Stochastic tipping points in climate dynamics
Stefano Pierini
A crucial question recently raised in climate dynamics concerns abrupt climate transitions: Are they due to a tipping point (TP) being exceeded, or is fast noisy dynamics the cause of their excitation? In this respect, a case study based on a low-order ocean model is developed to show that in an exc ... [Phys. Rev. E 85, 027101 ] published .
Ocean acidification and coral reefs
Stephen G. Benka
Abstract not available. [Phys. Today 65, 20 (2012)] published Wed Feb 1, 2012.
Crevasses may make ice shelves more stable
Richard J. Fitzgerald
Abstract not available. [Phys. Today 65, 20 (2012)] published Wed Feb 1, 2012.
Multiple zonal jets on the polar beta plane
A. G. Slavin and Y. D. Afanasyev
The mechanism of the formation of multiple quasi-zonal jets as well as their meridional scaling is investigated for a range of control parameters including the radius of deformation and the parameter which characterizes the polar beta-plane. Flows in a rotating cylindrical domain where the depth of ... [Phys. Fluids 24, 016603 (2012)] published Thu Jan 26, 2012.
SEAM UPDATE: ELASTIC SIMULATIONS
Michael Fehler
SEAM is in the process of obtaining bids for elastic simulation on the SEAM elastic deepwater model that was constructed using funding from the Research Partnership to Secure Energy for America (RPSEA subcontract # 07121-2001). The model is an extension of the SEAM Phase I model that was originally ... [The Leading Edge 31, 24 (2012)] published Tue Jan 10, 2012.
Radiation Shielding Properties of Some Marbles in Turkey
K. Gunoglu and İ. Akkurt
Especially after development of technology, radiation started to be used in a large fields such as medicine, industry and energy. Using radiation in those fields bring hazordous effect of radition into humancell. Thus radiation protection becomes important in physics. Although there are three ways f ... [AIP Conf. Proc. 1400, 502 (2011)] published Wed Dec 28, 2011.
Full-Scale Physical Modeling Of The System Granular MediaSteel Sheet Piling
M. P. Dubrovskyy, G. N. Meshcheryakov, V. N. Petrosyan, and O. M. Dubrovska
This paper considers the problem of determination of real parameters of the cross-sectional values of sheet piling walls made of U-profile piles (moment of inertia and section modulus) and their drivability regarding piles interaction with granular media (for example, sandy soil). Among main factors ... [AIP Conf. Proc. 1400, 380 (2011)] published Wed Dec 28, 2011.
General Law of Electromagnetic Radiation Conversion Efficiency in Systems with Linear and Non-Linear Irreversibility
Yu. P. Chukova
It is shown, that the efficiency of conversion of solar radiation obeys the same law in alive and nonliving (technical) systems. For different processes in alive systems the evolution has selected different ranges of solar intensity and different conditions of irreversibility. ... [AIP Conf. Proc. 1400, 333 (2011)] published Wed Dec 28, 2011.
The stability of the mesospheric plasma layer
B. P. Pandey and S. V. Vladimirov
The presence of micron and sub-micron size dust in the Earth's summer mesopause are a possible cause of electron density depletion. Whereas electrons in this weakly ionized and weakly magnetized layer are frozen in the magnetic field, the ions and dust are highly diffusive. This relative drift betwe ... [Phys. Plasmas 18, 122902 (2011)] published Tue Dec 27, 2011.
Mean Velocity Profile in a Sheared and Thermally Stratified Atmospheric Boundary Layer
Gabriel G. Katul, Alexandra G. Konings, and Amilcare Porporato
A stability correction function phi(zeta) that accounts for distortions to the logarithmic mean velocity profile (MVP) in the lower atmosphere caused by thermal stratification was proposed by Monin and Obukhov in the 1950s using dimensional analysis. Its universal character was established from many ... [Phys. Rev. Lett. 107, 268502 ] published .
Possible Explanation of the Atmospheric Kinetic and Potential Energy Spectra
Andreas Vallgren, Enrico Deusebio, and Erik Lindborg
We hypothesize that the observed wave number spectra of kinetic and potential energy in the atmosphere can be explained by assuming that there are two related cascade processes emanating from the same large-scale energy source, a downscale cascade of potential enstrophy, giving rise to the k spectru ... [Phys. Rev. Lett. 107, 268501 ] published .
Large-Eddy Simulation of Shallow Water Langmuir Turbulence Using Isogeometric Analysis and the Residual-Based Variational Multiscale Method
Andres E. Tejada-Martinez, Ido Akkerman, and Yuri Bazilevs
We develop a residual-based variational multiscale (RBVMS) method based on isogeometric analysis for large-eddy simulation (LES) of wind-driven shear flow with Langmuir circulation (LC). Isogeometric analysis refers to our use of NURBS (Non-Uniform Rational B-splines) basis functions which have been ... [J. Appl. Mech. 79, 010909 (2011)] published Tue Dec 13, 2011.
