IBL has 1°–2☌ elevated θ υ, and 1–2 g kg −1 reduced q compared to the adjacent MBL. Note deepening of IBL from west (left) to east (right). Approximate locations of converging breeze fronts are indicated by dashed linesĭeveloping IBL properties on 23 Nov ( θ υ, q, θ c, and IR surface temperature) as measured by the Cessna 340: (a) zonal transect at 100-m altitude in a developing boundary layer circa 1115 (0145) under WSW flow. Directional wind shear across the peninsula is indicative of a convergent circulation. (b) Circa 1048 (0118) and 70-m altitude, the Cessna 340 time series reveal a heated (IR) land surface with cool surrounding ocean, a θ υ excess of 1☌ over land, and deficits of q and θ c (relative to unmodified marine air). 3) and surface winds at 1100 (0130) show breeze convection over the islands together with the flight track of the Cessna over the SW peninsula of Bathurst Island. Surface winds are also shown, confirming the breeze pattern and light winds in the interiorĮxample of a peninsula-scale sea breeze on the morning of 23 Nov: (a) visible GMS satellite image (relative visible brightness similar to Fig.
Relative visible brightness scale has reverse video at brightest cloud tops (>232) with darkest clouds circa 300. Note convection around the island periphery and the tendency for preferred development near peninsulas. GMS visible imagery of convection over islands at 1100 (0130) 28 Nov.
Representative transition season soundings from Maxwell Creek, Melville Island, on : (a) full troposphere at 1130 (0200) and (b) lower troposphere at 1330 (0400) Map of Tiwi Islands and observing systems during MCTEX (after Keenan et al.
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