The limitations of standard atmosphere mode in describing the characteristics of middle atmosphere are discussed.

分析了标准大气模式在描述中层大气温度分布平均特性和变化规律上的局限。

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The powerful eruption sent plumes of ash streaming over North Africa and the Middle East, and pumped vast quantities of sulfur dioxide into the atmosphere.

火山喷发致使大量的二氧化硫也排放到大气中，大量烟尘覆盖了非洲北部及中东部地区。

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They discussed the importance of creating an atmosphere for peace in the Middle East and agreed to follow up in the near future on a broad range of issues of mutual interests.

WHITEHOUSE: Press Briefing

One of these satellites, CloudSat, has given the first glimpses of the middle layer of clouds in the Earth's atmosphere.

ECONOMIST: Climatology

Since April 2006, CloudSat's radar has, however, been providing a globe-circling slice of the middle layer, a previously unobserved part of the atmosphere.

ECONOMIST: Climatology: Grey-sky thinking | The