Multiple factors -- including climate change, population growth and urban heat islands -- are increasing heat exposure in the world's cities, endangering people's health, according to a recently published study. Columbia University geographer Cascade Tuholske co-authored the study, which involved examining data for more than 13,000 cities over more than 30 years, finding that urban heat exposure has risen by nearly 200%.
Earthquakes are a significant risk for the millions of people living in and around Mexico City -- including poorer residents who work and study in the city but live in surrounding areas. Social geographer Pere Sunyer of the Autonomous Metropolitan University Iztapalapa says a lack of affordable or public housing has forced people to live in areas not suitable for habitation.
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Researchers have observed a very large hole in the Arctic's thickest and oldest ice near Ellesmere Island and describe the find in Geophysical Research Letters. The hole, called a polynya, is a large area of water that may have opened up as a result of a storm that hit the area in May 2020 but quickly closed again by the end of the month.
There is more water vapor in the atmosphere than there was in the mid-1990s, exacerbating stormy conditions. The vapor can also contribute to rapid intensification of storms such as Hurricane Ida, which moved to Category 4 from Category 1 in less than 24 hours.
A project off the coast of Adelaide, Australia, aims to gather better data on wave action to help preserve the shoreline. Three buoys have been deployed to gather the data that will help develop morphodynamic models to predict how rising seas and a changing climate stand to reshape the coast.
Darkening skies, dropping temperatures and quickening winds are all tell-tale signs that help people recognize that a severe storm might be approaching. By using satellite imaging to observe phenomena occurring above the clouds, however, scientists have discovered another warning that a developing storm may bring violent tornadoes, winds or hail.
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AAG Among 80 Geographical Societies in Joint Statement on Climate Emergency
The American Association of Geographers has signed on to a letter calling for greater action by geographers and greater accountability by world leaders on the climate emergency and the biodiversity crisis. Read more here.