The following is an excerpt from National Geographic.
Antarctica's ice shelves are losing it.
Conventional wisdom holds that ice shelves—the seaward extension of glaciers on land—lose most of their mass by shedding icebergs. But new research finds that there's another weight-loss program at work—many of Antarctica's ice shelves are melting away from the bottom up.
Glacier experts have known for years that ice shelves melt at the boundary between the ice and the sea. But previous studies have only looked at individual glaciers and ice shelves in Greenland and Alaska, said Erin Pettit, a glacier expert at the University of Alaska in Fairbanks who was not involved in the new research.
A study published today in the journal Science has gone beyond those individual observations and found that about 55 percent of the mass lost from ice shelves in Antarctica is through melting at the ice-ocean boundary. (Learn more about The Big Thaw in National Geographic magazine.)
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Heavy rain and mountain snow will pound the northwestern United States early this week, with the most significant impacts targeting Northern California.
Southern California bore the brunt of the latest storm to blast into the western United States on Friday.
Less than a week after tornadoes tore through parts of Houston and New Orleans, a new threat of flooding and locally severe thunderstorms will return into Monday.
The taste of spring across the United Kingdom will peak on Monday before the threat for windstorms returns.
A stormy weather pattern unfolding across Europe this week will lead to showers and gusty winds sweeping into Germany on a daily basis.
A tropical low will threaten coastal communities around the Gulf of Carpentaria with flooding downpours through early this week.
One of the biggest storms in years bombarded Southern California with heavy rain and gusty winds to end the week.
On Friday afternoon, the Senate confirmed Scott Pruitt as the new head of the Environmental Protection Agency, which may start a new era for the environmental policy of the United States.