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1 edition of Characteristics of upper-level and boundary layer forcing in Western Pacific cyclones found in the catalog.

Characteristics of upper-level and boundary layer forcing in Western Pacific cyclones

Adam A. Kippes

Characteristics of upper-level and boundary layer forcing in Western Pacific cyclones

by Adam A. Kippes

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  • 19 Currently reading

Published by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English


Edition Notes

ContributionsNuss, Wendell A.
The Physical Object
Pagination65 p. ;
Number of Pages65
ID Numbers
Open LibraryOL25494443M

Cyclones of a somewhat different character occur closer to the Equator, generally forming in latitudes between 10° to 30° N and S over the oceans. They generally are known as tropical cyclones when their winds equal or exceed 74 miles ( km) per hour. The storms develop best towards the western edges of the ocean basins where the depth of the marine layer is most extensive. The western North Pacific sees the highest frequency of tropical cyclones, while the South Atlantic produces none.

  Seven conditions are necessary for tropical cyclones to form: a warm sea surface, non-zero Coriolis force, nonlocal conditional instability, high humidity in . western North Pacific tropical cyclone activity. Most studies have focused on the location of cyclogenesis and the total number of tropical cyclones. The main empha-sis here is on the influence of ENSO on tropical cyclone intensity. Atkinson () first noted an above-normal number of tropical cyclones developing in the eastern part of.

• The boundary between cold polar air and warm tropical air is the polar front • Extratropical cyclones develop on the polar front where large horizontal temperature gradients exist. • Surface pressure falls in response to upper-level divergent forcing • Ageostrophic wind convergence acceleration at. Even after a tropical cyclone is said to be extratropical or dissipated, it can still have tropical storm force (or occasionally hurricane/typhoon force) winds and drop several inches of rainfall. In the Pacific Ocean and Atlantic Ocean, such tropical-derived cyclones of higher latitudes can be violent and may occasionally remain at hurricane or typhoon-force wind speeds when they reach the west coast of .


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Characteristics of upper-level and boundary layer forcing in Western Pacific cyclones by Adam A. Kippes Download PDF EPUB FB2

Characteristics of upper-level and boundary layer forcing in Western Pacific cyclones. Item Preview remove-circle Characteristics of upper-level and boundary layer forcing in Western Pacific cyclones.

by Kippes, Adam A.;Nuss, Wendell A. some content may be lost due to the binding of the book. Addeddate Call number Pages: Meteorology,ExplosiveCyclogenesis,WesternPacific 19 ABSTRACT (continue on reverse if necessary and identify by block number) A study ofthecharacteristicsofupper-level andboundary layerforcing in Western Pacificcyclones is conducted.

Approved for public release; distribution is unlimitedA study of the characteristics of upper-level and boundary layer forcing in Western Pacific cyclones is conducted. Data for this study consists of twenty seven cyclones identified during the months of February and March and Author: Adam A.

Kippes. A study of the characteristics of upper-level and boundary layer forcing in Western Pacific cyclones is conducted. Data for this study consists of twenty seven cyclones identified during the months of February and March and The.

A dataset of 88 recurving western North Pacific tropical cyclones from to is investigated for rainfall characteristics during their period of recurvature. The TCs are categorized into. Choosing a Boundary Layer Parameterization for Tropical Cyclone Modeling JEFFREY D.

KEPERT Centre for Australian Weather and Climate Research, Melbourne, Australia (Manuscript received 15 Augustin final form 17 November ) ABSTRACT The boundary layer in a tropical cyclone is in some respects unlike that elsewhere in the atmosphere. It is. Western boundary currents are not the only sources of SST forcing for mesoscale atmospheric circulations.

Coastal atmospheric circulations, discussed in more detail in section 3 of this chapter, can also be altered by SST variations. Cool currents along the eastern boundaries of major ocean basins typically underlie equatorward winds and thus experience coastal upwelling as seen in the Coastal Cited by: 1.

The boundary layer flow was simulated using Kepert and Wang's model, forced by the observed storm motion, radial profile of gradient wind, and coastline position; and good agreement with the. 1 OBSERVATIONS OF TROPICAL CYCLONES 5 Sea, and Typhoons over the Western North Paciflc Ocean.

