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Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins

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Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins. / Fer, Ilker; Koenig, Zoe; Koslov, Igor et al.
In: Geophysical Research Letters, Vol. 47, No. 16, 2020GL088083R, 28.08.2020.

Research output: Contribution to journal › Article › peer-review

HarvardHarvard

Fer, I, Koenig, Z, Koslov, I, Ostrowski, M, Rippeth, T, Padman, L, Bosse, A & Kolas, E 2020, 'Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins', Geophysical Research Letters, vol. 47, no. 16, 2020GL088083R. https://doi.org/10.1029/2020GL088083

APA

Fer, I., Koenig, Z., Koslov, I., Ostrowski, M., Rippeth, T., Padman, L., Bosse, A., & Kolas, E. (2020). Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins. Geophysical Research Letters, 47(16), Article 2020GL088083R. https://doi.org/10.1029/2020GL088083

CBE

Fer I, Koenig Z, Koslov I, Ostrowski M, Rippeth T, Padman L, Bosse A, Kolas E. 2020. Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins. Geophysical Research Letters. 47(16):Article 2020GL088083R. https://doi.org/10.1029/2020GL088083

MLA

Fer, Ilker et al. "Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins". Geophysical Research Letters. 2020. 47(16). https://doi.org/10.1029/2020GL088083

VancouverVancouver

Fer I, Koenig Z, Koslov I, Ostrowski M, Rippeth T, Padman L et al. Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins. Geophysical Research Letters. 2020 Aug 28;47(16):2020GL088083R. Epub 2020 Aug 6. doi: 10.1029/2020GL088083

Author

Fer, Ilker ; Koenig, Zoe ; Koslov, Igor et al. / Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins. In: Geophysical Research Letters. 2020 ; Vol. 47, No. 16.

RIS

TY - JOUR

T1 - Tidally-forced lee waves drive turbulent mixing along the Arctic Ocean margins

AU - Fer, Ilker

AU - Koenig, Zoe

AU - Koslov, Igor

AU - Ostrowski, Marek

AU - Rippeth, Tom

AU - Padman, Laurie

AU - Bosse, Anthony

AU - Kolas, Eivind

PY - 2020/8/28

Y1 - 2020/8/28

N2 - In the Arctic Ocean, limited measurements indicate that the strongest mixing below the atmospherically forced surface mixed layer occurs where tidal currents are strong. However, mechanisms of energy conversion from tides to turbulence, and the overall contribution of tide-driven mixing to Arctic Ocean state, are poorly understood. We present measurements from the shelf north of Svalbard that show abrupt isopycnal vertical displacements of 10{50} m and intense dissipation associated with cross-isobath diurnal tidal currents of ~ 0:15 m/s. Energy from the barotropic tide accumulated in a trapped baroclinic lee wave during maximum downslope flow , which and was released around slack water. During a 6-h turbulent event, high frequency internal waves were present, the full 300 m depth water column became turbulent, dissipation rates increased by a factor of 100 and turbulent heat flux averaged 15 W/m2 compared with the background rate of 1 W/m2.

AB - In the Arctic Ocean, limited measurements indicate that the strongest mixing below the atmospherically forced surface mixed layer occurs where tidal currents are strong. However, mechanisms of energy conversion from tides to turbulence, and the overall contribution of tide-driven mixing to Arctic Ocean state, are poorly understood. We present measurements from the shelf north of Svalbard that show abrupt isopycnal vertical displacements of 10{50} m and intense dissipation associated with cross-isobath diurnal tidal currents of ~ 0:15 m/s. Energy from the barotropic tide accumulated in a trapped baroclinic lee wave during maximum downslope flow , which and was released around slack water. During a 6-h turbulent event, high frequency internal waves were present, the full 300 m depth water column became turbulent, dissipation rates increased by a factor of 100 and turbulent heat flux averaged 15 W/m2 compared with the background rate of 1 W/m2.

KW - Svalbard

KW - dissipation rate

KW - Arctic Ocean

KW - ocean microstructure

KW - nonlinear waves

KW - critical flow

U2 - 10.1029/2020GL088083

DO - 10.1029/2020GL088083

M3 - Article

VL - 47

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 16

M1 - 2020GL088083R

ER -