研究论文
孙立广,朱仁斌,谢周清,赵俊琳,徐华.南极法尔兹半岛植被土壤CH4通量特征[J].环境科学学报,2001,21(3):296-300
南极法尔兹半岛植被土壤CH4通量特征
- Characteristics of CH4 flux from vegetal soils on Fildes peninsula, Antarctica
- 基金项目：中科院知识创新工程KZCX2-300项目;国家自然科学基金(40076032)
- 作者
- 单位
- 孙立广
- 中国科技大学极地研究室,合肥 230026
- 朱仁斌
- 中国科技大学极地研究室,合肥 230026
- 谢周清
- 中国科技大学极地研究室,合肥 230026
- 赵俊琳
- 北京师范大学环境科学研究所
- 徐华
- 中国科学院南京土壤研究所
- 摘要：应用密闭箱法首次测定了南极法尔兹半岛苔藓、地衣植被土壤CH4排放通量,并估算了该半岛植被土壤在夏季2个月内CH4的排放总量.结果表明:在晴好天气条件下,苔藓土壤CH4排放通量可能呈现双峰型变化特征;而在雨、雪等复杂多变的天气条件下,CH4通量变化无规则,存在较大的时空变化,且与温度的响应关系不明显;苔藓土壤CH4通量夏季变化的主要影响因子是温度,同时还受降水的影响.苔藓土壤吸收CH4
- Abstract：CH4 fluxes from the vegetal soils were first measured on the Fildes peninsula, Antarctica and total CH4 emission was also estimated in Antarctic austral summer (Jan Mar) The diurnal variations of CH4 fluxes appeared double peaks under the steady weather conditions.CH4 fluxes appeared the great temporal and spatial variations and had not definite corresponding relationships with the air temperatures under the variable unsteady weather conditions The variations of CH4 fluxes were influenced by the air temperature and rainfall in Antarctic summer The total CH4 emissions from moss and lichen soils were -0.6653×102kg and -0.7603×102kg, respectively It follows that the vegetal soils are sinks for the atmospheric CH4 on the Fildes Peninsula Antarctica.
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