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[Dunia]
Global Warming Hoax - Antarctica gaining more ice than losing
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Antarctica gaining more ice than losing – NASA
Published time: 2 Nov, 2015 19:54
© Deborah Zabarenko / Reuters
Antarctica has been accumulating more ice than it’s been losing in recent decades, a new study by NASA has revealed, challenging existing theories on climate change and rises in sea levels.
The paper, entitled “Mass gains of the Antarctic ice sheet exceed losses,” was published in the Journal of Glaciology on Friday.
The authors of the study, who are from NASA’s Goddard Space Flight Center, the University of Maryland and Sigma Space Corporation, analyzed satellite data showing that Antarctica gained 112 billion tons of ice annually from 1992 to 2001.
There was a slowdown in accumulation from 2003 to 2008, but gains still stood at solid 82 billion tons of ice per year during that period, the paper said.
Lead author and NASA glaciologist Jay Zwally stressed that the results don’t mean that Antarctica will continue gain ice perpetually, as the trend could reverse in just a couple of decades.
The findings of NASA’s survey contradict previous research, including that of the UN’s Intergovernmental Panel on Climate Change (IPCC), which warned that Antarctica’s ice sheets were melting and causing sea levels to rise.
“The good news is that Antarctica is not currently contributing to sea level rise, but is taking 0.23 millimeters per year away,” Jay Zwally, lead author of the paper and NASA glaciologist, said in a press-release.
“But this is also bad news,” he stressed. “If the 0.27 millimeters per year of sea level rise attributed to Antarctica in the IPCC report is not really coming from Antarctica, there must be some other contribution to sea level rise that is not accounted for.”
The scientists calculated the Antarctic ice gains by studying the height of its ice sheet, which was measured using radar instruments on two European Space Agency satellites from 1992 to 2001, and laser sensors on a NASA satellite from 2003 to 2008.
Zwally disagreed with earlier attempts to attribute rises in land elevation in Antarctica to snowfall.
The NASA team analyzed meteorological data from as far back as 1979, which revealed that snow accumulation on the continent has been declining.
This makes thicker ice the logical explanation for Antarctic land elevation, the survey said.
The paper also pointed out the difficulties in measuring the height of ice in Antarctica, saying that improved tools are needed to better perform the task.
The US space agency is currently developing a new satellite capable of a more accurately measuring long-term changes in ice in Antarctica.
ICESat-2, which will be able to “measure changes in the ice sheet within the thickness of a No. 2 pencil,” is planned for launch in 2018, according to NASA glaciologist Tom Neumann.
https://www.rt.com/usa/320554-antarctica-gaining-ice-nasa/
abah ko global warming........ 
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Nah... bolehlah kita membakar... |
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buat penat je menjaga alam sekitar rupanya kita buat apa pun xberi kesan pada alam |
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harapnya suhu bumi menurun semula~~~  |
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Zaman ice age bakal kembali? 
Yay. Bole la yg tak pernah gi oberC merasa salji kat malaysia |
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Zaman ice age bakal kembali?
Yay. Bole la yg tak pernah gi oberC merasa salji kat malaysia |
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actually little bit weird this year,
bulan 11 still dedaun kat pokok, dan cuaca kureng sejuk belum
minus lagi, so cam lain sikit suasana kali ini.. |
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Faraway1 here in Manitoba pun macam tu
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so satu canada kaedahnya, selalu quebec by now, snowflakes dah terbang terbang,
daun kat pokok semua dah hilang, but bukan musim kali ini...
buat lawak juga cam selepas harsh winter last time, so winter kali ini dilewatkan
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Kena buat jejak kasih orang malaysia ni, tak ramai malaysian
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So kiranya ummah boleh la membakar hutan lagi yayyyy..jerebu tuh xfa apa2 sis.tolerable katanyalh. |
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“But this is also bad news,” he stressed. “If the 0.27 millimeters per year of sea level rise attributed to Antarctica in the IPCC report is not really coming from Antarctica, there must be some other contribution to sea level rise that is not accounted for.”
dah tu mai mana peningkatan paras laut tuh? resakser yakjuj dan makjuj bakal bangkit dari laut ka sis? |
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faraway1 replied at 4-11-2015 12:31 AM
actually little bit weird this year,
bulan 11 still dedaun kat pokok, dan cuaca kureng sejuk belum
...
salji akn dtg ke negara yg xkne salji mnurut firasat pemuda bani taming.
tempat ko plak yg kne kemarau.
pole shit kekdahnya |
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@Channel dgn @faraway1 ni buat iols teringat2 kat cikgu geography iols masa form 5 la. terdengar2 dia sebut quebec dgn manitoba. |
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Global warming is a hoax tapi air laut tetap naik mendadak setiap tahun, ni mmg lagi worrying.. |
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ko hengat antartika tu sebesar jamban rumah mak ko ka? dah sah2 la sebuah benua kan
study tu cuma kata ADA berlaku pertambahan ais di antartika, ie salji yg turun lebih byk dr yg mencair
tapi yg berlaku pertambahan ais itu cuma di antartika timur dan jugak ulu banat antartika barat
kwsn2 lain, jika ikut cerapan satelit, kadar pencairan lebih besar dari pertambahan ais
kalu global warming itu satu hoax, apa explanation ttg kadar pencairan yg lebih besar dr penurunan salji kat tempat2 lain tuh?
"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," said Jay Zwally, a glaciologist with NASA Goddard Space Flight Center in Greenbelt, Maryland, and lead author of the study, which was published on Oct. 30 in the Journal of Glaciology. "Our main disagreement is for East Antarctica and the interior of West Antarctica - there, we see an ice gain that exceeds the losses in the other areas." Zwally added that his team "measured small height changes over large areas, as well as the large changes observed over smaller areas."
Scientists calculate how much the ice sheet is growing or shrinking from the changes in surface height that are measured by the satellite altimeters. In locations where the amount of new snowfall accumulating on an ice sheet is not equal to the ice flow downward and outward to the ocean, the surface height changes and the ice-sheet mass grows or shrinks.
But it might only take a few decades for Antarctica's growth to reverse, according to Zwally. "If the losses of the Antarctic Peninsula and parts of West Antarctica continue to increase at the same rate they've been increasing for the last two decades, the losses will catch up with the long-term gain in East Antarctica in 20 or 30 years—I don't think there will be enough snowfall increase to offset these losses."
Read more at: http://phys.org/news/2015-10-mas ... -ice-sheet.html#jCp
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Dia sebut macam mana? 
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aku pernah tengok dokumentari / baca article mana entah .... yang kata ,,,, sebenarnya instead pencairan ais ... sebenarnya pembentukan lebih ais ... kalau tak ditangani .... suhu akan menurun .....drastik menyebabkan zaman ais ... xtau baca/tengok kat mana |
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Quebec mcm mn nak pronounce ye? French word kan? |
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sama la macam kita sebut jgk sis. tapi sbb cikgu ni yang ajar geographi Kanada masa Form 5 .. so dr dia la mostly iols dengar nama2 Quebec, Manitoba, Saskatchewan, Newfoundland, Nova Scotia (ni paling iols suka dengar dia sebut hahaha), New Brunswich, Ontario tu. baca channel tulis manitoba dgn farah tulis quebec ni ... jadi teringat2 cikgu yang ajar geografi kanada la pulak. ya la kita kat malaysia ni kan tak begitu didedahkan dgn berita2 dari canada. balik2 .. US dan Uk .. dan eropah. so nama2 tempat di canada tu mostly masa belajar geografi la kita "hayati". hahhaha
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Post time 3-11-2015 09:14 PM
变色卡
