慕士塔格夏季近地表大气CO2浓度变化特征  

Variation of Near-Surface Atmospheric CO-2 Concentration in the Muztag Ata in Summer

作　　者：郑伟[1] 姚檀栋[2] 徐柏青[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室,甘肃兰州730000 [2]中国科学院青藏高原研究所,北京100085

出　　处：《冰川冻土》2005年第2期213-219,共7页Journal of Glaciology and Geocryology

基　　金：中国科学院知识创新工程项目(KZCX3 SW 339;KZCX1 SW 01 10);国家自然科学基金项目(40121101; 40071024)资助

摘　　要：利用CIRAS SC型号的CO2和H2O分析仪, 对东帕米尔高原慕士塔格地区2003年夏季(6~8月)近地表大气CO2浓度和水汽进行精确持续观测, 给出了我国内陆高原大气近地表 CO2 浓度夏季的变化特征. 观测表明, 该地夏季CO2浓度呈整体下降趋势, 并因受陆地植被光合作用、呼吸作用和土壤微生物等的影响, 有明显的日周期变化. 在短时间尺度上, 其变化趋势与瓦里关站点观测结果基本一致, 与Mauna Loa站点观测结果差别明显. 通过考察当地 CO2浓度与大气水汽的关系, 发现两者具有很显著的反相关性. 上述现象揭示, 慕士塔格近地表大气CO2含量的变化不仅受植物光合作用的影响,同时大气中水汽的含量在控制CO2含量方面起着重要作用.By using the CIRAS^SC CO-2 and H-2O analyzer, the precise and continuous measurements of near-surface atmospheric CO-2 concentrations and water vapor were performed in the Muztag Ata, East Pamirs, in summer 2003. This paper presents the variation characteristics of atmospheric CO-2 concentration and water vapor in the inland plateau of China in summer. Observations show a decrease trend of CO-2 concentration and a clear diurnal cycle of CO-2 concentration in summer. In short scale, the variation trend is similar to the observation results in Waliguan Station (Qinghai Province), but there are some difference between Muztag Ata Station and Mauna Loa Station (Hawaii, U.S.A). Significant negative correlation between CO-2 concentration and the atmospheric absolute humidity is also discussed. The above-mentioned phenomena reveal that the variation of near-surface CO-2 concentration in the Muztag Ata is controlled not only by photosynthesis, but also by the content of water vapor in air.

关 键 词：慕士塔格 CO2浓度 变化特征 

分 类 号：P402[天文地球—大气物理学与大气环境]