IOCAS-IR  > 海洋环流与波动重点实验室
Response of the western North Pacific subtropical ocean to the slow-moving super typhoon Nanmadol
Yang Bing1,2,3,4; Hou Yijun1,2,3; Li Min4
2019-05-01
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN2096-5508
Volume37Issue:3Pages:938-956
Corresponding AuthorHou Yijun(yjhou@qdio.ac.cn)
AbstractBased on in-situ observation, satellite and reanalysis data, responses of the western North Pacific subtropical ocean (WNPSO) to the slow-moving category 5 super typhoon Nanmadol in 2011 are analyzed. The dynamical response is dominated by near-inertial currents and Ekman currents with maximum amplitude of 0.39 m/s and 0.15 m/s, respectively. The near-inertial currents concentrated around 100 m below the sea surface and had an e-folding timescale of 4 days. The near-inertial energy propagated both upward and downward, and the vertical phase speed and wavelength were estimated to be 5 m/h and 175 m, respectively. The frequency of the near-inertial currents was blue-shifted near the surface and red-shifted in ocean interior which may relate to wave propagation and/or background vorticity. The resultant surface cooling reaches -4.35 degrees C and happens when translation speed of Nanmadol is smaller than 3.0 m/s. When Nanmadol reaches super typhoon intensity, the cooling is less than 3.0 degrees C suggesting that the typhoon translation speed plays important roles as well as typhoon intensity in surface cooling. Upwelling induced by the slow-moving typhoon wind leads to typhoon track confined cooling area and the right-hand bias of cooling is slight. The mixed layer cooling and thermocline warming are induced by wind-generated upwelling and vertical entrainment. Vertical entrainment also led to mixed layer salinity increase and thermocline salinity decrease, however, mixed layer salinity decrease occurs at certain stations as well. Our results suggest that typhoon translation speed is a vital factor responsible for the oceanic thermohaline and dynamical responses, and the small Mach number (slow typhoon translation speed) facilitate development of Ekman current and upwelling.
Keywordoceanic response western North Pacific subtropical ocean South China Sea typhoon Nanmadol
DOI10.1007/s00343-019-8114-0
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000469401600018
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/161578
Collection海洋环流与波动重点实验室
Corresponding AuthorHou Yijun
Affiliation1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China
2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao 266071, Shandong, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Shandong, Peoples R China
4.Shandong Acad Sci, Inst Oceanog Instrumentat, Qingdao 266001, Shandong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang Bing,Hou Yijun,Li Min. Response of the western North Pacific subtropical ocean to the slow-moving super typhoon Nanmadol[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2019,37(3):938-956.
APA Yang Bing,Hou Yijun,&Li Min.(2019).Response of the western North Pacific subtropical ocean to the slow-moving super typhoon Nanmadol.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,37(3),938-956.
MLA Yang Bing,et al."Response of the western North Pacific subtropical ocean to the slow-moving super typhoon Nanmadol".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 37.3(2019):938-956.
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