Results 21 to 30 of about 49,785 (166)
Lamar Low-Level Jet Program Interim Report [PDF]
, 2004 This interim report presents the results to date from the Lamar Low-Level Jet Program (LLLJP) that has been established as joint effort among the U.S. Department of Energy (DOE), the National Wind Technology Center (NWTC) of the National Renewable Energy Laboratory (NREL), and General Electric Wind Energy (GE Wind).
Kelley, N. +7 more
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Learning to identify semi-visible jets
Journal of High Energy Physics, 2022 We train a network to identify jets with fractional dark decay (semi-visible jets) using the pattern of their low-level jet constituents, and explore the nature of the information used by the network by mapping it to a space of jet substructure ...
Taylor Faucett +2 more
doaj +1 more source
Mid-level convection in a warm conveyor belt accelerates the jet stream [PDF]
Weather and Climate Dynamics, 2021 Jet streams and potential vorticity (PV) gradients along upper-level ridges, troughs and zonal flows form a waveguide that governs midlatitude dynamics. Warm conveyor belt (WCB) outflows often inject low-PV air into ridges, and the representation of WCBs
N. Blanchard +3 more
doaj +1 more source
暴雨灾害, 2019 Based on conventional observation data and NCEP/NCAR 6-hour reanalysis data with 1°×1° resolution, we analyzed the characteristics and causes of a heavy snowstorm event in southern Henan in the beginning of January 2018. The results show that this event,
Huihui CUI, Aifang SU
doaj +1 more source
AtmosphereAn intense rainfall event affected the United Arab Emirates (UAE) between 15 and 16 April 2024. This study investigated the atmospheric conditions responsible for the formation of large convective storms during this period.
Noor AlShamsi +12 more
doaj +1 more source
Characterizing mesoscale variability in low-level jet simulations for CBLAST-LOW 2001 campaign [PDF]
Meteorology and Atmospheric Physics, 2020 AbstractA low-level jet (LLJ) event observed during a frontal passage in the 2001 Coupled Boundary Layers and Air–Sea Transfer Experiment in Low Winds campaign was simulated using the Weather Research and Forecasting model (WRF). The sensitivity of the modeled LLJ characteristics, such as formation time, height and the strength of the LLJ core, to the ...
Tay, Ken, Koh, Tieh-Yong, Skote, Martin
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Low Level Jet Wind Shear in the Sahel [PDF]
International Journal of Engineering Research in Africa, 2013 In the Sahel, a vertical wind shear appears in the dry and in the wet seasons. In Niamey, Niger, during the dry season, the period of strong shears is clearly linked to the Nocturnal Low Level Jet (LLJ) since it occurs in a narrow time period around 06H00 UTC at 60% of the cases reach shears which require an alert to the pilots (higher than 4 ms-1 per ...
Madougou, Saïdou +3 more
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WRF-Simulated Low-Level Jets over Iowa: Characterization and Sensitivity Studies [PDF]
Wind Energy Science, 2020 Abstract. Output from high resolution simulations with the Weather Research and Forecasting (WRF) model are analyzed to characterize local low level jets (LLJ) over Iowa. Analyses using a detection algorithm wherein the wind speed above and below the jet maximum must be below 80 % of the jet wind speed within a vertical window of approximately 20 m–530
Jeanie A. Aird +3 more
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Gaoyuan qixiang, 2023 Based on meteorological observations， Doppler radar observation data of Tongliao station and Chifeng station， climate extreme snowfall and FNL （1°×1°） reanalysis data of NECP every 6h， this paper analyzes the disastrous extreme backflow heavy snowstorm ...
Guilian ZHANG, Zhili HUO, Xueqiang WANG
doaj +1 more source
Al-Mustansiriyah Journal of Science, 2019 The work studied the relationship between polar jet stream core speed at 300 hPa level and the surface low pressure system on winter seasons during years from 2014 to 2016. Februaries were chosen from winter seasons which the polar jet stream passes with
hazim D. mohsin
doaj +1 more source