- 업종: Education
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Founded in 1879 and named after Texas' greatest hero General Sam Houston, Sam Houston State University is public shcool within the Texas state university system and located in Huntsville, Texas.
It's a multicultural institution that offers 79 bachelorette degree programs, 54 masters and five ...
The location in the atmosphere along both sides of the equator at which the strong upward motion of air (Hadley cell) is characterized by heavy precipitation in convective thunderstorms and by relatively low surface pressure. It is also called the equatorial low pressure belt. .
Industry:Chemistry; Weather
The lowest layer of the Earth's atmosphere, ranging from the ground to the base of the stratosphere with a altitude of 10-15 kilometers depending on the latitude. This is where all weather occurs. The word troposphere is derived from the Greek words tropos--turning and spharia--sphere.
Industry:Chemistry; Weather
The major atmospheric air currents centers over the Pacific and Atlantic Oceans, North America and over the Middle East. These systems are fairly robust from period to period, and across different observational data sets. The most important jet stream from our perspective at Sam Houston State University, in Huntsville Texas, USA , is the Pacific Jet, which helps set the storm tracks over the west coast of North America--like most northern hemispheric weather--moving towards the east.
Industry:Chemistry; Weather
The marked boundaries of two air masses of differing densities. The difference in densities can be related to temperature, pressure or humidity.
Industry:Chemistry; Weather
The moisture content of air. Relative humidity is the ratio of the amount of water vapor actually present in the air to the greatest amount possible at that temperature (the saturation vapor pressure).
Industry:Chemistry; Weather
The molecular formula for ammonia is NH<sub>3</sub>. Ammonia is one of the most important inorganic nitrogen compounds in atmospheric water droplets. It reacts with strong acids and is one of the only known basic, gas phase atmospheric components. Atmospheric ammonia can also enhance the nucleation rate and the production of new particles in the atmosphere. These new particles can be activated to become condensation nuclei and then, through various processes, grow to a particle size of 0. 05 micrometer or larger which can then be effective as cloud condensation nuclei. This process can, therefore, affect the global radiation budget. The major sources of ammonia are decaying natural organic matter, livestock wastes, fertilizers, and industrial activity.
Industry:Chemistry; Weather
The movement of air in a vertical direction usually caused by differences in temperature and density.
Industry:Chemistry; Weather
The movement of gas molecules through an opening that has relatively large holes.
Industry:Chemistry; Weather
The natural movement of air from one location to another in the planet's atmosphere due to differences in air pressure. For major urban centers, gaseous pollution produced there from, for instance, internal combustion engines can be moved from where those toxic substances are released downwind to the open ocean or otherwise away from the populated area. This transportation process takes times and the anthropogenic components react with each other and sunlight over time. This results in changing pollutant concentrations over time. Since wind is a physical movement of air, this also affects the mixing and dilution of atmospheric particles. Wind affects the process by which particles in the nucleation mode collide and coagulate to form accumulation mode then coarse mode particles, and in general, higher surface winds dilute and decrease particle formation from vapor phase condensation.
Industry:Chemistry; Weather
The negative logarithm of the hydrogen ion concentration of a solution. It is the quantitative expression of the acidity and alkalinity of a solution and has a scale that generally ranges from about 0 to 14. pH 7 is neutral; <7 is acidic; and >7 is alkaline.
Industry:Chemistry; Weather
