气候变化领域集成服务门户(CCPortal): Tracer Measurements in Growing Sea Ice Support Convective Gravity Drainage Parameterizations

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DOI	10.1029/2019JC015791
	Tracer Measurements in Growing Sea Ice Support Convective Gravity Drainage Parameterizations
	Thomas M.; Vancoppenolle M.; France J.L.; Sturges W.T.; Bakker D.C.E.; Kaiser J.; von Glasow R.
发表日期	2020
ISSN	21699275
卷号	125 期号:2
英文摘要	Gravity drainage is the dominant process redistributing solutes in growing sea ice. Modeling gravity drainage is therefore necessary to predict physical and biogeochemical variables in sea ice. We evaluate seven gravity drainage parameterizations, spanning the range of approaches in the literature, using tracer measurements in a sea ice growth experiment. Artificial sea ice is grown to around 17 cm thickness in a new experimental facility, the Roland von Glasow air-sea-ice chamber. We use NaCl (present in the water initially) and rhodamine (injected into the water after 10 cm of sea ice growth) as independent tracers of brine dynamics. We measure vertical profiles of bulk salinity in situ, as well as bulk salinity and rhodamine in discrete samples taken at the end of the experiment. Convective parameterizations that diagnose gravity drainage using Rayleigh numbers outperform a simpler convective parameterization and diffusive parameterizations when compared to observations. This study is the first to numerically model solutes decoupled from salinity using convective gravity drainage parameterizations. Our results show that (1) convective, Rayleigh number-based parameterizations are our most accurate and precise tool for predicting sea ice bulk salinity; and (2) these parameterizations can be generalized to brine dynamics parameterizations, and hence can predict the dynamics of any solute in growing sea ice. ©2020. The Authors.
英文关键词	convection; gravity drainage; laboratory; modeling; sea ice
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186984
作者单位	Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Sorbonne Université, Laboratoire d'Océanographie et du Climat (LOCEAN), Institut Pierre-Simon-Laplace (IPSL), CNRS/IRD/MNHN, Paris, France; British Antarctic Survey, Cambridge, United Kingdom; Department of Earth Sciences, Royal Holloway, University of London, Egham, United Kingdom
推荐引用方式 GB/T 7714	Thomas M.,Vancoppenolle M.,France J.L.,et al. Tracer Measurements in Growing Sea Ice Support Convective Gravity Drainage Parameterizations[J],2020,125(2).
APA	Thomas M..,Vancoppenolle M..,France J.L..,Sturges W.T..,Bakker D.C.E..,...&von Glasow R..(2020).Tracer Measurements in Growing Sea Ice Support Convective Gravity Drainage Parameterizations.Journal of Geophysical Research: Oceans,125(2).
MLA	Thomas M.,et al."Tracer Measurements in Growing Sea Ice Support Convective Gravity Drainage Parameterizations".Journal of Geophysical Research: Oceans 125.2(2020).