中国科学院南海海洋研究所机构知识库
Advanced  
SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)  > 期刊论文
学科主题: Oceanography
题名: Estimation of air-sea heat flux from ocean measurements: An ill-posed problem
作者: Zhu, J ; Kamachi, M ; Wang, DX
关键词: air-sea heat flux ; data assimilation ; oceanic mixed layer ; the adjoint method
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
发表日期: 2002
卷: 107, 期:C10, 页:-3159
收录类别: sci
部门归属: Chinese Acad Sci, Inst Atmospher Phys, ICCES, Beijing 100029, Peoples R China; Japan Meteorol Agcy, Meteorol Res Inst, Oceanog Res Dept, Tsukuba, Ibaraki 3050052, Japan; Chinese Acad Sci, S China Sea Inst Oceanog, Lab Trop Marine Environm Dynam, Guangzhou 510301, Peoples R China
项目归属: LED
摘要: In this paper we addressed that the estimation of ocean surface heat flux from ocean temperature data is an ill-posed inverse problem, just like a well-known ill-posed problem: differentiation of noisy data. We reviewed engineering literature on such problems. Using a Mellor-Yamada level 2.5 closure model and simulated temperature data, we conducted numerical experiments of retrieving heat fluxes using variational data assimilation. This study shows that estimated nonsolar heat fluxes with high time resolution have large errors even if the observation errors are small. We also discussed the ill-posedness based on sensitivity coefficients. However, by applying some regularization methods and a longer assimilation window, it is feasible to estimate heat fluxes with reasonable accuracies, at least at some lower temporal resolution. On the basis of our model and experiment configurations, the high nonlinearity of the ocean mixed layer model also can cause difficulty in optimization when the assimilation window is long (e.g., 7 days). We proposed a modified an adjoint method approach and yielded good results.
原文出处: 查看原文
WOS记录号: WOS:000180568000035
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5501
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
Estimation of air-sea heat flux from ocean measurements An ill-posed problem .pdf(927KB)----开放获取--View 联系获取全文

Recommended Citation:
Zhu, J; Kamachi, M; Wang, DX.Estimation of air-sea heat flux from ocean measurements: An ill-posed problem,JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2002,107(C10):-3159
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhu, J]'s Articles
[Kamachi, M]'s Articles
[Wang, DX]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhu, J]‘s Articles
[Kamachi, M]‘s Articles
[Wang, DX]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Estimation of air-sea heat flux from ocean measurements An ill-posed problem .pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院南海海洋研究所 - Feedback
Powered by CSpace