Amplifying feedbacks include increased absorption of sunlight as melting exposes darker surfaces and speedup of iceberg discharge as the warming ocean melts ice shelves that otherwise inhibit ice flow. (giss.nasa.gov)
During major iceberg discharges in the North Atlantic, known as Heinrich events, the ocean overturning circulation slowed to being almost still, the new evidence suggests. (ldeo.columbia.edu)
Heinrich events — abrupt periods of substantial iceberg discharge from the Northern Hemisphere ice sheets — occurred repeatedly throughout the last glacial period and had pronounced global effects on climate. (usclivar.org)