干旱区生态环境知识资源中心(Arid): Kinematics and dynamics of the stratocumulus average diurnal dissipation process at Atacama Desert

Arid

DOI	10.1016/j.atmosres.2021.105523
	Kinematics and dynamics of the stratocumulus average diurnal dissipation process at Atacama Desert
	Luccini, Eduardo; Rivas, Miguel
通讯作者	Luccini, E (corresponding author), Consejo Nacl Invest Cient & Tecn, Ctr Excelencia Prod & Proc Cordoba CEPROCOR, Sede Santa Maria Punilla, Pabellon Ceprocor X5164, Cordoba, Argentina.
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2021
卷号	255
英文摘要	Stratocumulus-type clouds constitute a stable system over the Southeast Pacific Ocean. Their phenomenology is well known particularly over the ocean, but a quantitative analysis of their diurnal cycle over the Pacific continental coastal desert strip of South America remained unaddressed. In this work, the stratocumulus average morning dissipation process at two sites in the Atacama Desert is documented through simple empirical mathematical equations. Based on the change rate analysis of the visible cloud optical depth (COD) inferred from solar irradiance measurements, the kinematics and the dynamics of the stratocumulus dissipation process is established, showing that it develops at an average constant ?acceleration of dissipation? (d2COD/dt2) of about -3.3 h-2, equivalent to a cloud geometrical vertical thickness change at an average constant ?acceleration of thinning? of about -40 m/h2. Towards the end of the dissipation process when cloudiness vanishes, the average ?velocity of dissipation? (dCOD/dt) and ?velocity of thinning? round -16 h-1 and -175 m/h, respectively. A simple planeparallel optical and geometrical model explains the average behavior of the phenomenon in the region on a wholly radiative base, with an absorbed fraction of solar irradiance acting as exclusive driver of the average dissipation process. About 13 kJ/m2 of net irradiation is needed to change the COD of the stratocumulus deck by one unit. The progressive morning cloud dissipation from the land on the east towards the sea on the west is evidenced. The analysis of the cloud effective transmittance and a full set of checks, including test of robustness, support these results and their interpretation.
英文关键词	Stratocumulus Diurnal dissipation process Kinematics Dynamics Solar radiation Atacama
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000636790300003
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349667
作者单位	[Luccini, Eduardo] Consejo Nacl Invest Cient & Tecn CONICET, Ctr Excelencia Prod & Proc Cordoba CEPROCOR, Sede Santa Maria Punilla, Pabellon Ceprocor X5164, Cordoba, Argentina; [Luccini, Eduardo] Pontificia Univ Catolica Argentina, Fac Quim & Ingn Rosario, Av Pellegrini 3314, RA-2000 Rosario, Santa Fe, Argentina; [Rivas, Miguel] Univ Tarapaca, Fac Ciencias, Dept Fis, Lab Radiac Solar Ultravioleta, Casilla 7-D, Arica, Chile
推荐引用方式 GB/T 7714	Luccini, Eduardo,Rivas, Miguel. Kinematics and dynamics of the stratocumulus average diurnal dissipation process at Atacama Desert[J],2021,255.
APA	Luccini, Eduardo,&Rivas, Miguel.(2021).Kinematics and dynamics of the stratocumulus average diurnal dissipation process at Atacama Desert.ATMOSPHERIC RESEARCH,255.
MLA	Luccini, Eduardo,et al."Kinematics and dynamics of the stratocumulus average diurnal dissipation process at Atacama Desert".ATMOSPHERIC RESEARCH 255(2021).