hat
Depi 1970 nan mitan an, estimasyon mondyal nan destriksyon an potansyèl nan siklòn montre yon tandans le fòtman Koehle ak ogmante twopikal tanperati lanmè-sifas yo. ref Nimewo a nan siklòn fò (Kategori 4 ak 5) ogmante pa sou 75% depi 1970, ak ogmantasyon yo pi gwo obsève nan Endyen an, Nò ak sidwès Oseyan Pasifik. Frekans siklòn nan Nò Atlantik la tou te pi wo pase nòmal nan dènye dekad la. Sepandan, amelyorasyon nan kapasite nou yo obsève siklòn ka gen partial prensip sa yo. ref
eng
Since the mid 1970’s, global estimates of the potential destructiveness of hurricanes show an upward trend strongly correlated with increasing tropical sea-surface temperature. ref The number of strong hurricanes (Category 4 and 5) increased by about 75% since 1970, with the largest increases observed in the Indian, North and Southwest Pacific Oceans. The frequency of hurricanes in the North Atlantic has also been above normal over the last decade. However, improvements in our ability to observe cyclones may have biased these estimates. ref