{"refrec":{"BRefID":339076,"RR":"<b>Shu, H.-W.; Mitsudera, H.; Yamazaki, K.; Nakamura, T.; Kawasaki, T.; Nakanowatari, T.; Nishikawa, H.; Sasaki, H.</b> (2021). Tidally modified western boundary current drives interbasin exchange between the Sea of Okhotsk and the North Pacific. <i>NPG Scientific Reports 11(1)</i>: 12037. <a href=\"https://dx.doi.org/10.1038/s41598-021-91412-y\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-021-91412-y</a>","BEntID":335711,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 11(1)</i>: 12037. <a href=\"https://dx.doi.org/10.1038/s41598-021-91412-y\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-021-91412-y</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Shu, H.-W.; Mitsudera, H.; Yamazaki, K.; Nakamura, T.; Kawasaki, T.; Nakanowatari, T.; Nishikawa, H.; Sasaki, H.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Shu, H.-W. <i>et al.</i>","Englishabstract":"The interbasin exchange between the Sea of Okhotsk and the North Pacific governs the intermediate water ventilation and fertilization of the nutrient-rich subpolar Pacific, and thus has an enormous influence on the North Pacific. However, the mechanism of this exchange is puzzling; current studies have not explained how the western boundary current (WBC) of the subarctic North Pacific intrudes only partially into the Sea of Okhotsk. High-resolution models often exhibit unrealistically small exchanges, as the WBC overshoots passing by deep straits and does not induce exchange flows. Therefore, partial intrusion cannot be solely explained by large-scale, wind-driven circulation. Here, we demonstrate that tidal forcing is the missing mechanism that drives the exchange by steering the WBC pathway. Upstream of the deep straits, tidally-generated topographically trapped waves over a bank lead to cross-slope upwelling. This upwelling enhances bottom pressure, thereby steering the WBC pathway toward the deep straits. The upwelling is identified as the source of joint-effect-of-baroclinicity-and-relief (JEBAR) in the potential vorticity equation, which is caused by tidal oscillation instead of tidally-enhanced vertical mixing. The WBC then hits the island chain and induces exchange flows. This tidal control of WBC pathways is applicable on subpolar and polar regions globally.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Tidally modified western boundary current drives interbasin exchange between the Sea of Okhotsk and the North Pacific","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-15 01:33:35.257437","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-06-16","DateCreate":"2021-06-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000663011500011","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/s41598-021-91412-y"},"refs":null,"anarec":{"AnaID":339076,"PubliDate":2021,"Pagination":"12037","XtraPublOfAnaID":null,"ISBN":null,"Volume":"11","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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