1. (AMO) Atlantic Multidecadal Oscillation index. http://esrl.noaa.gov/psd/data/correlation/amon.us.data . Accessed 9/2013
2. (EA) East Atlantic teleconnection index. ftp://ftp.cpc.ncep.noaa.gov/wd52dg/data/indices/ea_index.tim . Accessed: 9/2013
3. (NAO-pc) North Atlantic Oscillation index: PC-based, updated regularly. http://climatedataguide.ucar.edu/sites/default/files/cas_data_files/asphilli/nao_pc_monthly_8.txt . Accessed: 9/2013
4. (NAO-station) North Atlantic Oscillation index: station-based, updated regularly. http://climatedataguide.ucar.edu/sites/default/files/cas_data_files/asphilli/nao_station_monthly_4.txt . Accessed 9/2013
5. (NINO3.4) Niño 3.4 SST index. http://www.esrl.noaa.gov/psd/gcos_wgsp/Timeseries/Nino34/ . Accessed 9/2013