气候变化领域集成服务门户(CCPortal): Assessing the Skill of the Improved Treatment of Riverine Freshwater in the Community Earth System Model (CESM) Relative to a New Salinity Climatology

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DOI	10.1029/2018MS001349
	Assessing the Skill of the Improved Treatment of Riverine Freshwater in the Community Earth System Model (CESM) Relative to a New Salinity Climatology
	Sun Q.; Whitney M.M.; Bryan F.O.; Tseng Y.-H.
发表日期	2019
ISSN	19422466
起始页码	1189
结束页码	1206
卷号	11 期号:5
英文摘要	Recent studies have explored the sensitivity of global ocean model simulations to the treatment of riverine freshwater and the representation of estuarine processes via an estuary box model applied within Community Earth System Model (CESM). This study builds on these efforts by assessing the model skill score relative to a new salinity climatology. The new climatology averages the original observational data of the World Ocean Database directly onto the CESM ocean component tracer grid cells without spatial interpolation, smoothing, or other gap-filling techniques to mitigate coastal ocean salinity bias present in the World Ocean Atlas. The mean square error for coastal upper ocean salinity relative to climatology is reduced by up to 14%, and the mean square error of near-surface salinity stratification is reduced by up to 28% near major river mouths in the simulations with improved treatments of river runoff. The improvement in upper ocean bulk salinity is attributed primarily to focusing runoff as point sources thereby avoiding the artificial horizontal spreading of the control run and to applying a locally varying instead of a global constant reference salinity for riverine virtual salt fluxes. The improvements in near-surface salinity stratification are primarily attributed to adding parameterized estuarine mixing with the estuary box model. Salinity and salinity stratification skill improvements are achieved not just near large rivers but also along the global coast and skill improvements extend far offshore. Despite these improvements, many other sources of model-climatology mismatch in coastal salinity and stratification remain and merit further attention. ©2019. The Authors.
英文关键词	climate modeling; climatology; continental shelf; river runoff; salinity; stratification
语种	英语
scopus关键词	Climate models; Estuaries; Mean square error; Oceanography; Offshore oil well production; Rivers; Runoff; Thermal stratification; Water; Continental shelves; Earth system model; Global ocean model; River runoffs; salinity; Salinity climatology; Salinity stratification; Spatial interpolation; Climatology; climate modeling; continental shelf; estuarine environment; freshwater input; global ocean; nearshore dynamics; river water; runoff; salinity; stratification; upper ocean
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156922
作者单位	Department of Marine Sciences, University of Connecticut, Groton, CT, United States; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Institute of Oceanography, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Sun Q.,Whitney M.M.,Bryan F.O.,et al. Assessing the Skill of the Improved Treatment of Riverine Freshwater in the Community Earth System Model (CESM) Relative to a New Salinity Climatology[J],2019,11(5).
APA	Sun Q.,Whitney M.M.,Bryan F.O.,&Tseng Y.-H..(2019).Assessing the Skill of the Improved Treatment of Riverine Freshwater in the Community Earth System Model (CESM) Relative to a New Salinity Climatology.Journal of Advances in Modeling Earth Systems,11(5).
MLA	Sun Q.,et al."Assessing the Skill of the Improved Treatment of Riverine Freshwater in the Community Earth System Model (CESM) Relative to a New Salinity Climatology".Journal of Advances in Modeling Earth Systems 11.5(2019).