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Discovery of New-Structured Post-Spinel MgFe2O4: Crystal Structure and High-Pressure Phase Relations 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (6)
作者:  Ishii, Takayuki;  Miyajima, Nobuyoshi;  Sinmyo, Ryosuke;  Kojitani, Hiroshi;  Mori, Daisuke;  Inaguma, Yoshiyuki;  Akaogi, Masaki
收藏  |  浏览/下载：8/0  |  提交时间：2020/07/02
high pressure  Rietveld analysis  phase transition  spinel  mantle  magnesioferrite  
Elevated Seismic Hazard in Kansas Due to High-Volume Injections in Oklahoma 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (5)
作者:  Zhai, Guang;  Shirzaei, Manoochchr;  Manga, Michael
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/02
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：25/0  |  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).


  
Across-Fault Velocity Gradients and Slip Behavior of the San Andreas Fault Near Parkfield 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (1)
作者:  Agostinetti, N. Piana;  Giacomuzzi, G.;  Chiarabba, C.
收藏  |  浏览/下载：1/0  |  提交时间：2020/07/02
MMS Study of the Structure of Ion-Scale Flux Ropes in the Earth's Cross-Tail Current Sheet 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (12) : 6168-6177
作者:  Sun, W. J.;  Slavin, J. A.;  Tian, A. M.;  Bai, S. C.;  Poh, G. K.;  Akhavan-Tafti, M.;  Lu, San;  Yao, S. T.;  Le, G.;  Nakamura, R.;  Giles, B. L.;  Burch, J. L.
收藏  |  浏览/下载：6/0  |  提交时间：2019/11/26
ion-scale FRs  magnetic structure  plasma depletion  evolution  
In situ X-ray diffraction measurement of shock-wave-driven twinning and lattice dynamics 期刊论文
NATURE, 2017, 550 (7677) : 496-+
作者:  Wehrenberg, C. E.;  McGonegle, D.;  Bolme, C.;  Higginbotham, A.;  Lazicki, A.;  Lee, H. J.;  Nagler, B.;  Park, H. -S.;  Remington, B. A.;  Rudd, R. E.;  Sliwa, M.;  Suggit, M.;  Swift, D.;  Tavella, F.;  Zepeda-Ruiz, L.;  Wark, J. S.
收藏  |  浏览/下载：11/0  |  提交时间：2019/11/27
Assimilating INSAT-3D Thermal Infrared Window Imager Observation With the Particle Filter: A Case Study for Vardah Cyclone 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (4) : 1897-1911
作者:  Kumar, Prashant;  Shukla, Munn V.
收藏  |  浏览/下载：11/0  |  提交时间：2019/04/09
cloudy radiance  WRF model  window IR channel  particle filter  model physics  
On the Velocity-Current Relation of Positive Leader Discharges 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (1) : 512-518
作者:  Zhao, X.;  Liu, L.;  Wang, X.;  Liu, L.;  Qu, L.;  Jia, L.;  He, J.;  Luo, B.;  Chen, H.
收藏  |  浏览/下载：6/0  |  提交时间：2019/04/09
positive leader discharge  leader velocity  leader current  natural lightning  high-voltage experiment  numerical simulation  
Prediction of summer extreme precipitation over the middle and lower reaches of the Yangtze River basin 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019, 39 (1) : 375-383
作者:  Liu, Lu;  Ning, Liang;  Liu, Jian;  Yan, Mi;  Sun, Weiyi
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09
extreme precipitation  physics-based empirical model  seasonal precipitation  
Predictability of summer extreme precipitation days over eastern China 期刊论文
CLIMATE DYNAMICS, 2018, 51: 4543-4554
作者:  Li, Juan;  Wang, Bin
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09
Extreme precipitation  Eastern China  Physics-based empirical model  Seasonal predictability  Seasonal prediction  East Asian summer monsoon