最近30从www.hoelymoley.com 2023 - 08 - 24 - t21:49:17z //www.hoelymoley.com/feeds/user/7505 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/14690 1 pr1268 //www.hoelymoley.com/users/7505 2018 - 07 - 26 - t15:59:57z 2018 - 07 - 26 - t15:59:57z

< p >我的问题的灵感来源于< a href = " //www.hoelymoley.com/questions/3018 " > < / >——特别是,注入水的小标题从海洋到海平面以下盆地应对海平面上升(剧透:这是严重不可行和不切实际)。< / p > < p >我也读到地形,< a href = " http://www.peakbagger.com/help/glossary.aspx # lineparent”rel = " nofollow noreferrer " >行父(s) < / >、< a href = " https://bivouac.com//DfnPg.asp?DfnId = 1033”rel = " nofollow noreferrer " >关键关口< / >,和的概念”< a href = " https://bivouac.com//DfnPg.asp?DfnId = 1052 " rel = " nofollow noreferrer突出" > < / >”走。< / p > < p >之后,我想起了我的经历浪费在谷歌地球的高程数据当试图理解< a href = " https://en.wikipedia.org/wiki/Lake_Assal_(吉布提)”rel = " nofollow noreferrer " >湖Assal < / >是非洲的最低点(-155米/ -510英尺)的异常接近海洋(只有大约5公里从亚丁湾)。<一口> 1 < /一口> < / p > < p >显然有一个鞍点海拔分离这个湖和海洋,加上父母和有突出步行穿越这鞍点,< / p > < p >, < / p > < p > < em >海拔最低的线怎么样< / em >,这从每个湖和海湾的鞍点,即< em > < / em >交谈的突出走路?< / p > < p > < >强在自然地理和日珥的研究,这方面有一个正式的名字吗?< /强> < / p > < p > <一口> 1 < /一口>有些相关:我一直好奇几十年来关于雷诺,内华达州是4500海拔但太浩湖附近6220。< / p >

//www.hoelymoley.com/q/14670 7 pr1268 //www.hoelymoley.com/users/7505 2018 - 07 - 22 - t22:06:58z 2018 - 07 - 25 - t02:12:46z

< p >地球的半径通常是作为6378137米(< a href = " https://en.wikipedia.org/wiki/Earth_radius # Global_average_radii”rel = " noreferrer " > < / >)赤道半径,其压扁是<强> < /强>定义为< a href = " https://en.wikipedia.org/wiki/Flattening # Numerical_values_for_planets”rel = " noreferrer " > 1/298.257223 < / > (WGS84),因此其极半径计算< em > < / em >为< a href = " https://en.wikipedia.org/wiki/Earth_radius # Polar_radius”rel = " noreferrer " > < / > 6356752米。然而,< / p > < p >地球海洋的平均深度是< a href = " https://www.google.com/search?q = % 20的平均% 20深度% 20所有% 20大洋noreferrer“rel = > < / > 3688米(即平均海平面以下3688米),和所有土地的平均身高高于海洋< a href = " https://www.quora.com/What-is-the-average-elevation-of-Earth-above-the-ocean-including-land-area-below-sea-level-What-is-the-atmospheric-pressure-at-that-elevation " rel = " noreferrer " > < / > 840米。< / p > < p >假设< a href = " https://hypertextbook.com/facts/1997/EricCheng.shtml " rel = " noreferrer " > 71%的海洋和陆地< / > 29%,这给了< / p > < p > 0.71美元\ * (-3688 ~ {\ rm m}) ~ + ~ 0.29 \乘以840 ~ {\ rm m} ~ = ~ -2374.8 ~ {\ rm m} $。换句话说,2374.8米以下(当前)平均海平面将地球“台球”如果所有的海洋都耗尽了< /一口> <一口> 1。< / p > < p >,我的问题是:< / p > < p > <强>的定义高程测量地球的半径是多少?< /强>台球海拔,目前的平均海平面,还是别的?< / p > < p > <一口> 1 < / >共舞,当然,这忽略了扁率造成的压扁和所有的起伏所描述的< em > < a href = " https://en.wikipedia.org/wiki/Geoid " rel = " noreferrer " >大地水准面< / > < / em >。< / p >

