Tsunamis will become more common and more ferocious with global warming, scientists have warned after a study found that global sea level rises will increase the risk of coastal cities being wiped out. Smaller earthquakes that currently pose no serious tsunami threat could unleash waves capable of inundating coastal cities, researchers found in a study focusing on the city of Macau in China. Currently it is considered safe from tsunamis, despite lying within a major earthquake zone. At today’s sea level, it would take a very powerful earthquake tipping past magnitude 8.8 to cause widespread tsunami flooding in Macau. But a half-metre rise in sea level – predicted to occur in the region by 2060 – could more than double the chances of a huge tsunami swamping the territory, according to the research. A three-foot sea level rise, expected by 2100, would increase the risk up to 4.7 times.
Telegraph 16th Aug 2018 read more »
Marine heatwaves could become 41 times more likely across the globe by 2100 than in pre-industrial times if little is done to stop greenhouse gas emissions, a new study finds. Such a surge in heatwaves could push “marine organisms and ecosystems to the limits of the resilience and even beyond, which could cause irreversible changes”, the researchers write in the journal Nature. However, limiting global temperature rise to 1.5C above pre-industrial levels – the aspirational target of the Paris Agreement – could more than halve the rise in frequency and intensity of marine heatwaves, the lead author tells Carbon Brief.
Carbon Brief 15th Aug 2018 read more »