The decadal-scale variation of solar Lyman-α and its effects on NLC occurrence rate, NLC brightness and the mesospheric water vapor
The decadal-scale variation of solar Lyman-α and its effects on NLC occurrence rate, NLC brightness and the mesospheric water vapor
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太阳Lyman-α的年代际变化及其对NLC发生率、NLC亮度和中层水汽的影响
DOI：
10.1127/0941-2948/2006/0121
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发表时间：
2006
影响因子：
1.2
通讯作者：
U. Berger
中科院分区：
文献类型：
--
作者：
U. von Zahn;U. Berger
最近对中间层水汽和NLC体积后向散射系数的三维模拟表明，这两个参数受太阳Lyman-{α}通量变化的影响比迄今所假设的要小得多。对NLC季节平均反照率的长期卫星观测支持了NLC亮度对太阳Lyman-{alpha}通量变化的响应减弱的发现。同时，观测到的NLC平均亮度在一个太阳周期内的变化（通过SBUV和激光雷达实验）比假设Lyman-{alpha}对H{sub 2}O的光解作用是NLC变化的唯一来源所模拟的要大一些。这就需要在NLC参数中寻找其他的可变性来源。(源自)。
Recent 3-D modelling of water vapor in the mesosphere and of NLC volume backscatter coefficient has shown that both parameters are much less influenced by changes in solar Lyman-{alpha} flux than hitherto assumed. Long-term satellite observations of seasonally averaged NLC albedo support the finding of a reduced response of NLC brightness to changes in solar Lyman-{alpha} flux. At the same time, the observed variation of average NLC brightness (by SBUV and lidar experiments) throughout a solar cycle is somewhat larger than modelled under the assumption that photodissociation of H{sub 2}O by Lyman-{alpha} is the sole source for the NLC variation. This necessitates to search for additional sources of variability in NLC parameter. (orig.)