Solar Radiation Measurements on HALO

HALO 上的太阳辐射测量

• 批准号: 178612691
• 负责人: Dr. Birger Bohn
• 金额: --
• 依托单位: Institut für Meteorologie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/178612691?language=en
• 关键词: Solar; Radiation; Measurements; HALO

New instruments for spectral measurements of solar radiation on HALO will be developed and applied in two demonstration missions (OMO, ML-CIRRUS). The target quantities are (i) spectral irradiance which determines the solar radiation budget of the atmosphere, and (ii) spectral actinic flux density which controls atmospheric photochemistry through photo-dissociation processes. Solar spectral radiance from the nadir direction will be measured simultaneously for remote sensing purposes. For the irradiance measurements it is of great importance to accurately distinguish between up-welling and down-welling flux density incident on cosine receivers on top and underneath the airplane. It is therefore planned to apply stabilizing platforms which track the movements of the airplane and correct the position of the receivers with sufficient time response. For the actinic flux density the main challenge is to establish measurements with both high time resolution and high accuracy in the UV-B range by using suitable combinations of spectral monochromators and detectors. This is crucial to quantify ozone photolysis besides other processes. Setup, tests and operations of the instruments will be made by two PhD students requested within this proposal. The measurements will provide (i) spectral cloud radiative forcings and (ii) photolysis frequencies which are essential objectives of the two demonstration missions ML-CIRRUS and OMO and possibly further missions within the application period.

将开发用于测量光晕太阳辐射光谱的新仪器，并在两次示范飞行任务(海洋气象组织、ML-Cirrus)中加以应用。目标量是(I)光谱辐照度，它决定了大气的太阳辐射收支；(Ii)光谱光化通量密度，它通过光解过程控制大气光化学。出于遥感目的，将同时测量来自最低点方向的太阳光谱辐射。对于辐照度测量来说，准确区分入射在飞机顶部和底部余弦接收器上的上涌流和下涌流的通量密度是非常重要的。因此，计划采用稳定平台，跟踪飞机的移动，并以足够的时间响应纠正接收器的位置。对于光化通量密度，主要的挑战是通过使用光谱单色仪和探测器的适当组合，在UV-B范围内建立高时间分辨率和高精度的测量。除了其他过程外，这对于量化臭氧光解是至关重要的。仪器的设置、测试和操作将由本提案中要求的两名博士生进行。这些测量将提供(1)光谱云辐射强迫和(2)光解频率，这是ML-Cirrus和OMO两次示范飞行任务的基本目标，并可能在应用期内进行更多飞行任务。

项目成果

Influence of local surface albedo variability and ice crystal shape on passive remote sensing of thin cirrus

局部地表反照率变化和冰晶形状对薄卷云被动遥感的影响

• DOI: 10.5194/acp-14-1943-2014
• 发表时间: 2014
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: C. Fricke;A. Ehrlich;E. Jäkel;B. Bohn;M. Wirth;M. Wendisch
• 通讯作者: M. Wendisch

The NARVAL Campaign Report

NARVAL 活动报告

• DOI: 10.17617/2.2129055
• 发表时间: 2014
• 作者: C. Klepp

Evidence for an unidentified non-photochemical ground-level source of formaldehyde in the Po Valley with potential implications for ozone production

• DOI: 10.5194/acp-15-1289-2015
• 发表时间: 2015-02
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: J. Kaiser;G. Wolfe;B. Bohn;S. Broch;H. Fuchs;L. Ganzeveld;S. Gomm;R. Häseler;A. Hofzumahaus;F. Holland;J. Jäger;Xin Li;I. Lohse;K. Lu;A. Prévôt;F. Rohrer;R. Wegener;R. Wolf;T. Mentel;A. Kiendler‐Scharr;A. Wahner;F. Keutsch

Missing Gas-Phase Source of HONO Inferred from Zeppelin Measurements in the Troposphere

• DOI: 10.1126/science.1248999
• 发表时间: 2014-04
• 期刊: Science
• 影响因子: 56.9
• 作者: Xin Li;F. Rohrer;A. Hofzumahaus;T. Brauers;R. Häseler;B. Bohn;S. Broch;H. Fuchs;S. Gomm;F. Holland;J. Jäger;J. Kaiser;F. Keutsch;I. Lohse;K. Lu;R. Tillmann;R. Wegener;G. Wolfe;T. Mentel;A. Kiendler‐Scharr;A. Wahner