1991～2000年中国森林火灾直接释放碳量估算

目前的研究表明生物圈的燃烧产物对大气有短期和长期的影响,植被燃烧会直接排放对环境有显著影响的气体,包括CO2和CH4等影响全球变化的温室气体,燃烧产生的固体颗粒物也会引起空气污染和影响天气。该文根据1991～2000的森林火灾统计数据和生物量研究结果,计算出我国森林火灾年均消耗森林地上生物量5Tg～7Tg,直接排放碳20.24Tg～28.56Tg,释放CO2和CH4分别为74.2Tg～104.7Tg和1.797Tg～2.536Tg,排放烟雾颗粒物0.999Tg～1.410Tg。1991～2000年森林火灾每年平均排放CO2量占我国总排放量(按2000年计算)的2.7～3.9%,CH4排放量占总排放量的3.3～4.7%。

居民聚居区再不能这样做

最近回家,在嘉峪关二十一间房区暂住了几十天,所见所闻,心里颇不一宁静。 二十一间房是居民聚居区,占地面积约二万五千平方米以上,且还在扩建。住宅房成排组布局,每两长排有一道路穿过。排组间布局合理,防火间距绰绰有余,不幸的是间距内堆放有纸张、木材、塑料等可燃易燃物。每当换液化气瓶的时候,少数人将气瓶倒置于公路边上,从喷嘴喷出的液化气残液。

Characteristics of Seismic Sequences and Early Tendency Judgment for Yutian M_S7.3 Earthquake in 2014

The basic parameters,seismogenic structure and seismic sequences characteristics of the Yutian MS7. 3 earthquake on February 12,2014 are introduced and compared to the Yutian MS7. 3 earthquake in 2008. The results show that the MS5. 4 earthquake is regarded as an immediate foreshock of the Yutian MS7. 3 main shock. The frequency of strong aftershock sequences was low and their number declined quickly,and the maximum aftershock was a MS5. 7 earthquake. According to analysis of the historical earthquake sequence type,and parameter of h-value,b-value and energy release ratio between main shock and sequence etc.,we found the preliminary conclusion that the Yutian MS7. 3 earthquake sequence in 2014 was a foreshock-main shock-aftershock type.

液态CO_2直接灌注防灭火技术研究及应用

本文采用理论分析和井下现场应用的对策,对小型的液态CO_2储存槽的研究与制造、在深井中直接施放液状CO_2的具体工艺及其直接释放安全技术措施,形成了一套较为完善的预防和处理煤层自燃发火的应急技术和措施。