Study on the Multi-decadal Fluctuation of Climate Change and Typhoon

Abstract

Climate indices such as El Niño-Southern Oscillation in the Pacific Ocean were investigated to find out a relationship between multi-decadal fluctuations of climate change and tropical storms, in particular typhoon in North West Pacific based on the historical record of typhoon-induced disasters. It was found that the ratio of the category.5 typhoon among the all historical typhoon and recorded developed-low pressure systems in the West Pacific was increased in La Niña dominant period. It is foreseeable that attentions on more intensified and frequent tropical storms, typhoon, should be drawn in the forthcoming La Niña dominant period from this study. The similar results were obtained from the historical record of hurricanes in the Atlantic and in the East Pacific Ocean.

Paleo-tsunami history along the northern Japan Trench: evidence from Noda Village, northern Sanriku coast, Japan

“…Therefore, it is likely that such storm conditions did not affect the study area. As for the strength of storms, Mishima et al (2009) proposed that seawater temperature is the most important factor. According to Koizumi and Sakamoto (2010), the sea surface temperatures around Japan have been almost constant for the past 3000 years.…”

“…Multi-decadal climate fluctuations in the NW Pacific Ocean also affect seawater temperature. However, Mishima et al (2009) showed that seawater temperature, which has a cycle of 30-40 years, has had less of an influence on multi-decadal climate fluctuations, based on records from the last several hundred years. Therefore, it is likely that there has been no clear change in storm strength over the past 3000 years.…”