TY - JOUR
T1 - Can sea fog be inferred from operational GEM forecast fields?
AU - de la Fuente, Lorenzo
AU - Delage, Yves
AU - Desjardins, Serge
AU - MacAfee, Allan
AU - Person, Garry
AU - Ritchie, Harold
PY - 2007
Y1 - 2007
N2 - Three cases of widespread sea fog in Lunenburg Bay, Nova Scotia were used to evaluate the suitability of operational regional GEM forecast fields for inferring advection fog occurrences. Verification scores suggest that the objective analyses contain significant departures from observations that will affect model accuracy, given the sensitivity of fog condensation microphysics. Dew point depression (ES) scores show larger differences compared to temperature, with both influenced by surface characteristics. For objective analyses and GEM forecasts ES less than 2 C seems to match fog satellite images better than the physical threshold ES less or equal to 0 C. In addition the GEM forecasts show a general tendency towards drier conditions near the surface, therefore reconfiguring GEM to better represent condensation in the boundary layer is proposed
AB - Three cases of widespread sea fog in Lunenburg Bay, Nova Scotia were used to evaluate the suitability of operational regional GEM forecast fields for inferring advection fog occurrences. Verification scores suggest that the objective analyses contain significant departures from observations that will affect model accuracy, given the sensitivity of fog condensation microphysics. Dew point depression (ES) scores show larger differences compared to temperature, with both influenced by surface characteristics. For objective analyses and GEM forecasts ES less than 2 C seems to match fog satellite images better than the physical threshold ES less or equal to 0 C. In addition the GEM forecasts show a general tendency towards drier conditions near the surface, therefore reconfiguring GEM to better represent condensation in the boundary layer is proposed
UR - http://www.springerlink.com/content/t1t4137v80126532/
U2 - 10.1007/s00024-007-0220-9
DO - 10.1007/s00024-007-0220-9
M3 - Article
SN - 0033-4553
VL - 164
SP - 1303
EP - 1325
JO - Pure and Applied Geophysics
JF - Pure and Applied Geophysics
IS - 6-7
ER -