monsoon cloud
1.Periods of quasi 4 year related to the El Nino/southern oscillation (ENSO) phenomenon and quasi 2 year related to the Quasi biennial oscillation (QBO) of the East Asian monsoon are worked out at significant level of 95%by power spectrum analysis of both δ13C series and the reconstructed average low cloud amount level, which reflects the influence of both ENSO and the east Asian monsoon on Antu climate.
