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Warning Signs of Tipping Point for Greenland Ice Sheet
May 27, 2021•
Physics 14, 80
A stability analysis of the ice sheet covering a large area of Greenland suggests that the ice melting may be approaching a point of no return.
Copernicus Sentinel data, processed by ESA Satellite image of the Jakobshavn Glacier the fastest retreating glacier in Greenland. The analysis of melt rates in the last 150 years indicates the glacier might be approaching a tipping point.
Copernicus Sentinel data, processed by ESA Satellite image of the Jakobshavn Glacier the fastest retreating glacier in Greenland. The analysis of melt rates in the last 150 years indicates the glacier might be approaching a tipping point.×
The Ruddiman Hypothesis: A Debated Theory Progresses Along Interdisciplinary Lines
By Rich Blaustein - 24 February 2021
Scientist William Ruddiman is the lead proponent of the Early Anthropocene Hypothesis, which asserts pre-industrial land clearing and agricultural practices caused the release of historically underappreciated amounts of greenhouse gases, transforming the Earth. While Ruddiman’s hypothesis has engendered debate, a recent interglacial-ice age study and interdisciplinary archaeological investigations add nuanced support to Ruddiman’s effort and illuminate how humans have impacted the biosphere over thousands of years. In an interesting twist to this debate, these recent land clearing studies offer a clarifying, long-term context for natural solutions for the climate crises by highlighting the Earth’s regrowth potential.