Results 21 to 30 of about 494,550 (201)
Low optical polarisation at the core of the optically-thin jet of M87
, 2020 We study the optical linear and circular polarisation in the optically-thin regime of the core and jet of M87. Observations were acquired two days before the Event Horizon Telescope (EHT) campaign in early April 2017.
Acosta-Pulido, J. A. +4 more
core +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
Atmosphere, 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
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
openaire +2 more sources
Miocene orographic uplift forces rapid hydrological change in the southern central Andes [PDF]
, 2016 Rainfall in the central Andes associated with the South American Monsoon and the South American Low-Level Jet results from orographic effects on atmospheric circulation exerted by the Andean Plateau and the Eastern Cordillera.
Alonso, Ricardo Narciso +6 more
core +1 more source
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
openaire +3 more sources
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
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
openaire +2 more sources
Role of west Asian surface pressure in summer monsoon onset over central India
Environmental 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
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