Typhoons in the Philippines storms impacting the Philippines in deadly seasons, see: Typhoons in the Philippines Approximately twenty tropical cyclones enter the Philippine Area of Responsibility yearly, an area which incorporates parts of the Pacific Ocean, South China Sea and the Philippine Archipelago (with the exception of Tawi-Tawi province). Among these cyclones, ten will be typhoons, with five having the potential to be destructive ones. The Philippines is "the most exposed country in the world to tropical storms" according to a Time Magazine article in 2013. In the Philippine languages, typhoons are called "bagyo". Typhoons can hit the Philippines any time of year, with
Ocean acidification in the Arctic Ocean which play an important role in the food-web of various ecosystems. Since they harbour an aragonitic shell, they could be very sensitive to ocean acidification driven by the increase of anthropogenic CO₂ emissions.Laboratory tests showed that calcification exhibits a 28% decrease at the pH value of the Arctic ocean expected for the year 2100, compared to the present pH value. This 28% decline of calcification in the lower pH condition is within the range reported also for other calcifying organisms such as corals. In contrast with sea urchin and bivalve larvae, corals and marine shrimps are more severely impacted by