官方的原因变得如此热可乐钻孔吗?- 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 - 11 - t12:36:24z //www.hoelymoley.com/feeds/question/20378 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/20378 4 官方的原因变得如此热可乐钻孔吗? 不懂世故的人 //www.hoelymoley.com/users/21276 2020 - 10 - 24 - t06:11:52z 2021 - 09 - 23 - t01:25:34z < p >可乐钻了“只”第三个地幔,所以它的最深点仍接近表面比地幔。钻孔机体验180°C时,为什么如此之深,热量是从哪里来的?逻辑上我期望它会冷越深你进入地壳地幔(直到大约还有一半我猜,温度又开始上升),不热。< / p > //www.hoelymoley.com/questions/20378/-/20379 # 20379 9 弗雷德回答的是什么官方的原因变得那么可乐钻孔热? 弗雷德 //www.hoelymoley.com/users/2470 2020 - 10 - 24 - t09:11:36z 2020 - 10 - 24 - t09:11:36z < p >不幸的是,你的直觉地下地面温度是不正确的。< / p > < p >地下室、地窖做提供冷却条件储存易腐物品,因为近地表岩石对表面热绝缘。< / p > < p >去更深的但是和温度增加。在地球表面附近,在地壳内,从构造边界,温度升高,由于< a href = " https://en.wikipedia.org/wiki/Geothermal_gradient " rel = " noreferrer " > < / >地热梯度是25 - 30°C /公里。深度的地温梯度增加。< / p > < p > < a href = " https://i.stack.imgur.com/EXH1X.jpg " rel = " noreferrer " > < img src = " https://i.stack.imgur.com/EXH1X.jpg " alt = "在这里输入图像描述" / > < / > < / p > < p >的大部分热量是由于自然放射性元素的衰变,大多是在地幔。< / p > < blockquote > < p >热量流动在地球表面不断地从它的来源。从地球上总热损失估计44.2太瓦。< / p > < /引用> //www.hoelymoley.com/questions/20378/-/20428 # 20428 2 Bruzote回答的是什么官方的原因变得那么可乐钻孔热? Bruzote //www.hoelymoley.com/users/7800 2020 - 11 - 03 - t04:45:36z 2020 - 11 - 03 - t04:52:46z < p >当前最受欢迎的答案完全没有提及你的假设是不可能的,因为它会违反热力学定律,因此我将提供自己的答案。< / p > < p >提问者,你的假设是,会有一个地下最低温度,表面和深层地球变暖。However, this "heat sandwich" cannot exist as it violate some pretty basic principles about energy transfer (thermodynamics).

As you may know, when warmer matter is exposed to cooler matter, heat will conduct from the warmer matter to the cooler matter. This is in accordance with the 2nd law of Thermodynamics. So, the cool part of the "heat sandwich" would immediately start to warm up as it absorbed heat from the layers above it and below it. It would not be "in thermal equilibrium" with the other layers and eventually it would disappear. So, were you thinking there is a TEMPORARILY cool layer in the sandwich or were you thinking it has been there since the Earth formed? I assure you, based on heat conduction physics, any cool layer within the Earth would have warmed up long ago during the 4-1/2 BILLION years that the planet has existed. So, your assumption could only be right if the layer was recently put there. Is there a way that you propose to create a cool subterranean layer where none had existed?

The ONLY way that cool layer could be created (or persist from the beginning of the Earth) is if it was somehow able to convert thermal energy into another form of energy. Thus, heat coming in from the outer layers of the sandwich (from above and below) would have to be continually converted into another form of energy (such as a change of chemistry or phase of matter). This process would technically not violate the law of conservation of energy, and it would still be a "sink" of heat energy. It would allow your cool layer to persist. HOWEVER...

There is basically no such massive heat sink down where you thought this cool layer exists. So, unless you knew there was a subterranean cooling system in place, your own assumption of a cool layer was just that - an assumption without a robust physical basis. Did you have some reason to assume there was a subterranean cool layer in the Earth? Maybe you're thinking of how on a warm spring summer day, an excavator can dig into the Earth and expose some cool soil. If so, those temperature variations change daily and seasonally, but they don't show up in subterranean rock 100 feet below the soil.

It is a fact that every exposed part of the planet fluctuates in temperature. So, on a microscale, when the surface warms, then technically there is a cooler layer below. However, that layer is temporary and will not be that deep. The surface can change temperature quickly due to effects of light radiation (heating), loss of heat due to infrared radiation (after sundown), evaporation or condensation of dew or frost, or conduction into any air or water that is contacting the surface. (FWIW, convection is not such a surface heat transfer mechanism, as it can only transport heat within a mobile phase of matter, not at the fixed soil interface.)

There is one more mechanism affecting soil and even some rock temperatures, and that is the transport of heat energy (positive OR negative) due to the flow of liquid within the soil or rock. For example, cold rain water draining into a subterranean river can cool th rock it passed through. Still, in general, the Earth's surface typically changes temperature very slowly over time once you get roughly 10-50 feet down, depending on where you are and how much water is percolating through. The temperature profile below that depth remains steady, heating up as you go deeper.

By the way, the reason the Earth is so warm in the interior, after having 4-1/2 billion years to cool off since it's formation, is that uranium in the Earth is decaying. This atomic decay releases heat. The atomic energy release is basically the same mechanism as in a nuclear fission reactor, but the reactions are going MUCH more slowly. Since the core of the Earth probably has extremely little uranium, that means the Earth's core is not generating heat through fission. However, core of the earth keeps as warm as it nowhere to LOSE its heat. (Technically, there are a couple of relatively very minor heat sources and sinks in the core, but I won't raise address them here.)

Here is a graph of how soil and rock temperatures might change at a site:

graph of how soil and rock temperatures might change at a site.

(source: https://www.builditsolar.com/Projects/Cooling/EarthTemperatures.htm)

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