DOI: 10.1002/grl.50321
论文题名: Infragravity waves in the deep ocean: An upward revision
作者: Aucan J. ; Ardhuin F.
刊名: Geophysical Research Letters
ISSN: 0094-8818
EISSN: 1944-8549
出版年: 2013
卷: 40, 期: 13 起始页码: 3435
结束页码: 3439
语种: 英语
英文关键词: Infragravity
; SWOT
Scopus关键词: Austral winter
; Global climatology
; Infra-gravity waves
; Infragravity
; Measurements of
; Ocean topography
; Surface gravity waves
; SWOT
; Gravity waves
; Sea level
; Water waves
; altimetry
; deep sea
; gravity wave
; mesoscale eddy
; numerical model
; swath bathymetry
; wave energy
; wavelength
; wind wave
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: Ocean infragravity waves are surface gravity waves with periods of several minutes and corresponding wavelengths of up to tens of kilometers. When propagating freely in the deep ocean, these waves are typically small, several centimeters at most, so they have been seldom studied. In the context of future wide-swath altimetry missions, these waves need to be better quantified as they have wavelengths that will be resolved by such instruments. Here, we analyze the global climatology and variability of infragravity waves in the deep ocean using data from over 40 open ocean locations, with depths larger than 2000 m. We show that typical infragravity wave heights are higher than previously estimated, with winter-averaged values up to 11 mm off the U.S. West Coast, and typically less than 6 mm in the tropics. The mid to high latitudes exhibit a strong seasonal cycle consistent with the local variability of the wind-waves, while the tropical Pacific has a higher energy level during the Austral winter that does not correlate well with the local wind-waves, suggesting a remote source for the recorded infragravity waves. These infragravity wave energies are expected to be a significant contribution to the error budget for possible measurements of sea level associated to sub-mesoscale currents at horizontal scales around 10 km. Hence, a global numerical model of infragravity waves will likely be necessary for the analysis of the planned Surface Water Ocean Topography mission. Key Points Quantification of free infragravity in the deep ocean Free infragravity energy is higher than previouly thought ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880811958&doi=10.1002%2fgrl.50321&partnerID=40&md5=b5cb3eba547aa317e87b00d8460a1deb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6082
Appears in Collections: 气候减缓与适应
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作者单位: Institut de Recherche Pour le Développement (IRD), Laboratoire d'Etudesen Géophysique et Océanographie Spatiale (LEGOS), Toulouse University (UPS), Toulouse, France
Recommended Citation:
Aucan J.,Ardhuin F.. Infragravity waves in the deep ocean: An upward revision[J]. Geophysical Research Letters,2013-01-01,40(13).