Abstract This paper presents a preliminary experimental investigation into the acoustics of two elliptical jet nozzles installed close to wing model. Acoustic pressure data is obtained for range observer polar angles mounted in far field jets. Three nominal Mach numbers, namely 0.4, 0.6 and 0.8 are studied. Results suggest that elliptic jets surveyed provide noise reduction jet-surface installa...

The metacommunity concept has been widely used to explain the biodiversity patterns at various scales. It considers influences of both local (e.g., environmental filtering and biotic interactions) regional processes dispersal limitation) in shaping community structures. Compared spatial processes, influence interactions on streams received limited attention. We investigated relative importance ...

The extratropical annular-mode-like atmospheric responses to ENSO and global warming and the internal variability of annular modes are associated with similar, yet distinct, dynamical characteristics. In particular, La Niña, global warming, and the positive phase of annular modes are all associated with a poleward shift of midlatitude jet streams and surface westerlies. To improve understanding...

The large-scale motions of planetary atmospheres and oceans, constrained by strong stable stratification and rapid rotation, are characterized in part by quasi-two dimensional turbulent motion and in part by coherent structures, such as vortices, zonal jets, and low-frequency waves. These motions are intimately linked and understanding their complex and multiscale interactions presents a comple...

The present study investigates the influences of stratospheric quasi-biennial oscillation (QBO) and El Niño–Southern Oscillation (ENSO) on intensity isentropic mixing based ERA-Interim MERRA-2 reanalysis products. It is found that in stratosphere modulated by QBO ENSO. An analysis basis function multiple regression model reveals lower suppressed equatorial region WQBO phase, while enhances subt...

We employ the fifth generation of European Centre for Medium-Range Weather Forecasts Reanalysis to investigate leading mode East Asian zonal wind and contribution associated climatic factors in boreal winter during 1979–2020. The dominant mode, accounting 46% explained variance, indicates that subtropical jet (EASJ) polar frontal (EAPJ) are meridionally displaced opposite directions. correspond...

Expansion of the tropics will likely affect subtropical precipitation, but observed and modeled precipitation trends disagreewith each other.Moreover, the dynamic processes at the tropical edge and their interactionswith precipitation are not well understood. This study assesses the skill of climate models to reproduce observed Australian precipitation variability at the tropical edge. A multiv...

[1] A consistent weakening and poleward expansion of the Hadley circulation is diagnosed in the climate change simulations of the IPCC AR4 project. Associated with this widening is a poleward expansion of the subtropical dry zone. Simple scaling analysis supports the notion that the poleward extent of the Hadley cell is set by the location where the thermally driven jet first becomes baroclinic...