Journal ArticleDOI
Remote impact of North Atlantic hurricanes on the Mediterranean during episodes of intense rainfall in autumn 2012
TLDR
In this article, the impact of tropical cyclones on downstream wave breaking was investigated during three episodes of intense rainfall which were the target of HyMeX (Hydrological cycle in Mediterranean eXperiment) in autumn 2012.Abstract:
Autumn is the most favourable season for tropical cyclones to undergo extratropical transition and interact with the midlatitude flow over the North Atlantic. Autumn is also the season when intense rainfall over the Mediterranean is often triggered by Rossby wave breaking. The impact of tropical cyclones on downstream wave breaking is investigated here during three episodes of intense rainfall which were the target of HyMeX (Hydrological cycle in Mediterranean eXperiment) in autumn 2012. Five-day simulations of hurricanes Leslie, Rafael and Sandy were performed with the Meso-NH model in a domain encompassing the North Atlantic and the Mediterranean. Control simulations were compared to simulations in which the hurricanes were filtered out from the initial conditions. In each case, the hurricane locally impeded the forward progression of an upstream trough, then reintensified as an extratropical cyclone during the wrap-up of the trough. The local impact of Leslie and Rafael on the midlatitude flow quickly propagated downstream along a polar jet and amplified Rossby wave breaking but decreased the intensity of the forecast precipitation over the Mediterranean. The local impact of Sandy propagated downstream along a subtropical jet in addition to the polar jet and resulted in a weak impact of the forecast precipitation on the Mediterranean. This study suggests that the interaction of tropical cyclones with the midlatitude flow over the western North Atlantic may be considered a perturbation to, rather than a source of, downstream wave breaking.read more
Citations
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Journal ArticleDOI
Rossby Wave Packets on the Midlatitude Waveguide—A Review
TL;DR: In this paper, a review of the literature on upper-tropospheric transient wave packets along the midlatitude jet stream is presented, with an emphasis on developments during the last 15 years.
Journal ArticleDOI
The Benefits of Global High Resolution for Climate Simulation: Process Understanding and the Enabling of Stakeholder Decisions at the Regional Scale
Malcolm J. Roberts,Pier Luigi Vidale,Cath Senior,Helene T. Hewitt,C. Bates,Ségolène Berthou,Ping Chang,Hannah M. Christensen,Sergey Danilov,Marie-Estelle Demory,Stephen M. Griffies,Reindert J. Haarsma,Thomas Jung,Gill Martin,Shoshiro Minobe,Todd D. Ringler,Masaki Satoh,Reinhard Schiemann,Enrico Scoccimarro,Graeme L. Stephens,Michael Wehner +20 more
TL;DR: This paper argues that global models having horizontal resolutions considerably enhanced from those typically used in previous Intergovernmental Panel on Climate Change (IPCC) and Coupled Model Intercomparison Project (CMIP) exercises now have the modeling capability to address these requirements.
Simulations of the Extratropical Transition of Tropical Cyclones
TL;DR: In this paper, the authors simulated the impact of the strength of the midlatitude circulation trough without changing its phasing with the tropical cyclone and found that the peak intensity of the extratropical cyclone following the extarropical transition is strongly dependent on the phasing, which leads to different degrees of interaction with the mid-latitude baroclinic zone.
Journal ArticleDOI
The Key Role of Diabatic Outflow in Amplifying the Midlatitude Flow: A Representative Case Study of Weather Systems Surrounding Western North Pacific Extratropical Transition
TL;DR: In this article, the role of diabatic outflow in midlatitude flow amplification was highlighted in the context of a review of the physical and dynamical processes involved in extratropical transition.
Journal ArticleDOI
A Composite Perspective of the Extratropical Flow Response to Recurving Western North Pacific Tropical Cyclones
TL;DR: In this paper, the authors investigated the composite extratropical flow response to recurving western North Pacific tropical cyclones (WNP TCs), and the dependence of this response on the strength of the TC-extrropical interaction as defined by the negative potential vorticity advection (PV) by the irrotational wind associated with the TC.
References
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
A turbulence scheme allowing for mesoscale and large‐eddy simulations
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Journal ArticleDOI
Breaking planetary waves in the stratosphere
Michael E. McIntyre,Tim Palmer +1 more
TL;DR: In this article, the authors presented the first mid-stratospheric potential vorticity maps which appear good enough to make visible the "breaking" of planetary or Rossby waves, a phenomenon ubiquitous in nature and arguably one of the most important dynamical processes affecting the stratosphere as a whole.
Tropical Cyclone Report
TL;DR: In this paper, a summary of typhoon activity in the Western North Pacific, Bay of Bengal, Arabian Sea, Western South Pacific and South Indian oceans is presented and a best track is provided for each significant tropical cyclone.