Temperature variation and its driving forces over the Antarctic coastal regions in the past 250 years |
| |
Authors: | ZHANG Mingjun REN Jiawen CHENG Guodong LI Zhongqin XIAO Cunde QIN Dahe KANG Jiancheng LI Jun |
| |
Institution: | 1. College of Geography and Environment, Northwest Normal University, Lanzhou 730070,China;Cold and Arid Regions Environmental and Engineering Research Institute,CAS, LanZhou 730000,China 2. Cold and Arid Regions Environmental and Engineering Research Institute,CAS, LanZhou 730000,China 3. Chinese Institute of Polar Research, Shanghai 200129, China 4. Antarctic Cooperation Research Center and Australian Antarctic Division, Hobart 7001,Australia |
| |
Abstract: | By comparing the oxygen isotopic temperatures recorded by many shallow ice cores from the coastal regions of Antarctica, this
paper presents the special characteristics of the temperature variations over the Antarctic coastal regions in the past 50
years, 150 years and 250 years. In the past 50 years, the isotopic temperatures recorded in the ice cores over different sites
on the Antarctic coastal regions differ greatly. For instance, although increasing isotopic temperatures have been reported
for many sites studied, many sites show decreasing trends, the regional regularity in temperature variations is still insignificant.
In the past 150 years, the isotopic temperature trends in the coastal regions of Antarctica show an alternate-distributing
pattern. In the past 250 years, all the ice cores from the coastal regions of Antarctica have recorded the so-called Little
Ice Age (LIA). The above-mentioned spatial characteristics of the temperature variations over the Antarctic coastal regions
are likely to reflect 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. Furthermore, the impacting
intensity of the unique Southern Hemisphere atmospheric circulation, the Antarctic Circumpolar Wave and the special terrain
differs in terms of the temporal scale of the temperature change. |
| |
Keywords: | Antarctica ice core temperature terrain Antarctic Circumpolar Wave (ACW) circumpolar circulation |
本文献已被 万方数据 SpringerLink 等数据库收录! |
| 点击此处可从《地理学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《地理学报(英文版)》下载免费的PDF全文 |
|