DOI: 10.1016/j.gloplacha.2013.06.005
论文题名: Salinity drift of global Argo profiles and recent halosteric sea level variation
作者: Wang X. ; Han G. ; Li W. ; Wu X. ; Zhang X.
刊名: Global and Planetary Change
ISSN: 0921-8252
出版年: 2013
卷: 108 起始页码: 42
结束页码: 55
语种: 英语
英文关键词: Argo salinity drift
; Atlantic Decadal Oscillation
; ENSO
; Indian Ocean Dipole
; Pacific Decadal Oscillation
; Sea level
Scopus关键词: Argo salinity drift
; Atlantic Decadal Oscillation
; ENSO
; Indian Ocean dipole
; Pacific decadal oscillation
; Calibration
; Sea level
; Tropics
; Uncertainty analysis
; Climatology
; anomaly
; Argo
; Atlantic Multidecadal Oscillation
; atlas
; El Nino-Southern Oscillation
; geostrophic flow
; global ocean
; Pacific Decadal Oscillation
; salinity
; sea level change
; sea surface height
; three-dimensional modeling
; time series analysis
; Atlantic Ocean
; Atlantic Ocean (North)
; Indian Ocean
; Pacific Ocean
英文摘要: A salinity sensor drift in the Array for Real-time Geostrophic Oceanography (Argo) float has been identified. In the present study the salinity calibration results for global Argo floats indicate that an upper 900. dbar averaged-positive salinity drift appears during the floats' operating period from January 2001 to December 2010. These offsets are shown to cause an uncertainty in the estimate of the steric height anomaly of up to 17. ±. 5%. Based on a multi-grid, three-dimensional, variational method we construct monthly gridded salinity fields using post-calibration Argo salinity profiles for the period 2003-2010. Monthly time series of halosteric height (HSH) for both the global and regional oceans are calculated using gridded salinity fields over the entire 8. years. It is shown that there is a global HSH pattern with a 0.05. ±. 0.03. mm/year trend of increasing HSH anomaly relative to the World Ocean Atlas (WOA) 2001 in the upper 900. dbar. Most regions of the North Atlantic Ocean show predominately inter-annual and decadal fluctuations in the HSH anomaly over the observational period. These fluctuations are associated with the Atlantic Oscillation (AO) and/or the Atlantic Multi-decadal Oscillation (AMO). For the Pacific Ocean, inter-annual variability of the HSH anomaly in the Equatorial Pacific Ocean is modulated mainly by the El Niño/Southern Oscillation (ENSO) phenomenon while in the subtropical Northern Pacific Ocean, the wet, cold phase of the Pacific Decadal Oscillation (PDO) modulates the variability of the HSH anomaly, contributing to a positive anomaly observed over the 8. years. For the Indian Ocean, both ENSO and the Indian Ocean Dipole (IOD) influence the inter-annual variability of the HSH anomaly in the Equatorial Indian Ocean. In addition, HSH trends of sub-basin regions are also investigated. We find the most pronounced positive trend occurred in the tropical and subtropical regions of the Southern Indian Ocean with HSH increasing by 0.55. ±. 0.08. mm/year, while the most remarkable negative trend occurred in the tropical and subtropical regions of the North Atlantic with HSH decreasing by -0.44. ± 0.04. mm/year. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880346972&doi=10.1016%2fj.gloplacha.2013.06.005&partnerID=40&md5=4e0eef377f3eaba5382b01a45c2b4de2
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11158
Appears in Collections: 全球变化的国际研究计划
There are no files associated with this item.
作者单位: Key Laboratory of Marine Environmental Information Technology, SOA, National Marine Data and Information Service, Tianjin 300171, China
Recommended Citation:
Wang X.,Han G.,Li W.,et al. Salinity drift of global Argo profiles and recent halosteric sea level variation[J]. Global and Planetary Change,2013-01-01,108.