搜索结果: 1-15 共查到“理学 seasonal variations”相关记录38条 . 查询时间(0.09 秒)
A comparison of f0F hmE model calculations with El Arenosillo digisonde observations. Seasonal variations
Ionospheric E-layer-theoretical modeling solar EUV nitric oxide
2015/10/8
Seasonal variations of hmE and f0F2 are analyzed using El Arenosillo digisonde observations during solar minimum (1995-1996). Unlike some widely used empirical models daytime hmE show seasonal variati...
Seasonal variations in natural processesand atmospheric precipitation
natural processes seasonal variations precipitation
2015/9/14
To study the nature of seasonal variations in time series measured at the Garm test site, a local model based on the experimental data of atmospheric precipitation penetration into the soil has been p...
Investigations on diurnal and seasonal variations of Schumann resonance intensities in the auroral region
resonances ELF observations ionospheres
2015/9/2
Measurements of the magnetic component of the Schumann resonance in the frequency range 6-14 Hz were performed
at high latitude location (TNB Antarctica; geographic coordinates: 74.7°S, 164.1°E; geom...
Multi-year (2004–2008) record of nonmethane hydrocarbons and halocarbons in New England: seasonal variations and regional sources
nonmethane hydrocarbons halocarbons New England seasonal variations regional sources
2010/8/13
Multi-year time series records of C2-C6 alkanes, C2-C4 alkenes, ethyne, isoprene, C6-C8 aromatics, trichloroethene (C2HCl3), and tetrachloroethene (C2Cl4) from canister samples collected during Januar...
Seasonal variations of concentrations and optical properties of water soluble HULIS collected in urban environments
Seasonal variations water soluble HULIS urban environments
2010/8/12
Major contributors to the organic aerosol include water-soluble macromolecular compounds (e.g. HULISWS: Water Soluble Humic LIke Substances). The nature and sources of HULISWS are still largely unknow...
Seasonal variations in the concentrations of methyl and ethyl nitrate in ashallow freshwater lake
Seasonal variations in the concentrations methyl ethyl nitrate in a shallow freshwater lake
2014/4/16
Between February and October 2007, a time series of alkyl nitrate concentrations in the water column of a shallow freshwater lake, University of East Anglia Broad, located in southeastern England was ...
The paper presents a method for testing second order stationarity against
the alternative that seasonal variations take place in the autocovariance
function. This is a modification of a test suggest...
The Effect on Storm Runoff Response of Seasonal Variations in Contributing Zones in Small Watersheds
Storm Runoff Response Seasonal Variations Contributing Zones
2009/10/28
Storm runoff production by saturation overland flow has been studied in two
small watersheds in south-central Ontario. One is in rural land use and contains
a wetland. The total saturated zone is at...
Seasonal Variations of Oxygen-18 in Soil Moisture and Estimation of Recharge in Esker and Moraine Formations
Seasonal Variations Oxygen-18 Soil Moisture Moraine Formations
2009/10/28
The use of Oxygen-18 as a natural tracer of soil moisture and estimation of
recharge in different types of soils is presented and discussed. The 8 values ~f
180 in summer and winter precipitation in...
Seasonal Variations in Suspended Sediment Yield in the Baltic Sea Drainage Basin
Seasonal Variations Suspended Sediment Yield Drainage Basin
2009/10/26
The aim of this article is to describe the seasonal fluctuations of suspended
sediment yield in the Baltic Sea drainage basin and to quantify the monthly
inflow of suspended sediment to the Baltic. ...
HYDROCHEMICAL STUDIES OF THE HINDON RIVER, INDIA：SEASONAL VARIATIONS AND QUALITY-QUANTITY RELATIONSHIPS
indon river system water quality western Uttar Pradesh
2009/10/13
A hydrochemical study of the Hindon river system in western Uttar Pradesh (India) has been carried out with the objective to examine variation in water quality characteristics within the river system,...
Seasonal variations in elemental composition of aerosols in Xiamen, China
environmental change aerosol concentration seasonal variation enrichment factor deposition flux
2017/8/9
Rapid industrialization and economic take-off in coastal cities of China have placed great strain on the environment. In the this study, 40 aerosol samples were collected in the coast of Xiamen, Fujia...
Validation of urban NO2 concentrations and their diurnal and seasonal variations observed from the SCIAMACHY and OMI sensors using in situ surface measurements in Israeli cities
urban NO2 concentrations SCIAMACHY OMI sensors
2009/6/16
We compare a full-year (2006) record of surface air NO2 concentrations measured in Israeli cities to coinciding retrievals of tropospheric NO2 columns from satellite sensors (SCIAMACHY aboard ENVISAT ...
Long-term and seasonal variations in CO2: linkages to catchment alkalinity generation
CO2 alkalinity acidification
2009/3/23
As atmospheric emissions of S have declined in the Northern Hemisphere, there has been an expectation of increased pH and alkalinity in streams believed to have been acidified by excess S and N.
Seasonal variations of the water soluble organic carbon mass fraction of aerosol in two valleys of the French Alps
water soluble organic carbon mass fraction aerosol valleys of the French Alp
2009/2/18
Concentrations of Water Soluble Organic Carbon (WSOC) and WSOC fraction to Organic Carbon (OC) were measured at two urban sites in valleys of the French Alps during a period of two and a half years. C...