Effects of westward mountain-gap wind jets on the Red Sea Eastern Boundary Current and the mesoscale eddy field

Menezes Viviane (WHOI, United States)

CoAuthors

Tom Farrar (WHOI, United States); Amy Bower (WHOI, United States)

Event: 2017 Ocean Surface Topography Science Team Meeting

Session: Science III: Mesoscale and sub-mesoscale oceanography

Presentation type: Type Poster

Winds blowing over the Northern Rea Sea (NRS) are predominantly southward, along the main axis, all year round. This pattern contrasts with the winds in the southern Red Sea, where the along-axis winds reverse seasonally due to the monsoonal regime. Although the winds are mostly along-axis, several works have shown that occasionally the winds blow in a cross-axis direction from Saudi Arabia to Africa during the boreal winter. These westward wind-jet events are intermittent and occasionally hold for several days. They bring relatively cold dry air and dust from the Saudi Arabia desert, increasing heat loss and evaporation off the NRS . Previous works suggest these events contribute to increase eddy activity in the NRS and may impact the northward-flowing Eastern Boundary Current (EBC). In the present work, we investigate how the wind-jet events impact the EBC and the NRS eddy fields, through analysis of altimetric sea surface height anomalies, satellite sea surface temperature (SST), scatterometer winds, and two years of data from a mooring deployed by WHOI. We show that the westward wind jet events increase the NRS eddy activity and destroy the EBC signature in SST images.
 

Poster show times:

RoomStart DateEnd Date
Concerto Ballroom Thu, Oct 26 2017,14:00 Thu, Oct 26 2017,18:00
Menezes Viviane
WHOI
United States
vmenezes@whoi.edu