• Anasayfa
  • Favorilere Ekle
  • Site Haritası

ilkeliyazilar

Hoş geldiniz!

Üyelik Girişi
Site Haritası
Takvim
İgşad Davutov
igdavutov@gmail.com
Arctic warm
18/11/2016

Political people are watching the chaos in the world in the moment. But some people in the science community are watching the chaos somewhere else the Arctic. It’s polar night there now  the sun isn’t rising in much of the Arctic. That’s when the Arctic is supposed to get super-cold, when the sea ice that covers the vast Arctic Ocean is supposed to grow and thicken. But in fall of 2016 — which has been a zany year for the region, with multiple records set for low levels of monthly sea ice — something is totally off. The Arctic is super-hot, even as a vast area of cold polar air has been displaced over Siberia.

At the same time, one of the key indicators of the state of the Arctic — the extent of sea ice covering the polar ocean — is at a record low. The ice is freezing up again, as it always does this time of year after reaching its September low, but it isn’t doing so as rapidly as usual. In fact, the ice’s area is even lower than it was during the record-low 2012:

Zack Labe, a PhD student at the University of California at Irvine who studies the Arctic, showing Arctic temperatures about 20 degrees Celsius higher than normal above 80 degrees North Latitude. This is the second year in a row that temperatures near the North Pole have raised to freakishly warm levels. During 2015’s final days, the temperature near the Pole spiked to the melting point thanks to a massive storm that pumped warm air into the region.

Jennifer Francis, an Arctic specialist at Rutgers University, said that It’s about 20C [36 degrees Fahrenheit] warmer than normal over most of the Arctic Ocean, along with cold anomalies of about the same magnitude over north-central Asia. The Arctic warmth is the result of a combination of record-low sea-ice extent for this time of year, probably very thin ice, and plenty of warm/moist air from lower latitudes being driven northward by a very wavy jet stream. It will be fascinating to see if the stratospheric polar vortex continues to be as weak as it is now, which favors a negative Arctic Oscillation and probably a cold mid/late winter to continue over central and eastern Asia and eastern North America. The extreme behavior of the Arctic in 2016 seems to be in no hurry to quit”. There is strong warm advection into the Arctic, especially northern-central Canada, in through the Atlantic,  and east Siberian/Chukchi Sea. What’s happening, he explains, is sort of a “double whammy.” On the one hand, there is a “very warm underlying ocean” due to the lack of sea ice forming above it. But, at the same time, kinks in the jet stream have allowed warm air to flow northward and frigid Arctic air to descend over Siberia.

 The weather in the Arctic can change swiftly. Temperatures could cool and the ice could rebound. But the record-low sea ice extent and unprecedented warmth in the region fit in well with recent trends and portend even more profound changes in the coming years.



358 kez okundu. Yazarlar

Yorumlar

Henüz yorum yapılmamış. İlk yorumu yapmak için tıklayın

Yazarın diğer yazıları

Coronavirus boggles the mind - 26/11/2020
Coronavirus boggles the mind
Is 2050 too late - 16/09/2019
Is 2050 too late
Extreme Weather Events - 26/12/2017
Extreme Weather Events
Increasing of CO2 - 31/10/2017
Increasing of CO2
Scientists say should be leaved coal as soon as possible - 18/08/2017
Scientists say should be leaved coal as soon as possible
Climate change is a real danger - 15/05/2017
Climate change is a real danger
The warmest february on record - 20/03/2017
The warmest february on record
Climate, Environment and Turism - 13/02/2017
Climate, Environment and Turism
Can we calculate global warming costs? - 13/01/2017
Can we calculate global warming costs?
 Devamı
Döviz Bilgileri
AlışSatış
Dolar15.913815.9775
Euro16.836516.9040
Hava Durumu
Saat