编辑-地球科学江南体育网页版堆栈交换江南电子竞技平台

你不是登录。你的编辑将被放置在一个队列,直到同行评议。

我们欢迎编辑,使读者更容易理解和更有价值。因为社区成员审查编辑,请尽量使文章更好比你怎么发现,例如,通过修正语法或添加额外的资源和超链接。

潮汐谐波成分的定义……?

有谁知道哪里有一个详细定义的潮汐谐波成分?上有很多东西M_2,美元S_2美元,甲烷,美元等(所有常见的),但很多,有一些(我相信)参与潮流的计算速度和方向。我感兴趣的是他们的物理意义是什么,地球/月/太阳位置的关系。

回答

的解释所有的潮汐成分相当复杂,因为涉及的不同频率之间的相互作用。谐波分析是一个扩张(潮汐的均衡理论)[1]为一组谐波。有关时间的列表包括:——月球天(月球自转周期),24.84平太阳小时。——恒星月(月球赤纬的时期),27.32平太阳天。——热带(太阳赤纬的时期),365.24平太阳天。——月球近地点,8.85年(1年= 365.2421988天)。——月球的时间节点,18.61年。——太阳能近日点的时期,20940年。可以计算任何潮汐的频率成分的组合小数字乘以每个时期(通常表示为速度,例如,每平太阳度)以上。最完整的代数扩张的成分是由1921年[Doodson] [2]。 The set of small numbers are called Doodson numbers and represent the importance of each of the period in the specific constituent. For instance, the set of Doodson numbers for the $M_2$ is (2,0,0,0,0,0), with the ”2” referring to "twice per lunar day" and the rest of the terms are zero (no influence). This is expected as the $M_2$ represents the passage of the same point on Earth through the "tidal bulge", created by the tidal forces, twice in a lunar day. The set of Doodson numbers for the $O_1$ is (1,-1,0,0,0,0), which represents 1 cycle/lunar day minus 1 cycle/tropical month. This is the result of the inclination between the Earth's axis and the Moon's orbit that causes the "tidal bulge" to be offset from the Equator and thus a point on Earth will experience one single absolute maximum per day. The explanation of the lesser tidal constituents become rather tricky as the combination of Doodson numbers increases. For instance, $MSN_2$ is a combination of lunar, solar, and nodal influences and has a set of Doodson numbers of (2,3,-2,-1,0,0) making the interpretation rather complex. While a list of origins of the constituents can be found (e.g., Table 4.1 in [Pugh, 1996][3]), ultimately it is simpler to try to understand each constituent as the result of a harmonic (~ Fourier expansion) decomposition, rather than a complex interaction between the bodies and their periods. A few good books dealing with the analysis of tides are: - Pugh, D. T. (1996). [Tides, surges and mean sea-level][3]. John Wiley & Sons Ltd. (check Table 4.1 for a list of constituents and their origin). - Godin, G. (1972). The analysis of tides, 264 pp. University of Toronto. - Kowalik, Z., & Luick, J. (2013). [The Oceanography of Tides][4]. University of Alaska Fairbanks. [1]: https://en.wikipedia.org/wiki/Theory_of_tides [2]: https://en.wikipedia.org/wiki/Arthur_Thomas_Doodson [3]: http://nora.nerc.ac.uk/119157/1/sea-level.pdf [4]: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjzpoe8nYfOAhXDHT4KHUxjAAAQFggjMAE&url=https%3A%2F%2Fwww.uaf.edu%2Ffiles%2Fsfos%2FKowalik%2Ftide_book.pdf&usg=AFQjCNHHGKUACmRcTov5kfXi-rJkZE_0SA&sig2=Pki8QsuXs8OWhjzxUGErqw&bvm=bv.127521224,d.cWw

编辑总结

取消

添加一个评论 |

正确的小错误或错误
澄清的意思,而不更改它
添加相关资源或链接
总是尊重作者的意图
不使用编辑与作者回复

创建代码用引号”或式子~篱笆
' ' '
像这样
' ' '
添加语言标识符来突出显示的代码
”“python
def函数(foo):
打印(foo)
' ' '
把段落之间的回报
在结束linebreak添加2个空间
_italic_或* *的* *
报价将>开始的
做链接(尽量使用https)
< https://example.com >
(例子)(https://example.com)
< a href = " https://example.com " > < / >示例
MathJax方程罪\ \ ^ 2θ美元

格式帮助»
回答帮助»

MathJax帮助»