A Comparison of Airborne In Situ Cloud Microphysical Measurement with Ground-Based C-Band Radar Observations in Deep Stratiform Regions of African Squall Lines
Name
Drigeard-2015-A Comparison of Airb.pdf
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Author(s)
Drigeard, E.
Fontaine, E.
Wobrock, W.
Schwarzenböck, A.
Duroure, C.
Protat, A.
Delanoë, J.
Cazenave, F.
Gosset, M.
Williams, E. R.
Date Issued
December 2015
Journal
Journal of Applied Meteorology and Climatology
Publisher
American Meteorological Society
Citation
Drigeard, E.; Fontaine, E.; Wobrock, W.; Schwarzenböck, A.; Duroure, C.; Williams, E. R.; Russell, B.; Protat, A.; Delanoë, J.; Cazenave, F.; Gosset, M. et al. “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 (December 2015): 2461–2477 © 2015 American Meteorological Society
Version
Final published version
Abstract
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°N, 2°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.
MIT Department
Parsons Laboratory for Environmental Science and Engineering (Massachusetts Institute of Technology)
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1175/jamc-d-14-0262.1
