Results 251 to 260 of about 49,266 (284)

Polar amplification dominated by local forcing and feedbacks

Nature Climate Change, 2018
The surface temperature response to greenhouse gas forcing displays a characteristic pattern of polar-amplified warming1,2,3,4,5, particularly in the Northern Hemisphere. However, the causes of this polar amplification are still debated.
Malte F Stuecker, Cecilia M Bitz, Kyle C Armour   +2 more
exaly   +2 more sources

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Polarization-Dependent Amplification in Planar Waveguides

Conference on Lasers and Electro-Optics Europe, 1996
We model a planar waveguide with an anisotropic active layer (i.e. with permittivity ϵ. a tensor) by using a scattering approach. The anisotropy of the permittivity can e.g. arise through the presence of strained quantum wells. It is calculated how much anisotropy is needed to get. a gain that is polarisation-independent.
Visser, T.D., Lenstra, D., Blok, H.P.
openaire   +2 more sources

Modeled Influence of Land Ice and CO2on Polar Amplification and Paleoclimate Sensitivity During the Past 5 Million Years [PDF]

Paleoceanography and Paleoclimatology, 2018
Polar amplification and paleoclimate sensitivity (S) have been the subject of many paleoclimate studies. While earlier studies inferred them as single constant parameters of the climate system, there are now indications that both are conditioned by the ...
Lennert B Stap, Roderik S W Van De Wal, Bas De Boer   +2 more
exaly   +2 more sources

Amplification of spin-current polarization

Applied Physics Letters, 2007
A ferromagnet/semiconductor based electrically controlled spin-current amplifier using a dual-drain nonlocal lateral spin valve is demonstrated. The spin polarization injected by the source into the channel is amplified at the second drain contact. An amplified current spin polarization of 100% is measured.
D. Saha, M. Holub, P. Bhattacharya
openaire   +1 more source

On the causes of mid-Pliocene warmth and polar amplification [PDF]

Earth and Planetary Science Letters, 2012
The mid-Pliocene (~ 3 to 3.3 Ma ago), is a period of sustained global warmth in comparison to the late Quaternary (0 to ~ 1 Ma ago), and has potential to inform predictions of long-term future climate change.
Daniel J Lunt, Alan M Haywood, Gavin A Schmidt   +2 more
exaly   +2 more sources

Acoustic wave amplification in polar semiconductors

Physics Letters A, 1974
Abstract The ratio λ of the damping coefficient of the two phonon to the one phonon process in a polar semiconductor, is calculated following the kinetic method. It is found that λ is of the order of 10-1, if the band gap is of the order of polar optical phonon energy.
S.S Kubakaddi, B.S Krishnamurthy
openaire   +1 more source

Polar amplification in a coupled climate model with locked albedo

Climate Dynamics, 2009
In recent years, a substantial reduction of the sea ice in the Arctic has been observed. At the same time, the near-surface air in this region is warming at a rate almost twice as large as the global average—this phenomenon is known as the Arctic ...
Rune G Graversen, Minghuai Wang, Graversen Rune Grand   +2 more
exaly   +2 more sources

Polarized Backward Raman Amplification in Randomly Birefringent Fibers

Journal of Lightwave Technology, 2006
In this paper, a model describing the vector interaction of an intense backward-propagating Raman pump and a weak forward-propagating Stokes signal in randomly birefringent fibers is proposed. The model accounts for the losses, the Raman interaction, and the linear and nonlinear birefringence.
GALTAROSSA, ANDREA, PALMIERI, LUCA, SANTAGIUSTINA, MARCO, URSINI, LEONORA   +3 more
openaire   +1 more source

Polarization Signal Amplification of 2D GeSe‐Based Polarization‐Sensitive Photodetectors

Advanced Materials
Abstract Polarization‐sensitive photodetectors, resolving light intensity, wavelength, and polarization states, enable the characterization of probing microstructure, internal stress, and compositional heterogeneity. Polarizer‐free polarization‐sensitive photodetectors based on in‐plane anisotropic 2D semiconductors offer potential ...
Kexin He, Wenhao Ran, Shaodi Xu, Jie Wen, Siqi Qiu, Tingwei Liu, Kaiyao Xin, Yali Yu, Duan‐Yang Liu, Qianqian Huang, Guozhen Shen, Zhongming Wei, Ziqi Zhou   +12 more
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Amplification of coherent polar vibrations in biopolymers: Fröhlich condensate

Physical Review E, 1993
We consider the nonequilibrium and dissipative evolution, and the steady state of the population of vibrational polar modes in a chain of biomolecules. These polar modes are excited through a coupling with a metabolic pumping source and are in anharmonic interaction with an elastic continuum.
, Mesquita, , Vasconcellos, , Luzzi
openaire   +2 more sources