Typically the strongest winds occur in a ring some tens of kilometres from the centre and there is a calm boundary layer beneath to the upper-level out°ow. The large inward radial gradientFile Size: 2MB. The formation of tropical cyclones is strongly influenced by the temperature of the underlying ocean or, more specifically, by the thermal energy available in the upper 60 metres (about feet) of ocean waters.

Typically, the underlying ocean should have a temperature in excess of 26 °C (about 79 °F) in this layer. Both the response and forcing of bomb cyclones over the western North Pacific to the large‐scale circulation were examined on submonthly timescales, whereas the monsoonal forcing of the bomb cyclone activity was specifically highlighted on interannual and intermonthly timescales.

The major findings in this study are briefly summarized as by: This stable layer appears to enhance the detrainment of convective PFs in our TC data set at and for a few kilometers above the melting level. Citation: Thatcher, L., Y. Takayabu, C. Yokoyama, and Z. Pu (), Characteristics of tropical cyclone precipitation features over the western Pacific Cited by: 4.

Tropical cyclones (TCs) have the potential to cause severe damage to the economy, infrastructure, and inhabitants in affected areas 1,2, western North Pacific Cited by: 4.

Tropical cyclones are not only called certain things here in the U.S. depending on how strong they are, but they're also known by different names depending on where you are in the world.

In the Atlantic Ocean and Eastern Pacific, tropical cyclones are known as hurricanes. In the Western Pacific Ocean, tropical cyclones are known as : Rachelle Oblack. investigate the ways in which tropical cyclones in the western North Pacific (WNP) influence their larger-scale environment.

Our goal is to increase our under-standing of the roles of tropical cyclones (TCs) in de-termining both the climatology and interannual vari.

Severe tropical cyclones have near surface sustained wind speeds equal to or exceeding 33 m s-1 ( km h-1, 64 kn): these are called hurricanes over the Atlantic Ocean, the East Pacific Ocean and the Caribbean Sea, and Typhoons over the Western North Pacific Ocean.

Typically the strongest winds occur in a ring some tens of kilometres from the. Some aspects of mid-latitude cyclones in the Southern Hemisphere are similar to those of N. Hemisphere cyclones. They have low pressure at the surface, rotate cyclonically, form east of upper-level troughs, propagate from west to east and poleward, and have similar stages of their evolution.

They often have fronts and bad weather. This finding suggests that SK‐type cyclones may be more prevalent over the western North Atlantic Ocean (in the confluence region of the tropopause‐level jet, e.g. Koch et al. ), whereas Norwegian model‐type cyclones may be more prevalent over the eastern North Atlantic Ocean and Western Cited by: 7.

The Origin and Dispersion Characteristics of the Observed Tropical Summertime specific humidity at the top of the planetary boundary layer and is in phase with positive low-level vorticity anomalies. To the east of °E the vorticity leads the convection by about one-quarter of a wavelength.

were cut off from the upper-level mid. Tropical cyclones have strongest winds in the lower troposphere, near the top of the boundary layer, a few hundred meters above the ground. Temperate cyclones have their strongest winds at the top of the troposphere in the core ofcyclones have their strongest winds at the top of the troposphere in the core of the jet stream.

This is followed by TCs and MCCs which, while they vent large amounts of boundary layer air per storm event, are much fewer in numbers. The estimated total annual boundary layer mass flux of ×10 19 kg by all these cloud systems represents a venting of the entire boundary layer Author: William R.

Cotton, George Bryan, Susan C. van den Heever.Western North Pacific. Baguios. Phillipines. Cyclones. Indian Ocean and Australia. Characteristics of Cyclones-Low pressure centers-Circular shape-Steep pressure gradient lead to strong winds spiraling inward in a counterclockwise direction in the northern hemisphere.S.S.

Chand, in Encyclopedia of the Anthropocene, Introduction. Tropical cyclones are intense warm-cored cyclonic vortices that form over warm tropical oceans. Tropical cyclones are characterized by low atmospheric pressure, strong winds, and heavy rain that often have devastating consequences on life, property, and the economic well-being of the affected communities and the country as a.