Insights from NEMO simulations on the recent hydrographic changes in the Beaufort region and Bering Strait

Insights from NEMO simulations on the recent hydrographic changes in the Beaufort region and Bering Strait | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 15 December 2025 V1 Latest version Share on Insights from NEMO simulations on the recent hydrographic changes in the Beaufort region and Bering Strait Authors : Chuanshuai Fu 0000-0001-9124-5510 [email protected] , Clark Pennelly 0000-0002-2874-4234 , and Paul G. Myers 0000-0003-4514-2654 Authors Info & Affiliations https://doi.org/10.22541/au.176582082.21888570/v1 198 views 143 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract The storage/release of freshwater in the Beaufort region has changed rapidly since the early 2000s. Using a suite of coupled ocean-sea ice model Nucleus for European Modelling of the Ocean (NEMO) simulations with different configurations, resolutions, sea-ice modules, and atmospheric and runoff forcing, we review hydrographic changes in the Beaufort region and examine model performance across various runs from 2004 to 2019. We find that the global configuration (eORCA025) can better reproduce the observed freshwater changes, whereas the regional configurations (ANHA4 and ANHA12), regardless of their resolution or forcing, underestimate stored freshwater and fail to depict recent observed changes. The global configuration also has an improved representation of the vertical thermohaline structure in the Beaufort region with reduced upper ocean model biases. We further investigate the drivers of freshwater changes in the global simulation. Seasonal freshwater changes are primarily modulated by sea ice changes, while interannual freshwater variability is mainly driven by lateral freshwater flux. Comparisons with mooring data and derived transports near Bering Strait reveal that eORCA025 simulations underestimate volume transport but simulate fresher and warmer water than the observations, whereas regional ANHA4 simulations better capture Bering Strait inflow and more closely match observed temperature and salinity. These results highlight the importance of regional processes within the Arctic in shaping freshwater storage in the Beaufort Gyre. Our study provides insights into recent hydrographic changes in the Beaufort region and Bering Strait, offering suggestions for improving models’ ability to represent these changes. Supplementary Material File (1056080_0_merged_1764016518.pdf) Download 11.53 MB File (2025beaufort_seas_fu.docx) Download 461.57 KB File (2025beaufort_seas_subfigures.pdf) Download 1.73 MB Information & Authors Information Version history V1 Version 1 15 December 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords beaufort gyre region bering strait freshwater content and transport hydrographic dynamics ocean modelling sea ice Authors Affiliations Chuanshuai Fu 0000-0001-9124-5510 [email protected] University of Alberta View all articles by this author Clark Pennelly 0000-0002-2874-4234 University of Alberta View all articles by this author Paul G. Myers 0000-0003-4514-2654 University of Alberta View all articles by this author Metrics & Citations Metrics Article Usage 198 views 143 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Chuanshuai Fu, Clark Pennelly, Paul G. Myers. Insights from NEMO simulations on the recent hydrographic changes in the Beaufort region and Bering Strait. Authorea . 15 December 2025. DOI: https://doi.org/10.22541/au.176582082.21888570/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. 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