- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
สิ่งมีชีวิตและสิ่งแวดล้อมพวกเขาโต้ตอบ บางครั้งมีขยายคำนิยามการรวมกระบวนการของการโต้ตอบ ดูนิเวศวิทยา
Industry:Weather
The wind direction most frequently observed during a given period. The periods most frequently used are the observational day, month, season, and year. Methods for determination vary from a simple count of periodic observations to the computation of a wind rose. Compare resultant wind.
Industry:Weather
1. The viscous downslope flow of water-saturated soil and other surficial materials, particularly in regions underlaid by frozen ground (not necessarily permafrost) acting as a barrier to downward water percolation. 2. Any slow soil flowage on slopes in which the near-surface unconsolidated material is saturated by water.
Industry:Weather
A pressure anemometer consisting of two concentric tubes that are oriented parallel to the flow. The inner tube is open at the upstream end to sense the total pressure, while the outer tube is closed with a rounded contour and has a ring of small static pressure ports a short distance downstream. Each tube is connected to a manometer and the difference between the two pressures, the dynamic pressure, is proportional to the square of the fluid speed.
Industry:Weather
A combination of smoke and haze; or, a very light smoke condition that resembles haze.
Industry:Weather
The statistical function that shows how the density of possible observations in a population is distributed. It is the derivative ''f''(''x'') of the distribution function ''F''(''x'') of a random variable, if ''F''(''x'') is differentiable. Geometrically, ''f''(''x'') is the ordinate of a curve such that ''f''(''x'')''dx'' yields the probability that the random variable will assume some value within the range ''dx'' of ''x''. The density function is nonnegative, and its total integral is unity. Sometimes the probability density function is called the distribution function, but this practice causes confusion and is not recommended.
Industry:Weather
The 3 × 3 array of coefficients representing the deformation of a nonrigid body subjected to stress.
Industry:Weather
An instrument for measuring the transmissivity of the atmosphere; a type of transmissometer. It consists of a constant-intensity collimated light source located at a suitable distance from a photoelectric cell. Variation in the turbidity of the atmosphere causes changes in the intensity of the light received by the photo cell, thereby varying its electrical output.
Industry:Weather
A method or technique of developing objective forecasting aids. Suitable statistical relationships are found between a predictand and one or more observed variables that can be forecast by one or more numerical (dynamic) prediction models. The relationships can be determined by linear or nonlinear regression, multiple discriminant analysis, or other statistical methods. In practice, the relationships are applied to the appropriate output of numerical prediction model(s) to yield forecasts of the predictand. In essence, the output of the model(s) is considered perfect, hence the name. The difference between model output statistics (MOS) and perfect prognostic is that in MOS the predictand is related to the actual model output, while in perfect prog, the predictand is related to observations or representations of them at (nearly) concurrent times.
Industry:Weather
เทคนิค chromatographic คล้ายกับ chromatography ก๊าซ ยกเว้นว่าแต่ละตัวหรือสารทำละลายต่าง ๆ หรือสารทำละลาย และเปลี่ยนแปลงความเข้มข้นของตัวทำละลายที่ใช้ร่วมกับเครื่องเขียนคอลัมน์ระยะเพื่อแยกส่วนประกอบของเมทริกซ์ของเหลว เครื่องตรวจจับต่าง ๆ จะใช้ใน HPLC, UV (ความยาวคงที่ และผันแปรคลื่น), ดรรชนี และนำเครื่องตรวจจับ
Industry:Weather
