Characteristics of Cyclogenesis over the Indian Region during 1891-2011 with Special Emphasis on Bay of Bengal vis-à-vis Arabian Sea - Monitoring and Prediction of Tropical Cyclones in the Indian Ocean and Climate Change - page 99

Fig. 1: Trend of various intense cyclonic systems over Indian region, BoB and AS
from 11-years running means for 121 years (1891-2011): (a-b) annual frequencies of
Dep (depression) and above, CS and above, SCS and above for whole Indian region
and (c-f) same but for BoB and AS.
decadal time scale over Indian region, BoB and AS from 11-years running
means for 121 years (1891-2011) in Fig. 2(a to c) shows that both amplitude
and epochal periodicity of cyclonic systems of D and above, over BoB are
much higher than AS. Periodicity and amplitude of frequencies of these systems
for Indian region is also same as BoB because of its dominant formation
capability during most of the period in 1891-2012 with only exception during