压力在海平面的影响-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 - t19:22:49z //www.hoelymoley.com/feeds/question/8537 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/8537 3 压力在海平面的影响 user6402 //www.hoelymoley.com/users/0 2016 - 08 - 09 - t06:59:30z 2016 - 08 - 12 - t16:18:29z < p > < a href = " //www.hoelymoley.com/questions/1029/what-is-the-range-of-possible-atmospheric-pressures-on-the-surface-of-the-earth " >显示这个答案< / >大气压力变化之间的870和1070 mb。< / p > < p >你能告诉什么(如果有的话)会有影响海平面如果这种压力差(200 mb)附近的两个地区的海洋,类似已经记录过吗?如果有海拔(或抑郁)你能说什么不同重力对应吗?压力如何影响与地球的非齐次重力影响当地海平面?< / p > //www.hoelymoley.com/questions/8537/-/8560 # 8560 1 答案由arkaia海平面压力的影响 arkaia //www.hoelymoley.com/users/111 2016 - 08 - 12 - t15:39:30z 2016 - 08 - 12 - t15:39:30z < p >大气压力对海平面的影响被描述为< a href = " //www.hoelymoley.com/questions/5129/what-is-the-inverted-barometer-effect " > < / >“倒晴雨表”的影响。基本方程管理效果(< a href = " http://onlinelibrary.wiley.com/doi/10.1029/96RG03037/pdf " rel = " nofollow noreferrer " >温斯迟,口吃,1997 < / >):美元\ delta_ {IB} = -{\三角洲P_ {atm} \ / \ rho_{水}* g},美元,美元\ delta_ {IB}是海平面的变化,美元美元\三角洲P_ {atm}是大气压力的变化,美元和美元\ rho_{水}$是水的密度。< / p >

A good example of the effect was observed by Close (1918) Inverted barometer from Wunsch&Stammer, 1997 reproduction of Close, 1918 From Wunsch & Stammer, 1997.

In reality, while atmospheric pressure can vary between 870 and 1070 mb, the problem is that it might result in a change of 2m over a distance between high and low pressures that could be many hundreds of km. By comparison, the sea level gradient across the Gulf Stream is on the order of 1m/100km. The other problem is that the ocean adjusts dynamically to the differences in air pressure and the resulting sea level gradient might be smaller.

To convert pressure to force (acceleration), you can use $P=\rho g h$. The biggest differences in $g$ at the surface of Earth are around 50 mgal (50 $\mu m/s^2$) and caused by differences in latitude, altitude, and local topography and geology. The differences in gravity cause by the extra meter of water will be way smaller and can be considered negligible.

Wunsch, C., and D. Stammer (1997), Atmospheric loading and the oceanic “inverted barometer” effect, Rev. Geophys., 35(1), 79–107, doi:10.1029/96RG03037.

Close, C. (1918), The Fluctuations of Mean Sea-Level with Special Reference to Those Caused by Variations in Barometric Pressure. The Geographical Journal 52, no. 1, 51-58.
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