海平面上升由于气候变化,地球科学堆栈交换江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 06 - t23:22:29z //www.hoelymoley.com/feeds/question/9163 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/9163 9 海平面上升是由于气候变化 Kronimiciad //www.hoelymoley.com/users/7018 2016 - 11 - 21 - t04:02:21z 2017 - 01 - 12 t01:52:07z < p >我一直试图理解围绕海平面上升的论点,而不是很远。< / p > < p >那些声称海平面上升是微不足道的通常断言,我们无法统计链接温室气体浓度上升,海平面上升。我认为这是不正确的,但是我没有的知识来分析,没有听说过这种说法驳斥了。< / p >

I would like to know whether Sea Level Rise is linked to Greenhouse Gas emissions and what the mechanisms are behind it.

//www.hoelymoley.com/questions/9163/-/9165 # 9165 6 答案由userLTK海平面上升由于气候变化 userLTK //www.hoelymoley.com/users/2717 2016 - 11 - 21 - t13:07:53z 2016 - 11 - 21 - t13:07:53z < p >这是一个困难表明似乎直接关系。表面上,温暖=少冰,文件在“咄”,虽然它可能就是这么简单,显示因果关系是一种更加困难。< / p > < p >的热膨胀方面问题是容易。温暖的空气慢慢变暖的海洋表面变暖海洋。大约90%的热量被人为气候变化目前进入海洋。看到< a href = " http://www.skepticalscience.com/graphics.php?g = 12 " rel = " noreferrer " > < / >,和< a href = " https://www.washingtonpost.com/news/energy——environment/wp/2016/01/18/this——————————全球变暖——90%——going/?utm_term=.92efbff1e8fb”rel = " noreferrer " > < / >。这是一个巨大的热量,但海洋是足够大的扩张,增加温度移动很缓慢。约1/3的当前海平面上升是由于热膨胀,工程量约1/3的1英寸每10年,每年,约1毫米。(仅热膨胀)。< / p >

Source.

Melting glaciers are more difficult to show a direct relation. By this source there are over 130,000 glaciers in the world, and while there is a fair bit of overlap, to properly show a causal relation, you'd need to look at individual glaciers to determine the cause. You wouldn't need to look at all 130,000, but you'd need a solid sampling to demonstrate a causal relation.

What's more, under the right conditions, glaciers can grow larger as the local weather grows warmer. Warmer weather can lead to increased snowfall, which can enable glaciers to grow, even in a warmer climate. Article on that here.

The two simplest ways to make this argument is looking at the percentage of glaciers that are melting or to look at total ice volume in those glaciers. (For the 2nd one, I'd ignore the continental ice sheets and just look at the smaller glaciers), but it can be done either way.

By this article, about 90% of glaciers are shrinking world wide. If climate wasn't changing, I'd expect that to be closer to 50%. Even when climate is changing, for example, when ice ages stop are start, those are usually driven by the Northern Hemisphere having colder summers (begins the ice age) or the Northern Hemisphere having warmer summers (ends the ice age), with the Southern Hemisphere behaving in the opposite way. That suggests to me that even during the rise or fall of ice ages, 90% of the glaciers moving in the same direction probably doesn't happen. 90% of glaciers losing ice appears to be strong evidence of being caused by climate change, but that ratio lacks statistical teeth because there's no historical data to show that 90% of the world's glaciers losing ice is unusual. It seems unusual, but it's difficult to prove.

The other avenue would be to look at the total amount of loss of ice in the world's glaciers. See page below. I didn't see a number listed anywhere, but a quick calculation, Earth's glaciers are losing on average about 60 cubic miles of ice in an average year. That's pretty significant ice loss.

cdn.antarcticglaciers.org/wp-content/uploads/2014/11/images_Assessment-Reports_AR5-WG1_Chapter-04_Fig4-25_errata.jpg

from source

But both these arguments have the same weakness. Both seem to be very good evidence, neither shows a causal relation. The only way to do it scientifically would be to go through a large enough sample size of glaciers and show a pattern of causality. At least, I don't see any other way to show a direct relation.

