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Natural Hazards

Extreme coastal water levels will increase considerably due to climate change, posing an increasing threat of coastal floods due to ‘overtopping’ — a cause of flooding

Climate change and anthropogenic pressures are widely expected to exacerbate hazards such as coastal flooding. One process that could contribute to this is overtopping which occurs when the extreme coastal water level exceeds the maximum elevation of the coastal system (such as dunes, dykes or cliffs). A new global analysis — using satellite-derived models of coastlines — estimates that under a high emissions scenario, the incidence of overtopping, globally, will accelerate faster than the global mean sea-level.Click here to read more

 
COVID-19 cases may rise in cool, dry, wind-free areas with high air pollution, suggests Italian study

Weather variables and air pollution may favour COVID-19 pandemic transmission, leading to a higher number of deaths, finds a new study conducted in Northern Italian cities during the first lockdown of 2020, when all non-essential activities ceased. The researchers paired data on COVID-19 patients in intensive care units (ICUs), in Milan, Trento and Florence, alongside weather variables and air pollution data for the first wave of the pandemic to establish if the water content of the air (humidity), temperature or air pollution1, were positively or negatively correlated to the high numbers of COVID-19 patients in ICU admissions.

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World’s glaciers melting fast: 9.6 trillion tonnes of ice lost in last 50 years

The most comprehensive glacier assessment yet reveals that glacier melt was responsible for 27 mm of sea level rise between 1961 and 2016. Ice loss from glaciers is now the second biggest contributor to rising sea levels after warming water. If glaciers continue to melt at current rates, most — including many in central Asia, central Europe, western Canada and the USA — will vanish during the second half of this century.