气候变化领域集成服务门户(CCPortal): Dynamic ocean topography of the northern Nordic seas: A comparison between satellite altimetry and ocean modeling

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DOI	10.5194/tc-13-611-2019
	Dynamic ocean topography of the northern Nordic seas: A comparison between satellite altimetry and ocean modeling
	Müller F.L.; Wekerle C.; Dettmering D.; Passaro M.; Bosch W.; Seitz F.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	611
结束页码	626
卷号	13 期号:2
英文摘要	The dynamic ocean topography (DOT) of the polar seas can be described by satellite altimetry sea surface height observations combined with geoid information as well as by ocean models. The altimetry observations are characterized by an irregular sampling and seasonal sea ice coverage complicating reliable DOT estimations. Models display various spatiotemporal resolutions but are limited to their computational and mathematical context and introduced forcing models. In the present paper, ALES+ retracked altimetry ranges and derived along-track DOT heights of ESA's Envisat and water heights of the Finite Element Sea Ice-Ocean Model (FESOM) are compared to investigate similarities and discrepancies. The goal of the present paper is to identify to what extent pattern and variability of the northern Nordic seas derived from measurements and model agree with each other, respectively. The study period covers the years 2003- 2009. An assessment analysis regarding seasonal DOT variabilities shows good agreement and confirms the dominant impact of the annual signal in both datasets. A comparison based on estimated regional annual signal components shows 2-3 times stronger amplitudes of the observations but good agreement of the phase. Reducing both datasets by constant offsets and the annual signal reveals small regional residuals and highly correlated DOT time series (Pearson linear correlation coefficient of at least 0.67). The highest correlations can be found in areas that are ice-free and affected by ocean currents. However, differences are visible in sea-icecovered shelf regions. Furthermore, remaining constant artificial elevations in the observational data can be attributed to an insufficient representation of the used geoid. In general, the comparison results in good agreement between simulated and altimetry-based descriptions of the DOT in the northern Nordic seas. © Author(s) 2019.
学科领域	Envisat; ice cover; modeling; oceanic current; satellite altimetry; sea ice; sea surface height; topographic mapping; topography; Arctic Ocean; Norwegian Sea
语种	英语
scopus关键词	Envisat; ice cover; modeling; oceanic current; satellite altimetry; sea ice; sea surface height; topographic mapping; topography; Arctic Ocean; Norwegian Sea
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118925
作者单位	Deutsches Geodätisches Forschungsinstitut, Technische Universität München, Arcisstraße 21, Munich, 80333, Germany; Climate Dynamics, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bussestraße 24, Bremerhaven, 27570, Germany
推荐引用方式 GB/T 7714	Müller F.L.,Wekerle C.,Dettmering D.,et al. Dynamic ocean topography of the northern Nordic seas: A comparison between satellite altimetry and ocean modeling[J],2019,13(2).
APA	Müller F.L.,Wekerle C.,Dettmering D.,Passaro M.,Bosch W.,&Seitz F..(2019).Dynamic ocean topography of the northern Nordic seas: A comparison between satellite altimetry and ocean modeling.The Cryosphere,13(2).
MLA	Müller F.L.,et al."Dynamic ocean topography of the northern Nordic seas: A comparison between satellite altimetry and ocean modeling".The Cryosphere 13.2(2019).