GHCNv4_ERA5_comparison

Comparison between GHCNv4 datasets (NOAA) and the ERA5 reanalysis (ECMWF).

Table of Contents

• Tools description
  • GHCNv4_automatic_download.py
  • GHCNv4_ERA5_combination.py

Tools description

GHCNv4_automatic_download.py

• Automated download of GHCNv4 datasets from the GISS Surface Temperature Analysis (v4) website using the full list of stations (GHCNv4_stations.txt) or a subset of list of stations that contribute to the final GISTEMP v4 products (GHCNv4_stations_GISTEMP.txt).
• Possibility to select stations within a given footprint area defined by longitude and latitude coordinates.
• Function is run using multiprocessing to drastically decrease computation time.

GHCNv4_ERA5_combination.py

• Matching between GHCNv4 datasets automatically downloaded with GHCNv4_automatic_download.py and ERA5 datasets.
• Possibility to store results in a pickle file (.pkl) and therefore keep the initial (varying) temporal coverage of GHCNv4 datasets.
• Option to plot a simple visualisation of temperature differences between GHCNv4 and ERA5 time series.
• Function is run using multiprocessing to drastically decrease computation time.