Intercomparison of atmospheric water vapour measurements in theCanadian high Arctic
Intercomparison of atmospheric water vapour measurements in theCanadian high Arctic
复制标题
加拿大高纬度北极地区大气水汽测量值的相互比较
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Daniel A. Heredia
中科院分区：
文献类型：
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作者：
Edwin J. González López;Yohana B. Palacios;Sol R. Martinez;Andrés M. Durantini;Edgardo N. Durantini;Gustavo A. Abraham;Silvestre Bongiovanni Abel;Daniel A. Heredia
水蒸气是地球系统的重要组成部分。目前正在积极开发获取和改进大气水蒸气及其同位素测量的技术。这项工作提供了2006年至2014年在加拿大北极高纬度研究地点进行的水蒸气总柱测量的详细相互比较。仪器包括无线电探空仪、太阳光度计、微波辐射计、发射和太阳吸收傅里叶变换光谱仪。在所有数据集组合之间观察到良好的一致性，相关系数≥ 0.90，显示出高相关性。各种偏见和校准问题的揭示和讨论的所有仪器。一个新的FTS数据集，从MUSICA（多平台遥感同位素研究大气水循环）检索技术，提供准确的测量水蒸气总柱，然而，测量显示出约6%的小湿偏差。来自大气辐射干涉仪（AERI）测量的新数据集也显示出提供准确的水蒸气测量，这有助于在白天和夜晚进行测量（在极夜期间特别有价值）。此外，还利用无线电探空仪和地基FTS测量进行了有限的剖面比较。结果表明，MUSICA FTS廓线在整个对流层的无线电探空仪测量值的15%以内。
Water vapour is a critical component of the Earth system. Techniques to acquire and improve measurements of atmospheric water vapour and its isotopes are under active development. This work presents a detailed intercomparison of water vapour total column measurements taken between 2006 and 2014 at a Canadian high Arctic research site. Instruments include radiosondes, sun photometers, a microwave radiometer, and emission and solar absorption Fourier transform spectrometers (FTSs). Good agreement is observed between all combination of datasets, with correlation coefficients ≥ 0.90 showing high correlations. A variety of biases and calibration issues are revealed and discussed for all instruments. A new FTS dataset, resulting from the MUSICA (Multi-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water) retrieval technique, is shown to offer accurate measurements of water vapour total columns; however, measurements show a small wet bias of approximately 6 %. A new dataset derived from Atmospheric Emitted Radiance Interferometer (AERI) measurements is also shown to provide accurate water vapour measurements, which usefully enables measurements to be taken during day and night (especially valuable during Polar Night). In addition, limited profile comparisons are conducted using radiosonde and ground-based FTS measurements. Results show MUSICA FTS profiles were within 15 % of radiosonde measurements throughout the troposphere.