Temperatures during the Arctic winter of 2006 stayed fairly close to the long-term average until late January, with minimum readings frequently cold enough to produce PSCs. During the last week of January, however, a major warming event sent temperatures well above normal — much too warm to support PSCs. By the time temperatures dropped back to near normal in March, the seasonal norm was well above the PSC threshold. Preliminary satellite instrument-generated ozone maps show seasonal ozone buildup slightly below the long-term means for the Northern Hemisphere as a whole, although some high ozone events have occurred. During March 2006, the Arctic stratosphere poleward of 60 degrees North Latitude was free of anomalously low ozone areas except during the three-day period from 17 March to 19 when the total ozone cover fell below 300 DU over part of the North Atlantic region from Greenland to Scandinavia.
The area where total column ozone is less than 220 DU (the accepted definition of the boundary of the ozone hole) was relatively small until around 20 August 2006. Since then the ozone hole area increased rapidly, peaking at 29 million km2 24 September. In October 2006, NASA reported that the year's ozone hole set a new area record with a daily average of 26 million km2 between 7 September and 13 October 2006; total ozone thicknesses fell as low as 85 DU on 8 October. The two factors combined, 2006 sees the worst level of depletion in recorded ozone history. The depletion is attributed to the temperatures above the Antarctic reaching the lowest recording since comprehensive records began in 1979.
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2006年極地圈的冬天到一月尾為止溫度大致上都維持在固定的範圍, 最低溫常常冷到產生PSCs. 但是在一月的最後一個禮拜有個急遽的暖化現象—暖到沒有辦法繼續支持PSCs. 在溫度回到常溫的三月前氣候已經遠遠的超過PSC的可承受的極限 從衛星臭氧圖可以看出季節性的臭氧些微減少對北半球整體而言,就好像有了某種嚴重的臭氧事件一樣 2006年三月17到19日間北緯六十度極地格陵蘭島(丹麥屬地greenland)和斯勘第納維亞島(Scandinavia)的平流層臭氧濃度降到了低於300DU
臭氧濃度低於220DU(臭氧洞的標準)再2006年八月前都還很小 2006年8月後臭氧洞的範圍快速擴張,九月的時候到達了巔峰—29百萬 (兩千九百萬)平方公里
2006年十月 NASA宣佈那年的臭氧破洞又創新高— 在九月七號和十月十三號間日平均兩千六百萬 整體臭氧濃度最低還在十月八日降到85DU