Effects of thermodynamic profiles on the interaction of binary tropical cyclones

Wook Jang, Hye-Yeong Chun

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The interactions between idealized binary tropical cyclones (TCs) on f and β planes with different separation distance and thermodynamic soundings obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data averaged over the western North Pacific are investigated through ensemble three-dimensional numerical simulations with a horizontal resolution of 10 km in a single domain. In the simulations on the f plane, two TCs show mutual cyclonic rotations with symmetric structures. Two TCs with thermodynamic profiles of larger convective available potential energy (CAPE) and maximum potential intensity (MPI) show greater interaction than those with a smaller CAPE and MPI due to the stronger tangential velocity near the TC center. In the simulations on the β plane, the two TCs do not merge, because the beta effect prevents the attraction of the two TCs by generating asymmetric motions of the TC with northwestward forcing. The relative strengths of the two TCs change with time and depend on the low-level inflow influenced by the Coriolis parameter. Similar to the results on the f plane, the two TCs only merge with the thermodynamic soundings of large CAPE and MPI.

Original languageEnglish
Pages (from-to)9173-9192
Number of pages20
JournalJournal of Geophysical Research
Volume120
Issue number18
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

cyclones
hurricanes
tropical cyclone
thermodynamics
Thermodynamics
profiles
interactions
Potential energy
potential energy
sounding
energy
simulation
effect
attraction
inflow
prediction
Computer simulation

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology

Cite this

@article{3e2199bb3214470689e8b3c70f0d3c99,
title = "Effects of thermodynamic profiles on the interaction of binary tropical cyclones",
abstract = "The interactions between idealized binary tropical cyclones (TCs) on f and β planes with different separation distance and thermodynamic soundings obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data averaged over the western North Pacific are investigated through ensemble three-dimensional numerical simulations with a horizontal resolution of 10 km in a single domain. In the simulations on the f plane, two TCs show mutual cyclonic rotations with symmetric structures. Two TCs with thermodynamic profiles of larger convective available potential energy (CAPE) and maximum potential intensity (MPI) show greater interaction than those with a smaller CAPE and MPI due to the stronger tangential velocity near the TC center. In the simulations on the β plane, the two TCs do not merge, because the beta effect prevents the attraction of the two TCs by generating asymmetric motions of the TC with northwestward forcing. The relative strengths of the two TCs change with time and depend on the low-level inflow influenced by the Coriolis parameter. Similar to the results on the f plane, the two TCs only merge with the thermodynamic soundings of large CAPE and MPI.",
author = "Wook Jang and Hye-Yeong Chun",
year = "2015",
month = "1",
day = "1",
doi = "10.1002/2015JD023409",
language = "English",
volume = "120",
pages = "9173--9192",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "18",

}

Effects of thermodynamic profiles on the interaction of binary tropical cyclones. / Jang, Wook; Chun, Hye-Yeong.

In: Journal of Geophysical Research, Vol. 120, No. 18, 01.01.2015, p. 9173-9192.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of thermodynamic profiles on the interaction of binary tropical cyclones

AU - Jang, Wook

AU - Chun, Hye-Yeong

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The interactions between idealized binary tropical cyclones (TCs) on f and β planes with different separation distance and thermodynamic soundings obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data averaged over the western North Pacific are investigated through ensemble three-dimensional numerical simulations with a horizontal resolution of 10 km in a single domain. In the simulations on the f plane, two TCs show mutual cyclonic rotations with symmetric structures. Two TCs with thermodynamic profiles of larger convective available potential energy (CAPE) and maximum potential intensity (MPI) show greater interaction than those with a smaller CAPE and MPI due to the stronger tangential velocity near the TC center. In the simulations on the β plane, the two TCs do not merge, because the beta effect prevents the attraction of the two TCs by generating asymmetric motions of the TC with northwestward forcing. The relative strengths of the two TCs change with time and depend on the low-level inflow influenced by the Coriolis parameter. Similar to the results on the f plane, the two TCs only merge with the thermodynamic soundings of large CAPE and MPI.

AB - The interactions between idealized binary tropical cyclones (TCs) on f and β planes with different separation distance and thermodynamic soundings obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data averaged over the western North Pacific are investigated through ensemble three-dimensional numerical simulations with a horizontal resolution of 10 km in a single domain. In the simulations on the f plane, two TCs show mutual cyclonic rotations with symmetric structures. Two TCs with thermodynamic profiles of larger convective available potential energy (CAPE) and maximum potential intensity (MPI) show greater interaction than those with a smaller CAPE and MPI due to the stronger tangential velocity near the TC center. In the simulations on the β plane, the two TCs do not merge, because the beta effect prevents the attraction of the two TCs by generating asymmetric motions of the TC with northwestward forcing. The relative strengths of the two TCs change with time and depend on the low-level inflow influenced by the Coriolis parameter. Similar to the results on the f plane, the two TCs only merge with the thermodynamic soundings of large CAPE and MPI.

UR - http://www.scopus.com/inward/record.url?scp=84944931238&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84944931238&partnerID=8YFLogxK

U2 - 10.1002/2015JD023409

DO - 10.1002/2015JD023409

M3 - Article

VL - 120

SP - 9173

EP - 9192

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 18

ER -