毛发
发表于 2025-3-21 18:05:36
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Glossy
发表于 2025-3-21 23:11:31
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建筑师
发表于 2025-3-22 03:49:48
Observations from Ground Level, what is involved in this scattering. It has become clear that noctilucent clouds are very thin and very sparse assemblies of scatterers. The cloud particles, whatever they may be, scatter light as individuals not as an assembly. Furthermore, there is a negligible amount of rescattering in the cloud
faction
发表于 2025-3-22 07:45:37
Spectrophotometry, and there are no obvious emission lines. The relative spectral distribution in the scattered light differs from that of sunlight and, in principle, this difference can be measured and used to estimate the size of the scattering particles. In practice, this is neither easy to do nor exact in applica
vertebrate
发表于 2025-3-22 11:47:10
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CHASM
发表于 2025-3-22 14:14:30
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军械库
发表于 2025-3-22 19:52:29
Other Observations,m outbreaks of solar activity. In determining the cause of noctilucent clouds, we can use both the regular emission of light (airglow) for diagnosis and the sporadic disturbances (aurorae) as tests of prognosis.
headlong
发表于 2025-3-22 23:39:42
Environment of Noctilucent Clouds,of clouds are formed. The physical processes of importance in discussing noctilucent clouds are correspondingly changed in importance. First, the mean free path in the region is much larger than the particle size in the cloud and the physical conditions are those of the Knudsen regime rather than th
MELD
发表于 2025-3-23 01:35:52
The Nature of Noctilucent Clouds, length. From the very start of the period, hypotheses have been formed and, to the extent practical, tested. Quite naturally, because noctilucent clouds came to notice with the increased awareness of twilight sky phenomena following the Krakatoa eruption, the earliest suggestions were that noctiluc
杀虫剂
发表于 2025-3-23 06:58:15
on dioxide released during its use is an integral part of the carbon cycle. Increasing the share of biomass in the energy supply contributes to diminishing the environmental impact of CO. and to meeting the targets established in the Kyoto Protocol. The use of biomass waste material as a fuel, howev