| DOI: | 10.1002/grl.50774
|
| 论文题名: | Understanding the annual cycle in global steric height |
| 作者: | Giglio D.; Roemmich D.; Cornuelle B.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8630
|
| EISSN: | 1944-8361
|
| 出版年: | 2013
|
| 卷: | 40, 期:16 | | 起始页码: | 4349
|
| 结束页码: | 4354
|
| 语种: | 英语
|
| 英文关键词: | Argo
; Ekman pumping
; seasonal cycle
; steric height
; subsurface ocean
; vertical advection
|
| Scopus关键词: | Argo
; Ekman pumping
; Seasonal cycle
; steric height
; Sub-surface ocean
; Vertical advection
; Advection
; Oceanography
; Hydrographic surveys
; adiabatic process
; advection
; air-sea interaction
; annual cycle
; annual variation
; Argo
; buoyancy
; diabatic process
; Ekman pumping
; global ocean
; isopycnal layer
; salinity
; sea surface height
; surface layer
; temperature profile
; wind forcing
|
| 英文摘要: | Steric variability in the ocean includes diabatic changes in the surface layer due to air-sea buoyancy fluxes and adiabatic changes due to advection, which are dominant in the subsurface ocean. Here the annual signal in subsurface steric height (η′below 200 db) is computed on a global scale using temperature and salinity profiles from Argo floats. The zonal average of Δη′ over a season (e.g., ηMarch′-ηDecember′) is compared to the wind-forced vertical advection contribution (Δηw′) both in the global ocean and in different basins. The results show agreement that extends beyond the tropics. The estimate of Δηw′ is based on the Ekman pumping and assumes that the seasonal vertical velocity is constant over the depth range of interest. This assumption is consistent with annual isopycnal displacements inferred from Argo profiles. The contribution of horizontal advection to Δη′is significant in some regions and consistent with differences between Δη′ and Δηw′. Key Points Annual dynamical subsurface ocean variability is described globally The oceanic annual response is in balance with the wind-forcing The vertical structure of annual variability is slowly-varying. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882543153&doi=10.1002%2fgrl.50774&partnerID=40&md5=0478ae5ebf5eac146cd3dc5f76638d39
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5894
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., San Diego, CA 92093-0230, United States
|
| Recommended Citation: | |
Giglio D.,Roemmich D.,Cornuelle B.. Understanding the annual cycle in global steric height[J]. Geophysical Research Letters,2013-01-01,40(16).
|
|
|