Report
Genesis, evolution, and apocalypse of Loop Current rings
| العنوان: | Genesis, evolution, and apocalypse of Loop Current rings |
|---|---|
| المؤلفون: | Andrade-Cano, F, Karrasch, D., Beron-Vera, F. J. |
| سنة النشر: | 2020 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Atmospheric and Oceanic Physics |
| الوصف: | We carry out assessments of the life cycle of Loop Current vortices, so-called rings, in the Gulf of Mexico by applying three objective (i.e., observer-independent) coherent Lagrangian vortex detection methods on velocities derived from satellite altimetry measurements of sea-surface height (SSH). The methods reveal material vortices with boundaries that withstand stretching or diffusion, or whose fluid elements rotate evenly. This involved a technology advance that enables framing vortex genesis and apocalypse robustly and with precision. We find that the stretching- and diffusion-withstanding assessments produce consistent results, which show large discrepancies with Eulerian assessments that identify vortices with regions instantaneously filled with streamlines of the SSH field. The even-rotation assessment, which is vorticity-based, is found to be quite unstable, suggesting life expectancies much shorter than those produced by all other assessments. Comment: Submitted to Physics of Fluids |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2009.09050 |
| رقم الانضمام: | edsarx.2009.09050 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |