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Sensitivity of a simulated tropical squall line to long‐wave radiation
Author(s) -
Dharssi I.,
Kershaw R.,
Tao W. K.
Publication year - 1997
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712353708
Subject(s) - squall line , outflow , inflow , meteorology , environmental science , climatology , radiation , atmospheric sciences , earth's energy budget , precipitation , geology , physics , optics
A two‐dimensional cloud‐resolving model is used to simulate a tropical squall line and to examine its sensitivity to long‐wave radiation. Model results show that the magnitude of the sensitivity to long‐wave radiation depend on the organization and structure of the squall line. For one simulation, the inclusion of long‐wave radiation increased surface precipitation by nearly a third. Long‐wave radiation is also found to enhance the mid‐level rear inflow and upper‐level outflow of the squall line. Sensitivity experiments are performed to examine the role of cloud‐top cooling and cloud‐base warming, differential cooling between clear and cloudy regions, and domain‐wide cooling.