“Waveguidability” of idealized jets

Manola, Iris; Selten, Frank; Vries, Hylke de; Hazeleger, Wilco

doi:10.1002/jgrd.50758

Cited by 52 publications

(70 citation statements)

References 18 publications

(25 reference statements)

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“…In contrast to a single jet, a double jet regime associated with a profile for U is characterized by a confined sub-tropical jet with sharp edges wherein wind speeds change rapidly with latitude3. Such sharp sub-tropical jets are highly effective waveguides3031, a central requirement for QRA. Especially long-duration resonance events (as e.g.…”

mentioning

confidence: 99%

Influence of Anthropogenic Climate Change on Planetary Wave Resonance and Extreme Weather Events

Mann

Rahmstorf

Kornhuber

et al. 2017

Sci Rep

273

226

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Persistent episodes of extreme weather in the Northern Hemisphere summer have been shown to be associated with the presence of high-amplitude quasi-stationary atmospheric Rossby waves within a particular wavelength range (zonal wavenumber 6–8). The underlying mechanistic relationship involves the phenomenon of quasi-resonant amplification (QRA) of synoptic-scale waves with that wavenumber range becoming trapped within an effective mid-latitude atmospheric waveguide. Recent work suggests an increase in recent decades in the occurrence of QRA-favorable conditions and associated extreme weather, possibly linked to amplified Arctic warming and thus a climate change influence. Here, we isolate a specific fingerprint in the zonal mean surface temperature profile that is associated with QRA-favorable conditions. State-of-the-art (“CMIP5”) historical climate model simulations subject to anthropogenic forcing display an increase in the projection of this fingerprint that is mirrored in multiple observational surface temperature datasets. Both the models and observations suggest this signal has only recently emerged from the background noise of natural variability.

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mentioning

confidence: 99%

Influence of Anthropogenic Climate Change on Planetary Wave Resonance and Extreme Weather Events

Mann

Rahmstorf

Kornhuber

et al. 2017

Sci Rep

273

226

View full text Add to dashboard Cite

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“…The jet shift is in general the dominant robust response to Arctic warming and in fact seems apparent in many circulation indices shown by Francis and Vavrus [46] for example. Consequences for planetary wave behaviour will ultimately depend on the waveguiding ability of the jet as influenced by its position as well as its width and speed [59]. The projected future jet changes vary considerably, depending on the region and season, as a result of multiple influences in addition to the Arctic warming (e.g.…”

Section: Amplified Arctic Warming and Emerging Changes? Recent Researchmentioning

confidence: 99%

“…Manola et al [59] discussed the ability of idealised zonal jets to trap and guide Rossby waves. They found that this is most likely in narrow fast jets and that the Austral summer provides the most likely candidate for this.…”

Section: Waves and Resonancementioning

confidence: 99%

Persistent Extratropical Regimes and Climate Extremes

Hoskins

Woollings

2015

Curr Clim Change Rep

142

122

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Some studies have suggested a recent increase in high-impact persistent circulation regimes in the extratropics. In this brief review paper, we discuss some aspects of this work and also consider more broadly how regimes such as blocking and stationary Rossby wave patterns may be altered under climate change. The amplified Arctic warming is discussed as one of several factors influencing the atmospheric dynamics from the equator to the poles. Some theoretical arguments are given alongside discussion of observational and modelling results. We include consideration of climate model skill and statistical aspects of the problem linking the distribution of climate variables to the extremes.

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“…The anomalous upper level winds accompanying the change in convection constitute a Rossby wave source (Sardeshmukh et al 1987) and Rossby wave energy disperses away from the tropics, sometimes trapped by the atmospheric jets that can act as a Rossby wave guide (Branstator 2002). The strength of the waveguide response depends on the position of the Rossby wave source with respect to the jet and the width and strength of the jet itself (Manola et al 2013), such that in the winter season, the waveguide response is generally strongest.…”

Section: Remote Adjustments Through Atmospheric Rossby Wavesmentioning

confidence: 99%