A Gaussian function model of mesoscale eddy temperature anomalies and research of spatial distribution characteristics
Date
2024
Authors
Duan, Yingying
Zhang, Hao
Chen, Xiao
Zhou, Manli
Journal Title
Journal ISSN
Volume Title
Publisher
Remote sensing
Abstract
Mesoscale eddies are ubiquitous oceanic phenomena and play an important role in ocean circulation, ocean dynamics, and the transport of material energy. Temperature anomalies are a crucial parameter that reflects the state of mesoscale eddies. This study proposes a Gaussian function model to fit the vertical temperature anomaly (TA) profile to facilitate the analysis of variations, and the principle of the model is based on the fact that each TA profile tends to fluctuate around one or more peaks. The model is extracted and validated using Argo profiles within cyclonic and anticyclonic eddies in the Northwest Pacific Ocean spanning over the period from 2002 to 2021. The validation demonstrates that the model can accurately recover the vertical TA profiles with a limited number of parameters. This makes it suitable for analysing the spatial distribution patterns that require a large sample count. The analysis indicates that eddies with different TA profiles have a spatial aggregation effect in geographic distribution. Eddies with lower extreme temperature anomalies, at depths of 200–300 m, are mainly distributed along two bands on the north side of the Kuroshio Extension (KE) and the North Equatorial Current. Eddies with extreme TAs at the deepest depth (500–600 m) are distributed along the KE.
Description
Keywords
Argo profiles, Gaussian model, mesoscale eddy, Northwest Pacific Ocean (NWPO), vertical temperature anomaly structure
Citation
Duan, Y., Zhang, H., Chen, X., & Zhou, M. (2024). A Gaussian function model of mesoscale eddy temperature anomalies and research of spatial distribution characteristics. Remote Sensing, 16(10), 1716. https://doi.org/10.3390/rs16101716