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arXiv 1001.0776astro-ph.HEphysics.ao-ph
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由IceCube观测的大气变化

Atmospheric Variations as observed by IceCube

Serap Tilav, Paolo Desiati, Takao Kuwabara, Dominick Rocco, Florian Rothmaier, Matt Simmons, Henrike Wissing

摘要:

我们已经测量了冰立方中的速率与南极大气的长期和短期变化的相关性。平流层中部(30-60 hPa)的年平均温度变化与冰深处观测到的高能μ子率有很好的相关性,并引起μ子率的+/-10%的季节调制。表面探测器的计数率是由能量相对较低的次级粒子(μ子、电子和光子)引起的,与平流层较低层(40-80 hPa)的温度呈负相关,并在+/-5%的水平上进行调制。在20-120百帕压力之间的大气层区域是南极臭氧层,在那里发生第一次宇宙射线相互作用,产生的π介子/K介子相互作用或衰变为μ介子。表层和深层冰触发率之间的关系反映了平流层臭氧层密度变化时π/K介子衰变和相互作用的性质。因此,冰立方密切探测臭氧洞动态和平流层温度的时间行为。

英文摘要:

We have measured the correlation of rates in IceCube with long and short term variations in the South Pole atmosphere. The yearly temperature variation in the middle stratosphere (30-60 hPa) is highly correlated with the high energy muon rate observed deep in the ice, and causes a +/-10% seasonal modulation in the event rate. The counting rates of the surface detectors, which are due to secondary particles of relatively low energy (muons, electrons and photons), have a negative correlation with temperatures in the lower layers of the stratosphere (40-80 hPa), and are modulated at a level of +/-5%. The region of the atmosphere between pressure levels 20-120 hPa, where the first cosmic ray interactions occur and the produced pions/kaons interact or decay to muons, is the Antarctic ozone layer. The anticorrelation between surface and deep ice trigger rates reflects the properties of pion/kaon decay and interaction as the density of the stratospheric ozone layer changes. Therefore, IceCube closely probes the ozone hole dynamics, and the temporal behavior of the stratospheric temperatures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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