用于直接测量平流层溴的新型气球载紫外可见光谱仪

IF 3.2 3区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

Atmospheric Measurement Techniques Pub Date : 2024-07-29 DOI:10.5194/amt-17-4507-2024

Karolin Voss, Philip Holzbeck, Klaus Pfeilsticker, Ralph Kleinschek, Gerald Wetzel, Blanca Fuentes Andrade, Michael Höpfner, Jörn Ungermann, Björn-Martin Sinnhuber, André Butz

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引用次数: 0

摘要

摘要。我们报告了一种新型、中等重量（25 千克）的光学光谱仪，该光谱仪与自动太阳跟踪器相结合，可从重约 12 千克的方位角控制气球平台上直接观测太阳。它的设计目的是利用差分光学吸收光谱（DOAS）方法测量一套与平流层臭氧消耗有关的紫外可见吸收气体，即 O3、NO2、BrO、OClO、HONO 和 IO。在此，我们将介绍该仪器的设计和主要特点。此外，我们还讨论了该仪器在 2021 年 8 月 21 日从瑞典基律纳附近的 Esrange 和 2022 年 8 月 23 日从加拿大安大略省蒂明斯进行的两次平流层部署中的性能，以及气球漂浮高度以上 BrO 混合比的首次推断结果。利用化学传输模拟获得的平流层溴分配（[BrO]/[Bry]）的光化学校正，推断出的平流层溴总负荷[Bry]为 (17.5 ± 2.2) ppt，在 (5.5 ± 1.0) 年的空气中，纯统计误差为 1.5 ppt。后者是通过 GLORIA（Gimballed Limb Observer for Radiance Imaging of the Atmosphere）中红外仪器对一氧化二氮的同步测量推断出来的，结果显示所调查的气团进入平流层的时间为 2017 年初 ± 1 年。

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A novel, balloon-borne UV–Vis spectrometer for direct sun measurements of stratospheric bromine

Abstract. We report on a novel, medium-weight (∼ 25 kg) optical spectrometer coupled to an automated sun tracker for direct sun observations from azimuth-controlled balloon platforms weighing approximately 12 kg. It is designed to measure a suite of UV–Vis absorbing gases relevant in the context of stratospheric ozone depletion using the differential optical absorption spectroscopy (DOAS) method, i.e. O3, NO2, BrO, OClO, HONO, and IO. Here, we describe the design and major features of the instrument. Further, the instrument's performance during two stratospheric deployments from Esrange near Kiruna (Sweden) on 21 August 2021 and from Timmins (Ontario, Canada) on 23 August 2022 is discussed along with the first results concerning inferred mixing ratios of BrO above balloon float altitude. Using a photochemical correction for the partitioning of stratospheric bromine ([BrO]/[Bry]) obtained by chemical transport simulations, the inferred total stratospheric bromine load [Bry] amounts to (17.5 ± 2.2) ppt, with a purely statistical error amounting to 1.5 ppt in (5.5 ± 1.0)-year old air. The latter is inferred from simultaneous measurements of N2O by the GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) mid-IR instrument, resulting in a stratospheric entry of the investigated air mass in early 2017 ± 1 year.

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来源期刊

Atmospheric Measurement Techniques METEOROLOGY & ATMOSPHERIC SCIENCES-

CiteScore

7.10

自引率

18.40%

发文量

331

审稿时长

3 months

期刊介绍： Atmospheric Measurement Techniques (AMT) is an international scientific journal dedicated to the publication and discussion of advances in remote sensing, in-situ and laboratory measurement techniques for the constituents and properties of the Earth’s atmosphere. The main subject areas comprise the development, intercomparison and validation of measurement instruments and techniques of data processing and information retrieval for gases, aerosols, and clouds. The manuscript types considered for peer-reviewed publication are research articles, review articles, and commentaries.