Results 21 to 30 of about 16,923,484 (195)

Learning to identify semi-visible jets

open access: yesJournal 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

Analysis on characteristics and causes of a heavy snowstorm event in southern Henan in the beginning of January 2018

open access: yes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

Wind pressure on a single building immersed in a low-jet wind profile [PDF]

open access: yes, 2013
This paper for the first time discuss the wind pressure distribution on the building surface immersed in wind profile of low-level jet rather than a logarithmic boundary-layer profile.
Luo, Zhiwen, Hang, Jian
core   +6 more sources

Wind Shear of Low-Level Jets and Their Influence on Manned and Unmanned Fixed-Wing Aircraft during Landing Approach

open access: yesAtmosphere, 2021
Wind shear at low altitudes represents a potential hazard to landing aircraft. Based on two wind lidar data sets of one year, the occurrence of low-level jets (LLJs), the vertical wind shear and the rotation of the wind direction were analysed. The lidar
Lutz Bretschneider   +4 more
doaj   +1 more source

CLIMATOLOGY OF THE LOW LEVEL JET

open access: yesMonthly Weather Review, 1968
(Uploaded by Plazi for the Bat Literature Project) Geographical and diurnal variations in the frequency of occurrence of strong low level wind maxima arc detcrmined using 2 yr. of wind data from 47 rawinsonde stations in the United States. Maximum frequency of occurrence is found in the Great Plains at approximately 37'N. and 98"W. The vast majority of
openaire   +2 more sources

Analytical description of a nocturnal low‐level jet [PDF]

open access: yesQuarterly Journal of the Royal Meteorological Society, 2010
AbstractAn exact analytical solution of the equations of motion is presented for the Blackadar conceptual model of the nocturnal low‐level jet as an inertial oscillation arising from the sudden release of frictional constraint (near‐cessation of dry‐convective turbulent mixing) near sunset.
Alan Shapiro, Evgeni Fedorovich
openaire   +1 more source

Low Level Jets over the Southern North Sea

open access: yesMeteorologische Zeitschrift, 2019
An extensive analysis of Low Level Jets (LLJs) over the Southern North Sea is presented. The study is based on observational data from a wind LiDAR and a passive microwave radiometer, operated from May 2015 to October 2016 on the FINO1 platform, as well as on mesoscale simulations by WRF-ARW. Besides evaluations on LLJ occurrence, intensity, direction,
Wagner, David   +4 more
openaire   +5 more sources

Synoptic-Scale Forcing and Its Role in a Rare Severe Rainfall Event over the UAE: A Case Study of 15–16 April 2024

open access: yesAtmosphere
An 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

Role of west Asian surface pressure in summer monsoon onset over central India

open access: yesEnvironmental Research Letters, 2017
Using rain-gauge measurements and reanalysis data sets for 1948–2015, we propose a mechanism that controls the interannual variation of summer monsoon onset over central India.
Arindam Chakraborty, Shubhi Agrawal
doaj   +1 more source

Using the Polar Jet Stream Core Wind Speed to Estimate the Surface Low Pressure System value during winter

open access: yesAl-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

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