Abstract
Western North Pacific tropical cyclone (TC) activity is known to have a significant response to El Niño and Southern Oscillation (ENSO). Among the TC intensity classifications, “super typhoon”, is widely used as a symbolic word for warning people about the potential for experiencing the most severe typhoon. This study quantifies the contribution of super typhoons to TC activity in response to ENSO, where the Southern Oscillation Index (SOI) is used to indicate the internal variation of ENSO. It is found that the number and the genesis location of non-super typhoons are little influenced by ENSO, and the changes are mostly by the addition of super typhoons. Historical levels of El Niño and La Niña span from −2σ to +2σ of the SOI. Over this range of SOI values, the mean response is 5.6 super typhoons (7.1 for El Niño and 1.5 for La Niña) which nearly matches the mean response overall of 6 storms (24.6 for El Niño and 18.6 for La Niña). The spatial distribution of TC genesis locations for different ENSO conditions does not completely explain these results.
Highlights
The results show that the number and genesis locations of non-super typhoons are little influenced by ENSO
The study is based on the assumption of a linear relationship between TC activity and ENSO
Space is made by a principal component analysis (PCA) using INT and FRQ as the two primary inputs
Summary
The results show that the number and genesis locations of non-super typhoons are little influenced by ENSO. The changes are mostly by the addition of super typhoons. The distribution pattern of TC genesis locations at different ENSO status fails to completely explain the results. The study is based on the assumption of a linear relationship between TC activity and ENSO.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
