This repository contains data, code and other source files associated with a paper Assessment of zonally symmetric and asymmetric components of the Southern Annular Mode using a novel approach published in Climate Dynamics.

Campitelli, E., Díaz, L.B. & Vera, C. Assessment of zonally symmetric and asymmetric components of the Southern Annular Mode using a novel approach. Clim Dyn (2021). https://doi.org/10.1007/s00382-021-05896-5

BibTex citation:

@article{campitelli2021,
  title = {Assessment of Zonally Symmetric and Asymmetric Components of the {{Southern Annular Mode}} Using a Novel Approach},
  author = {Campitelli, Elio and Díaz, Leandro B. and Vera, Carolina},
  date = {2021-08-09},
  journaltitle = {Climate Dynamics},
  shortjournal = {Clim Dyn},
  issn = {1432-0894},
  doi = {10.1007/s00382-021-05896-5},
  url = {https://doi.org/10.1007/s00382-021-05896-5},
  urldate = {2021-08-09}
}

Clone this repo. If using RStudio, open the project.

System dependencies (on ubuntu) are listd in system-deps.txt. To install them you can use

xargs sudo apt-get install -y < system-deps.txt

This project uses the renv package to manage a reproducible environment. If opening this project with RStudio or starting R from the command line from the root directory, renv should automagically install and load itself.

To recreate the environment then run

renv::restore()

This should install all the package dependencies needed to install the package and compile the document. Depending on your operating system, this could take a while.

Then install this package with

if (!require("devtools")) {
   install.packages("devtools")
}
devtools::install()

To get the data needed to reproduce this paper you'll need to set create a user here. Once you have your user ready, to to your user page copy your UID and API Key and set them in the environmental variables CDSKEY and CDSUSER. You can do this by creating a file called .Renviron on the root folder of this project with

CDSUSER = "xxxx"
CDSKEY = "xxxxxxx-xxxxxx-xxxx-xxx-xxxxxxxx"

Note that your USER is NOT the user you use to authenticate on the website, but the 5 or 6 digit number you see on the "API key" section on your user page

Then, run analysis/scripts/01-get-data.R.

Secondly, run analysis/scripts/02-compute-eofs.R.

Finally, knit the main manuscript located at analysis/paper/asymsam.Rmd.