(old): current operational teleconnections products
(new): updated version to be implemented on or around February 15, 2023

Summary of major changes

• Change graphics file formats from .gif to .png
• Addition of netcdf and csv formats
• Discontinue monthly mean PNA index ascii table
• Update filenames to improve consistency

Detailed list of changes

CDAS product changes (graphics)

• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/month.ao.gif
  month.ao.gif (old) → month.ao.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/season.JFM.ao.gif
  season.JFM.ao.gif (old) → season.JFM.ao.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/aao/month.aao.gif
  month.aao.gif (old) → month.aao.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.timeseries.gif
  nao.timeseries.gif (old) → month.nao.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/season.JFM.nao.gif
  season.JFM.nao.gif (old) → season.JFM.nao.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna.timeseries.gif
  pna.timeseries.gif (old) → month.pna.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/season.JFM.nao.gif
  season.JFM.nao.gif (old) → season.JFM.pna.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/nao.timeseries.gif
  nao.timeseries.gif (old) → nao.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/ea.timeseries.gif
  ea.timeseries.gif (old) → ea.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/eawr.timeseries.gif
  eawr.timeseries.gif (old) → eawr.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/scand.timeseries.gif
  scand.timeseries.gif (old) → scand.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/poleur.timeseries.gif
  poleur.timeseries.gif (old) → poleur.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/wp.timeseries.gif
  wp.timeseries.gif (old) → wp.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/epnp.timeseries.gif
  epnp.timeseries.gif (old) → epnp.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/pna.timeseries.gif
  pna.timeseries.gif (old) → pna.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/tnh.timeseries.gif
  tnh.timeseries.gif (old) → tnh.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/pt.timeseries.gif
  pt.timeseries.gif (old) → pt.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/expvar.timeseries.gif
  expvar.timeseries.gif (old) → expvar.timeseries.png (new)
• https://www.cpc.ncep.noaa.gov/data/teledoc/telemonc_new.gif
  telemonc_new.gif (old) → telemonc_new.png (new)

Additional formats for historical archive of all indices

• https://ftp.cpc.ncep.noaa.gov/wd52dg/data/indices/tele_index.nh
  tele_index.nh (current) → monthly_tele_indices.csv (additional)
  tele_index.nh (current) → monthly_tele_indices.nc (additional)

Discontinue/replace products

• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/norm.mon.pna.wg.jan1950-current.ascii.table