适用于多年冻土区具有碳通量自动观测性能的OTC系统开发设计

发布时间：2018-04-25 05:21

本文选题：多年冻土区 + 模拟增温　；参考：《冰川冻土》2015年02期

【摘要】：在现有的OTC内碳通量观测仪器设备基础上,设计开发出一套以AT89S51单片机为控制核心,通过L293D控制电机正反转控制箱盖定时开关,实现了多年冻土区OTC内碳通量自动观测.观测主体箱用透明采光性良好的玻璃纤维材料制成,电机传动采用齿轮传动,箱口和箱盖接触地方用橡胶密封圈包裹,防止箱盖密闭时漏气.OTC内碳通量自动观测仪最大可能性的减小了当前模拟增温条件下碳通量观测受自然条件和人为因素的影响,极大的降低观测费用,提高了数据的连续性,基本上实现了多年冻土区模拟增温条件下碳通量较为精确地自动、连续观测.试验表明:在气象条件相对较好的2013年5月15日,OTC内碳通量自动观测仪观测结果和传统OTC内利用LI-COR6400观测结果规律性都较强,野点较少,二者相关性显著(R2=0.96);而在气象条件相对较差的2013年9月1日,OTC内碳通量自动观测仪观测结果受外界干扰小,观测结果规律性强,野点较少;而传统OTC内利用LI-COR6400观测结果规律性较差,野点较多,数据可信度不高,二者观测结果相关性不显著(R2=0.67).
[Abstract]:Based on the existing OTC internal carbon flux observation instrument, a set of automatic carbon flux observation in permafrost region OTC is realized by using L293D to control the timing switch of the positive and reverse rotating control box cover of the motor, based on the AT89S51 single chip computer as the control core. The main body box is made of glass fiber material with good transparency and daylighting, the motor drive is gear-driven, and the contact place between the box opening and the cover is wrapped with rubber sealing ring. The maximum possibility of the automatic observation instrument of carbon flux in OTC, which can prevent the leakage of air when the lid is closed, reduces the carbon flux observation under the current simulated warming condition by natural conditions and human factors, greatly reduces the observation cost and improves the continuity of data. The carbon fluxes in permafrost regions can be observed accurately and automatically under simulated warming conditions. The experimental results show that there are strong regularity and few outliers in the observation of carbon flux in OTC on May 15, 2013, and in the conventional OTC, where the meteorological conditions are relatively good. The correlation between them is significant (R2 ~ (2 +) 0.96), while in the OTC on September 1, 2013, the observed results of the OTC are less disturbed by the outside world, the observed results are more regular and the outliers are less. However, in traditional OTC, the observed results by using LI-COR6400 are of poor regularity, many outliers and low reliability. The correlation between the two observations is not significant (R _ 2N _ (0.67)).
【作者单位】：中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室;中国科学院寒区旱区环境与工程研究所青藏高原北麓河冻土工程与环境综合观测研究站;
【基金】：中国科学院寒区旱区环境与工程研究所青年人才基金项目(Y251B81001) 国家重点基础研究发展计划(973计划)项目(2010CB951402)资助
【分类号】：P642.14

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