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图片 | 2017年 5月 5日 星期五 00:10 BJT

Antarctica's fragile ice

An oblique view of a massive rift in the Antarcitc Peninsula's Larsen C ice shelf. A crack that could create an iceberg the size of Delaware - and destabilize one of the largest ice shelves in the Antarctic - has branched out and begun to widen more quickly, a scientist has said. Located on the Larsen C ice shelf, the fourth largest in Antarctica, the new Antarctica crack is an offshoot of a rupture that gained notice after growing dramatically in 2014, and last year was forecast to cause the separation of a 1,900-square-mile (5,000-square-kilometer) iceberg within years. Photo taken November 2016.     
 

Courtesy John Sonntag/NASA/via REUTERS

An oblique view of a massive rift in the Antarcitc Peninsula's Larsen C ice shelf. A crack that could create amore

An oblique view of a massive rift in the Antarcitc Peninsula's Larsen C ice shelf. A crack that could create an iceberg the size of Delaware - and destabilize one of the largest ice shelves in the Antarctic - has branched out and begun to widen more quickly, a scientist has said. Located on the Larsen C ice shelf, the fourth largest in Antarctica, the new Antarctica crack is an offshoot of a rupture that gained notice after growing dramatically in 2014, and last year was forecast to cause the separation of a 1,900-square-mile (5,000-square-kilometer) iceberg within years. Photo taken November 2016. Courtesy John Sonntag/NASA/via REUTERS
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Adelie penguins stand atop a block of melting ice on a rocky shoreline at Cape Denison, Commonwealth Bay, in East Antarctica. 

REUTERS/Pauline Askin

Adelie penguins stand atop a block of melting ice on a rocky shoreline at Cape Denison, Commonwealth Bay, in Emore

Adelie penguins stand atop a block of melting ice on a rocky shoreline at Cape Denison, Commonwealth Bay, in East Antarctica. REUTERS/Pauline Askin
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The B-31 Iceberg is seen after separating from a rift in Antarctica's Pine Island Glacier in November 2013. 


NASA Earth Observatory/Holli Riebeek/via REUTERS

The B-31 Iceberg is seen after separating from a rift in Antarctica's Pine Island Glacier in November 2013. more

The B-31 Iceberg is seen after separating from a rift in Antarctica's Pine Island Glacier in November 2013. NASA Earth Observatory/Holli Riebeek/via REUTERS
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Melting ice shows through at a cliff face at Landsend, on the coast of Cape Denison in Antarctica.


REUTERS/Pauline Askin

Melting ice shows through at a cliff face at Landsend, on the coast of Cape Denison in Antarctica. REUTERS/Pmore

Melting ice shows through at a cliff face at Landsend, on the coast of Cape Denison in Antarctica. REUTERS/Pauline Askin
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Glaciers of Livingston Island are pictured in the Antarctica continent. 


REUTERS/Paulo Whitaker

Glaciers of Livingston Island are pictured in the Antarctica continent. REUTERS/Paulo Whitaker

Glaciers of Livingston Island are pictured in the Antarctica continent. REUTERS/Paulo Whitaker
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Adelie penguins stand atop ice near the French station at Dumont d�Urville in East Antarctica. 


REUTERS/Pauline Askin

Adelie penguins stand atop ice near the French station at Dumont d�Urville in East Antarctica. REUTERS/Paulmore

Adelie penguins stand atop ice near the French station at Dumont d�Urville in East Antarctica. REUTERS/Pauline Askin
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A glaciologist with the British Antarctic Survey installs a pole into the Wilkins Ice Shelf as part of a satellite monitoring system. REUTERS/Alister Doyle

A glaciologist with the British Antarctic Survey installs a pole into the Wilkins Ice Shelf as part of a satelmore

A glaciologist with the British Antarctic Survey installs a pole into the Wilkins Ice Shelf as part of a satellite monitoring system. REUTERS/Alister Doyle
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General view of the Taylor Glacier near McMurdo Station. 


REUTERS/Mark Ralston/Pool

General view of the Taylor Glacier near McMurdo Station. REUTERS/Mark Ralston/Pool

General view of the Taylor Glacier near McMurdo Station. REUTERS/Mark Ralston/Pool
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Adelie penguins are pictured at Cape Denison, Commonwealth Bay, in East Antarctica. 


REUTERS/Pauline Askin

Adelie penguins are pictured at Cape Denison, Commonwealth Bay, in East Antarctica. REUTERS/Pauline Askin

Adelie penguins are pictured at Cape Denison, Commonwealth Bay, in East Antarctica. REUTERS/Pauline Askin
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A satellite view of Antarctica. REUTERS/NASA/via Reuters

A satellite view of Antarctica. REUTERS/NASA/via Reuters

A satellite view of Antarctica. REUTERS/NASA/via Reuters
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Ice melt shows through at a cliff face at Landsend on the coast of Cape Denison.  


REUTERS/Pauline Askin

Ice melt shows through at a cliff face at Landsend on the coast of Cape Denison. REUTERS/Pauline Askin

Ice melt shows through at a cliff face at Landsend on the coast of Cape Denison. REUTERS/Pauline Askin
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A Weddell seal lies atop ice at Cape Denison, Commonwealth Bay. 


REUTERS/Pauline Askin

A Weddell seal lies atop ice at Cape Denison, Commonwealth Bay. REUTERS/Pauline Askin

A Weddell seal lies atop ice at Cape Denison, Commonwealth Bay. REUTERS/Pauline Askin
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Penguins can be seen walking across ice at Cape Denison, Commonwealth Bay. 


REUTERS/Pauline Askin

Penguins can be seen walking across ice at Cape Denison, Commonwealth Bay. REUTERS/Pauline Askin

Penguins can be seen walking across ice at Cape Denison, Commonwealth Bay. REUTERS/Pauline Askin
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Icebergs grind against the shallows off the Rothera base, run by the British Antarctic Survey, on the Antarctic Peninsula. 

REUTERS/Alister Doyle

Icebergs grind against the shallows off the Rothera base, run by the British Antarctic Survey, on the Antarctimore

Icebergs grind against the shallows off the Rothera base, run by the British Antarctic Survey, on the Antarctic Peninsula. REUTERS/Alister Doyle
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A mountain is reflected in a bay that used to be covered by the Sheldon glacier on the Antarctic peninsula. 


REUTERS/Alister Doyle

A mountain is reflected in a bay that used to be covered by the Sheldon glacier on the Antarctic peninsula. more

A mountain is reflected in a bay that used to be covered by the Sheldon glacier on the Antarctic peninsula. REUTERS/Alister Doyle
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The Thwaites Glacier in Antarctica, seen in 2014. 
 


REUTERS/NASA

The Thwaites Glacier in Antarctica, seen in 2014. REUTERS/NASA

The Thwaites Glacier in Antarctica, seen in 2014. REUTERS/NASA
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A pair of Adelie penguins are pictured at Cape Denison, Commonwealth Bay. 



REUTERS/Pauline Askin

A pair of Adelie penguins are pictured at Cape Denison, Commonwealth Bay. REUTERS/Pauline Askin

A pair of Adelie penguins are pictured at Cape Denison, Commonwealth Bay. REUTERS/Pauline Askin
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