Recent Changes to CPC Daily Teleconnections Products
(AAO, AO, NAO, and PNA)

(old): legacy version that was replaced on March 3, 2022
(new): updated version implemented on March 3, 2022

Summary of major changes

• Change files from ascii format to .csv format and adding a netcdf format
• Increase frequency of CDAS file update from monthly to daily
• Change graphics file formats from .gif to .png
• Discontinue binary/ctl file formats.
• Update filenames from older "mrf" to current "gfs" and from "ensf" to "gefs"
• Add 120 day rotating files with GFS and GEFS output

Detailed list of changes

CDAS product changes (indices and graphics)

• https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.ao.index.b500101.current.ascii
  norm.daily.ao.index.b500101.current.asci (old) → norm.daily.ao.cdas.z1000.19500101_current.csv (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/hgt.ao.cdas.gif
  hgt.ao.cdas.gif (old) → hgt.ao.cdas.png (new)
• https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.aao.index.b790101.current.ascii
  daily.aao.index.b790101.current.ascii (old) → norm.daily.aao.cdas.z700.19790101_current.csv (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/hgt.aao.cdas.gif
  hgt.aao.cads.gif (old) → hgt.aao.cdas.png (new)
• https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.nao.index.b500101.current.ascii
  norm.daily.nao.index.b500101.current.ascii (old) → norm.daily.nao.cdas.z500.19500101_current.csv (new)
• https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.pna.index.b500101.current.ascii
  norm.daily.pna.index.b500101.current.ascii (old) → norm.daily.pna.cdas.z500.19500101_current.csv (new)
• https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.nao.index.b500101.current.ascii
  norm.daily.nao.index.b500101.current.ascii (old) → norm.daily.nao.cdas.z500.19500101_current.csv (new)
• https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.pna.index.b500101.current.ascii
  norm.daily.nao.index.b500101.current.ascii (old) → norm.daily.pna.cdas.z500.19500101_current.csv (new)

GFS product changes (indices and graphics)
'mrf' in the names of data files and figures (old) → 'gfs' (new)

• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/daily.index.ascii
  daily.index.ascii (old) → norm.daily.ao.nao.pna.aao.gdas.120days.csv (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/ao.mrf.gif
  ao.mrf.gif (old) → ao.gfs.fcst.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/diff.gif
  diff.gif (old) → ao.gfs.diff.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.mrf.gif
  nao.mrf.gif (old) → nao.gfs.fcst.png(new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.mrf.diff.gif
  nao.mrf.diff.gif (old) → nao.gfs.diff.png (new)

GEFS product changes (indices and graphics)
'ensf' in the names of data files and figures (old) → 'gefs' (new)

• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/ao.sprd2.gif
  ao.sprd2.gif (old) → ao.gefs.sprd2.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/ao.fcst.gif
  ao.fcst.gif (old) → ao.gefs.fcst.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/diff.ensm.gif
  diff.ensm.gif (old) → ao.gefs.ensm.diff.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.sprd2.gif
  nao.sprd2.gif (old) → nao.gefs.sprd2.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.fcst.gif
  nao.fcst.gif (old) → nao.gefs.gcst.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.ensm.diff.gif
  nao.ensm.diff.gif (old) → nao.gefs.ensm.giff.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna.sprd2.gif
  pna.sprd2.gif (old) → pna.gefs.sprd2.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna.fcst.gif
  pna.fcst.gif (old) → pna.gefs.fcst.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna.ensm.diff.gif
  pna.ensm.diff.gif (old) → pna.gefs.ensm.diff.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/aao/aao.sprd2.gif
  aao.sprd2.gif (old) → aao.gefs.sprd2.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/aao/aao.fcst.gif
  aao.fcst.gif (old) → aao.gefs.fcst.png (new)
• https://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/aao/aao.diff.ensm.gif
  aao.diff.ensm.gif (old) → aao.gefs.ensm.diff.png (new)

New output added to CPC ftp site (ftp.cpc.ncep.noaa.gov/cwlinks)

norm.daily.ao.gefs.z1000.120days.nc
norm.daily.ao.gefs.z1000.120days.csv
norm.daily.nao.gefs.z500.120days.nc
norm.daily.nao.gefs.z500.120days.csv
norm.daily.pna.gefs.z500.120days.nc
norm.daily.pna.gefs.z500.120days.csv
norm.daily.aao.gefs.z700.120days.nc
norm.daily.aao.gefs.z700.120days.csv
norm.daily.ao.gfs.z1000.120days.nc
norm.daily.ao.gfs.z1000.120days.csv
norm.daily.nao.gfs.z500.120days.nc
norm.daily.nao.gfs.z500.120days.csv
norm.daily.pna.gfs.z500.120days.nc
norm.daily.pna.gfs.z500.120days.csv
norm.daily.aao.gfs.z700.120days.nc
norm.daily.aao.gfs.z700.120days.csv