搜索结果: 1-15 共查到“理学 latitude”相关记录93条 . 查询时间(0.081 秒)
Climate and Nutrient-Driven Regime Shifts of Cyanobacterial Communities in Low-Latitude Plateau Lakes
Climat Lakes Plateau cyanobacteria
2021/7/23
Cyanobacterial blooms that form in response to climate warming and nutrient enrichment in freshwater lakes have become a global environmental challenge.
Low-latitude ionospheric disturbances associated with earthquakes
Ionosphre equatorial anomaly low latitudes earthquakes
2015/9/28
Topside electron density measured on satellite board was analyzed. It was shown that before the two considered earthquakes with their epicenters located at low and equatorial latitudes the stable modi...
Low-frequency (0.7-7.4 mHz) geomagnetic field fluctuations at high latitude:frequency dependence of the polarization pattern
Geomagnetic pulsation MHD waves and instabilities wave polarizations Antartica
2015/9/28
A statistical analysis of the polarization pattern of low-frequency geomagnetic field fluctuations (0.7-7.4 mHz) covering the entire 24-h interval was performed at the Antarctic station Terra Nova Bay...
Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude
Geomagnetic pulsation MHD waves and instabilities
2015/9/28
In this paper we present a statistical study of the local time behaviour of low frequency (0.7-4.0 mHz) geomagnetic field fluctuation power at a low latitude station (corrected geomagnetic latitude 36...
Magnetic and solar effects on ionospheric absorption at high latitude
ionospheric absorption solar protons emissions
2015/9/25
Some periods of intense solar events and of strong magnetic storms have been selected and their effects on the ionospheric D region have been investigated on the basis of ionospheric absorption data d...
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations
Beacon satellites ionospheric plasma
2015/9/25
In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ion...
Variation of the feedback coefficient with R12 and the geographic latitude in 1-h ahead forecast of f0 F2
forecast feedback critical frequency
2015/9/25
The «prediction» and «forecast» of the critical frequency of the F 2 layer (f0 F2 ) is an important issue for frequency planning in short wave radio communications. In this context...
Analysis of the mid-latitude weather regimes in the 200-year control integration of the SINTEX model
Coupled General Circulation Model systematic error non-linear dynamics flow regimes
2015/9/17
Recent results indicate that climate predictions require models which can simulate accurately natural circulation regimes and their associated variability. The main purpose of this study is to investi...
Persistence of planetary wave type oscillations in the mid-latitude ionosphere
ionosphere atmosphere interaction mid-latitude ionosphere ionospheric disturbances atmospheric waves
2015/9/8
Planetary wave type oscillations have been observed in the lower and middle atmosphere but also in the ionosphere,
including the ionospheric F2 layer. Here we deal with the oscillations in foF2 analy...
Low frequency geomagnetic field fluctuations at cap and low latitude during October 29-31,2003
magnetospheric ULF waves sun-earth interaction polar cap
2015/9/2
On October-November 2003 complex interplanetary structures, originated by a series of solar eruptions, hit the Earth, triggering violent Sun-Earth connection events. In this paper we analyze the low f...
Size-dependent species richness:trends within plant communities and across latitude
Community ecology plant size species packing species richness
2015/8/27
We examine how species richness and species-specific plant density (number of species and number of individuals per species, respectively) vary within community size frequency distributions and across...
Improving the dynamics of Northern Hemisphere high-latitude vegetation in the ORCHIDEE ecosystem model
Northern Hemisphere high-latitude vegetation ORCHIDEE ecosystem model
2015/8/6
Processes that describe the distribution of vegetation and ecosystem succession after disturbance are an important component of dynamic global vegetation models (DGVMs). The vegetation dynamics module...
Simulating high-latitude permafrost regions by the JSBACH terrestrial ecosystem model
High latitudes phenomenon freeze thaw coupling thermal stratified soil hydrological processes insulation moss cover basin northern system capture the dynamic
2014/12/18
The current version of JSBACH incorporates phenomena specific to high latitudes: freeze/thaw processes, coupling thermal and hydrological processes in a layered soil scheme, defining a multilayer snow...
Mass-conserving tracer transport modelling on a reduced latitude-longitude grid with NIES-TM
Mass-conserving tracer transport modelling a reduced latitude-longitude grid NIES-TM
2014/12/9
The need to perform long-term simulations with reasonable accuracy has led to the development of mass-conservative and efficient numerical methods for solving the transport equation in forward and inv...
Photosynthetic protein stoichiometry and photophysiology in the high latitude North Atlantic
protein stoichiometry photophysiology
2014/11/28
Iron availability influences phytoplankton physiology and growth over more than one-third of the surface
oceans, with recent evidence even indicating iron stress during and following the latter stage...