Height Determination of a Blue Discharge Observed by ASIM/MMIA on the International Space Station
Height Determination of a Blue Discharge Observed by ASIM/MMIA on the International Space Station
复制标题
DOI：
10.1029/2022jd037460
复制
发表时间：
2023-03
期刊：
影响因子：
--
通讯作者：
Xue Bai;M. Füllekrug;O. Chanrion;S. Soula;A. Peverell;D. Mashao;M. Kosch;L. Husbjerg;N. Østgaard;T. Neubert;V. Reglero
中科院分区：
文献类型：
--
作者：
Xue Bai;M. Füllekrug;O. Chanrion;S. Soula;A. Peverell;D. Mashao;M. Kosch;L. Husbjerg;N. Østgaard;T. Neubert;V. Reglero
我们分析了2019年2月3日世界协调时23：00-23：05国际空间站上大气-空间相互作用监测器(ASIM)模块多光谱成像阵列对雷云放电的同时光度观测和地面垂直电场测量。在此期间，ASIM飞越了数百公里长的雷暴锋面，并用光度计在337 nm处记录到一次蓝色放电，发出了强烈的电场。结果表明，蓝光倍增管光脉冲的上升沿可以估算出蓝光放电高度：∼10.9-16.5公里，这是由静止气象卫星上的红外辐射推算出的∼13.3-16.7公里范围内的云顶高度所制约的。通过电场测量，利用天波到达时间推算出蓝光放电的高度为∼16.0-18.8公里。结果表明，在测量不确定度范围内，高程测量结果是一致的，并讨论了云顶过冲的可能性。蓝色辐射的高度对于更好地了解它们如何影响对流层上层的化学物质很重要。
We analyze simultaneous photometric observations of thundercloud discharges from the Modular Multispectral Imaging Array of the Atmosphere‐Space Interactions Monitor (ASIM) on board the International Space Station with ground‐based vertical electric field measurements in South Africa on 3 February 2019 at 23:00–23:05 UTC. During this time, ASIM flew over an extended thunderstorm front of several hundreds of kilometers and recorded a blue discharge with the photometer at 337 nm which emitted strong electric fields. It is found that the rising edge of the blue photomultiplier tube light pulse allows the estimation of the blue discharge height: ∼10.9–16.5 km which is constrained by cloud top height in a range of ∼13.3–16.7 km deduced from infrared radiometry on board the geostationary Meteosat satellite. The electric field measurements are used to infer the height of the blue discharge to be ∼16.0–18.8 km by use of skywave arrival times. It is shown that the height determinations are consistent with each other within the measurement uncertainties and the possible presence of an overshooting cloud top is discussed. The height of blue discharges is important to better understand how they can affect the chemistry in the upper troposphere.