Cold water may be upwelled or may be advected into the winter hemisphere.

冷水可以涌开或者可以平流到冬半球。

youdao

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。

youdao

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。

youdao

Winter conditions are affecting many countries in Earth's northern hemisphere.

VOA: special.2010.02.02

For those of us in the northern hemisphere, Monday is the first day of Winter, which seems a good time to check out a website that's all about the snow.

VOA: standard.2009.12.19

U.S.officials worry that, even if the virus' spread is eventually contained, it could re-emerge months from now during the northern hemisphere's winter flu season, when more than 30,000 Americans die each year from common influenza.

VOA: standard.2009.05.03

It is the first time it has been confirmed where the animals travel to for the northern hemisphere winter.

BBC: Donegal shark travels 3,000 miles to coast of Africa

However in winter the Northern Hemisphere is tilted away from the Sun giving us shorter days and cooler weather.

BBC: Why the Moon is getting further away from Earth

Instead he and his partner are resigned to spending a third southern hemisphere winter in the poorly insulated camper, venturing into the sagging house to use the toilet.

NPR: 2 Years On, Slow Quake Recovery In New Zealand