Variations in the Upper Ocean Heat Content of the Southern Canadian Basin

• Published in: Journal of Marine Science and Engineering
• Main Authors: Yu Liu, Changcheng Ye, Haobin Cen, Xiayan Lin, Guoqing Han
• Format: Article in Journal/Newspaper
• Language: English
• Published: MDPI AG 2024
• Subjects: Canadian Basin; ocean heat content; temperature profile; Pacific warm water; Atlantic warm water; Naval architecture. Shipbuilding. Marine engineering; VM1-989; Oceanography; GC1-1581; Arctic Ocean
• Online Access: https://doi.org/10.3390/jmse12040667; https://doaj.org/article/cfa7fa87cd9b47bfa21e2766301b963d

The marine environment of the Arctic Ocean has changed rapidly in recent decades. We used reanalysis data and observational data to explore the variations in the upper ocean heat content (OHC) of the Canadian Basin (CB) and the variations in the temperature profiles of the Southern Canadian Basin (SCB). Both the reanalysis data and observational data show increasing trends for the OHC of the CB from 1993 to 2023. Compared to the World Ocean Atlas data (WOA 18/23), the reanalysis data (ORAS5 or GLORYS12V1) significantly underestimated the values of the upper OHC of the Canadian Basin. To explain the OHC differences, the Ice-Tethered Profiler (ITP) observational data were used to analyze the variations in the vertical temperature profiles. We found that the reanalysis data remarkably underestimated the maximum temperatures of the subsurface Pacific warm water and its increasing trend. Based on the short-term prediction results from the Bi-LSTM neural network, we forecasted that the upper OHC will continue to increase in the SCB, mainly due to the warming of the intermediate Atlantic warm water. The research results provide a valuable reference for assessing and improving climate-coupled models.