Influence of cold pools on the circulation over West ... - Convection

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Bias in global UM NWP 925-hPa potential temperature (Luis Garcia-Carreras) • UM too warm (MSLP too low) at ~20N, too <strong>cold</strong> (MSLP too high) at coast (~8N) • Too strong a pressure gradient – too strong a monsoon
Diurnal cycle in bias • Mid levels (~6800m): model too warm at 18Z and too <strong>cold</strong> at 00Z, consistent with early parameterised convection • PBL: warm PBL at 15N at 18Z, with a cool bias at 06Z, consistent too weak <strong>cold</strong> <strong>pools</strong> and an overactive monsoon.
Page 1 and 2: School of Earth an
Page 3 and 4: Typical West African Monsoon struct
Page 5 and 6: Atlantic Sahara The monsoon flow is
Page 7 and 8: Cold pool interacting with monsoon
Page 9 and 10: Following day … 6 June 2006 InSAR
Page 19 and 20: B605: cold pool fr
Page 21 and 22: 23 - 23.5N B605: Low level run (onb
Page 23 and 24: Interpretation / hypothesis 1 … I
Page 25 and 26: View from the cockpit: Gust front o
Page 27 and 28: Over northern Benin, 3 August 2006
Page 29 and 30: NWP biases from cold</stron
Page 31 and 32: Diurnal cycle rainfall rate compari
Page 33 and 34: Sahel - Sahara geopotential differe
Page 35 and 36: v*q (m s -1 kg kg -1 ) v*q (m s -1
Page 37 and 38: Haboobs - density currents • Fals
Page 39 and 40: Conclusions 1. NWP biases and Data
Page 41 and 42: Future plans / opportunities 1. Obs
Page 43: The end Thanks for your attention.
Page 47: Nephelometer data (dustloading) in

Influence of cold pools on the circulation over West ... - Convection

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