00:00When massive icebergs break loose from places like Antarctica, it can send tons of ice floating
00:08elsewhere, and it's one of the most illustrative signs of global warming. Well, experts say one
00:14of these calving events has happened again, the third such event in just the last four years.
00:19The iceberg broke loose on May 20th, captured in this image by the Copernicus Sentinel-1
00:23satellite. The giant iceberg has now been named A83, and you can see it breaking free,
00:29and it's utterly massive. Experts say this chunk of ice is around 147 square miles an area,
00:35or nearly seven times the size of Manhattan in New York. This and other calving events like it
00:41reveal a weakening of ice in Antarctica, caused by increasing temperatures at our poles.
00:46The effects of global warming tend to be more extreme in the coldest areas of the planet,
00:50with temperatures going up faster at the poles than anywhere else. Calving events like this
00:55are of particular import to climate scientists as well. When giant ice sheets break loose,
00:59they not only indicate warming oceans, but these sheets also melt faster as a result,
01:04raising sea levels and acidifying our planet's waters at a quicker rate. This also exposes a
01:09greater area of the ocean water to solar radiation, exacerbating the problem even further.
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