//www.hoelymoley.com/q/10375 5 pr1268 //www.hoelymoley.com/users/7505 2017 - 05 - 13 - t20:54:53z 2017 - 05 - 14 - t08:38:09z

< p >有一段时间了,我注意到在东南亚的山脉似乎不同寻常的“锯齿状”陡峭的表面。我的山是如何形成的基本知识(通过地质过程)告诉我,这是更常见的找到这样的山脉冰川地区(如加拿大北部、挪威等),而由构造板块碰撞出现更多的“传统”(例如主要范围的喜马拉雅山脉,安第斯山脉,等等),和地质古老山脉有一个饱经风霜的外观(例如阿帕拉契山脉)。< / p > < p >原因/原因这些SE亚洲山脉有其独特的外观吗?< / p > < p >例子(从Flickr): < / p > < p > < a href = " https://i.stack.imgur.com/HhsAj.jpg " rel = " noreferrer " > < img src = " https://i.stack.imgur.com/HhsAj.jpg " alt = "在老挝山(Flickr)”> < / > < / p > < p > < a href = " https://i.stack.imgur.com/v4b8U.jpg " rel = " noreferrer " > < img src = " https://i.stack.imgur.com/v4b8U.jpg " alt = "在这里输入图像描述" > < / > < / p >

//www.hoelymoley.com/q/9676 9 pr1268 //www.hoelymoley.com/users/7505 2017 - 02 - 12 - t17:17:52z 2017 - 02年- 13 - t20:58:33z

< p >我刚读本文< a href = " https://www.nytimes.com/2016/01/12/science/midocean-ridges-volcano-underwater.html " > < / >,并惊讶地发现:< / p > < blockquote > < p >海洋学家偶然发现(大洋中脊的)1973年火山自然。< / p > < /引用> < p >最近我发现令人惊讶的是< em > < / em >。< / p > < p >, < / p > < ul > <李> < a href = " http://www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid = aa77 " >一般地质< / >的历史可以追溯到至少3或4世纪李< / > <李>板块构造研究< a href = " http://www.ucmp.berkeley.edu/geology/techist.html " >可以追溯到1912年< / >(即使几个几十年才获得广泛接受)< /李> <李>海洋山脊是已知至少< a href = " https://en.wikipedia.org/wiki/Mid-Atlantic_Ridge " >早在1872年< / > < /李> <李>之间的关系< a href = " http://www.geology.sdsu.edu/how_volcanoes_work/Volcano_tectonic.html " > < / >地震活动和火山已经知道了一段时间(我不知道多久,但肯定< em > < / em >罗马人感到地面震动当维苏威火山的爆发)< /李> < / ul > < p >然后我的问题是,关于(看似异常)最近日期引用在上面的文章:< / p > < p > <强>为什么火山活动的发现在海底板块边界花了这么长时间? < /强> < / p >

//www.hoelymoley.com/questions/14670/what-physical-measurement-elevation-is-used-to-define-earths-radius?cid=29445 pr1268 //www.hoelymoley.com/users/7505 2018 - 07 - 23 - t22:23:39z 2018 - 07 - 23 - t22:23:39z

P.S. @BarryCarter if you want to "promote" your comment to an answer then I'd certainly accept it. In the meanwhile I'll have to figure out what to do about my failing memory. :-\

//www.hoelymoley.com/questions/14670/what-physical-measurement-elevation-is-used-to-define-earths-radius?cid=29444 pr1268 //www.hoelymoley.com/users/7505 2018 - 07 - 23 - t22:21:37z 2018 - 07 - 23 - t22:21:37z

It's ironic (and kinda sad on my part) that you mentioned that site as I, too, mentioned it in an answer regarding "sea level" on Physics SE.

//www.hoelymoley.com/questions/9676/why-did-it-take-so-long-to-discover-the-volcanic-nature-of-mid-oceanic-ridges?cid=18592 pr1268 //www.hoelymoley.com/users/7505 2017 - 02 - 12 - t17:44:55z 2017 - 02 - 12 - t17:44:55z

@ACuriousMind:当然。Didn't think to look for "earth science" [blushes]

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