upper‐level wind modewinter surface air temperatureThis study discovers that the interannual synchronization of winter temperature anomalies between northern Eurasia and North America is closely related to variation in the second leading mode of the 300 hPa meridional wind anomalies (i.e., V300‐EOF2...
Earth’s upper-level jet streams influence the speed and direction of travel of weather systems and commercial aircraft, and are linked to severe weather occurrence. Climate change is projected to accelerate the average upper-level jet stream winds. However, little is known about how fast (>99th...
where h is terrain height, VL is the maximum low-level wind speed within 1.5 km of the terrain. The threshold of the terrain height was determined to cover MWT-prone regions such as the Rocky Mountains, the Andes, and the Himalayas. The mountain wave term (ds) is multiplied by selecte...
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First, we review the effects of mean winds and dissipation on the vertical propagation of high-phase-speed planetary-scale waves from troposphere and stratosphere sources into the mesosphere and thermosphere, drawing on a number of milestone research papers published over the past 35 years. The ...
The back-trajectory calculations used the horizontal wind speed and direction measured by the research aircraft. The air parcels in which NPF was detected (red circles) trace back to the convective cloud and were in contact with convection more recently (relative to the sampling time) than those...
where is the eastward wind speed and is the northward wind speed at a pressure level of 250 hPa. Under the context of global warming, we also projected the changes of turbulence for the period 2015–2100 over the northern Eurasia region. The projection results of five typical models from ...
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Therefore, trends in the speed of the upper-level jet stream11,12,13 represent a closely balanced tug-of-war between two competing effects at different altitudes14. It is possible to isolate one of the competing effects by analysing the vertical shear—the change in wind speed with height—...
ridiona1 w ind s at 300hP a.F igure l show s the zonal wind at 300 hPa in winter rDecember, January, and February ). The belt of strong wind (at a speed of greater than 30 m s、is narrow to the w est of 1 1 0 。E and broad to the east of ...