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1979. The scientists concluded that given the lack of evidence that natural forces were controlling sea ice fluctuations, the majority of sea ice decline we've seen during the 1953 2010 period was due to human causes.
Paradise Valley (Potter Marsh). . 75 mph
Upper Hillside (1400 ft). . . . 70 mph
Figure 3. August set a new record for lowest Arctic sea ice extent. Image credit: National Snow and Ice Data Center.
coast of Alaska on August 5 and tracked into the center of the Arctic Ocean, where it slowly dissipated over the next several days. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite captured this natural color mosaic image on Aug. 6, 2012. The center of the storm at that date was located in the middle of the Arctic Ocean. Image credit: NASA.
McHugh Creek (Turnagain Arm). . .88 mph
The monster Arctic storms like we've seen this year have sped up the rate of sea ice loss, but increased water temperatures and air temperatures due to human caused global warming are the dominant Polo Shirts Embroidered Sydney
reasons for the record melting of the Arctic sea ice. A July 2012 study by Day et al. found that the most influential of the possible natural influences on sea ice loss was the Atlantic Multi decadal Oscillation (AMO). The AMO has two phases, negative (cold) and positive (warm), which impact Arctic sea ice. The negative phase tends to create sea surface temperatures in the far north Atlantic that are colder than average. In this study, the AMO only accounted for 5% 31% of the observed September sea ice decline since Mens Polo Shirts On Sale At Macy's
Half of the polar ice cap is missing: Arctic sea ice hits a new record low
Beautiful orographic formations over the mountains on a windy evening.
Arctic storms may be increasing due to climate change
A massive low pressure system with a central pressure of 970 mb swept through Alaska on Tuesday, generating hurricane force wind gusts near Anchorage, Alaska that knocked out power to 55,000 homes. Mighty Alaskan storms like this are common in winter, but rare in summer and early fall. The National Weather Service in Anchorage said in their Wednesday forecast discussion that the forecast wind speeds from this storm were incredibly strong for this time of year four to six standard anomalies above normal. A four standard anomaly event occurs once every 43 years, and a five standard anomaly event is a 1 in 4800 year event. However, a meteorologist I heard from who lives in the Anchorage area characterized the wind damage that actually occurred as a 1 in 10 year event. A few maximum wind gusts recorded on Tuesday during the storm:
Arctic sea ice is an important component of the global climate system. The polar ice caps help to regulate global temperature by reflecting sunlight back into space. White snow and ice at the poles reflects sunlight, but dark ocean absorbs it. Replacing bright sea ice with dark ocean is a recipe for more and faster global warming. The Autumn air temperature over the Arctic has increased by 4 6F in the past decade, and we could already be seeing the impacts of this warming in the mid latitudes, by an increase in extreme weather events. Another non trivial impact of the absence of sea ice is increased melting in Greenland. We already saw an unprecedented melting event in Greenland this year, and as warming continues, the likelihood of these events increase.
Huge storm pummels Alaska
A sea ice decline double whammy
Why the Arctic sea ice is important
Angela Fritz and Jeff Masters
Figure 5. An unusually strong storm formed off the Fred Perry Grey Polo Shirt
This week's Alaskan storm is the second unusually strong low pressure system to affect the Arctic in the past month. On August 4 8, a mighty storm with a central pressure of 963 mb raged through the Arctic, bringing strong winds that helped scatter and break up Arctic sea ice. According to a detailed post at NASA Earth Observatory, that storm was in the top 3 percent for strongest storms ever recorded north of 70 degrees latitude. Dr. Zhang explained that climate change has caused sea ice to retreat markedly in Lacoste Long Sleeve Polo White recent decades and has also warmed Arctic Ocean temperatures. Such changes may be providing more energy and moisture to support cyclone development and persistence. The strong storms of this week and a month ago would have had far less impact on the ice just a decade ago, when the sea ice was much thicker and more extensive.
Extraordinary melting of sea ice in the Arctic this summer has shattered the all time low sea ice extent record set in September 2007, and sea ice continues to decline far below what has ever been observed. The new sea ice record was set on August 26, a full three weeks before the usual end of the melting season, according to the National Snow and Ice Data Center. Every major scientific institution that tracks Arctic sea ice agrees that new records for low ice area, extent, and volume have been set. These organizations include the University of Washington Polar Science Center (a new record for low ice volume), the Nansen Environmental Remote Sensing Center in Norway, and the University of Illinois Cryosphere Today. A comprehensive collection of sea ice graphs shows the full story. Satellite records of sea ice extent date back to 1979, though a 2011 study by Kinnard et al. The ice continues to melt, and has not reached the low for this year yet.
Figure 4. Arctic sea ice death spiral as plotted by Jim Pettit using data from the Japan Aerospace Exploration Agency.
Extraordinary melting of sea ice in the Arctic this summer has shattered the all time low sea ice extent record set in September 2007, and sea ice continues to decline far below what has ever been observed. The new sea ice record was set on August 26, a full three weeks before the usual end of the melting season, according to the National Snow and Ice Data Center. Every major scientific institution that tracks Arctic sea ice agrees that new records for low ice area,.
Figure 2. Sea ice extent on September 5, 2012, showed that half of the polar ice cap was missing, compared to the average from 1979 2000. Image credit: National Snow and Ice Data Center.
Categories:Sea Ice Climate Change
Anchorage port. . . . . . . .63 mph
The storm has weakened to a central pressure of 988 mb today, and is located just north of Alaska. The storm is predicted to bring strong winds of 25 35 mph and large waves to the edge of the record thin and record small Arctic ice cap, and may add to the unprecedented decline in Arctic sea ice being observed this summer.
Arctic sea ice hits a new record low
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