{"refrec":{"BRefID":230976,"RR":"<b>Gostiaux, L.; van Haren, H.</b> (2012). Fine-structure contamination by internal waves in the Canary Basin. <i>J. Geophys. Res. 117</i>. <a href=\"http://dx.doi.org/10.1029/2012JC008064\" target=\"_blank\">dx.doi.org/10.1029/2012JC008064</a>","BEntID":222688,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>J. Geophys. Res. 117</i>. <a href=\"https://dx.doi.org/10.1029/2012JC008064\" target=\"_blank\">https://dx.doi.org/10.1029/2012JC008064</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Gostiaux, L.; van Haren, H.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Gostiaux, L.; van Haren, H.","Englishabstract":"Over a range of 132.5 m, 54 temperature sensors (1 mK relative accuracy) were moored yearlong while sampling at 1 Hz around 1455 m in the open Canary Basin. Coherence between individual records shows a weak but significant peak above the local buoyancy frequency N for all vertical separations Delta z < 100 m, including at sensor interval Delta z = 2.5 m. Instead of a dominant zero-phase difference over the range of sensors, as observed for internal waves at frequencies f < sigma < N, with f denoting the inertial frequency, this superbuoyant coherence shows pi-phase difference. The transition from zero-phase difference, for internal waves, to pi-phase difference is abrupt and increases in frequency for decreasing Delta z < 10 m. For Delta z > 10 m, the transition is fixed at N-t similar or equal to 1.6N, which is also the maximum value of the small-scale buoyancy frequency, and limits the internal wave band on its high-frequency side. In the time domain it is observed that this high-frequency coherence mainly occurs when nonlinearities in the temperature gradient, such as steps in the temperature profile, are advected past the sensors. A simple kinematic model of fine-structure contamination is proposed to reproduce this observation. The canonical -2 slope of the temperature spectrum above N is not observed in the in situ data, which rather slope as -8/3. The -8/3 slope can, however, be reproduced in our model, provided the jumps in the temperature profile are not infinitely thin.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Fine-structure contamination by internal waves in the Canary Basin","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2012,"MonPub":null,"DateUpdate":"2014-05-26","DateCreate":"2013-12-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000310688600002","VABBcode":null,"OpenAcc":1,"DOI":"10.1029/2012JC008064"},"refs":null,"anarec":{"AnaID":230976,"PubliDate":2012,"Pagination":null,"XtraPublOfAnaID":null,"ISBN":null,"Volume":"117","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":90908,"SerRR":"Journal of Geophysical Research. 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