搜索结果: 31-45 共查到“理学 Low-Frequency”相关记录112条 . 查询时间(0.032 秒)
Low-frequency linear waves and instabilities in uniform and stratified plasmas:the role of kinetic effects
Low-frequency linear waves uniform and stratified plasmas kinetic effects
2009/11/11
We review the basic approximations underlying magnetohydrodynamic (MHD) theory, with special emphasis on the closure approximations, i.e. the approximations used in any fluid approach to close the hie...
The strange physics of low frequency mirror mode turbulence in the high temperature plasma of the magnetosheath
strange physics low frequency mirror mode turbulence high temperature plasma
2009/11/11
Mirror mode turbulence is the lowest frequency perpendicular magnetic excitation in magnetized plasma proposed already about half a century ago by Rudakov and Sagdeev (1958) and Chandrasekhar et al. (...
Continuous partial trends and low-frequency oscillations of time series
Continuous partial trends low-frequency oscillations time series
2009/11/9
This paper presents a recent methodology developed for the analysis of the slow evolution of geophysical time series. The method is based on least-squares fitting of continuous line segments to the da...
Extracting low frequency climate signal from GRACE data
low frequency climate signal GRACE data
2009/10/22
For more than three years, the GRACE pair of satellites have been orbiting the Earth, monitoring the time variable mass distribution for scales ranging from regional to global. The GRACE data have bee...
Discriminating low frequency components from long range persistent fluctuations in daily atmospheric temperature variability
long range persistent fluctuations daily atmospheric temperature low frequency components
2009/7/22
This study originated from recent results reported in literature, which support the existence of long-range (power-law) persistence in atmospheric temperature fluctuations on monthly and inter-annual ...
Continental Shelf Waves：Low-Frequency Variations in Sea Level and Currents Over the Oregon Continental Shelf
Continental Shelf Waves Sea Level Low-Frequency Variations Oregon Continental Shelf
2009/4/2
Sea level variations and currents on the Oregon continental shelf exhibit wavelike characteristics in a frequency band from approximately 0.15 to 0.45 cycle per day (cpd). Shelf wave dispersion curves...
Observed Anisotropy of Spectral Characteristics of Internal Waves Induced by Low-Frequency Currents
Spectral Characteristics Internal Waves Low-Frequency Currents
2009/3/26
The isotropy of the internal wave field is investigated from short-time spectra of horizontal current measured in the deep sea. A significant anisotropy is detected at high frequencies during most per...
Some Three-Dimensional Characteristics of Low-Frequency Current Fluctuations near the Oregon Coast
Three-Dimensional Characteristics Oregon Coast Low-Frequency Current Fluctuations
2009/3/7
An analysis is presented of the low-frequency fluctuations [ω<0.6 cycle per day (cpd)] of the currents near the Oregon coast, based on the 1972 and 1973 measurements from moored current meters in CUE-...
A Study of Low-Frequency Fluctuations Near the Peru Coast
Low-Frequency Fluctuations Peru Coast
2009/2/23
An analysis is presented of low-frequency (<0.4 cpd) fluctuations in currents, temperature and tide gage data collected during the March-September 1976 segment of the CUEA JOINT-II experiment off the ...
The Relationship of Tidal and Low-Frequency Currents on the North Slope of Georges Bank
Tidal Low-Frequency Currents North Slope of Georges Bank
2009/2/18
Measured currents at the steeply sloping north edge of Georges Bank show an unusually strong correlation between tidal and lower frequency components. The dominant current constituents are the rotary ...
The Nature of the Poleward Heat Flux Due to Low-Frequency Current Fluctuations in Drake Passage
Poleward Heat Flux Drake Passage Low-Frequency Current Fluctuations
2009/2/16
Values of poleward heat flux due to low-frequency current fluctuations in Drake Passage are presented for 19 long-term current meter records obtained during 1975, 1976 and 1977. Most of the measuremen...
Low-Frequency Current Variability on the Southern Mid-Atlantic Bight
Low-Frequency Current Southern Mid-Atlantic Bight
2009/2/13
Low-frequency current variability on the continental shelf, 84 km off the mouth of the Chesapeake Bay, was examined from 4-month (mid-March to June 1975) current, sea level and meteorological records....
Observations of Interaction between the Internal Wavefield and Low-Frequency Flows in the North Atlantic
Interaction Low-Frequency Flows Internal Wavefield North Atlantic
2009/2/13
A total of four moorings from POLYMODE array I and II were analyzed in an investigation of the interaction of wavefields and mean flow. In particular, evidence for internal wave-mean flow interaction ...
Low-frequency v and u component oscillations in the eastern equatorial Atlantic are addressed using lime series of up to 1.5 years duration from the lower portion of the main thermocline. A distinct f...
Low-Frequency Variations in Currents near the Shelf Break：Northeast Gulf of Alaska
Very low-frequency Low-Frequency Variations Shelf Break
2009/2/9
We present current observations from depths of 20, 50, 100 and 175 m obtained over a 3-year period near the northeast Gulf of Alaska shelf break, and emphasize a 2-year continuous segment from 50 m de...