Results 161 to 170 of about 494,550 (201)

A nocturnal low level jet during PUKK

Boundary-Layer Meteorology, 1985
A nocturnal low-level jet characterized by a distinct inertial oscillation lasting from around sunset until sunrise the next day was observed during the coastal experiment PUKK. The phenomenon appeared over an area of at least 40 km in diameter; it thus had a mesoscale extension.
Helmut Kraus, J�rgen Malcher, Eberhard Schaller   +2 more
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The Use of Low-Level Jets by Migrating Birds

Naturwissenschaften, 1999
Birds flying at high altitudes have occasionally been observed above mountain areas and the open sea. For the first time the regular occurrence of migrating birds flying within a low-level jet at heights of 5000 to almost 9000 m asl. have now been verified by radar above the Negev desert in southern Israel.
F, Liechti, E, Schaller
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CLIMATOLOGY OF THE LOW LEVEL JET

Monthly Weather Review, 1968
Abstract Geographical and diurnal variations in the frequency of occurrence of strong low level wind maxima are determined 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.
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Nocturnal low-level jet over a shallow slope

Acta Geophysica, 2009
A simple theory is presented for a nocturnal low-level jet (LLJ) over a planar slope. The theory extends the classical inviscid inertial-oscillation model of LLJs to include up- and downslope motion in the boundary layer within a stably stratified environment.
Alan Shapiro, Evgeni Fedorovich
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The Intra‐Americas Sea Low‐level Jet

Annals of the New York Academy of Sciences, 2008
A relevant climate feature of the Intra‐Americas Sea (IAS) is the low‐level jet (IALLJ) dominating the IAS circulation, both in summer and winter; and yet it is practically unknown with regard to its nature, structure, interactions with mid‐latitude and tropical phenomena, and its role in regional weather and climate.
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Nocturnal basin low-level jets: an integrated study

Acta Geophysica, 2008
Low-level jets (LLJs) are a very common feature in the nocturnal stably stratified boundary layer. Many factors can intervene in their generation, linked basically to effects of baroclinity. A special kind of low-level jets is composed by the nocturnal katabatic and basin flows, generated over terrain slopes. A study of observed LLJs in the Duero Basin
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The low‐level katabatic jet height versus Monin–Obukhov height

Quarterly Journal of the Royal Meteorological Society, 2007
AbstractIn this short note we discuss a long‐standing problem in modelling the atmospheric boundary layer (ABL) over complex terrain: namely, an excessive use of the Monin–Obukhov length scale LMO. This issue becomes increasingly relevant with the ever‐increasing resolution of numerical weather‐prediction and climate models, which typically use LMO in ...
Grisogono, Branko, Kraljević, Lukša, Jeričević, Amela   +2 more
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Raptor responses to low-level jet aircraft and sonic booms

Environmental Pollution, 1991
We estimated effects of low-level military jet aircraft and mid- to high-altitude sonic booms (actual and simulated) on nesting peregrine falcons (Falco peregrinus) and seven other raptors by observing their responses to test stimuli, determining nesting success for the test year, and evaluating site reoccupancy rates for the year following the tests ...
D H, Ellis, C H, Ellis, D P, Mindell
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Low-level Jet at White Sands Missile Range

Journal of Applied Meteorology, 1966
Abstract Wind data collected at White Sands Missile Range, New Mexico, frequently show a sharp maximum in the wind speed profile below 3000 ft. This low-level maximum is often supergeostrophic and associated with large values of wind shear in the lower levels.
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Advances in low-level jet research and future prospects

Acta Meteorologica Sinica, 2014
The low-level jet (LLJ) is closely related to severe rainfall events, air pollution, wind energy utilization, aviation safety, sandstorms, forest fire, and other weather and climate phenomena. Therefore, it has attracted considerable attention since its discovery. Scientists have carried out many studies on LLJs and made significant achievements during
Hongbo Liu, Mingyang He, Bin Wang, Qinghong Zhang   +3 more
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