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CAM Global RCE simulations TC track, radial profiles, and filtered precipitation files

Citation

Stansfield, Alyssa; Reed, Kevin (2021), CAM Global RCE simulations TC track, radial profiles, and filtered precipitation files, Dryad, Dataset, https://doi.org/10.5061/dryad.x3ffbg7jv

Abstract

This dataset includes processed output from the Community Atmosphere Model (CAM), version 5, the atmospheric component of the Community Earth System Model (CESM2). CAM was run in a global rotating radiative convective equilibrium (RCE) aquaplanet configuration for 2 years, with the first 2 months discarded to allow for spin-up. The globally-uniform sea surface temperature (SST) was varied from 295 to 305 K in 1 K increments, producing a total of 11 model simulations. More details about CAM and the RCE configuration can be found in the associated manuscript in JGR: Atmospheres. The TempestExtremes software package (https://github.com/ClimateGlobalChange/tempestextremes) was used to track tropical cyclones (TCs) in the raw model output. Specifically DetectNodes and StitchNodes were used to locate potential TCs based on sea level pressure minima and then stitch these TC candidates into tracks based on spatial proximity. NodeFileEditor was used to calculate a radial wind profile at each timestep in each TCs' lifetime, and from these radial profiles, the TCs' outer sizes were estimated based on the radii of 8 m/s winds, outside the radii of maximum winds. Lastly NodeFileFilter was used to extract all precipitation within these calculated outer sizes at each timestep in each TC's lifetime. This dataset contains the TC track files, the TC radial wind profile and outer size files, and the filtered TC precipitation files. Note that while the track and radial profile files contain data from TCs all over the global domain, the filtered TC precipitation files only contain precipitation froms TCs between 40°S and 40°N because that's the domain we used for the TC precipitation analysis in the manuscript. 

Usage Notes

The TC track and radial profile files are text files, while the TC precipitation files are netCDF files. The columns of the track files are as follows: TC center node number (data is on an unstructured grid), TC center longitude, TC center latitude, TC minimum sea level pressure [Pa], TC maximum wind speed at lowest model level [m/s], model year, model month, model day, and model hour. The columns of the radial profile files are as follows: TC center node number, TC center longitude, TC center latitude, radius of the 8 m/s wind [great circle degrees], radial wind profile [m/s], Accumulated Cyclone Energy [m/s], model year, model month, model day, and model hour. The TC precipitation files contain the following variables: time, lat (latitude), lon (longitude), PRECT (TC precipitation), and mask (a binary variable which is 1 for gridpoints within a TC's outer size and 0 for gridpoints outside TCs). The dimensions of the variables are time and ncol, which is the number of nodes in the unstructured grid. The other file in the dataset is ne120.connect_v2.dat, which is a grid connectivity file for the unstructured grid. This file is needed if any more TempestExtremes functions will be run on the data files. 

Funding

Office of Science, Award: DE-SC0016605

National Science Foundation, Award: DGE-1633299

National Science Foundation, Award: AGS-1830729