DOI: 10.1007/s00382-017-3742-6
Scopus记录号: 2-s2.0-85020623190
论文题名: Climatology and seasonality of upper ocean salinity: a three-dimensional view from argo floats
作者: Chen G. ; Peng L. ; Ma C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-05-06 起始页码: 2169
结束页码: 2182
语种: 英语
英文关键词: Annual cycle
; Argo floats
; Climatology
; Keyword
; Ocean salinity
; Semiannual cycle
Scopus关键词: annual cycle
; Argo
; climatology
; potential temperature
; sea surface salinity
; seasonality
; upper ocean
; vertical distribution
; Atlantic Ocean
; Indian Ocean
; Pacific Ocean
英文摘要: Primarily due to the constraints of observation technologies (both field and satellite measurements), our understanding of ocean salinity is much less mature compared to ocean temperature. As a result, the characterizations of the two most important properties of the ocean are unfortunately out of step: the former is one generation behind the latter in terms of data availability and applicability. This situation has been substantially changed with the advent of the Argo floats which measure the two variables simultaneously on a global scale since early this century. The first decade of Argo-acquired salinity data are analyzed here in the context of climatology and seasonality, yielding the following main findings for the global upper oceans. First, the six well-defined “salty pools” observed around ±20° in each hemisphere of the Pacific, Atlantic and Indian Oceans are found to tilt westward vertically from the sea surface to about 600 m depth, forming six saline cores within the subsurface oceans. Second, while potential temperature climatology decreases monotonically to the bottom in most places of the ocean, the vertical distribution of salinity can be classified into two categories: A double-halocline type forming immediately above and below the local salinity maximum around 100–150 m depths in the tropical and subtropical oceans, and a single halocline type existing at about 100 m depth in the extratropical oceans. Third, in contrast to the midlatitude dominance for temperature, seasonal variability of salinity in the oceanic mixed layer has a clear tropical dominance. Meanwhile, it is found that a two-mode structure with annual and semiannual periodicities can effectively penetrate through the upper ocean into a depth of ~2000 m. Fourth, signature of Rossby waves is identified in the annual phase map of ocean salinity within 200–600 m depths in the tropical oceans, revealing a strongly co-varying nature of ocean temperature and salinity at specific depths. These results serve as significant contributions to improving our knowledge on the haline aspect of the ocean climate. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109424
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Marine Technology, College of Information Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao, 266100, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
Recommended Citation:
Chen G.,Peng L.,Ma C.. Climatology and seasonality of upper ocean salinity: a three-dimensional view from argo floats[J]. Climate Dynamics,2018-01-01,50(2018-05-06)