Zobrazeno 1 - 10
of 182
pro vyhledávání: '"H.-Y. Chun"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 10869-10881 (2023)
This study explores the abrupt split of the polar vortex in the upper stratosphere prior to a recent sudden stratospheric warming event on 5 January 2021 (SSW21) and the mechanisms of vortex preconditioning by using the Modern-Era Retrospective Analy
Externí odkaz:
https://doaj.org/article/212c37bac88a48dd8076497b0f8fe9f2
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 2277-2298 (2022)
The cube root of the energy dissipation rate (EDR), as a standard reporting metric of atmospheric turbulence, is estimated using 1 Hz quick access recorder (QAR) data from Korean-based national air carriers with two different types of aircraft (Boein
Externí odkaz:
https://doaj.org/article/07a41379c1b5466f810f847309d16e23
Autor:
M.-J. Kang, H.-Y. Chun
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 9839-9857 (2021)
In January 2020, unexpected easterly winds developed in the downward-propagating westerly quasi-biennial oscillation (QBO) phase. This event corresponds to the second QBO disruption in history, and it occurred 4 years after the first disruption of 20
Externí odkaz:
https://doaj.org/article/cb984ec363c6453da3f7c026dd8e0128
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 14669-14693 (2020)
In February 2016, the descent of the westerly phase of the quasi-biennial oscillation (QBO) was unprecedentedly disrupted by the development of easterly winds. Previous studies have shown that extratropical Rossby waves propagating into the deep trop
Externí odkaz:
https://doaj.org/article/22e0855165f949ecb55431dd9f74cc2f
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 7617-7644 (2020)
Effects of realistic propagation of gravity waves (GWs) on distribution of GW pseudomomentum fluxes are explored using a global ray-tracing model for the 2009 sudden stratospheric warming (SSW) event. Four-dimensional (4D; x–z and t) and two-dimens
Externí odkaz:
https://doaj.org/article/d1ccd428d59f421787a0352a0c4e7844
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 1373-1385 (2020)
Some of the Aircraft Meteorological Data Relay (AMDAR) data include a turbulence metric of the derived equivalent vertical gust (DEVG), in addition to wind and temperature. As the cube root of the eddy dissipation rate (EDR) is the International Civi
Externí odkaz:
https://doaj.org/article/eb76adac917f40ebac654e100ebd6fdc
Autor:
N. Butchart, J. A. Anstey, K. Hamilton, S. Osprey, C. McLandress, A. C. Bushell, Y. Kawatani, Y.-H. Kim, F. Lott, J. Scinocca, T. N. Stockdale, M. Andrews, O. Bellprat, P. Braesicke, C. Cagnazzo, C.-C. Chen, H.-Y. Chun, M. Dobrynin, R. R. Garcia, J. Garcia-Serrano, L. J. Gray, L. Holt, T. Kerzenmacher, H. Naoe, H. Pohlmann, J. H. Richter, A. A. Scaife, V. Schenzinger, F. Serva, S. Versick, S. Watanabe, K. Yoshida, S. Yukimoto
Publikováno v:
Geoscientific Model Development, Vol 11, Pp 1009-1032 (2018)
The Stratosphere–troposphere Processes And their Role in Climate (SPARC) Quasi-Biennial Oscillation initiative (QBOi) aims to improve the fidelity of tropical stratospheric variability in general circulation and Earth system models by conducting
Externí odkaz:
https://doaj.org/article/acaf378a474f4633bd3278c0761b5b56
Autor:
Q. T. Trinh, S. Kalisch, P. Preusse, M. Ern, H.-Y. Chun, S. D. Eckermann, M.-J. Kang, M. Riese
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 7335-7356 (2016)
Convection as one dominant source of atmospheric gravity waves (GWs) has been the focus of investigation over recent years. However, its spatial and temporal forcing scales are not well known. In this work we address this open issue by a systemati
Externí odkaz:
https://doaj.org/article/8efd01ef0e8c492589b3123034940935
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 4799-4815 (2016)
An idealized baroclinic instability case is simulated using a ∼ 10 km resolution global model to investigate the characteristics of gravity waves generated in the baroclinic life cycle. Three groups of gravity waves appear around the high-latitu
Externí odkaz:
https://doaj.org/article/46416460c5f34f31b58d747342dabc78
Autor:
Y.-H. Kim, H.-Y. Chun
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 12, Pp 6577-6587 (2015)
The momentum forcing of the QBO (quasi-biennial oscillation) by equatorial waves is estimated using recent reanalyses. Based on the estimation using the conventional pressure-level data sets, the forcing by the Kelvin waves (3–9 m s−1 month−
Externí odkaz:
https://doaj.org/article/70063152013e4e95bfc3aeb812208d57