future changes in
 post-tropical cyclone precipitation" for the analysis of
 precipitation throughout the entire TC life cycle. ## Description of the
 data and file structure This dataset enables the analysis of precipitation
 throughout the entire tropical cyclone (TC) life cycle, including points
 during and after extratropical transition (ET) occurs. The ET process
 enables TCs to lose their tropical characteristics and be sustained by
 midlatitude forcing. The files beginning with
 "traj_et_HadGEM3-GC31-HM" are trajectories for the entire TC and
 PTC life cycle. TCs are first tracked with TempestExtremes, and these
 files are the TC trajectories extended using ExTraTrack to include all
 points during and after ET occurs. The files beginning with
 "etdetails", "etpath", "life_",
 "monthly", "storms", and "yearly" contain
 the rest of the output from ExTraTrack, which includes details about each
 storm's ET timing, intensity, location, and more. Further information
 about the contents of these files can be found here:
 . Finally, the netCDF files
 (beginning in "masked" and ending in ".nc") contain
 the isolated TC and PTC precipitation that exceeds the 95th percentile
 threshold for the model simulations. The 95th percentile varies by
 location and is calculated from all days, regardless of the presence of
 rainfall or not, for each set of simulations- historical and future.
 Precipitation exceeding the 95th percentile is tracked using
 TempestExtremes, then co-located with TCs and PTCs using a dynamical
 radius calculated around the trajectories included in this dataset. A full
 description of the methods can be found in the full manuscript. ##
 Sharing/Access information Raw HighResMIP (HadGEM) data can accessed at:
 TempestExtremes
 is publicly available on GitHub at:
 ExTraTrack
 software is available at