安光所在宽带腔增强吸收光谱技术及农田HONO排放通量研究方面取得重要进展
发布时间:2018-12-25 作者:秦敏、唐科

近期,安光所谢品华研究员课题组在宽带腔增强吸收光谱技术及农田HONO排放通量研究方面取得重要进展相关研究成果A dual dynamic chamber system based on IBBCEAS for measuring fluxes of nitrous acid in agricultural fields in the North China Plain为题发表在国际刊物Atmospheric Environment2019, 196:10-19 

HONO由于在大气中所扮演的重要角色如:OH自由基的前体物以及对臭氧和光化学烟雾形成的促进作用而引起科学界的广泛关注。近年来大量研究结果显示,HONO对于OH自由基贡献不单单表现在清晨,甚至全天都有重要意义OH自由基初始来源的贡献在50%(夏季)~80%(冬季)。考虑HONO已知源汇通过模式计算得到的模拟值和实际外场观测值差异较大,尤其是白天的HONO浓度,未知源强达到0.06-5ppbv h-1,但对于具体的来源途径,存在着较大争议。 

课题组秦敏副研究员、唐科等人在国际上首次将动态箱法结合IBBCEAS技术应用于农田HONO排放通量测量,观测结果相比文献中报道的外场结果高一个数量级,揭示了华北平原施肥土壤具有很强的HONO排放潜势首次通过外场证实土壤HONO排放而区别于其来源。Atmospheric Environment两位审稿专家对研究工作给予了很高的评价,认为“这是一项用于研究土壤HONO排放构思巧妙的工作。首次通过外场观测证实土壤HONO排放而区别于其来源。实验设计合理,可靠。动态箱实验结果很好,为今后的研究工作提供了依据” (This is a very well-designed study focusing on the investigation of soil HONO emissions. …… To my knowledge, this is the first field controlled studies that is able to distinguish soil emissions from other kind of sources. The experiments were well designed and sound. The authors were also honestly discussing potential caveats. The chamber results were excellent, providing a basis for further studies in the future. I highly recommend its publication in AE)、“这篇文章在本刊涉及的学科范围内对相关研究工作的科学创新起到了有趣且有意义的作用”In general, this manuscript presents an interesting and useful contribution to scientific progress within the scope of this journal 

该研究工作得到国家自然科学基金重大研究计划培育项目(NO. 41330424国家自然科学基金国际(地区合作与交流(中英)项目NO. 41571130023资助。 

文章链接:https://doi.org/10.1016/j.atmosenv.2018.09.059 

  外场观测周围环境 

 动态箱系统结构 

与文献观测到的HONO通量的比较