(Pdf) characteristic analysis of sandstorms in taklamakan desert gas vs electric water heater


Firstly, the annual variation of sandstorm and strong sandstorm weather process in China from 2000 to 2012 is analyzed according to the “Sand-Dust Weather Yearbook” (2012). Secondly, based on the ERA-Interim Reanalysis from ECMWF and MISR data from the Terra satellite, we investigate the correlation between different dust weather process and land meteorological elements. Finally, the temporal gas efficient suv 2008 and spatial distribution features of the aerosol optical depth (AOD) in the Taklamakan Desert is studied. And we compare the Taklamakan Desert AOD with nationwide AOD. The results show that: (1) the frequency of sandstorm and strong sandstorm has shown a downward trend and the occurrence of sandstorm decreases more in recent years. (2) In the Taklamakan Desert, the number of sandstorm is positively correlated with the surface temperature, meanwhile, negatively related to the surface relative humidity. (3) In all seasons, the average of AOD in Taklamakan Desert is higher than that of the whole country, and there are obvious differences among the four seasons.

Statistical analysis of changes for the year 2000 through 2012 (a) sandstorm electricity generation in california (b) strong sandstorm (c) surface temperature (d) surface relative humidity Figure 2a shows a significant decline of the annual occurrence frequency of sandstorm in the Taklamakan Desert. Similarly, there is also a downtrend in the happening of strong sandstorm in Figure 2b. It can easily conclude that the frequency of sandstorm has a larger drop than the strong sandstorm from 2000 to 2012 in the Taklamakan Desert by comparing Figure 2a and Figure 2b. From Figure 2a and Figure 2c, we can infer a positive relationship between the appearance of sandstorm and the land electricity in salt water experiment surface temperature. As we can see, when the surface temperature is higher in the year of 2006 to 2009, the sandstorm also happens more in those years. On the contrary, there are fewer sandstorms from 2002 to 2004 when the surface temperature is lower. The reason of this positive relationship may astrid y gaston lima menu prices be that high temperature will produce updrafts, resulting in the decrease of the atmosphere stability and leads to sandstorm. In the same way, we can infer that there is a negative correlation between the occurrence of sandstorm and the surface relative humidity. From the figure 2a and Figure 2d, when the surface relative humidity is higher in the years of 2003, 2004 and 2005, sandstorms happen fewer. However, sandstorms occur more in 2007 and 2008 when the surface relative humidity is lower electricity in human body wiki. This negative correlation may be caused by the fact that the drier of the sand, the easier it will be lofted by wind, which produces the sandstorm.

Sand-dust storm is a special natural disaster that frequently occurrs in deserts and their surrounding areas. With the data published on Surface Meteorological Monthly Bulletin and Surface Chart during 1971-1996, the temporal-spatial distribution and annual variation of sand-dust storms are analyzed on the basis of the case study of atmospheric process. Furthermore, the tracks and source areas of sand-dust storms are determined assisted with GIS. The results show: Except parts of Qinghai Province, Inner Mongolia and Beijing, the sand-dust storms decrease greatly both in time and gsa 2016 new orleans space in recent decades in China. Sand-dust storms occur most frequently in spring, especially in April. According to their source areas, the sand-dust storms are classified into two types, i.e. the inner-source and outer-source sand-dust storms. Most of the outer-source sand-dust storms move along the north and west tracks. For the north-track outer-source sand-dust storms, they always intrude into China across the Sino-Mongolian boundary from Hami, a city in the eastern part of Xinjiang, to Xilin Gol, a county in Inner Mongolia, while the west-track ones intrude into China both from southern Xinjiang and northern Xinjiang. The source areas of inner-source sand-dust storms are the Taklimakan Desert and its surrounding areas in southern Xinjiang, southern part of the Junggar Basin in northern Xinjiang, Hexi Corridor in the west of Gansu Province, the dry deserts of Inner Mongolia and the Qaidam Basin in Qinghai.

The dust events in China have been studied using the data of dust storms gas jet, wind-blown sand and floating dust from 338 observation stations selected in China from 1954 to 2000. The results are as follows: (1) In China, there are two high frequent areas of dust events, one is located in the area centered around Minfeng and Hotan in the South Xinjiang Basin, the other is situated in the area centered around Minqin and Jilantai in the Hexi Region. (2) The affected areas of dust storms can be divided c gastritis into seven sub-regions, that is, North Xinjiang Region, South Xinjiang Region, Hexi Region, Qaidam Basin Region, Hetao Region, Northeastern China Region and Qinghai-Xizang Region. The area of the most frequent occurrence of dust storms and floating-dust is in South Xinjiang Region, and of wind-blown sand in the Hexi Region. The annual occurrence days of wind-blown sand in four representative regions have been increasing since 1998, but that of floating dust does not evidently reveal this phenomenon.

The effect of desert dust on cloud properties and precipitation has so far been studied solely by using electricity omd theoretical models, which predict that rainfall would be enhanced. Here we present observations showing the contrary; the effect of dust on cloud properties is to inhibit precipitation. Using satellite and aircraft observations we show that clouds forming within desert dust contain small droplets and produce little precipitation by drop hair electricity song coalescence. Measurement of the size distribution and the chemical analysis of individual Saharan dust particles collected in such a dust storm suggest a possible mechanism for the diminished rainfall. The detrimental impact of dust on rainfall is smaller than that caused by smoke from biomass burning or anthropogenic air pollution, but the large abundance of desert dust in the atmosphere renders it important. The reduction of precipitation from clouds affected by desert dust can cause drier soil, which in turn raises more dust, thus providing a possible feedback loop to further decrease precipitation. Furthermore, anthropogenic changes of land use exposing gas ninjas the topsoil can initiate such a desertification feedback process.

Anthropogenic aerosols are intricately linked to the climate system and to the hydrologic cycle. The net effect of aerosols is to cool the climate system by reflecting sunlight. Depending on their composition, aerosols can also absorb sunlight in the atmosphere, further cooling the surface but warming the atmosphere in the process. These effects of aerosols on the temperature profile, along with the role of aerosols as cloud condensation nuclei, impact the hydrologic cycle gas vs electric oven temperature, through changes in cloud cover, cloud properties and precipitation. Unravelling these feedbacks is particularly difficult because aerosols take a multitude of shapes and forms, ranging from desert dust to urban pollution, and because aerosol concentrations vary strongly over time and space. To accurately study aerosol distribution and composition therefore requires continuous observations from satellites, networks of ground-based instruments and dedicated field experiments. Increases in aerosol concentration and changes in their composition, driven by industrialization and an expanding population, may adversely affect the Earth’s climate and water supply.