Long-term change of tropical cyclone activity and its impact on Vietnam

Climate change causes catastrophic events. Among them, tropical cyclones (TCs) and extreme precipitation events cause the most damages to the Vietnamese society, economy, and environment. There are some previous researches studied on the variability of TCs activity and the climatology change of TCs rainfall in Vietnam. But, most of the studies conducted separately and focused on the TCs occurring in the South China Sea area, and ignored those from the Philippines Sea. In this study, we analyzed the long-term change of TCs activity from these two ocean basins and estimated its potential impacts on Vietnam during 1977-2016. We found that TCs activity has not changed apparently in frequency and intensity. And, the contribution and spatial distribution of the rainfall events, which associated with TCs activity, are different in each part of Vietnam. Consequently, our findings suggest that in addition to the tropical cyclones activity, those TCs-associated rainfall events should be concerned and included in the preparedness and response plans both in regional and national scale in Vietnam.