太阳加热地球如何?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 04 - 14 - t01:13:19z //www.hoelymoley.com/feeds/question/4498 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/4498 9 太阳加热地球如何? PCmedia //www.hoelymoley.com/users/2644 2015 - 03 - 08 - t07:22:43z 2017 - 05 - 06 - t04:33:13z 李< ol > < >太阳核心的温度为15000000°C。李李< / > < >太阳表面的温度在5000°C。李李< / > < >太阳离地球大约9300万英里(1.5亿公里)。李< / > < / ol > < p > <强>我的问题:< / >强表面5000°C,太阳如何提供热量,地球9300万英里(1.5亿公里)以外? < / p > //www.hoelymoley.com/questions/4498/-/4501 # 4501 18 答案由user889太阳加热地球如何? user889 //www.hoelymoley.com/users/0 2015 - 03 - 08 - t21:52:58z 2015 - 03 - 08 - t22:15:53z < p >这是一个问题的辐射发射——太阳表面的温度大约是5500°C(根据< a href = " http://earthobservatory.nasa.gov/Features/EnergyBalance/ " rel = " nofollow noreferrer " > NASA地球天文台< / >),在这个温度下,它发出的辐射紫外线,可见光和近红外区,由于热对象,辐射发射波长越小,可以看到下面的普遍形象(NASA): < / p > < p > < img src = " https://i.stack.imgur.com/2P6Dl.png " alt = "在这里输入图像描述" > < / p > < p > < em >注意:地球的温度显示是一个approximattion黑体的温度,解释这个问题的答案< a href = " //www.hoelymoley.com/questions/825/what-would-be-the-temperature-of-earth-if-there-was-no-atmosphere " >什么是地球如果没有大气的温度? < / > < / em >。< / p > < p >实际上,< / p > < p > < img src = " https://i.stack.imgur.com/U9azk.png " alt = "在这里输入图像描述" > < / p > < p > < em >来源:< a href = " http://en.wikipedia.org/wiki/Sunlight " rel = " nofollow noreferrer " >维基百科< / > < / em > < / p > < p >不是所有这些辐射到达地球大气层到达水面,比例是大气反射和吸收大气中(如图所示,图中黄色和红色之间的差异),但一个好的比例到达地球表面。< / p >

But that is not the entire picture, we receive this 'shortwave' radiation from the Sun:

enter image description here

Which is also balanced by an equal amount of energy radiating into space as 'longwave' thermal infrared radiation:

enter image description here

(Both images from NASA Earth Observatory)

Which leads to a major point - we have an atmosphere and a natural 'greenhouse effect' due to the water vapour and carbon dioxide (and other components) that are seen in the above solar radiation spectrum diagram.

Some of the thermal infrared is absorbed by the atmosphere and re-radiated back to the surface. This radiation budget is shown below:

enter image description here

Source: NASA

Something to consider, looking at the value the NASA has for the incoming radiation reaching the Earth's surface - 168 Wm-2 - imagine that being a 168 watt light globes for every square metre - that value increases markedly when the re-radiated thermal infrared is taken into account.

Also, please view the YouTube clip How the Sun Heats the Earth which is a handy verbal and diagrammatic explanation of the content of this answer.

 //www.hoelymoley.com/questions/4498/-/6735 # 6735 2 答案由f。索普太阳加热地球如何? f.thorpe //www.hoelymoley.com/users/543 2015 - 10 - 15 - t22:22:29z 2015 - 10 - 15 - t22:22:29z < p >大气的温暖,你觉得在你的皮肤上。从地球表面大气变暖。来自太阳的可见光击中地球表面和其中的一些被吸收,导致地球表面变暖,这是再次辐射红外线,然后我们的大气层所覆盖。没有大气,地球表面的温度就更冷,更戏剧性的昼夜循环。< / p >
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