l****z
发帖数: 29846 | 1 Antarctica sets new record for sea ice
Posted on June 29, 2014 by Harold Ambler
Antarctic sea ice has set a new all-time record maximum over the weekend of
June 28-29, 2014.
The sea ice surrounding Antarctica, which, as I reported in my book, has
been steadily increasing throughout the period of satellite measurement that
began in 1979, has hit a new all-time record high for areal coverage.
The new record anomaly for Southern Hemisphere sea ice, the ice encircling
the southernmost continent, is 2.074 million square kilometers and was
posted for the first time by the University of Illinois at Urbana-Champaign
’s The Cryosphere Today early Sunday morning.
It was not immediately apparent whether the record had occurred on Friday or
Saturday. Requests for comment to Bill Chapman, who runs The Cryosphere
Today, were not immediately returned.
The previous record anomaly for Southern Hemisphere sea ice area was 1.840
million square kilometers and occurred on December 20, 2007.
Global sea ice area, as of Sunday morning, stood at 0.991 million square
kilometers above average. (The figure was arrived at by adding the Northern
Hemisphere anomaly and the Southern Hemisphere anomaly. A graph provided by
The Cryosphere Today showed the global anomaly as 1.005 million square
kilometers.)
Although early computer models predicted a diminishment of both Northern
Hemisphere and Southern Hemisphere sea ice due to anthropogenic global
warming, subsequent modeling has posited that the results of warming around
Antarctica would, counter-intuitively, generate sea ice growth.
A freshening of the waters surrounding the southernmost continent as well as
the strengthening of the winds circling it were both theorized as
explanations for the steady growth of Antarctica’s sea ice during the
period of satellite measurement.
A number of prominent climatologists have discounted the growth of Antarctic
sea ice, arguing that it is less significant to global circulation than ice
in the Arctic basin.
Walt Meier, formerly of the National Snow and Ice Data Center and currently
of NASA’s Goddard Institute for Space Studies, has previously said that
Antarctic sea ice, which has little ice that survives year to year, is less
significant than Arctic sea ice to the climate system.
“While the Arctic has seen large decreases through the year in all sectors,
the Antarctic has a very regional signal – with highs in some areas and
lows in others,” Meier said in 2013. “And of course, the Arctic volume is
decreasing substantially through the loss of old ice. The Antarctic, which
has very little old ice, hasn’t much of a volume change, relatively
speaking.”
The new Antarctic record anomaly was more than 10 percent greater than the
previous record.
The steady growth of Antarctic sea ice and its influence on global sea ice
appeared to provide a public relations problem, at a minimum, for those
warning of global warming’s menace. According to Meier and some other
climatologists, global sea ice area is simply not a metric to consider when
examining the climate system.
“A plot of global sea ice is just not informative or useful,” Meier
said.
Global sea ice, during the course of the last year and a half, has seen its
most robust 18-month period of the last 13 years, maintaining, on average, a
positive anomaly for an 18-month period for the first time since 2001.
Phil Jones, of the Climatic Research Unit at the University of East Anglia,
waded into the global sea ice analysis in 2013 as well.
“Adding the Arctic and Antarctic sea ice extents doesn’t make that much
sense as the two regions are at opposite ends of the world, and the seasons
are opposite,” Jones said at the time.
As I also reported in Don’t Sell Your Coat, the temperature at the South
Pole has been declining during the past four decades as well. | T*********I
发帖数: 10729 | 2 真不给面子。不过奥巴马王会对南极结冰量行使executive order。等着瞧。 | s****a
发帖数: 238 | | s***n
发帖数: 1280 | 4 从1979年卫星开始记录冰层面积以来，大体的趋势就是北冰洋冰层面积在大幅度缩小，
南极洲冰层面积在小幅增加，但全球的冰层总面积是在缩小。所以你如果认定冰层面积
和全球温度相关，很自然的结论就是全球暖化。
of
that
【在 l****z 的大作中提到】
: Antarctica sets new record for sea ice
: Posted on June 29, 2014 by Harold Ambler
: Antarctic sea ice has set a new all-time record maximum over the weekend of
: June 28-29, 2014.
: The sea ice surrounding Antarctica, which, as I reported in my book, has
: been steadily increasing throughout the period of satellite measurement that
: began in 1979, has hit a new all-time record high for areal coverage.
: The new record anomaly for Southern Hemisphere sea ice, the ice encircling
: the southernmost continent, is 2.074 million square kilometers and was
: posted for the first time by the University of Illinois at Urbana-Champaign
| l****z
发帖数: 29846 | 5 我另外一个贴里面就讲到,全美最热的月份其实发生在1930年.
【在 s***n 的大作中提到】
: 从1979年卫星开始记录冰层面积以来，大体的趋势就是北冰洋冰层面积在大幅度缩小，
: 南极洲冰层面积在小幅增加，但全球的冰层总面积是在缩小。所以你如果认定冰层面积
: 和全球温度相关，很自然的结论就是全球暖化。
:
: of
: that
| T*********I
发帖数: 10729 | |
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