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可可西里马兰冰芯中δ~(18)O记录表明,该地区近百年来的气温变化与全球气温变化具有相一致的上升趋势,估计自19世纪末以来该地区夏半年(5～10月份)气温的上升幅度约为1.2℃左右。然而,自20世纪70年代末期以来尽管全球明显升温,该冰芯记录却表现出相对降温趋势,认为该冰芯记录所反映的可可西里及青藏高原北部边缘地区的气温变化与北大西洋涛动存在遥相关关系。同时,还发现马兰冰芯记录的气温变化趋势与青藏高原南部地区的气温变化趋势在百年级时间尺度上是一致的,而在多年代际时间尺度上存在反相关关系。
The δ ~ (18) O records in the Malan ice core of Hoh Xil show that the temperature changes in the past 100 years have a consistent upward trend with the global temperature change, and the temperature in the summer half year (May ~ October) in the region since the end of the 19th century The rate of increase is about 1.2 ℃. However, since the late 1970s, despite the marked global warming, the ice core record shows a relative cooling trend. It is believed that the temperature changes of the Hoh Xil and the northern edge of the Qinghai-Tibet Plateau reflected by the ice core record are remote from the North Atlantic Oscillation relationship. At the same time, it is also found that the temperature trend recorded by Malan ice core and the temperature trend in the southern part of the Qinghai-Tibet Plateau coincide with the centennial time scale, while the anti-correlation exists on the interdecadal time scale.