As weather conditions keep stable, the hourly variation of PM10 and PM2.5 concentrations presents regularly, the temporal variation mostly depends on the variety of contaminations released to the environment.
Based on the contrast observations on the nitrous oxide (N_ 2 O) emissions from the adjacent unfertilized vegetable field and winter wheat field of the rice-wheat rotation system in the Taihu region from 8 November 2003 to 5 June 2004, its temporal variation and the effects of soil moisture, soil temperature, available N contents and agriculture management practices were investigated and discussed.
By measuring the characteristics of model LA361K 51 S solar batteries,the temporal variation of the electric current,voltage,sunl ight intensity and the effect of weather change on the battery efficiency and tr ansforming efficiency were determined.
Using MODIS surface albedo(MOD43B3),vegetation indices(MOD13A2),land cover(MOD12Q1) and land cover products during the year 2000~2005,the spatial and temporal distribution of surface albedo over Beijing region are investigated. Temporal variation surface albedo during 2000~2005 is calculated,and the relationship between the NDVI and surface albedo is checked.
This is a study on the variation and trend of soil moisture and the climate, and the autocorrelation nature of soil moisture based on the data of climate of Baiyinxile region and the data of observation on the several typical soils of the semi-arid region for over 20 years. Based on this, this study has analyzed the temporal nature, the temporal feature of spatial variation and the spatial feature of temporal variation of moisture in these soils.
Temporal variation in oxygen consumption can be found in experimental skinks but can not be found in control ones, which suggests that feeding exerts an effect on metabolic rate (and thus, SDA) in S.indicus.
The analysed results shown that the high precision of 10-9 have been achieved in GPS measurements,the rate of crustal horizontal deformation in North China is about 4～5mm/a. The crustal horizontal motion is a direct reflection of regional stress field. By monitoring the temporal variation in crustal horizontal motion,we can study the change in stress field,analyse the tendency in seismicity and search for the seismogenic zone.
Methods Model of multiple seasonal, model of addition seasonal and ARIMA model were used to simulate the temporal variation dynamics of Rattus rattoides population and the corresponding model were established for the middle-term and long-term prediction.
In this paper, the high-resolution QuikSCAT (QuikBird Satellite Microwave Scatterometer Sea Winds Data) Sea Winds data, NCEP (National Centers for Environmental Prediction) 10m-height Gaussian grid data and pressure level reanalysis data are used to analyze the characteristics of storm track in upper- and lower- troposphere over the North Pacific as well as its temporal variation.
There are two main features about the spatial and temporal distribution variation as follows:(1) on the one hand,as far as temporal variation is concerned,the variation of dryness and wetness in China has significant period which is about (24.75) years,and it has been become more and more drought gradually since 1800;
To reveal the temporal variation characteristics of drought/flood in Tianjin city and its surrounding region(±3°),the drought or flood data of 5 stations there from 1470 to 2000 were analyzed by using statistical analysis methods,such as correlation analysis,accumulative anomaly,moving t-test,wavelet method and so on.