一种快速便捷的温室气体本底浓度采样方法初探

引入生态和气象研究领域的本底大气观测技术,提出一种便捷快速的温室气体本底浓度采样方法。该方法需要的设备简单,便于携带,能够快速完成采样。2011年5—7月,利用该方法,自西向东分别在处于我国三大阶梯的青藏高原东北缘、秦巴山区、长江中下游平原,选择不同类型的土地覆盖下垫面开展了地面采样实验,获得了33组以CO2和CH4为主的温室气体浓度数据。根据获得的采样结果,分别开展了人工采样数据分析及其与器测本底数据、卫星反演同期数据产品的对比分析,结果显示,几类数据趋势相符,数值相对偏差较低。总体认为,该方法获得的采样数据可靠、采样效率高,且成本低廉,这在我国温室气体自动监测站还比较少的现实情况下,不失为一种可选的快速便捷监测技术手段。

Study on a Rapid and Easy Observation Approach for Background Greenhouse Gas Concentration

There are very limited numbers of background greenhouse gas observation stations distributed unevenly in China. Facing to this problem, referencing the background atmosphere observation technology in meteorology and ecology research field, a rapid and easy background greenhouse gas concentration observation approach was proposed and designed. This method needs very few portable observation equipments, and has high efficiency in field sampling process. From May to July in 2011, this method was experimented for background greenhouse gas observation in 3 regions from north-west to south-east in China. These regions include north east of Qinghai-Tibet plateau area, Qinba mountain area in central China, middle and low reaches of Yangze river area. Totally, 33 couple observation value are collected in these regions. 3 kinds of contrast methods are used for field observation value analysis. Firstly, artificial observed value is compared with automatic monitoring value. Secondly, artificial observed value is compared with retrieved data from AIRS sensor in EOS Aqua satellite. Thirdly, artificial observed data are analyzed through the comparing among 3 regions. Through the comparing mentioned above, it can be found initially that this rapid and easy method is one of good selections for greenhouse gas observation in the area where hasn't enough automatic and operational greenhouse gas observation stations.