README: Assets to
“Quantifying the tropospheric response to individual sudden stratospheric warmings
revealed by an ensemble simulation strategy” by Loeffel et al. (2026)

Readme creator:                     Loeffel; Sheena
Readme creation date:               2026-05-08
Corresponding author:               sheena.loeffel[at]dlr.de

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Overview

This repository contains post-processed data from numerical simulations presented in the following publication:
Title of Publication    "Quantifying the tropospheric response to individual sudden stratospheric
                        warmings revealed by an ensemble simulation strategy"
DOI of Publication      10.5194/egusphere-2025-4164 [preprint; accepted for publication. Final DOI to be added]
Published in            Weather and Climate Dynamics (WCD)

The dataset includes output from:
    - Model simulations (Event Generating Ensemble and Spin-off Ensembles)
    - ERA5 reanalysis data

All files are provided in NetCDF format and include metadata describing variables and units.

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File overview

EGE_indices.nc          Selected output from the Event Generating Ensemble:
                        - Zonal mean zonal wind at 60N at 10hPa and 100hPa for
                            - the ensemble mean (model climatology) and
                            - the composite mean of SSW events
                        - Standardized AO anomaly for SSW composite (i.e. composite mean)

ERA5_indices.nc         ERA5 reanalysis indices:
                        - Zonal mean zonal wind climatology at 60N and 10hPa (U1060 index)
                        - Climatological variability of the U6010 index

spin-offs/              Folder contains NetCDF files for each of the 18 spin-off ensembles: indices_{spin-off}.nc
                        Each file includes:
                        - Ensemble mean and spread of standardized geopotential height anomalies over the polar cap (60N–90N)
                        - Ensemble mean and spread of zonal mean zonal wind at 60N and 10hPa
                        The three examples shown in the publication (SSW 1, SSW 2 and SSW 3) are labelled as:
                        - indices_SSW1.nc
                        - indices_SSW2.nc
                        - indices_SSW3.nc