It suggests that the meridional circulation has a marked influence on the route of stationary waves propagation in Winter and Summer Hemisphere.

这表明经圈环流对冬、夏半球的定常波传播路径有着显著的影响。

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In the Southern hemisphere winter has begun, and it is summer north of the equator.

在南半球，冬天已经开始，赤道以北是夏天。

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We are close to a knowledge of annual summer and winter temperature variations over much of the northern hemisphere going back 600 years.

我们很快就会知道，600年前北半球大部分地区每年夏季和冬季的温度是如何变化的。

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Yet some sea ice in the Arctic melts each year during summer in the Northern Hemisphere.

VOA: special.2009.10.27

During summer the Northern Hemisphere is tilted towards the Sun so we get longer days and warmer weather.

BBC: Why the Moon is getting further away from Earth

About 200 people had been enjoying the beach during the Southern Hemisphere summer at the time of the attack.

NPR: Loved Ones Salute New Zealand Dad Killed By Shark

Expeditions run during the Southern Hemisphere summer, from approximately November to April.

CNN: Embrace ice: 8 cool getaways