气候变化领域集成服务门户(CCPortal): Weakening of tropical sea breeze convective systems through interactions of aerosol, radiation, and soil moisture

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DOI	10.5194/acp-22-10527-2022
	Weakening of tropical sea breeze convective systems through interactions of aerosol, radiation, and soil moisture
	Park, J. Minnie; van den Heever, Susan C.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	10527
结束页码	10549
卷号	22 期号:16 页码:23
英文摘要	This study investigates how the enhanced loading of microphysically and radiatively active aerosol particles impacts tropical sea breeze convective systems and whether these impacts are modulated by the many environments that support these cloud systems. Comparisons of two 130-member pristine and polluted ensembles demonstrate that aerosol direct effects reduce the surface incoming shortwave radiation and the surface outgoing longwave radiation. Changes in the ensemble median values of the surface latent heat flux, the mixed layer depth, the mixed layer convective available potential energy, the maximum inland sea breeze extent, and the sea breeze frontal lift suggest that enhanced aerosol loading generally creates a less favorable environment for sea breeze convective systems. However, the sign and magnitude of these aerosol-induced changes are occasionally modulated by the surface, wind, and low-level thermodynamic conditions. As reduced surface fluxes and instability inhibit the convective boundary layer development, updraft velocities of the daytime cumulus convection developing ahead of the sea breeze front are robustly reduced in polluted environments across the environments tested. Statistical emulators and variance-based sensitivity analyses reveal that the soil saturation fraction is the most important environmental factor contributing to the updraft velocity variance of this daytime cumulus convection, but that it becomes a less important contributor with enhanced aerosol loading. It is also demonstrated that increased aerosol loading generally results in a weakening of the sea-breeze-initiated convection. This suppression is particularly robust when the sea-breeze-initiated convection is shallower and, hence, restricted to warm rain processes. While the less favorable convective environment arising from aerosol direct effects also restricts the development of sea-breeze-initiated deep convection in some cases, the response does appear to be environmentally modulated, with some cases producing stronger convective updrafts in more polluted environments. Sea breeze precipitation is ubiquitously suppressed with enhanced aerosol loading across all of the environments tested; however, the magnitude of this suppression remains a function of the initial environment. Altogether, our results highlight the importance of evaluating both direct and indirect aerosol effects on convective systems under the wide range of convective environments.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000841783200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273637
作者单位	Colorado State University; United States Department of Energy (DOE); Brookhaven National Laboratory
推荐引用方式 GB/T 7714	Park, J. Minnie,van den Heever, Susan C.. Weakening of tropical sea breeze convective systems through interactions of aerosol, radiation, and soil moisture[J],2022,22(16):23.
APA	Park, J. Minnie,&van den Heever, Susan C..(2022).Weakening of tropical sea breeze convective systems through interactions of aerosol, radiation, and soil moisture.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(16),23.
MLA	Park, J. Minnie,et al."Weakening of tropical sea breeze convective systems through interactions of aerosol, radiation, and soil moisture".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.16(2022):23.