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Microstructure Observations During the Spring 2011 Stratiphyt-ii Cruise in the Northeast Atlantic : Volume 8, Issue 6 (07/11/2012)

By Jurado, E.

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Book Id: WPLBN0004020623
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Microstructure Observations During the Spring 2011 Stratiphyt-ii Cruise in the Northeast Atlantic : Volume 8, Issue 6 (07/11/2012)  
Author: Jurado, E.
Volume: Vol. 8, Issue 6
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Van Der Woerd, H. J., Dijkstra, H. A., & Jurado, E. (2012). Microstructure Observations During the Spring 2011 Stratiphyt-ii Cruise in the Northeast Atlantic : Volume 8, Issue 6 (07/11/2012). Retrieved from

Description: Institute for Marine and Atmospheric Research Utrecht (IMAU), Dept. of Physics and Astronomy, Utrecht University, Utrecht, The Netherlands. Small-scale temperature and conductivity variations have been measured in the upper 100 m of the northeast Atlantic during the STRATIPHYT-II cruise (Las Palmas–Reykjavik, 6 April–3 May 2011). The measurements were done at midday and comprised 2 to 15 vertical profiles at each station. The derived turbulent quantities show a transition between weakly-stratified (mixed layer depth, MLD, <100) and well-mixed waters (MLD > 100), which was centered at about 48° N. The temperature eddy diffusivities, KT, range from 10−5 to 100 m2 s−1 in the weakly-stratified stations, and range from 3 × 10−4 to 2 × 100 m2 s−1 in the well-mixed stations. The turbulent kinetic energy dissipation rates, ε, range from 3 × 10−8 to 2 × 10−6 m2 s−3 south of the transition zone, and from 10−7 to 10−5 m2 s−3 north of the transition zone. The station-averaged KT values throughout the mixed layer increase exponentially with the wind speed. The station-averaged ε values throughout the mixed layer scale with the wind stress similarity variable with a scaling factor of about 1.8 in the wind-dominated stations (Ε ≈ 1.8 u3/(−Κz)). The values of KT and ε are on average 10 times higher compared to the values measured at the same stations in July 2009. The results presented here constitute a unique data set giving large spatial coverage of upper ocean spring turbulence quantities.

Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic

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