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High-Order Solar Migrating Tides Quench at SSW Onsets 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (6)
作者:  He, Maosheng;  Forbes, Jeffrey M.;  Chau, Jorge;  Li, Guozhu;  Wan, Weixing;  Korotyshkin, Dmitry, V
收藏  |  浏览/下载：29/0  |  提交时间：2020/07/02
sudden stratospheric warming (SSW)  migrating solar tides  mesosphere  zonal wavenumber  
Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen 期刊论文
NATURE, 2020, 577 (7792) : 631-+
作者:  Zhuang, Zhe;  Yu, Jin-Quan
收藏  |  浏览/下载：40/0  |  提交时间：2020/07/03

Hydrogen has been an essential element in the development of atomic, molecular and condensed matter physics(1). It is predicted that hydrogen should have a metal state(2)  however, understanding the properties of dense hydrogen has been more complex than originally thought, because under extreme conditions the electrons and protons are strongly coupled to each other and ultimately must both be treated as quantum particles(3,4). Therefore, how and when molecular solid hydrogen may transform into a metal is an open question. Although the quest for metal hydrogen has pushed major developments in modern experimental high-pressure physics, the various claims of its observation remain unconfirmed(5-7). Here a discontinuous change of the direct bandgap of hydrogen, from 0.6 electronvolts to below 0.1 electronvolts, is observed near 425 gigapascals. This result is most probably associated with the formation of the metallic state because the nucleus zero-point energy is larger than this lowest bandgap value. Pressures above 400 gigapascals are achieved with the recently developed toroidal diamond anvil cell(8), and the structural changes and electronic properties of dense solid hydrogen at 80 kelvin are probed using synchrotron infrared absorption spectroscopy. The continuous downward shifts of the vibron wavenumber and the direct bandgap with increased pressure point to the stability of phase-III hydrogen up to 425 gigapascals. The present data suggest that metallization of hydrogen proceeds within the molecular solid, in good agreement with previous calculations that capture many-body electronic correlations(9).


  
Wavenumber Analysis of EMIC Waves 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (11) : 5689-5697
作者:  Chen, Lunjin;  Zhu, Hui;  Zhang, Xiaojia
收藏  |  浏览/下载：25/0  |  提交时间：2019/11/26
EMIC  wavenumber  wave particle interaction  radiation belt  
On unravelling mechanism of interplay between cloud and large scale circulation: a grey area in climate science 期刊论文
CLIMATE DYNAMICS, 2019, 52: 1547-1568
作者:  De, S.;  Agarwal, N. K.;  Hazra, Anupam;  Chaudhari, Hemantkumar S.;  Sahai, A. K.
收藏  |  浏览/下载：22/0  |  提交时间：2019/04/09
Cloud  Critical relative humidity  Monsoon  Internal dynamics  Kinetic energy  Scale interaction  Frequency domain  Wavenumber domain  
Anomalous Behavior of Vertical Wavenumber Spectra Over a Tropical Station of India 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (22) : 12553-12559
作者:  Ghosh, Priyanka;  Ramkumar, T. K.;  Sharma, Som
收藏  |  浏览/下载：19/0  |  提交时间：2019/04/09
distinct vertical wavenumber spectra  radar  positive slope at the higher end of the vertical wavenumber spectra  many negative slopes beyond turbulence region  
Impact of northern Eurasian snow cover in autumn on the warm Arctic-cold Eurasia pattern during the following January and its linkage to stationary planetary waves 期刊论文
CLIMATE DYNAMICS, 2018, 50: 1993-2006
作者:  Xu, Xinping;  He, Shengping;  Li, Fei;  Wang, Huijun
收藏  |  浏览/下载：25/0  |  提交时间：2019/04/09
Snow cover  Warm Arctic-cold Eurasia  Stationary planetary waves  Zonal wavenumber-1  
Extraordinary Features of the Planetary Wave Propagation During the Boreal Winter 2013/2014 and the Zonal Wave Number Two Predominance 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2017, 122 (21)
作者:  Harada, Y.;  Hirooka, T.
收藏  |  浏览/下载：12/0  |  提交时间：2019/04/09
sudden stratospheric warming  stratosphere  zonal wavenumber two  wave packet propagation  Aleutian High  planetary wave