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DOI | 10.1007/s00382-017-3742-6 |
Climatology and seasonality of upper ocean salinity: a three-dimensional view from argo floats | |
Chen, Ge1,2; Peng, Lin1; Ma, Chunyong1,2 | |
2018-03-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:2169-2182 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
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 +/- 20A degrees 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 similar to 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. |
英文关键词 | Ocean salinity Argo floats Climatology Annual cycle Semiannual cycle |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426707100039 |
WOS关键词 | SEA-SURFACE SALINITY ; MERIDIONAL OVERTURNING CIRCULATION ; LAYER SALINITY ; GLOBAL OCEAN ; CYCLE INTENSIFICATION ; TROPICAL PACIFIC ; NORTH-ATLANTIC ; WATER ; TRANSPORT ; AQUARIUS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35813 |
专题 | 气候变化 |
作者单位 | 1.Ocean Univ China, Dept Marine Technol, Coll Informat Sci & Engn, 238 Songling Rd, Qingdao 266100, Peoples R China; 2.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Ge,Peng, Lin,Ma, Chunyong. Climatology and seasonality of upper ocean salinity: a three-dimensional view from argo floats[J]. CLIMATE DYNAMICS,2018,50:2169-2182. |
APA | Chen, Ge,Peng, Lin,&Ma, Chunyong.(2018).Climatology and seasonality of upper ocean salinity: a three-dimensional view from argo floats.CLIMATE DYNAMICS,50,2169-2182. |
MLA | Chen, Ge,et al."Climatology and seasonality of upper ocean salinity: a three-dimensional view from argo floats".CLIMATE DYNAMICS 50(2018):2169-2182. |
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