[A-AS05] Large-scale moisture and organized cloud systems

[AAS05-07] When, Where and to What Extent Tropospheric Temperature Perturbations near Tropical Deep Convections Follow Convective Quasi Equilibrium?

★Invited Papers

*Yi-Xian Li¹, Hirohiko Masunaga², Hanii Takahashi^3,4, Jia-Yuh Yu¹ (1.Department of Atmospheric Sciences, National Central University, Taoyuan, Taiwan, 2.Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan, 3.Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, Los Angeles, California, 4.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California)

Keywords:Convective Quasi Equilibrium, Tropical Deep Convection, Tropospheric Temperature Perturbation

In a large-scale point of view, tropical tropospheric temperature anomaly is expected to follow the structure adjusted by deep convection as implicated by the convective quasi-equilibrium (CQE) theory. Though previous studies have investigated the constraint of CQE on temperature among various temporal and spatial resolutions over the tropics, no study attempts to evaluate the CQE validity on temperature profiles framed in the vicinity of observational tropical deep convections. In this study, deep convection is identified in the context of convective lifecycle by the collocation between the CloudSat satellite and an automatic tracking algorithm named tracking of organized convection algorithm through a 3-D segmentation (TOOCAN) with data sources from geostationary satellites. The ERA-5 reanalysis data is then utilized to determine when, where and to what extent tropical tropospheric temperature perturbations near tropical deep convection obey the CQE-postulated structures. Examinations are adopted in categories using the life duration of mesoscale convective system (MCS), radius relative to the MCS center, hour since the MCS initiation. This provides an innovative angle into the evolution of convective responses at distances with respect to the centroid in a Lagrangian view.