Microstructure Mixing Observations and Finescale Parameterizations in the Beaufort Sea
| العنوان: | Microstructure Mixing Observations and Finescale Parameterizations in the Beaufort Sea |
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| المؤلفون: | Elizabeth C. Fine, Matthew H. Alford, Jennifer A. MacKinnon, John B. Mickett |
| المصدر: | Journal of Physical Oceanography. 51:19-35 |
| بيانات النشر: | American Meteorological Society, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Oceanography, Arctic, Redistribution (cultural anthropology), Beaufort sea, Physical oceanography, Internal wave, Geology, Mixing (physics) |
| الوصف: | In the Beaufort Sea in September of 2015, concurrent mooring and microstructure observations were used to assess dissipation rates in the vicinity of 72°35′N, 145°1′W. Microstructure measurements from a free-falling profiler survey showed very low [(10−10) W kg−1] turbulent kinetic energy dissipation rates ε. A finescale parameterization based on both shear and strain measurements was applied to estimate the ratio of shear to strain Rω and ε at the mooring location, and a strain-based parameterization was applied to the microstructure survey (which occurred approximately 100 km away from the mooring site) for direct comparison with microstructure results. The finescale parameterization worked well, with discrepancies ranging from a factor of 1–2.5 depending on depth. The largest discrepancies occurred at depths with high shear. Mean Rω was 17, and Rω showed high variability with values ranging from 3 to 50 over 8 days. Observed ε was slightly elevated (factor of 2–3 compared with a later survey of 11 profiles taken over 3 h) from 25 to 125 m following a wind event which occurred at the beginning of the mooring deployment, reaching a maximum of ε= 6 × 10−10 W kg−1 at 30-m depth. Velocity signals associated with near-inertial waves (NIWs) were observed at depths greater than 200 m, where the Atlantic Water mass represents a reservoir of oceanic heat. However, no evidence of elevated ε or heat fluxes was observed in association with NIWs at these depths in either the microstructure survey or the finescale parameterization estimates. |
| تدمد: | 1520-0485 0022-3670 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::c211857d0b2fcf298e610d5c208ff37c https://doi.org/10.1175/jpo-d-19-0233.1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........c211857d0b2fcf298e610d5c208ff37c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15200485 00223670 |
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