نتایج جستجو برای: average wind speed

تعداد نتایج: 636632  

2013
M. Lockwood M. J. Owens

The behavior of the Sun and near-Earth space during grand solar minima is not understood; however, the recent long and low minimum of the decadal-scale solar cycle gives some important clues, with implications for understanding the solar dynamo and predicting space weather conditions. The speed of the near-Earth solar wind and the strength of the interplanetary magnetic field (IMF) embedded wit...

2016
Edward Hanna John Penman Trausti Jónsson Grant R Bigg Halldór Björnsson Sølvi Sjúrðarson Mads A Hansen John Cappelen Robert G Bryant

Here, we analyse high-frequency (1 min) surface air temperature, mean sea-level pressure (MSLP), wind speed and direction and cloud-cover data acquired during the solar eclipse of 20 March 2015 from 76 UK Met Office weather stations, and compare the results with those from 30 weather stations in the Faroe Islands and 148 stations in Iceland. There was a statistically significant mean UK tempera...

2010
Michael S. Barton

The purpose of this paper is to demonstrate the validity of mesoscale numerical weather prediction modeling near the complex terrain at Aubrey Cliffs, Arizona, and to investigate the influence of the outer domain size employed on the computational results. Mesoscale Modeling v5 (MM5) was implemented to produce numerical wind data that was compared with experimental wind data. The results obtain...

Economic evaluation of 12 MW grid-connected wind farms and PV power plants in two regions in Northern Cyprus for electricity generation was investigated. The wind speed, sunshine duration, and solar global radiation characteristics were analyzed using monthly data collected over 17 years (2000-2016) for Girne and nine years (2008-2016) for Lefkoşa, which were measured at various heights. The re...

2018
Elliot Capp Andrea L Liebl Alexandra G Cones Andrew F Russell

Projecting population responses to climate change requires an understanding of climatic impacts on key components of reproduction. Here, we investigate the associations among breeding phenology, climate and incubation schedules in the chestnut-crowned babbler (Pomatostomus ruficeps), a 50 g passerine with female-only, intermittent incubation that typically breeds from late winter (July) to earl...

2016
Shuguang Wang

Abstract: A set of idealized cloud-permitting simulations is performed to explore the influence of small islands on precipitating convection as a function of large-scale wind speed. The islands are situated in a long, narrow ocean domain that is in radiative-convective equilibrium (RCE) as a whole, constraining the domain-average precipitation. The island occupies a small part of the domain, so...

2011
Muldi Yuhendri Mochamad Ashari Mauridhi Hery Purnomo

The Output power of wind turbine is determined by wind speed. The Output power can be adjusted by controlling the generator speed and pitch angle of wind turbine. When the wind speed below the wind turbine rated, the output power of generator can be maximized by controlling the generator speed at point of maximum power coefficient. When the wind speed above the wind turbine rated, output power ...

2016
Laurent Lombard Matthieu Valla Guillaume Canat Agnès Dolfi-Bouteyre

Long range wind lidars based on high pulse repetition frequency (PRF) fiber laser require Doppler mean frequency estimators (MFE) that are reliable up to very low CNR, and fast enough for real time display of long range wind maps. A comparison of MFEs has been performed on accumulated spectra computed on experimental data from a high PRF pulsed fibered Lidar. MFEs (maximum, centroid, matched fi...

2008
Y. Hu

Global satellite observations of lidar backscatter measurements acquired by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) mission and collocated sea surface wind speed data from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E), are used to investigate the relation between wind driven wave slope variance and sea surface wind spe...

2003
C. Wang J. D. Richardson L. F. Burlaga N. F. Ness

[1] The heliospheric magnetic field (HMF) direction, on average, conforms well to the Parker spiral. However, numerous examples of events where the HMF is oriented in nearradial directions for many hours have been reported on the basis of observations inside 5 AU from spacecraft such as ISEE-3 and Ulysses. The magnetic field data observed by Voyager 2 from launch in 1977 through the end of 1982...

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