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.
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Dharssi et al. (1997) studied this question.