by Gavin Roy A group led by PAGES (Past Global Changes) has ranked human weather observations in South America as the second-highest priority climate data that must be collected, collated, and integrated to understand South America’s climate. Their highest-ranked priority is tree-ring records, with ice-core samples, glacial variations, and marine sediment records coming after. Meteorological […]
Past Geological Changes
PAGES group studies past human impacts on rivers
December 3, 2011
By Gavin Roy Human interaction with rivers began thousands of years ago when organized agriculture first appeared, and the interaction continues today on a grand scale. Rivers are diverted for irrigation, contained by concrete barriers through major cities, and dammed to form reservoirs and generate hydroelectric power. As humans rely on the Earth’s rivers more […]