Relationship between land use/cover and surface temperatures in the urban agglomeration of Cuiaba-Varzea Grande, Central Brazil
Ivan Julio Apolonio Callejas, Angela Santana de Oliveira, Flavia Maria de Moura Santos, Luciane Cleonice Durante, Marta Cristina de Jesus Albuquerque Nogueira et al.
We focus on the surface urban heat island (SUHI) and the spatiotemporal relationship between land use and surface temperatures (T) in Cuiaba-Varzea Grande, Mato Grosso, one of the major urban agglomerations of central-western Brazil, which has suffered intense urbanization processes since the 1960s. ... [J. Appl. Remote Sens. 5, 053569 (2011)] published Mon Dec 12, 2011.
Minimizing Variation In Outdoor CPV Power Ratings
Matthew Muller, Bill Marion, Jose Rodriguez, and Sarah Kurtz
The CPV community has agreed to have both indoor and outdoor module power ratings. The indoor rating provides a repeatable measurement off the factory line while the outdoor rating provides a measure of true on-sun performance. The challenge with an outdoor rating is that conditions that impact the ... [AIP Conf. Proc. 1407, 336 (2011)] published Mon Dec 5, 2011.
Analysis Of Soiling Rates At The Victor Valley Community College CPV Site
John Bowman, Steffen Jensen, and Mark McDonald
SolFocus' product has been in operation at Victor Valley Community College at the southern edge of the Mojave Desert for more than nine months, and we have analyzed energy output and performance ratios with the goal of better understanding and mitigating the effects of soiling on energy production. ... [AIP Conf. Proc. 1407, 312 (2011)] published Mon Dec 5, 2011.
Sun -Shape and -Irradiance Profile Measurements at ESTI
Attilio Gambardella, Roberto Galleano, and Thomas Huld
The set-up for sunshape measurements consisting of a high definition, high dynamic range CCD camera and its optics, together with the analysis of main error/uncertainty sources and the system characterization procedure is here presented. Preliminary results on sun -shape and -irradiance profile meas ... [AIP Conf. Proc. 1407, 196 (2011)] published Mon Dec 5, 2011.
Qualitative Analysis of Nutrient-Phytoplankton Models
Qinghua Cai, Zakaria Mohamad, and Yuan Yuan
We propose two nutrient-phytoplankton models with instantaneous and time delayed recyclings, investigate the dynamics and examine the responses to model complexities. We use geometrical and analytical methods to discuss the existence and stability of the possible steady state solutions and study the ... [AIP Conf. Proc. 1368, 143 (2011)] published Fri Dec 2, 2011.
A Linear Programming Network Analysis of Phosphorus Reduction Strategies for the Lake Simcoe Watershed
James MacLellan, Martin Bunch, and Kaz Higuchi
To promote the health of the Lake Simcoe watershed, the Lake Simcoe Phosphorus Reduction Strategy [1] has adopted an explicit goal of reducing annual phosphorus loadings from the current average of 72T/yr to a target of 44T/yr. Unfortunately, phosphorus is the product of numerous and varied human pr ... [AIP Conf. Proc. 1368, 125 (2011)] published Fri Dec 2, 2011.
Charge Distribution in Mesospheric Clouds
Shikha Misra, S. K. Mishra, and M. S. Sodha
This work presents an analytical model for the physical understanding of the charge distribution on pure (with high work function) and dirty (with low work function) ice dust particles in polar mesospheric clouds PMCs (NLCs and PMSEs). The analysis is based on number and energy balance of constituen ... [AIP Conf. Proc. 1397, 417 (2011)] published Wed Nov 30, 2011.
Action of nanosecond electric pulses for glow discharge dusty plasma structures
V. N. Naumkin, D. A. Fatkullin, V. I. Molotkov, V. Ya. Pecherkin, D. N. Polyakov et al.
Within researching processes of appearance of ordered structures and phase transitions in non-ideal dusty plasma the behavior of dust structures under the influence of nanosecond electric pulses in the DC glow discharge has been studied. The search of resonance effects, stabilization and precipitati ... [AIP Conf. Proc. 1397, 381 (2011)] published Wed Nov 30, 2011.
Atmospheric Composition of the Balkan Region and Bulgaria. Study of the Contribution of Biogenic Emissions
G. K. Gadzhev, D. E. Syrakov, K. G. Ganev, A. D. Brandiyska, N. G. Miloshev et al.
The present work aims at studying the local to regional atmospheric pollution transport and transformation processes over the Balkan Peninsula and at tracking and characterizing the main pathways and processes that lead to atmospheric composition formation in the region. The US EPA Models-3 system i ... [AIP Conf. Proc. 1404, 200 (2011)] published Tue Nov 29, 2011.
Principal component proxy tracer analysis. (arXiv:1202.1999v1 [physics.ao-ph])
ePrint arXiv http://arXiv.org/
Hamiltonian description and traveling waves of the spatial Dysthe equations. (arXiv:1110.3605v2 [physics.class-ph] CROSS LISTED)
ePrint arXiv http://arXiv.org/