Figure 4
From: Solar forcing of the Indian summer monsoon variability during the Ållerød period
The spectral analysis of G. bulloides time series for the period 14–8 cal kyr BP also shows statistically significant but low amplitude peaks at 227, 209, 196 and 189 years.
The presence of 209-yr solar cycle during the late glacial to Holocene transition suggests that sun plays an important role in deriving small scale variability in Indian summer monsoon wind.
