气候变化领域集成服务门户(CCPortal): Boundary layer moisture variability at the AtmosphericRadiation Measurement (ARM) Eastern North Atlanticobservatory during marine conditions

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DOI	10.5194/acp-23-3453-2023
	Boundary layer moisture variability at the AtmosphericRadiation Measurement (ARM) Eastern North Atlanticobservatory during marine conditions
	Cadeddu, Maria P. P.; Ghate, Virendra P. P.; Turner, David D. D.; Surleta, Thomas E. E.
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	3453
结束页码	3470
卷号	23 期号:6 页码:18
英文摘要	Boundary layer moisture variability at the Eastern North Atlantic (ENA) site during marine conditions is examined at monthly and daily timescales using 5 years of ground-based observations and output from the European Center for Medium range Weather Forecast (ECMWF) reanalysis model. The annual cycle of the mixed-layer total water budgets is presented to estimate the relative contribution of large-scale advection, local moisture tendency, entrainment, and precipitation to balance the moistening due to surface latent heat flux on monthly timescales. When marine conditions prevail, advection of colder and dry air from the north acts as an important moisture sink (similar to 50 % of the overall budget) during fall and winter driving the seasonality of the budget. Entrainment and precipitation contribute to the drying of the boundary layer (similar to 25 % and similar to 15 % respectively), and the local change in moisture contributes to a small residual part. On a daily temporal scale, moist and dry mesoscale columns of vapor (similar to 10 km) are analyzed during 10 selected days of precipitating stratocumulus clouds. Adjacent moist and dry columns present distinct mesoscale features that are strongly correlated with clouds and precipitation. Dry columns adjacent to moist columns have more frequent and stronger downdrafts immediately below the cloud base. Moist columns have more frequent updrafts, stronger cloud-top cooling, and higher liquid water path and precipitation compared to the dry columns. This study highlights the complex interaction between large-scale and local processes controlling the boundary layer moisture and the importance of spatial distribution of vapor to support convection and precipitation.
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:000956142400001
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/273211
作者单位	United States Department of Energy (DOE); Argonne National Laboratory; National Oceanic Atmospheric Admin (NOAA) - USA
推荐引用方式 GB/T 7714	Cadeddu, Maria P. P.,Ghate, Virendra P. P.,Turner, David D. D.,et al. Boundary layer moisture variability at the AtmosphericRadiation Measurement (ARM) Eastern North Atlanticobservatory during marine conditions[J],2023,23(6):18.
APA	Cadeddu, Maria P. P.,Ghate, Virendra P. P.,Turner, David D. D.,&Surleta, Thomas E. E..(2023).Boundary layer moisture variability at the AtmosphericRadiation Measurement (ARM) Eastern North Atlanticobservatory during marine conditions.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(6),18.
MLA	Cadeddu, Maria P. P.,et al."Boundary layer moisture variability at the AtmosphericRadiation Measurement (ARM) Eastern North Atlanticobservatory during marine conditions".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.6(2023):18.