That said, saying "90% of the worlds glaciers are losing ice" is a pretty good argument, as is saying that Earth's glaciers lose about 60 cubic miles of ice in an average year.

//www.hoelymoley.com/questions/9163/-/9166 # 9166 14 答案由kingledion海平面上升由于气候变化 kingledion //www.hoelymoley.com/users/6703 2016 - 11 - 21 - t13:08:42z 2017 - 01 - 12 t01:52:07z < p >协会的第一部分,增加大气中温室气体水平将导致地球温度上升。8951年< a href = " //www.hoelymoley.com/questions/8516/are-we-changing-earths-weather-with-global-warming/8951 " > < / >是为什么会这样一些信息,如果你有兴趣。现在假设温度正在上升(他们是),有两种机制,将连接海平面上升,融化的冰在陆地上,水和热膨胀< / p > < h1 > < / h1 > < p >土地冰气候律师很快指出,如果浮冰融化,它并没有真正改变海洋的水平(多),因为浮冰取代体积等于一个等效质量的水。我们将在接下来的部分,从冰融化的温度变化,然后变暖将会导致一些变化。< / p > < p >同时,有大约280万立方公里的冰锁在格陵兰岛的冰盖和2600万在南极洲。这两个表,如果完全融化会导致海平面上升7米和58米,分别。他们不会立即融化;虽然这个话题是有争议的,格陵兰岛可能需要一年完全融化。南极洲是更大、更冷、更隔绝的世界由于环极电流,温度波动,可能会花更长的时间来完全融化。< / p > < h1 >水的热膨胀< / h1 > < p >海水的密度随温度的变化。 Using data from this chart (Data-Table 9), the density of seawater (at 35000 ppm salinity) at 10 C is $1.0270 \frac{\text{g}}{\text{cm}^3}$ and at 15 C is at $1.0260 \frac{\text{g}}{\text{cm}^3}$. Therefore, there is an estimated $\frac{1.027-1.026}{5} = .001 \frac{\text{g}}{\text{cm}^3}$ change per degree C, or a $\frac{.001}{1.027} = .097 \% $ increase in volume for a one degree C increase in temperature from 10 C to 11 C.

Not all the earth's ocean's are at 10 C, but using this as an estimator, the $1.35 \times10^9 \text{ km}^3$ will increase by $1.31 \times10^6 \text{ km}^3$ with a 1 C increase in temperature. If you divide that by the surface area of the ocean, 510 million $\text{ km}^2$, you get an approximately 2.5 meter increase in sea level.

That calculation is not at all rigorous; deep ocean water is colder than 10 C and at lower temperatures thermal expansion is much less (just look at the linked chart to see), but it does demonstrate that there will be a detectable rise in sea level from thermal expansion of seawater as the planet heats up.

//www.hoelymoley.com/questions/9163/-/9169 # 9169 3 泰勒歌顿回答的海平面上升由于气候变化 泰勒歌顿 //www.hoelymoley.com/users/2491 2016 - 11 - 21 - t20:27:41z 2016 - 11 - 21 - t20:41:53z < p >这个想法背后的论证和科学是总结在< a href = " http://www.ucsusa.org/global_warming/science_and_impacts/impacts/infographic-sea-level-rise-global-warming.html " rel = " nofollow noreferrer " > web页面忧思科学家联盟在全球变暖导致海平面上升< / >。有一个链接到一个白皮书列出各种信息源和研究。< / p >

Basically, the claim is that CO2 makes the earth warmer by insulating the earth and preventing the escape of long-wave radiation, and this higher average temperature causes glaciers to melt and the sea level to rise due to the addition of meltwater.

(The argument is not heard too often these days because of the historical problem. In Roman times (1800-2300 years ago) sea levels were substantially lower than they are today, yet the earth's climate was warmer than the modern climate. For example, in Roman times Britain grew grapes commercially and was a big wine exporter, but now that is no longer possible because the climate of Britain is too cold to grow grapes. So, as a consequence of this problem, the sea level thing is not touted as much as it used to be back in the 1980s before the contradiction was noticed.)

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