Detrainment in deep convection

被引：31

作者：

Boing, S. J. ^{[1
]}

Siebesma, A. P. ^{[1
,2
]}

Korpershoek, J. D. ^{[1
]}

Jonker, H. J. J. ^{[1
]}

机构：

[1] Delft Univ Technol, Dept Multiscale Phys, NL-2600 GA Delft, Netherlands

[2] Royal Netherlands Meteorol Inst, NL-3730 AE De Bilt, Netherlands

来源：

GEOPHYSICAL RESEARCH LETTERS | 2012年 / 39卷

关键词：

PART I; DIURNAL CYCLE; SHALLOW; PARAMETERIZATION; SIMULATION; MODEL; VARIABILITY; SENSITIVITY; LAYER; LAND;

D O I：

10.1029/2012GL053735

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

This study explores the mechanisms that determine detrainment in deep cumulus convection. A set of 90 high-resolution Large Eddy Simulations is used to systematically explore the sensitivity of continental deep convection to the relative humidity and stability of the free troposphere. It appears that variations in the mass-flux profiles are determined by detrainment, rather than entrainment. The detrainment shows a strong dependence on the critical mixing ratio, a dimensionless parameter which describes which mixtures of cloud core and environmental air are positively buoyant. A conceptual approach to the parameterization of detrainment is proposed on the basis of these results. Citation: Boing, S. J., A. P. Siebesma, J. D. Korpershoek, and H. J. J. Jonker (2012), Detrainment in deep convection, Geophys. Res. Lett., 39, L20816, doi:10.1029/2012GL053735.

引用

页数：5

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