On the Relative Motion of Binary Tropical Cyclones

Dong, Keqin; Neumann, Charles J.

doi:10.1175/1520-0493(1983)111<0945:otrmob>2.0.co;2

Cited by 78 publications

(58 citation statements)

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“…Since the equator lies between our twin vortices, the mutual interaction between them may be different from that considered first by Fujiwara (1923Fujiwara ( , 1931 and subsequently by several other researchers (e.g., Brand, 1970;Dong and Neumann, 1983). It is desirable to extend the Fujiwara theory to include the beta-effect in order to better understand the dynamics of cross-equatorial vortex pairs.…”

Section: Summary and Discussionmentioning

confidence: 89%

A Case Study of Cross Equatorial Twin Vortices over the Pacific in the Northern Winter using FGGE Data

Ogura

Chin

1987

Journal of the Meteorological Society of Japan

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Section: Summary and Discussionmentioning

confidence: 89%

A Case Study of Cross Equatorial Twin Vortices over the Pacific in the Northern Winter using FGGE Data

Ogura

Chin

1987

Journal of the Meteorological Society of Japan

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“…These tropical cyclones are called binary tropical cyclones. Dong and Neumann (1983) showed that the average frequency of binary tropical cyclones was three per two years over the western North Pacific and one per three years over the North Atlantic for the 36-year period 194636-year period -198136-year period . Lander (1995 and Kuo et al (2000) analyzed merging binary tropical cyclones.…”

Section: Introductionmentioning

confidence: 99%

On the Critical Separation Distance of Binary Vortices in a Nondivergent Barotropic Atmosphere

Shin

Han

Baik

2006

Journal of the Meteorological Society of Japan

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The motion of binary cyclonic vortices with equal structure and strength in no environmental flow is investigated with a focus on what determines their merger or separation. For this, proposals in previous studies on the critical separation distance of binary vortices are validated using a nondivergent barotropic model on an f -plane.Results from numerical experiments indicate that the sign of the initial relative vorticity in the midregion between two vortices largely determines their merger or separation. This is consistent with the proposal of Falkovich et al. When the initial relative vorticity in the mid-region between two vortices is negative, the two vortices separate. However, it is found that an initial positive relative vorticity between the two vortices does not guarantee their merger. Only when the initial positive relative vorticity exceeds a certain threshold value, the two vortices merge. Based upon the results of numerical experiments, it is suggested that the critical separation distance of binary vortices is slightly smaller than twice the radius at which the relative vorticity of one vortex becomes zero. The merger or separation of binary vortices can be conceptually explained by the advection of the symmetric relative vorticity of one vortex by the symmetric tangential flow of the other vortex. This relative vorticity advection produces vorticity anomalies with different magnitudes to the north and south of each vortex and results in net eastward or westward secondary flow near its center when the two vortices are initially placed in the east-west direction.

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“…However, in many cases there are interacting TCs (Dong and Neumann, 1983), (Yaroshevich and Ingel', 2006), (Pokhil and Glebova, 2011). Back in the 1970s the important role of the stratosphere state for the selforganization of atmospheric processes was statistically demonstrated (Sadler, 1979).…”

Section: Introductionmentioning

confidence: 99%

Ionosphere Parameters Changing by Interactive Tropical Cyclones according to Cosmos-1809 and Intercosmos Bulgaria-1300 Satellite Data

Boychev¹,

Belyaev²,

Kostin³

et al. 2018

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Abstract. The data analysis of the on-board instruments set of the Cosmos-1809 and IKB-1300 satellites is presented for the following events. Continuous sequence of tropical cyclones (TCs) after the Mounts Pinatubo and Hudson eruptions in 1991. Sequences of 3 super-typhoons in the Western Pacific in November 1990. Sequences of 5 hurricanes in the Atlantic Ocean in September 1981. It is shown that the effects of the several interacting TCs impact on the ionosphere differ from those of single TCs. The distribution of electron fluctuations and density, VLF-ELF oscillations, and other plasma parameters of the upper ionosphere varies at different stages of development of tropical disturbances. Models of TCs interaction that change the parameters of the ionosphere are proposed. An important role is played by acoustic oscillations generated in TCs. The strongest volcanic eruptions in the twentieth century threw a significant amount of aerosols into the stratosphere. It is discussed how stratosphere changes for interacting TCs and perturbations after volcanic eruptions apparently cause a redistribution of infrasound along the TCs track which can lead to the formation of new TCs.

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On the Relative Motion of Binary Tropical Cyclones

Cited by 78 publications

References 0 publications

A Case Study of Cross Equatorial Twin Vortices over the Pacific in the Northern Winter using FGGE Data

A Case Study of Cross Equatorial Twin Vortices over the Pacific in the Northern Winter using FGGE Data

On the Critical Separation Distance of Binary Vortices in a Nondivergent Barotropic Atmosphere

Ionosphere Parameters Changing by Interactive Tropical Cyclones according to Cosmos-1809 and Intercosmos Bulgaria-1300 Satellite Data

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