Auxiliary material for Paper 2009GL040008 Zonal surface wind jets across the Red Sea due to mountain gap forcing along both sides of the Red Sea Houshuo Jiang Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA J. Thomas Farrar and Robert C. Beardsley Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA Ru Chen Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA MIT-WHOI Joint Program in Oceanography, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA Changsheng Chen School for Marine Science and Technology, University of Massachusetts-Dartmouth, New Bedford, Massachusetts, USA Jiang, H., J. T. Farrar, R. C. Beardsley, R. Chen, and C. Chen (2009), Zonal surface wind jets across the Red Sea due to mountain gap forcing along both sides of the Red Sea, Geophys. Res. Lett., 36, L19605, doi:10.1029/2009GL040008. Introduction These two supplemental figures provide information on the larger-scale conditions leading to the two types of mountain gap wind jets described in the text. 1. 2009gl040008-fs01.tif Figure S1. WRF model output of sea level pressure (line contours), 10-m surface wind vector field, and 2-m air temperature (color contours) over the Red Sea region, which give a sense of the larger-scale conditions leading to the two types of mountain gap wind jets. (a) 0500 UTC July 12, 2008. (b) 2300 UTC January 14, 2009. The red dot in (b) indicates the buoy location. The wind vectors are shown for ~20 % of the grid points. 2. 2009gl040008-fs02.tif Figure S2. The red and blue lines show the monthly mean ground line positions of the Inter-Tropical Convergence Zone (ITCZ) in Africa, constructed from WRF model outputs (30-km horizontal resolution) of monthly mean 10-m surface winds over the Middle East for the months from March 2008 to October 2008. Also plotted is the July 2008 monthly mean 10-m surface wind vector field, overlapped with color contours of the terrain height. The big white dot indicates the location of the Tokar Gap (18.5šN, 37.7šE).