Gravitational separation in the stratosphere – a new indicator of atmospheric circulation

doi:10.5194/acp-13-8787-2013

GSTDTAP > 地球科学

DOI	10.5194/acp-13-8787-2013
	Gravitational separation in the stratosphere – a new indicator of atmospheric circulation
	S. Ishidoya, S. Sugawara, S. Morimoto, S. Aoki, T. Nakazawa, H. Honda, and S. Murayama
	2013-09-03
发表期刊	Atmospheric Chemistry and Physics
出版年	2013
英文摘要	As a basic understanding of the dynamics of the atmospheric circulation, it has been believed that gravitational separation of atmospheric components is observable only in the atmosphere above the turbopause. However, we found, from our high-precision measurements of not only the isotopic ratios of N₂, O₂ and Ar but also the mole fraction of Ar, that gravitational separation occurs even in the stratosphere below the turbopause; their observed vertical profiles are in good agreement with those expected theoretically from molecular mass differences. The O₂/N₂ ratio observed in the middle stratosphere, corrected for gravitational separation, showed the same mean air age as estimated from the CO₂ mole fraction. Simulations with a 2-dimensional model of the middle atmosphere indicated that a relationship between gravitational separation and the age of air in the stratosphere would be significantly affected if the Brewer–Dobson circulation was enhanced due to global warming. Therefore, gravitational separation is usable as a new indicator of changes in the atmospheric circulation in the stratosphere.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/288029
专题	地球科学
推荐引用方式 GB/T 7714	S. Ishidoya, S. Sugawara, S. Morimoto, S. Aoki, T. Nakazawa, H. Honda, and S. Murayama. Gravitational separation in the stratosphere – a new indicator of atmospheric circulation[J]. Atmospheric Chemistry and Physics,2013.
APA	S. Ishidoya, S. Sugawara, S. Morimoto, S. Aoki, T. Nakazawa, H. Honda, and S. Murayama.(2013).Gravitational separation in the stratosphere – a new indicator of atmospheric circulation.Atmospheric Chemistry and Physics.
MLA	S. Ishidoya, S. Sugawara, S. Morimoto, S. Aoki, T. Nakazawa, H. Honda, and S. Murayama."Gravitational separation in the stratosphere – a new indicator of atmospheric circulation".Atmospheric Chemistry and Physics (2013).