TITLE

Hurricane Juan (2003). Part I: A Diagnostic and Compositing Life Cycle Study

AUTHOR(S)
McTaggart-Cowan, Ron; Atallah, Eyad H.; Gyakum, John R.; Bosart, Lance F.
PUB. DATE
July 2006
SOURCE
Monthly Weather Review;Jul2006, Vol. 134 Issue 7, p1725
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A detailed analysis of the complex life cycle of Hurricane Juan (in 2003) is undertaken to elucidate the structures and forcings that prevailed over the period leading up to the hurricane’s landfall in Halifax, Nova Scotia, Canada. Despite the presence of easterly wave precursors, Hurricane Juan’s initial development is shown to occur in a baroclinic environment beneath a low-latitude potential vorticity streamer. This feature interacts with a lower-level shear line as the incipient vortex begins to effectively focus ascent and convection. The system undergoes a slow tropical transition over a period of several days as the deep-layer shear over the developing storm decreases. The hurricane is repeatedly perturbed by subsynoptic-scale waves traveling along the leading edge of a large upstream trough. However, Hurricane Juan maintains its tropical structure despite its relatively high formation latitude (28°N) and its northward trajectory. The unusual persistence of the storm’s tropical nature as it propagates northward is of primary interest in this study. In particular, the role of persistent ridging along the east coast of North America is investigated both in high-resolution analyses for Hurricane Juan and in a compositing framework. Dynamic tropopause, quasigeostrophic, and modified Eady model diagnostics are used to elucidate the interactions between Hurricane Juan and this amplified midlatitude flow. Given the strength and persistence of the anomalous ridge–trough couplet both in the case diagnosis and in the composite fields, the study concludes that the presence of prestorm, high-amplitude ridging along the east coast likely reinforced by diabatic ridging downshear of the storm itself produces an environment both dynamically and thermodynamically conducive to the high-latitude landfall of hurricanes still in the tropical phase.
ACCESSION #
21626179

 

Related Articles

  • The Role of Anomalously Warm Sea Surface Temperatures on the Intensity of Hurricane Juan (2003) during Its Approach to Nova Scotia. Fogarty, Christopher T.; Greatbatch, Richard J.; Ritchie, Harold // Monthly Weather Review;May2006, Vol. 134 Issue 5, p1484 

    When Hurricane Juan tracked toward Nova Scotia, Canada, in September 2003, forecasters were faced with the challenge of predicting the intensity and timing of the hurricane’s landfall. There were two competing factors dictating the storm’s intensity: 1) the decreasing sea surface...

  • Spin cycle. Mayes, Sarah; Fick, Steven // Canadian Geographic;Sep/Oct2005, Vol. 125 Issue 5, p42 

    Focuses on the damage caused by Hurricane Juan that struck Nova Scotia in September 2003. Estimated number of tropical storms that may spawn in the area; Role of rising sea temperature due to climatic change in the change in hurricane cycles; Other factors that affect the hurricane cycles.

  • Forest renewal.  // Beaver;Dec2005/Jan2006, Vol. 85 Issue 6, p12 

    The article reports on the revitalization of Point Pleasant Park in Halifax, Nova Scotia starting in spring 2006. The park land was leased by Queen Victoria to Nova Scotians in 1873. Hurricane Juan wreaked havoc the park in 2003. The Prince of Wales Tower is included among the things that were...

  • Hurricane Juan (2003). Part II: Forecasting and Numerical Simulation. McTaggart-Cowan, Ron; Bosart, Lance F.; Gyakum, John R.; Atallah, Eyad H. // Monthly Weather Review;Jul2006, Vol. 134 Issue 7, p1748 

    The landfall of Hurricane Juan (September 2003) in the Canadian Maritimes represents an ideal case in which to study the performance of operational forecasting of an intense, predominantly tropical feature entering the midlatitudes. A hybrid cyclone during its genesis phase, Juan underwent a...

  • Seasonal Forecasting of Tropical Cyclone Landfalls over Mozambique. Vitart, Frédéric; Anderson, David; Stockdale, Tim // Journal of Climate;Dec2003, Vol. 16 Issue 23, p3932 

    The 2000 tropical cyclone season over the South Indian Ocean (SIO) was exceptional in terms of tropical cyclone landfall over Mozambique. Observed data suggest that SIO tropical cyclones have a track significantly more zonal during a La Niña event and tend to be more frequent when local SSTs...

  • NATURAL WINDFALL. Downton, Dawn Rae // Canadian Geographic;May/Jun2007, Vol. 127 Issue 3, p21 

    The article focuses on the restoration and remediation plans for Point Pleasant Park in Halifax, Nova Scotia, which lost about 75,000 trees to Hurricane Juan in 2003. A privately funded international competition awarded two minimalist proposals from Halifax and Montréal to renew rather than...

  • Coastal processes: Storm-proofing with marshes. Fagherazzi, Sergio // Nature Geoscience;Oct2014, Vol. 7 Issue 10, p701 

    The article focuses on the destructive waves and water levels of frequent extreme storm events, and discusses the use of storm-proofing with marshes. It notes that wave tank experiments demonstrate salt marsh vegetation that dissipates wave energy and withstands extreme storm conditions. It says...

  • A New Look at the Pacific Storm Track Variability: Sensitivity to Tropical SSTs and to Upstream Seeding. Orlanski, Isidoro // Journal of the Atmospheric Sciences;5/1/2005, Vol. 62 Issue 5, p1367 

    There is a fairly well defined stationary wave and storm track response to El Niño SSTs over the Pacific. In this paper, the case is made that this response is a direct result of increased baroclinicity in the central Pacific and that changes in the stationary wave pattern farther east are...

  • Making waves. Haslett, Simon K. // Geographical (Geographical Magazine Ltd.);Jul2010, Vol. 82 Issue 7, p40 

    The article focuses on the historical background of tsunami incidents in Great Britain as an island nation highlighted in the book "Tsunami: The Underrated Hazard." Marine fossils deposited by a mega-tsunami more than 7,000 years ago was caused by the Storegga Slide with waves around 25 metres...

Share

Read the Article

Courtesy of

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics