Using the GOES Sounder to monitor upper level SO2 from volcanic eruptions
Using the GOES Sounder to monitor upper level SO2 from volcanic eruptions
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DOI：
10.1029/2007jd009622
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发表时间：
2008-07
影响因子：
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通讯作者：
S. Ackerman;A. J. Schreiner;T. Schmit;H. Woolf;Jun Li;M. Pavolonis
中科院分区：
文献类型：
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作者：
S. Ackerman;A. J. Schreiner;T. Schmit;H. Woolf;Jun Li;M. Pavolonis
[1]本研究探讨了地球静止运行环境卫星（GOES）探空观测对火山喷发大气so2负荷的敏感性。GOES探测仪提供了比极地轨道卫星上的类似仪器更快的刷新率，例如NOAA和MetOp航天器上携带的高分辨率红外辐射探测仪（HIRS）。GOES探测仪的19个通道中有一个处于二氧化硫吸收波段。模拟表明，这个以7.4毫米为中心的通道与其他通道相结合，可以探测到上层大气（例如，8公里以上）中存在大量so2（例如，大于50 DU）。如果已知so2的大气高度，GOES探测仪还可以提供上层so2含量的上限。这种敏感性在蒙特塞拉特岛上苏弗里埃尔山火山的两次火山喷发中得到了证明。通过使用GOES测深仪的测量，可以很容易地观察到平流和羽流的快速扩散。由于目前GOES探测仪有限的空间覆盖范围，对羽流大小和运输进行全面表征的努力受到了阻碍。
[1] This study explores the sensitivity of the Geostationary Operational Environmental Satellite (GOES) Sounder observations to atmospheric loadings of SO 2 .from volcanic eruptions. The GOES Sounder offers a more rapid refresh rate than similar instruments on board polar-orbiting satellites, such as the High-Resolution Infrared Radiation Sounder (HIRS) carried on the NOAA and MetOp spacecraft. One of the GOES Sounder's 19 channels is in an SO 2 absorption band. Simulations demonstrate that this channel, centered at approximately 7.4 mm, when combined with other channels, can detect the presence of large amounts of SO 2 (e.g., greater than 50 DU) in the upper atmosphere (e.g., above 8 km). The GOES Sounder can also provide upper limits of the amount of upper level SO 2 , provided the atmospheric altitude of the SO 2 is known. The sensitivity is demonstrated on two volcanic eruptions of the Soufriere Hills Volcano on the island of Montserrat. Through use of the GOES Sounder measurements, the advection and rapid spreading of the plume are easily observed. Efforts to fully characterize the plume size and transport are hampered by the limited spatial coverage of the current GOES Sounder.