甘肃陇东地区季节冻土变化对气候变暖的响应

生态学杂志

甘肃陇东地区季节冻土变化对气候变暖的响应

蒲金涌^1,2;王位泰³;姚小英⁴;王彦凌³

¹中国气象局兰州干旱气象研究所，中国气象局干旱气候变化与减灾重点开放实验室，甘肃省干旱气候变化与减灾重点实验室，兰州 730020；²甘肃省天水农业气象试验站，甘肃天水 741020；³庆阳市气象局，甘肃西峰 745000； ⁴天水市气象局，甘肃天水 741000

收稿日期:2007-12-20 修回日期:1900-01-01 出版日期:2008-09-10 发布日期:2008-09-10

Effects of climate warming on seasonal frozen soil in east Gansu.

PU Jin-yong^1,2;WANG Wei-tai³;YAO Xiao-ying⁴;WANG Yan-ling³

¹Lanzhou Institute of Arid Meteorology, Open Key Laboratory of Arid Cli
mate Change and Reducing Disaster, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Lanzhou 730020, Gansu, China;²Agrometeorological Experimental Station of Tianshui in Gansu Province, Tianshui 741020, Gansu, China; ³Qingyang Meteorological Bureau, Qingyang 745000, Gansu, China; 4Tianshui Meteorological Bureau, Tianshui 745000, Gansu, China

Received:2007-12-20 Revised:1900-01-01 Online:2008-09-10 Published:2008-09-10

摘要/Abstract

摘要： 受气候变暖的影响,季节冻土的冻结、融化及持续时间都发生了较大变化。运用陇东地区8个气象站1971—2005年温度、冻土观测资料，分析了该地气候变化对季节冻土的影响。结果表明：自20世纪70年代以来，该地冬季气温升高了2.7 ℃，30 cm的冻土冻结时间大约推后了10 d，冻土融化时间提前了10 d，冻土持续时间缩短了20 d左右；35年来平均最大冻结深度减少了约20 cm；随着气候的持续变暖，最大冻土深度将进一步减少，预计2050年至少比现在减少15 cm左右，对未来建设工程的设计及施工有较大影响。

关键词: 铜尾矿, 重金属, 污染, 富集, 凤丹

Abstract: Under the effects of climate warming, the freezing, thawing, and their durations of seasonal frozen soil changed greatly. By using the 1971-2005 observation data collected from eight weather stations in east Gansu, the effects of climate change in east Gansu on the seasonal frozen soil of this region were studied. The results showed that since 1970s, the wintertime air temperature of this region raised by 2.7 ℃, freezing and thawing dates of soil in a thickness of 30 cm shifted 10 days later and earlier, respectively, freezing duration shortened by about 20 days, and the maximum frozen depth decreased by about 20 cm. With persistent climate warming, the maximum frozen depth would be decreased continuously, and it was predicted that in 2050, the decrement would be at least about 15 cm, which would have greater effects on the design and construction of engineering.

Key words: Copper tailings yard, Heavy metal, Contamination, Accumulation, Paeonia ostii

蒲金涌;王位泰;姚小英;王彦凌 . 甘肃陇东地区季节冻土变化对气候变暖的响应[J]. 生态学杂志.

PU Jin-yong^1,2;WANG Wei-tai³;YAO Xiao-ying⁴;WANG Yan-ling³. Effects of climate warming on seasonal frozen soil in east Gansu. [J]. cje.

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