نتایج جستجو برای: and prevailing winds

تعداد نتایج: 16829445  

2016
Arnoldo Valle-Levinson Larry P. Atkinson Dante Figueroa Leonardo Castro

This Article is brought to you for free and open access by the Center for Coastal Physical Oceanography at ODU Digital Commons. It has been accepted for inclusion in CCPO Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Valle-Levinson, Arnoldo; Atkinson, Larry P.; Figueroa, Dante; and Castro, Leo...

2004
G. de Boer E. W. Eloranta G. J. Tripoli

As a part of the Lake-Induced Convection Experiments (Lake-ICE), on December 21, 1997 the University of Wisconsin Volume Imaging Lidar (UW-VIL) observed a visually stunning example of a shallow (~75-100 m) land breeze circulation over Lake Michigan. Backscatter returns revealed a steady offshore flow extending 1.5 to 4 km offshore, at which point it met the prevailing winds, which directly oppo...

Journal: :IJDSN 2010
David Hamel Matthew Chwastek Saturnino Garcia Bakhtier Farouk Moshe Kam Kapil R. Dandekar

We simulated a sensor network that detects and tracks the release of harmful airborne contaminants in an urban environment. The simulation determines sensor placement in that environment. The effort required integration of models from computational fluid dynamics (CFDs), combinatorial optimization, and population mobility dynamics. These CFD models, coupled with population mobility models, faci...

1998
C. Jacobi

At the Collm Observatory of the University of Leipzig LF D1 low-frequency total re ̄ection nighttime wind measurements have been carried out continuously for more than two decades. Using a multiple regression analysis to derive prevailing winds, tides and the quasi-2-day wave from the half-hourly mean values of the horizontal wind components, monthly mean values of mesopause wind parameters are ...

The occurrence of erosive winds in the North West of Iran always causes damage to urban facilities and agricultural fields. By identifying behavior and synoptic patterns of Strong winds, necessary strategies can be chosen to deal with this destructive phenomenon. In this study, the fastest erosive winds and its steadiness coefficient were analyzed in selected stations of North West of Iran. Sui...

2002
B. Wang

This study explains why a number of El Nino properties (period, amplitude, structure, and propagation) have changed in a coherent manner since the late 1970s and why these changes had almost concurred with the Pacific decadal climate shift. Evidence is presented to show that from the pre-shift (1961–1975) to the postshift (1981–1995) epoch, significant changes in the tropical Pacific are found ...

2004
H. Y. Mok M. C. Wong Y. H. Kwok

The Hong Kong Observatory has been continuously monitoring the environmental gamma absorbed dose rates in the air in Hong Kong since the late 1980’s. Spatial and seasonal variations in the environmental gamma absorbed dose rate in the air in Hong Kong have been evaluated. The spatial variations are found to be related to the variation in the geological structure across the territory and the sea...

2015
Alejandro Salcido Susana Carreón-Sierra Teodoro Georgiadis

Urban transformation and expansion in Mexico City continuously affect its urban morphology, and therefore the modes of wind circulation inside it and their occurrence probabilities. Knowledge on these topics is an important issue for urban planning and for other urban studies, such as air quality assessment. In this paper, using a lattice wind model at a meso-β scale, we develop a simple descri...

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