Decreasing trend of temperature in Princess Elizabeth Land, Antarctica in the past 150 years |
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Authors: | Mingjun Zhang Zhongqin Li Cunde Xiao Jiawen Ren Dahe Qin Jiancheng Kang Jun Li |
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Affiliation: | (1) State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000 Lanzhou, China;(2) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000 Lanzhou, China;(3) Chinese Institute of Polar Research, a200129 Shanghai, China;(4) Antarctic Cooperation Research Center and Australian Antarctic Division, 7001 Hobart, Australia |
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Abstract: | A 50-m firn core drilled in Princess Elizabeth Land, Antarctica, during the 1996/1997 Chinese First Antarctic Inland Expedition, has been measured for δ18O and major ions. Based on the high quality of the seasonal variations of major ions, the firn core was dated with errors within ±3 years. The features of the temperature change in the past 150 years in the investigated region have first been studied based on the oxygen isotope in the upper 32.93 m of the firn core. Results show that the temperature decreased nearly by 2°C in Princess Elizabeth Land in the past 150 years. On the background of the global, especially the Southern Hemispheric warming in the past 150 years, a temperature decline of 2°C in Princess Elizabeth Land likely reflects the impacts of the unique Southern Hemisphere atmospheric circulation, the Antarctic Circumpolar Wave (ACW) and the special terrain (such as the large drainage basins) on the coastal regions of Antarctica. |
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Keywords: | Antarctica firn core decline of temperature |
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