如何计算从洋流timeseries动能谱吗?- 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 - 07 - 10 - t12:39:43z //www.hoelymoley.com/feeds/question/10710 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/10710 3 如何计算从洋流timeseries动能谱吗? 马克 //www.hoelymoley.com/users/5095 2017 - 06 - 28 - t10:41:50z 2017 - 06 - 29 t22:57:08z < p >如何实际计算动能谱的timeseries u和v -笛卡尔组件的海流速度($ m s ^{1} $)从一个声学多普勒获得当前分析器(ADCP)停泊在海底?你:< / p > < p > < / p > < p > 1)计算每个u和v -组件的光谱,然后计算产生的动能光谱的频域?例如柯(f) = 0.5美元\ * (u_ {(f)} ^ 2 + v_ {(f)} ^ 2)美元;美元,美元KE_ {(f)}是单位动能谱频率同样u_ {(f)}和$美元v_ {(f)} $ u和v -功率谱吗?< / p > < p >或;

2) compute the kinetic energy $KE = 0.5\times(u_{(t)}^2 + v_{(t)}^2)$, where $u_{(t)}$ & $v_{(t)}$ are the current velocity timeseries and then calculate the power spectral density (i.e. using Matlab's pwelch) of the resulting KE?

Any guidance with the theory or practical calculation would be very much appreciated.

Thank you.

 //www.hoelymoley.com/questions/10710/-/10722 # 10722 1 回答约翰如何计算从洋流timeseries动能谱吗? 约翰 //www.hoelymoley.com/users/8468 2017 - 06 - 29 t22:57:08z 2017 - 06 - 29 t22:57:08z < p >你不同的结果如果你两种方式多少?< / p > < p >我认为如果你想动能谱,用你的第二种方法。一些单独计算速度和KE光谱,如图2所示的< a href = " http://journals.ametsoc.org/doi/pdf/10.1175/2009JPO4330.1 " rel = " nofollow noreferrer " > http://journals.ametsoc.org/doi/pdf/10.1175/2009JPO4330.1 < / > (DP王et al, JPO, 2010年4月)。速度和KE光谱比较,KE光谱看起来类似于更强大的速度谱,特别是在低频率。< / p > < p >别人使用你的第一个方法(例如,< a href = " http://journals.ametsoc.org/doi/pdf/10.1175/jpo - d - 15 - 0087.1”rel = " nofollow noreferrer " > http://journals.ametsoc.org/doi/pdf/10.1175/jpo - d - 15 - 0087.1 < / >,罗查et al, JPO, 2016年2月)< / p >
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