Article

 

Air-Sea Interactions from Westerly Wind Bursts During the November 2011 MJO in the Indian Ocean Öffentlichkeit Deposited

Herunterladbarer Inhalt

PDF Herunterladen
https://ir.library.oregonstate.edu/concern/articles/bc386m033

Descriptions

Attribute NameValues
Creator
Abstract
  • The life cycles of three Madden–Julian oscillation (MJO) events were observed over the Indian Ocean as part of the Dynamics of the MJO (DYNAMO) experiment. During November 2011 near 0°, 80°E, the site of the research vessel Roger Revelle, the authors observed intense multiscale interactions within an MJO convective envelope, including exchanges between synoptic, meso, convective, and turbulence scales in both atmosphere and ocean and complicated by a developing tropical cyclone. Embedded within the MJO event, two bursts of sustained westerly wind (>10 m s⁻¹; 0–8-km height) and enhanced precipitation passed over the ship, each propagating eastward as convectively coupled Kelvin waves at an average speed of 8.6 m s⁻¹. The ocean response was rapid, energetic, and complex. The Yoshida–Wyrtki jet at the equator accelerated from less than 0.5 m s⁻¹ to more than 1.5 m s⁻¹ in 2 days. This doubled the eastward transport along the ocean's equatorial waveguide. Oceanic (subsurface) turbulent heat fluxes were comparable to atmospheric surface fluxes, thus playing a comparable role in cooling the sea surface. The sustained eastward surface jet continued to energize shear-driven entrainment at its base (near 100-m depth) after the MJO wind bursts subsided, thereby further modifying sea surface temperature for a period of several weeks after the storms had passed.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Moum, J. N., de Szoeke, S. P., Smyth, W. D., Edson, J. B., DeWitt, H. L., Moulin, A. J., ... & Fairall, C. W. (2014). Air-sea interactions from westerly wind bursts during the November 2011 MJO in the Indian Ocean. Bulletin of the American Meteorological Society, 95(8), 1185-1199. doi:10.1175/BAMS-D-12-00225.1
Journal Title
Journal Volume
  • 95
Journal Issue/Number
  • 8
Academic Affiliation
Urheberrechts-Erklärung
Funding Statement (additional comments about funding)
  • This work was funded through strongly cooperative interagency contributions from the Office of Naval Research, the National Science Foundation, and the National Oceanic and Atmospheric Administration.
Publisher
Peer Reviewed
Language
Replaces

Beziehungen

Parents:

This work has no parents.

Artikel