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| 湿地生态系统还原性硫气体自然释放研究 |
| Research on Natural Release of Reduced Sulfur Gases from Wetland Ecosystem |
| 投稿时间：2015-04-23 修订日期：2015-06-18 |
| DOI：10.14050/j.cnki.1672-9250.2016.02.013 |
| 中文关键词: 湿地;还原性硫气体;释放 |
| 英文关键词: wetland;reduced sulfur gas;release |
| 基金项目:国家自然科学基金项目(41406089);青岛市民生计划项目(13-1-3-110-nsh);山东省高等学校青年骨干教师国内访问学者项目 |
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| 中文摘要: |
| 还原性硫气体是重要的痕量生源气体,对全球硫循环和大气化学具有重要作用。湿地是还原性硫气体的重要排放源,二甲基硫(DMS)、硫化氢(H2S)、羰基硫(COS)和二硫化碳(CS2)是湿地系统释放明显的还原性硫气体。开展湿地生态系统还原性硫气体自然释放的研究,可在全球尺度上估算还原性硫气体对大气循环的具体贡献提供基础数据。DMS、H2S和CS2的日变化规律表现为昼释放率大于夜释放率,COS释放速率表现为夜大于昼,在季节变化上都呈现生长季释放率大于非生长季;空间释放规律上也有较大差异性,水稻田硫气体释放量较为明显。温度通过影响酶活性进而影响硫气体释放,土壤、植被和潮周期等也是影响湿地生态系统还原性硫气体释放的重要因素。在探讨目前该研究领域存在不足的同时,对未来的研究工作进行了展望,以期对湿地生态系统还原性硫气体释放取得更深入的探究。 |
| 英文摘要: |
| Reduced sulfur gas is an important kind of biogenic trace gases, which is so essential in the atmosphere that it plays a significant role both in the global sulfur cycle and atmospheric chemistry. It has been proved by some scholars that the wetland ecosystem is a critical emission source for reduced sulfur gases. Among all of sulfur-containing gases, dimethyl sulfide(DMS), hydrogen sulfide(H2S), carbonyl sulfide(COS) and carbon disulfide(CS2) are the most obvious reduced sulfur gases released from the wetland system. Research onnatural release of reduced sulfur gases from the wetland system will provide basic data for estimation of their specific contribution in the atmospheric circulation on a global scale. In the law of daily variations, the release rates of DMS, H2S and COS during the daytime are greater than the release rates of the night,but COS is the opposite. Seasonal variations present that the release rates in growing season are greater than those in the non-growing season. There are also big differences between the different reduced sulfur gases in the law of space release. Reduced sulfur gases are usually released from the paddy fields. Temperature influences the activity of enzyme and thus affects the release of sulfur gases. Soil, vegetation and tidal cycle are also important factors influencing the reduced sulfur gases from the wetland ecosystem. |
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