نتایج جستجو برای: overturning moment

تعداد نتایج: 62468  

Journal: :international journal of automotive engineering 0
shojaeefard talebitooti yarmohammadisatri torabi

in this paper, a method based on binary-coded genetic algorithm is proposed to explore an optimization method, for obtaining an optimal elliptical tank. this optimization method enhances the rollover threshold of a tank vehicle, especially under partial filling conditions. minimizing the overturning moment imposed on the vehicle due to c.g. height of the liquid load, lateral acceleration and ca...

2012
Alan D. Wanamaker Paul G. Butler James D. Scourse Jan Heinemeier Jón Eiríksson Karen Luise Knudsen Christopher A. Richardson

Despite numerous investigations, the dynamical origins of the Medieval Climate Anomaly and the Little Ice Age remain uncertain. A major unresolved issue relating to internal climate dynamics is the mode and tempo of Atlantic meridional overturning circulation variability, and the significance of decadal-to-centennial scale changes in Atlantic meridional overturning circulation strength in regul...

2017
Natalie J Burls Alexey V Fedorov Daniel M Sigman Samuel L Jaccard Ralf Tiedemann Gerald H Haug

An essential element of modern ocean circulation and climate is the Atlantic meridional overturning circulation (AMOC), which includes deep-water formation in the subarctic North Atlantic. However, a comparable overturning circulation is absent in the Pacific, the world's largest ocean, where relatively fresh surface waters inhibit North Pacific deep convection. We present complementary measure...

2004
WILCO HAZELEGER RICHARD SEAGER MARK A. CANE NAOMI H. NAIK

Pacific Ocean oceanic heat transport is studied in an ocean model coupled to an atmospheric mixed-layer model. The shallow meridional overturning circulation cells in the Tropics and subtropics transport heat away from the equator. The heat transport by the horizontal gyre circulation in the Tropics is smaller and directed toward the equator. The response of the Pacific oceanic heat transport t...

Journal: :Annals of botany 2008
Thierry Fourcaud Jin-Nan Ji Zhi-Qiang Zhang Alexia Stokes

BACKGROUND AND AIMS The Finite Element Method (FEM) has been used in recent years to simulate overturning processes in trees. This study aimed at using FEM to determine the role of individual roots in tree anchorage with regard to different rooting patterns, and to estimate stress distribution in the soil and roots during overturning. METHODS The FEM was used to carry out 2-D simulations of t...

2009
PAUL SPENCE OLEG A. SAENKO MICHAEL EBY ANDREW J. WEAVER

Four versions of the same global climate model, with horizontal resolution ranging from 1.88 3 3.68 to 0.28 3 0.48, are employed to evaluate the resolution dependence of the Southern Ocean meridional overturning circulation. At coarse resolutions North Atlantic Deep Water tends to upwell diabatically at low latitudes, so that the Southern Ocean is weakly coupled with the rest of the ocean. As r...

2009
Graham O. Hughes Andrew McC. Hogg Ross W. Griffiths

The overturning circulation of the global oceans is examined from an energetics viewpoint. The general framework of Winters et al. (1995) for stratified turbulence is used, first to highlight the importance of available potential energy in facilitating the transfer of kinetic energy to the background potential energy (defined as the adiabatically-rearranged state with no motion). Next, it is sh...

2017
Marianna Linz R. Alan Plumb Edwin P. Gerber Florian J. Haenel Gabriele Stiller Douglas E. Kinnison Alison Ming Jessica L. Neu

The distribution of gases such as ozone and water vapour in the stratosphere - which affect surface climate - is influenced by the meridional overturning of mass in the stratosphere, the Brewer-Dobson circulation. However, observation-based estimates of its global strength are difficult to obtain. Here we present two calculations of the mean strength of the meridional overturning of the stratos...

2005
JOHANN H. JUNGCLAUS HELMUTH HAAK MOJIB LATIF UWE MIKOLAJEWICZ

Analyses of a 500-yr control integration with the non-flux-adjusted coupled atmosphere–sea ice–ocean model ECHAM5/Max-Planck-Institute Ocean Model (MPI-OM) show pronounced multidecadal fluctuations of the Atlantic overturning circulation and the associated meridional heat transport. The period of the oscillations is about 70–80 yr. The low-frequency variability of the meridional overturning cir...

Journal: :Nature communications 2014
Louisa I Bradtmiller Jerry F McManus Laura F Robinson

The strength of Atlantic meridional overturning circulation is believed to affect the climate over glacial-interglacial and millennial timescales. The marine sedimentary (231)Pa/(230)Th ratio is a promising paleocirculation proxy, but local particle effects may bias individual reconstructions. Here we present new Atlantic sedimentary (231)Pa/(230)Th data from the Holocene, the last glacial maxi...

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