Publication Abstracts

Pilewskie and L'Ecuyer 2022

Pilewskie, J.A., and T.S. L'Ecuyer, 2022: The global nature of early-afternoon and late-night convection through the eyes of the A-Train. J. Geophys. Res. Atmos., 127, no. 13, e2022JD036438, doi:10.1029/2022JD036438.

Characterizing macrophysical properties of deep convective systems on a global scale is a precursor to understanding their influence on Earth's Energy Budget and Water Cycle. This study documents the properties of global convective objects (COs) in the early afternoon (1:30 p.m. local time; LT) and overnight (1:30 a.m. LT) measurements from the A-Train satellite constellation. CloudSat measurements are used to identify convective cores and establish their intensity, while other A-Train data sets define cloud structure, storm spatial extent, rainfall yield, and radiative effects of each CO. Global distributions of storm characteristics are consistent with previous studies in which the most intense convection is located over tropical land, particularly over the Amazon and Congo Basin, while the largest COs occur over the Maritime Continent. Despite their limited twice-daily sampling, A-Train measurements capture that early afternoon convection over tropical land is both more intense and produces heavier rainfall than nighttime land-based convection, while the day-night differences are minimal over the tropical ocean. High-resolution estimates of updraft cores reveal that CO size increases as the number of distinct cores in a CO increases owing to an increase in nonconvective rain and anvil cloud area. Convective objects generally cool the environment, which is strongest over the Northern Hemisphere midlatitudes, but cooling weakens as the nonconvective cloud fraction increases such that 30% of COs actually exert a net warming effect. These results suggest that A-Train measurements may capture bulk connections between deep convective cloud features, precipitation, and radiative effects despite a lack of complete diurnal sampling.

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BibTeX Citation

  author={Pilewskie, J. A. and L'Ecuyer, T. S.},
  title={The global nature of early-afternoon and late-night convection through the eyes of the A-Train},
  journal={Journal of Geophysical Research: Atmospheres},

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RIS Citation

ID  - pi03100n
AU  - Pilewskie, J. A.
AU  - L'Ecuyer, T. S.
PY  - 2022
TI  - The global nature of early-afternoon and late-night convection through the eyes of the A-Train
JA  - J. Geophys. Res. Atmos.
JO  - Journal of Geophysical Research: Atmospheres
VL  - 127
IS  - 13
SP  - e2022JD036438
DO  - 10.1029/2022JD036438
ER  -

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