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DOI | 10.1175/JAS-D-19-0001.1 |
Dynamical Aquaplanet Experiments with Uniform Thermal Forcing: System Dynamics and Implications for Tropical Cyclone Genesis and Size | |
Chavas, Daniel R.1; Reed, Kevin A.2 | |
2019-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:8页码:2257-2274 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Existing hypotheses for the dynamical dependence of tropical cyclone genesis and size on latitude depend principally on the Coriolis parameter f. These hypotheses are tested via dynamical aquaplanet experiments with uniform thermal forcing in which planetary rotation rate and planetary radius are varied relative to Earth values; the control simulation is also compared to a present-day Earth simulation. Storm genesis rate collapses to a quasi-universal dependence on f that attains its maximum at the critical latitude, where the inverse-f scale and Rhines scale are equal. Minimum genesis distance from the equator is set by the equatorial Rhines (or deformation) scale and not by a minimum value of f. Outer storm size qualitatively follows the smaller of the two length scales, including a slow increase with latitude equatorward of 45 degrees in the control simulation, similar to the Earth simulation. The latitude of peak size scales with the critical latitude for varying planetary radius but not rotation rate, possibly because of the dependence of genesis specifically on f. The latitudes of peak size and peak packing density scale closely together. Results suggest that temporal effects and interstorm interaction may be significant for size dynamics. More generally, the critical latitude separates two regimes: 1) a mixed wave-cyclone equatorial belt, where wave effects are strong and the Rhines scale likely limits storm size, and 2) a cyclone-filled polar cap, where wave effects are weak and cyclones persist. The large-planet limit predicts a world nearly covered with long-lived storms, equivalent to the f plane. Overall, spherical geometry is likely important for understanding tropical cyclone genesis and size on Earthlike planets. |
英文关键词 | Dynamics Hurricanes Planetary atmospheres Tropical cyclones Hurricanes typhoons Climate models |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475399700001 |
WOS关键词 | RADIATIVE-CONVECTIVE EQUILIBRIUM ; MADDEN-JULIAN OSCILLATION ; INTENSE VORTEX MOTION ; BETA-PLANE ; EXTRATROPICAL TRANSITION ; ATMOSPHERIC MODEL ; KINETIC-ENERGY ; GLOBAL VIEW ; PART I ; RESOLUTION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/185746 |
专题 | 地球科学 |
作者单位 | 1.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA; 2.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA |
推荐引用方式 GB/T 7714 | Chavas, Daniel R.,Reed, Kevin A.. Dynamical Aquaplanet Experiments with Uniform Thermal Forcing: System Dynamics and Implications for Tropical Cyclone Genesis and Size[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(8):2257-2274. |
APA | Chavas, Daniel R.,&Reed, Kevin A..(2019).Dynamical Aquaplanet Experiments with Uniform Thermal Forcing: System Dynamics and Implications for Tropical Cyclone Genesis and Size.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(8),2257-2274. |
MLA | Chavas, Daniel R.,et al."Dynamical Aquaplanet Experiments with Uniform Thermal Forcing: System Dynamics and Implications for Tropical Cyclone Genesis and Size".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.8(2019):2257-2274. |
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