First-principles calculations of electron states of a silicon nanowire with 100,000 atoms on the K computer

Hasegawa, Yukihiro; Iwata, Junichi; Tsuji, Masashi; Takahashi, Daisuke; Oshiyama, Atsushi; Minami, Kazuo; Boku, Taisuke; Shoji, Fumiyoshi; Uno, Atsuya; Kurokawa, Motoyoshi; Inoue, Hikaru; Miyoshi, Ikuo; Yokokawa, Mitsuo

doi:10.1145/2063384.2063386

Cited by 70 publications

(47 citation statements)

References 10 publications

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“…As for the difference between the CTL and GW experiments, the convective mass flux decreases in the middle troposphere below an altitude of 5 km, while it increases above 9 km. The decrease in the middle and lower troposphere is consistent with the theory of a weakening overturning circulation (Satoh and Hayashi 1992;Held and Soden 2006;Vecchi and Soden 2007), and the increase in the upper troposphere is associated with the elevation of the tropopause due to global warming (Manabe and Wetherald 1967). Figure 2b shows the vertical profiles of R for the CTL and GW experiments.…”

Section: Tropical Convective Mass Flux and Contributionsupporting

confidence: 77%

“…The energy balance Q = LP was incorporated by neglecting the sensible heat flux at the surface, and a moist adiabatic profile of the tropospheric stratification was assumed. Because the temperature dependency is larger for q than for Q, it is expected that M decreases as temperature increases (Held and Soden 2006).…”

Section: Tropical Convective Mass Flux and Contributionmentioning

confidence: 99%

“…As for large-scale overturning circulations such as the Hadley and Walker circulations, a weakening in the strength of the circulations under climate changes is generally expected by theoretical arguments (Satoh and Hayashi 1992;Held and Soden 2006) and has also been shown by observational evidence (Tanaka et al 2004;Tokinaga et al 2004). For the future change in the global frequency of TCs, however, only a few theoretical explanations have been proposed (Knutson et al 2010).…”

Section: Introductionmentioning

confidence: 98%

“…A set of two simulations was conducted under present and future conditions to examine the change in the properties of TCs. The integration period of NICAM is for the first time extended to 20 years, which is achieved by using a recently developed supercomputer (the K computer; Hasegawa et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Constraint on Future Change in Global Frequency of Tropical Cyclones due to Global Warming

Satoh

Yamada

Sugi³

et al. 2015

Journal of the Meteorological Society of Japan

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Section: Tropical Convective Mass Flux and Contributionsupporting

confidence: 77%

Section: Tropical Convective Mass Flux and Contributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Constraint on Future Change in Global Frequency of Tropical Cyclones due to Global Warming

Satoh

Yamada

Sugi³

et al. 2015

Journal of the Meteorological Society of Japan

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“…Third, in lateral directions, isolated boundary conditions are available as well as periodic ones, which enables us to treat electrodes as leads. Furthermore, the algorithm of the RSFD method is suitable for massively parallel computing [21].…”

mentioning

confidence: 99%

First-principles calculation method for electron transport based on the grid Lippmann-Schwinger equation

et al. 2015

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We develop a first-principles electron-transport simulator based on the Lippmann-Schwinger (LS) equation within the framework of the real-space finite-difference scheme. In our fully real-space-based LS (grid LS) method, the ratio expression technique for the scattering wave functions and the Green's function elements of the reference system is employed to avoid numerical collapse. Furthermore, we present analytical expressions and/or prominent calculation procedures for the retarded Green's function, which are utilized in the grid LS approach. In order to demonstrate the performance of the grid LS method, we simulate the electron-transport properties of the semiconductor-oxide interfaces sandwiched between semi-infinite jellium electrodes. The results confirm that the leakage current through the (001)Si-SiO 2 model becomes much larger when the dangling-bond state is induced by a defect in the oxygen layer, while that through the (001)Ge-GeO 2 model is insensitive to the dangling bond state.

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A Madden‐Julian Oscillation event remotely accelerates ocean upwelling to abruptly terminate the 1997/1998 super El Niño

Miyakawa

Yashiro

Suzuki

et al. 2017

Geophysical Research Letters

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The termination of the superintense 1997/1998 El Niño was extraordinarily abrupt. The May 1998 Madden‐Julian Oscillation (MJO), a massive complex of stormy tropical clouds, is among possible contributors to the abrupt termination. Despite having been sensationally proposed 18 years ago, the role of the MJO remained controversial and speculative because of the difficulty of sufficiently simulating the El Niño and MJO simultaneously. An ensemble simulation series using a newly developed, fully ocean‐coupled version of a global cloud system resolving numerical model replicated the specific atmosphere and ocean conditions of May 1998 in unprecedented detail, extending the prediction skill of the MJO to 46 days. Simulation ensemble members with stronger MJO activities over the Maritime Continent experienced quicker sea surface temperature drop in the eastern Pacific, confirming that the easterly winds associated with the remote MJO accelerated ocean upwelling to abruptly terminate the El Niño.

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First-principles calculations of electron states of a silicon nanowire with 100,000 atoms on the K computer

Cited by 70 publications

References 10 publications

Constraint on Future Change in Global Frequency of Tropical Cyclones due to Global Warming

Constraint on Future Change in Global Frequency of Tropical Cyclones due to Global Warming

First-principles calculation method for electron transport based on the grid Lippmann-Schwinger equation

A Madden‐Julian Oscillation event remotely accelerates ocean upwelling to abruptly terminate the 1997/1998 super El Niño

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