The Heidelberg Airborne Imaging DOAS Instrument (HAIDI) – a novel imaging DOAS device for 2-D and 3-D imaging of trace gases and aerosols
The Heidelberg Airborne Imaging DOAS Instrument (HAIDI) – a novel imaging DOAS device for 2-D and 3-D imaging of trace gases and aerosols
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DOI：
10.5194/amt-7-3459-2014
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发表时间：
2014-10
影响因子：
3.8
通讯作者：
S. General;D. Pöhler;H. Sihler;N. Bobrowski;U. Friess;J. Zielcke;Martin Horbanski;P. Shepson;B. Stirm;W. Simpson;K. Weber;C. Fischer;U. Platt
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文献类型：
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作者：
S. General;D. Pöhler;H. Sihler;N. Bobrowski;U. Friess;J. Zielcke;Martin Horbanski;P. Shepson;B. Stirm;W. Simpson;K. Weber;C. Fischer;U. Platt
摘要。对流层化学的许多相关过程发生在相当小的尺度上（例如，几十至几百米），但往往影响几平方公里的区域。因此，以高空间分辨率测量所涉及的微量气体具有重大的科学意义。为了识别单个源和汇并最终改进化学传输模型，我们开发了一种新的机载仪器，该仪器基于已建立的差分光学吸收光谱（DOAS）方法。海德堡航空成像DOAS仪（HAIDI）是一种被动成像DOAS光谱仪，能够记录水平和垂直微量气体分布，分辨率优于100 m。观测到的物质包括NO2、HCHO、C2H2O2、H2O、O3、O4、SO2、IO、OClO和BrO。在这里，我们给出了仪器的技术描述，包括其定制的光谱仪和CCD探测器。本文还介绍了新仪器的初步测量结果。其中包括在埃特纳火山（意大利西西里岛）绘制的火山柱中空间分辨的二氧化硫和二氧化氮，在印第安纳波利斯（美国印第安纳州）的大都市地区的二氧化氮排放，以及在2012年在巴罗（美国阿拉斯加州）进行的溴、臭氧和汞实验（BROMEX）活动背景下在北极春季测量的二氧化氮和二氧化氮分布。
Abstract. Many relevant processes in tropospheric chemistry take place on rather small scales (e.g., tens to hundreds of meters) but often influence areas of several square kilometer. Thus, measurements of the involved trace gases with high spatial resolution are of great scientific interest. In order to identify individual sources and sinks and ultimately to improve chemical transport models, we developed a new airborne instrument, which is based on the well established Differential Optical Absorption Spectroscopy (DOAS) method. The Heidelberg Airborne Imaging DOAS Instrument (HAIDI) is a passive imaging DOAS spectrometer, which is capable of recording horizontal and vertical trace gas distributions with a resolution of better than 100 m. Observable species include NO2, HCHO, C2H2O2, H2O, O3, O4, SO2, IO, OClO and BrO. Here we give a technical description of the instrument including its custom-built spectrographs and CCD detectors. Also first results from measurements with the new instrument are presented. These comprise spatial resolved SO2 and BrO in volcanic plumes, mapped at Mt. Etna (Sicily, Italy), NO2 emissions in the metropolitan area of Indianapolis (Indiana, USA) as well as BrO and NO2 distributions measured during arctic springtime in context of the BRomine, Ozone, and Mercury EXperiment (BROMEX) campaign, which was performed 2012 in Barrow (Alaska, USA).