• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Regional Carbon Budgets; 20060816-18; Beijing(CN) >Flux and dynamics of CO_2 from forest soil in Beijing mountain area, in temperate zone
【24h】

Flux and dynamics of CO_2 from forest soil in Beijing mountain area, in temperate zone

机译：温带北京山区森林土壤CO_2的通量与动态

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Forest soil is the most important source and sink of greenhouse gas in climate changing. An amount of C storage from soil is more two times as great as that from atmosphere. The amount of C storage from forest soil has occupied 86% of the total C storage from the soil in the world. The CO_2 flux and dynamics from forest soil plays an important role in understanding carbon cycling in terrestrial ecosystem.rnA dynamics of forest soil CO_2 was measured by using alkaline absorption technique in three types of woodland (new plantation, young growth and mature) in Xishan area, Beijing, China. The result shows that an emission flux of CO_2 is related mainly to soil water contents, soil temperature and atmospheric pressure.rnIt is found that there is some diurnal and seasonal variation. In the diurnal variation, the CO_2 flux emission is higher in daytime than that in nighttime. In the seasonal variation, the CO_2 emission flux reaches a summit in early autumn, and falls down the lowest, even woodland soil appearances a CO_2 absorption in winter.rnThe study indicates that the CO_2 emission flux ranges from -341.03 to 1193.59 mg.m~(-2). h~(-1) with the mean of 286 mg.m~(-2). h~(-1) . There is not significant difference among the three woodland types of forest soil in annual mean and seasonal variation.rnBased on the value of annual mean of CO_2 emission flux, it is estimated that 1.7x10~9 t CO_2 annually releases from all of the forest soil in Beijing mountain area.rnA phenomenon of soil absorption CO_2 in the winter is discussed in the study.
机译：森林土壤是气候变化中最重要的温室气体源和汇。来自土壤的碳储存量是来自大气的碳储存量的两倍以上。森林土壤的碳储存量已占世界土壤碳储存总量的86％。森林土壤中的CO_2通量和动态变化对了解陆地生态系统的碳循环起着重要作用。rnn采用碱吸收技术，对西山地区三种林地（人工林，幼林和成年林地）的CO_2动态进行了测量。 ， 中国北京。结果表明，CO_2的排放通量主要与土壤含水量，土壤温度和大气压力有关。rn发现存在一定的昼夜变化。在日变化中，白天的CO_2通量排放量比夜间的高。在季节变化中，CO_2的排放通量在秋季初达到顶峰，降到最低，冬季甚至连林地土壤都吸收CO_2。rn研究表明，CO_2的排放通量范围为-341.03〜1193.59 mg.m〜。 （-2）。 h〜（-1），平均值为286 mg.m〜（-2）。 h〜（-1）三种林地类型的森林土壤的年均值和季节变化没有显着差异。rn基于CO_2排放通量的年均值，估计每年从所有森林土壤中释放出1.7x10〜9t的CO_2该研究探讨了冬季土壤CO_2吸收的现象。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号