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before we go over the evidence supporting climate change’s existence, we should keep something in mind: the notion that there’s net ice gain in the Antarctic is still being debated among top scientists.
the LIDAR altimeter used in the study might register snowpack as increased surface height even though that’s not really a permanent component of the ice sheet (Figure 1). Across large swaths of land surface, this small contribution could propagate into an apparent enormous gain in ice mass that’s not really there
Furthermore, while the Antarctic ice sheet is indeed increasing in size, this is not true for its northern counterpart, the Arctic. And the ice gain in the Antarctic doesn’t cancel out the ice loss in the Arctic. The Antarctic has gained about 7,300 square miles of ice each year since the late 1970s. The Arctic, on the other hand, has lost about 20,800 square miles of ice each year in that same period . Global ice loss is still occurring on a significant scale.
The West Antarctic ice loss trend is new, abrupt, and began after the Industrial Revolution. Its tie to human activity has been demonstrated through a large number of both observations and theoretical models
An important clarification to make: this trend in ice loss in the West Antarctic is one conclusion of the NASA study not being debated. “We’re essentially in agreement with other studies that show an increase in ice discharge in the Antarctic Peninsula and the Thwaites and Pine Island region of West Antarctica,” Jay Zwally, lead author of the study said. Therefore, if the increasing rates of ice loss in the West Antarctic continue, it’ll be only a few decades before they outweigh the ice gain in the East
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