气候变化领域集成服务门户(CCPortal): Irrigation impact on precipitation during a heatwave event using WRF-ARW: The summer 2015 Po Valley case

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DOI	10.1016/j.atmosres.2020.104951
	Irrigation impact on precipitation during a heatwave event using WRF-ARW: The summer 2015 Po Valley case
	Valmassoi A.; Dudhia J.; Di Sabatino S.; Pilla F.
发表日期	2020
ISSN	0169-8095
卷号	241
英文摘要	Irrigation is crucial in sustaining food production and it is found to have a cooling effect. Changes at the surface affect both the circulation and the precipitation. The magnitude depends on the model used, the irrigation description and the water amount, as well as the region. The study focuses on northern Italy (the Po Valley) due to its vulnerability to heatwaves and dependency on local water sources. This study is performed with the Weather Research and Forecasting (WRF) model and newly developed irrigation parameterizations defined by different evaporative processes. The model runs at a 3 km convection-permitting resolution, starting in May 2015 and analyzing July. An irrigation amount of 5.7 mm is applied daily at 5 UTC for 3 h, starting from May 15. A set of convection-parameterized sensitivity simulations is used to investigate the results' dependency on timing. Using a convection-parameterized set of experiments, it is assessed that irrigation increases the precipitation accumulated over the region. While irrigation modifies the air mass properties, convection-permitting runs show that afternoon events are inhibited due to an increase in convection inhibition and decrease in boundary layer height. This happens despite the increase in the convective available potential energy (CAPE) and a decrease in both the lifting condensation level and level of free convection. For the nighttime event, irrigation increases significantly both boundary layer moisture and CAPE, increasing the precipitation. All cases are compared against the national radar composite accumulated over two hours, finding that the irrigated runs perform better than the control. © 2020
关键词	Boundary layer flow Boundary layers Parameterization Potential energy Precipitation (chemical)Thermal processing (foods)Weather forecasting Atmospheric modelling Boundary layer heights Convection inhibitions Convective available potential energies Evaporative process Lifting condensation levels Sensitivity Simulation Weather research and forecasting models Irrigation atmospheric modeling atmospheric moisture boundary layer heat wave irrigation system potential energy precipitation (climatology)summer weather forecasting Italy Po Valley
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132475
推荐引用方式 GB/T 7714	Valmassoi A.,Dudhia J.,Di Sabatino S.,et al. Irrigation impact on precipitation during a heatwave event using WRF-ARW: The summer 2015 Po Valley case[J]. Atmospheric Research,2020,241.
APA	Valmassoi A.,Dudhia J.,Di Sabatino S.,&Pilla F..(2020).Irrigation impact on precipitation during a heatwave event using WRF-ARW: The summer 2015 Po Valley case.,241.
MLA	Valmassoi A.,et al."Irrigation impact on precipitation during a heatwave event using WRF-ARW: The summer 2015 Po Valley case".241(2020).