长江口崇明东滩潮间带温室气体排放初步研究  

Elementary research on green-house gas emissions in Chongming east intertidal flat of the Changjiang Estuary

作　　者：杨红霞[1] 王东启[1] 陈振楼[1] 许世远[1] 

机构地区：[1]华东师范大学资源与环境科学学院地理信息科学教育部重点实验室,上海200062

出　　处：《海洋环境科学》2006年第4期20-23,共4页Marine Environmental Science

基　　金：国家自然科学基金重点项目(40131020);国家自然科学基金项目(40173030);上海市基础研究重点项目(02DJ14029);上海市科委重大项目(04DZ19301);教育部优秀青年教师资助计划

摘　　要：采用原位静态箱法对长江口崇明东滩(CM)湿地3种主要温室气体CO2,CH4和N2O的排放、吸收通量进行现场测定。结果表明,春季(5月)崇明东滩湿地是大气CH4的排放源。中潮滩暗箱(CM-2b)CH4的排放通量为394.22μg/m2.h,明箱(CM-2w)为492.58μg/m2.h;低潮滩暗箱(CM-3b)CH4的排放通量为84.89μg/m2.h,明箱(CM-3w)为76.16μg/m2.h,植被和有机质含量的不同是造成中、低潮滩CH4通量差异的主要因素。中潮滩春季草的光和作用可以降低CO2和N2O的排放,明箱内表现为对CO2(-67.45 mg/m2.h)和N2O(-21.79μg/m2.h)的吸收,同时呼吸作用增加了潮滩-大气界面CO2和N2O的排放(CO2,730.27 mg/m2.h;N2O,109.72μg/m2.h)。而低潮滩(CM-3)表现为CO2和N2O的汇,但吸收的通量值较小。Using static closed chamber technique, the emission and uptake fluxes of three primary green-house gases（CO2,CH4 and N2O） were measured on the spot in the Chongming east intertidal flat（CM）. The results showed that CH4 was the source in CM into the atmosphere in Spring（May）. In the middle intertidal flat（CM-2）, the flux of CH4 was 394.22μg/m^2 · h in the black box （CM-2b） and 492.58 μg/m^2·h in the white bex（CM-2w）, the vegetation and organic matter content are the important factors influencing the emission of Ch4 between CM-2 and CM-3. In CM-2, the photosynthesis of plant can decrease the emission of CO2 and N2O in Spring. It showed the uptake of CO2（-67.45 mg/m^2·h） and N2o （-21.79 μg/m……2·h） in GM-2w, at the same the respiration increase the emission of CO2 and N2O in the tidal flat-atmosphere interface（CO2,730.27 mg/m^2 · h; N2O, 109.72 μg/m^2· h^1 ） . While the low tidal flat （CM-3） is the sink of CO2 and N2O, but the flux value is small.

关 键 词：潮间带 湿地 温室气体 排放 

分 类 号：P734.2[天文地球—海洋化学] X142[天文地球—海洋科学]