Drigeard E., Fontaine E., Wobrock W., Schwarzenbock A., Duroure C., Williams E. R., Russell B., Protat A., Delanoe J., Cazenave Frédéric, Gosset Marielle. (2015). A comparison of airborne in situ cloud microphysical measurement with ground-based c-band radar observations in deep stratiform regions of African squall lines. Journal of Applied Meteorology and Climatology, 54 (12), p. 2461-2477. ISSN 1558-8424.
Titre du document
A comparison of airborne in situ cloud microphysical measurement with ground-based c-band radar observations in deep stratiform regions of African squall lines
Drigeard E., Fontaine E., Wobrock W., Schwarzenbock A., Duroure C., Williams E. R., Russell B., Protat A., Delanoe J., Cazenave Frédéric, Gosset Marielle
Source
Journal of Applied Meteorology and Climatology, 2015,
54 (12), p. 2461-2477 ISSN 1558-8424
This study addresses clouds with significant ice water content (IWC) in the stratiform regions downwind of the convective cores of African squall lines in the framework of the French-Indian satellite Megha-Tropiques project, observed in August 2010 next to Niamey (13.5 degrees N, 2 degrees E) in the southwestern part of Niger. The objectives included comparing the IWC-Z reflectivity relationship for precipitation radars in deep stratiform anvils, collocating reflectivity observed from ground radar with the calculated reflectivity from in situ microphysics for all aircraft locations inside the radar range, and interpreting the role of large ice crystals in the reflectivity of centimeter radars through analysis of their microphysical characteristics as ice crystals larger than 5 mm frequently occurred. It was found that, in the range of 20-30 dBZ, IWC and C-band reflectivity are not really correlated. Cloud regions with high IWC caused by important crystal number concentrations can lead to the same reflectivity factor as cloud regions with low IWC formed by a few millimeter-sized ice crystals.
Plan de classement
Sciences du milieu [021]
;
Hydrologie [062]
;
Télédétection [126]
