Investigating the diurnal variability of trace gases in the TROpical West PACific measured by solar absorption spectrometry in the infrared (TROPAC)

通过红外太阳吸收光谱法 (TROPAC) 调查热带西太平洋微量气体的日变化

基本信息

项目摘要

The ocean in the West Pacific with temperatures of 30°C year-round is the warmest ocean worldwide. In the tropical West Pacific the boundary layer air temperature is highest globally and overhead ozone lowest. Due to the general low and mid-tropospheric advection from the east by the Walker circulation across the Pacific, air above the tropical West Pacific has been in a clean, warm and humid environment for a long time.Thus, the loss of odd oxygen and ozone precursors like NOx proceeded longer than elsewhere in the tropics, leading to very low ozone concentrations. This increases the lifetimes of short-lived biogenic and anthropogenic chemical species. Furthermore, high sea surface temperatures favor strong convective activity in the tropical West Pacific, which can lead to low ozone mixing ratios in the convective outflow regions in the upper troposphere. The West Pacific warm pool is also a major source region for stratospheric air. Hence, the region where the lifetimes of short lives species is increased and the source region of stratospheric air are coincident. Thus, the composition of the tropospheric atmosphere in this region determines the global stratospheric composition to a large extent.Ozone is an important trace gas for the climate assessment because of feedback processes among changing temperature, dynamics and ozone. Since the West Pacific warm pool is the major source region for stratospheric air, the knowledge of ozone and other shorter lived trace gases is also important to understand the transport of trace gases into the stratosphere. The aim of our project is to measure the diurnal variability of ozone and other trace gases using the high resolution solar absorption FTIR-spectrometry. The measurements yield the total columns densities of up to 20 trace gases. For a few trace gases, like O3, the analysis of the spectral line shape allows to retrieve the concentration profiles in up to about 4 atmospheric height layers. The observations will be complemented by ozone balloon sondes, continuous measurements of the UV-radiation, and modelling activities using a chemistry transport model. The observations are planned for August to October 2022, the analysis and interpretation from November 2022 until January 2023.
西太平洋的海洋全年温度为30摄氏度,是世界上最温暖的海洋。在热带西太平洋,边界层气温是全球最高的,头顶臭氧最低。由于横跨太平洋的Walker环流一般从东到中对流层平流,热带西太平洋上空的空气长期处于清洁、温暖和潮湿的环境中,因此,奇怪的氧气和臭氧前体(如NOx)的损失持续了比热带其他地区更长的时间,导致臭氧浓度很低。这延长了短命的生物和人为化学物种的寿命。此外,高海面温度有利于热带西太平洋的强对流活动,这可能导致对流层高层对流流出区的低臭氧混合率。西太平洋暖池也是平流层空气的主要来源区域。因此,短寿命物种寿命增加的区域与平流层空气的源区是一致的。因此,该地区对流层大气的组成在很大程度上决定了全球平流层的组成。臭氧是气候评估的重要示踪气体,因为变化的温度、动力学和臭氧之间存在反馈过程。由于西太平洋暖池是平流层空气的主要来源区域,有关臭氧和其他寿命较短的微量气体的知识对于了解微量气体向平流层的输送也很重要。我们项目的目的是使用高分辨率的太阳吸收FTIR光谱来测量臭氧和其他痕量气体的日变化。测量得到多达20个痕量气体的总柱密度。对于少数痕量气体,如臭氧,对谱线形状的分析允许反演多达4个大气高度层的浓度分布。这些观测将得到臭氧气球探测仪、紫外线辐射的连续测量以及使用化学传输模型模拟活动的补充。观测计划在2022年8月至10月,分析和解释从2022年11月到2023年1月。

项目成果

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Professor Dr. Justus Notholt其他文献

Professor Dr. Justus Notholt的其他文献

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{{ truncateString('Professor Dr. Justus Notholt', 18)}}的其他基金

Modelling atmospheric effects of electrical discharges
模拟放电的大气效应
  • 批准号:
    496872622
  • 财政年份:
    2022
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Investigating the atmospheric composition from the 1950s on using historical solar absorption infrared spectra
使用历史太阳吸收红外光谱研究 20 世纪 50 年代的大气成分
  • 批准号:
    421869546
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Studying dissolved organic carbon in tropical rivers of Malaysia using in-situ and satellite observations
利用现场和卫星观测研究马来西亚热带河流中的溶解有机碳
  • 批准号:
    407264719
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Model studies on vibrationally-rotationally excited hydroxyl molecules in the mesosphere and rotational temperatures
中间层振动旋转激发羟基分子和旋转温度的模型研究
  • 批准号:
    392888112
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Sabbatical for six months at the JRC in Ispra/Italy for (1) measurement of NH3 and other trace gases in the atmosphere in a region with very variable and high NH3 values (2) to intensify the cooperation with the JRC
在意大利伊斯普拉的 JRC 休假六个月,目的是 (1) 在 NH3 值变化很大且高的地区测量大气中的 NH3 和其他痕量气体 (2) 加强与 JRC 的合作
  • 批准号:
    287116743
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Ground-based remote sensing measurements of CO2 and CH4 using the moon as light source during the polar night
极夜期间以月球为光源的CO2和CH4地面遥感测量
  • 批准号:
    196775932
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Implications of energetic particle precipitation events for the temperature and dynamics of the atmosphere - a model study
高能粒子降水事件对大气温度和动力学的影响——模型研究
  • 批准号:
    182650365
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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心脏自主功能、认知表现和神经认知结果
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HIV、睡眠、夜间非浸渍和心血管疾病:坦桑尼亚队列
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心脏自主功能、认知表现和神经认知结果
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Psychological stress, and circadian patterns of sodium excretion and blood pressure
心理压力、钠排泄和血压的昼夜节律模式
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Effect of methodological and biological variability on molecular profiling of extracellular vesicles in cancer detection
方法学和生物学变异对癌症检测中细胞外囊泡分子谱的影响
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Intraseasonal variability and its impacts to the diurnal cycle over the monsoonal Asia
亚洲季风区的季节内变化及其对昼夜循环的影响
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