Intercomparison of stratospheric ozone profiles for the assessment of the upgraded GROMOS radiometer at Bern
Intercomparison of stratospheric ozone profiles for the assessment of the upgraded GROMOS radiometer at Bern
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平流层臭氧剖面对比，用于评估伯尔尼升级后的 GROMOS 辐射计
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
N. Kämpfer
中科院分区：
文献类型：
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作者：
S. Studer;K. Hocke;M. Pastel;S. Godin‐Beekmann;N. Kämpfer
自1994年11月以来，地面毫米波臭氧光谱仪（GROMOS）在瑞士伯尔尼（47.95°N, 7.44°E）测量平流层和中下层臭氧。GROMOS是大气成分变化探测网络（NDACC）的一部分。2009年7月，一个快速傅立叶变换光谱仪（FFTS）被添加到GROMOS后端。新的FFTS和原来的滤波台架（FB）并行测量了两年多。2011年10月，FB被关闭，FFTS现在被用来继续臭氧时间序列。对于ndac框架内的统一臭氧时间序列，必须评估FFTS获得的平流层臭氧剖面的质量。将2009年7月至2011年12月的FFTS结果与FB检索到的臭氧剖面图进行比较。GROMOS微波辐射计的FFTS和FB在20 hPa以上的5%以内一致。将FFTS作为FB的基准来实现两个时间序列的后续协调。FFTS的臭氧剖面也与法国上普罗旺斯天文台（OHP）的激光雷达测量结果进行了比较。在研究的时间段内，lidar - GROMOS FFTS在3.1 hPa处的最大平均差值为+3.8%，在8 hPa处的最小平均差值为+1.4%。此外，与其他独立仪器的臭氧剖面进行了相互比较：卫星测量包括ENVISAT上的MIPAS， TIMED上的SABER， EOS Aura上的MLS和SCISAT-1上的ACE-FTS。此外，从瑞士Payerne发射的臭氧探测仪用于平流层下层。在50 ~ 0.1 hPa之间，GROMOS FFTS与这些独立仪器的平均相对差异小于10%。
Since November 1994, the GROund-based Millimeter-wave Ozone Spectrometer (GROMOS) measures stratospheric and lower mesospheric ozone in Bern, Switzerland (47.95° N, 7.44° E). GROMOS is part of the Network for the Detection of Atmospheric Composition Change (NDACC). In July 2009, a Fast-Fourier-Transform spectrometer (FFTS) has been added as backend to GROMOS. The new FFTS and the original filter bench (FB) measured parallel for over two years. In October 2011, the FB has been turned off and the FFTS is now used to continue the ozone time series. For a consolidated ozone time series in the frame of NDACC, the quality of the stratospheric ozone profiles obtained with the FFTS has to be assessed. The FFTS results from July 2009 to December 2011 are compared to ozone profiles retrieved by the FB. FFTS and FB of the GROMOS microwave radiometer agree within 5% above 20 hPa. A later harmonization of both time series will be realized by taking the FFTS as benchmark for the FB. Ozone profiles from the FFTS are also compared to coinciding lidar measurements from the Observatoire Haute Provence (OHP), France. For the time period studied a maximum mean difference (lidar – GROMOS FFTS) of +3.8% at 3.1 hPa and a minimum mean difference of +1.4% at 8 hPa is found. Further, intercomparisons with ozone profiles from other independent instruments are performed: satellite measurements include MIPAS onboard ENVISAT, SABER onboard TIMED, MLS onboard EOS Aura and ACE-FTS onboard SCISAT-1. Additionally, ozonesondes launched from Payerne, Switzerland, are used in the lower stratosphere. Mean relative differences of GROMOS FFTS and these independent instruments are less than 10% between 50 and 0.1 hPa.