Glacial Lake Outburst Floods Threaten Hundreds of thousands Globally
Local weather change is exacerbating potential flooding crises at high- and low elevations, three new research warn. Roughly 15 million individuals worldwide — greater than half in India, Pakistan, Peru, and China — stay within the shadow of glacial lakes liable to sudden and catastrophic outbursts, in accordance with a examine revealed Tuesday in Nature Communications.
A second examine, awaiting publication in a peer-reviewed journal, cataloged greater than 150 of such floods and local weather change, primarily attributable to the extraction and combustion of fossil fuels, accelerating glacier soften, making the lakes larger and extra harmful. “We had glacier lake outburst floods previously which have killed many many 1000’s of individuals in a single catastrophic flooding occasion,” co-author of theśNature Communications examine Tom Robinson instructed the AP. “And with local weather change glaciers are melting so these lakes are getting larger, doubtlessly getting extra unstable.”
New mapping reveals elevated coastal threats
A separate examine in Earth’s Future, a publication of the American Geophysical Union, warns sea stage rise will submerge greater than twice as a lot land as earlier fashions had projected. As a result of coastal elevation mapping is so costly, the findings — obtained utilizing laser detection from a satellite tv for pc — are particularly stark in creating international locations the place extra coastal vulnerability mapping has not taken place.
“Consider Lagos in Nigeria,” co-author Aljosja Hooijer instructed Inside Local weather Information. “They’re poorly managed they usually don’t have geographic knowledge. They don’t have elevation fashions they usually don’t do spatial planning, they usually use groundwater. They’re actually pumping themselves downward, as a result of the bottom subsides the place you extract groundwater. And these are all comfortable, sloppy coastal soils, plenty of mangrove clay, stuff that may subside by many meters simply. In order that’s like a triple whammy.” (Glacial lakes: (AP, Washington Post $, E&E $, CNN, Reuters, AFP, South China Morning Post, BBC; Coastal vulnerability: Inside Climate News; Local weather Indicators background: Glacier and ice sheet melt, Sea-level rise)
Courtesy of Nexus Media.