- 行业: Weather
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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, ...
A smoothed composite of the recessions of several observed hydrographs, drawn to represent the characteristic time graph of decreasing total runoff for a drainage area after passage of a peak flow. Curves of this type, designed to characterize the nature of a drainage area, may be constructed as a plot of flow (stage of discharge) versus time, or as a plot of flow versus flow at some fixed later interval; also, separate recession curves may be derived for surface runoff, groundwater runoff, and even for interflow.
Industry:Weather
Μια απεικόνιση ενός τρισδιάστατου αντικειμένου που προκύπτει από την στερεοσκοπική προβολή. Μια στερεοφωνική εικόνα λαμβάνεται προβάλλοντας ταυτόχρονα ένα σύννεφο, για παράδειγμα, από δορυφόρους σε διαφορετικές τοποθεσίες από τις οποίες καθορίζεται το ύψος του νέφους.
Industry:Weather
Any particle upon which an ice crystal may grow by the process of sublimation. A. Wegener (1911) was the first to suggest that the atmosphere might contain nuclei upon which sublimation (deposition) of water vapor directly to ice occurs in a manner similar to condensation upon condensation nuclei. In experiments where various nuclei are added to supercooled clouds, it is generally difficult to determine whether these nuclei function as deposition nuclei or as freezing nuclei. It has never been demonstrated that natural deposition nuclei (as distinguished from freezing nuclei) exist in the atmosphere. In the laboratory, cases of artificial preparation of true sublimation nuclei have been reported that activate ice crystals without reaching anywhere close to water saturation; lack of such nuclei in the atmosphere results from the predominance of mixed nuclei.
Industry:Weather
A point of maximum increase in atmospheric pressure over a specified interval of time; on synoptic charts, a point of greatest positive pressure tendency; opposed to a pressure- fall center.
Industry:Weather
Used in open channel flow.) The ratio of the discharge, Q, in a channel to the square root of the energy gradient, ''S<sub>f</sub>''.
In the Manning equation it can be expressed as
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Industry:Weather
1. Referring to a normal distribution. 2. Regular or typical in the sense of lying within the limits of common occurrence, but sometimes denoting a unique value, as a measure of central tendency. Either sense presupposes a stable probability distribution. 3. As usually used in meteorology, the average value of a meteorological element over any fixed period of years that is recognized as a standard for the country and element concerned. Often erroneously interpreted by the general public as meaning the weather patterns that one should expect. In the broadest sense, “normals” should consist of a suite of descriptive statistics, including measures of central tendency (e. G. , mean, median), range (e. G. , standard deviation, interquartile range, extremes), variation, and frequency of occurrence. At the International Meteorological Conference at Warsaw in 1935, the years 1901–30 were selected as the international standard period for normals. Recommended international usage is to recalculate the normals at the end of every decade using the preceding 30 years. This practice is used to take account of the slow changes in climate and to add more recently established stations to the network with observed normals. Normals should be based on actual observations if available; otherwise a recognized method should be used to “reduce” shorter series to the normal period by comparison with neighboring stations. Recognized methods of adjusting for inhomogeneities should be used to account for breaks or gradual changes introduced into the data record by changes in the hours of observation, in the observational practices, in the site or instruments used, or by a gradual change in the character of the surrounding country, such as the growth of a city. The years covered by a normal should always be clearly stated, since averages for different periods of the same length are rarely the same. See climatological standard normals.
Industry:Weather
Ένα βαρόμετρο για τέτοια ακρίβεια ότι μπορεί να χρησιμοποιηθεί για τον προσδιορισμό των προτύπων πίεση. Ένα μέσο όπως ενός βαρόμετρου υδραργύρου ευρείας οπής χρησιμοποιείται συνήθως ως μια κανονική βαρόμετρο.
Industry:Weather
Ένας όρος που χρησιμοποιείται για να περιγράψει την επιφάνεια ψύξης που ενδέχεται να προκύψουν από την εκπομπή εκτεταμένη σύννεφα καπνού (από την καύση πόλεις, τοποθεσίες καύσιμα και δάση) μετά την έκρηξη εκατοντάδων κεφαλές σε μια πυρηνική ανταλλαγή.
Industry:Weather
1. Στο U. S. καιρό παρατηρώντας πρακτική, ο προσδιορισμός για τον ουρανό κάλυψη όταν ο ουρανός είναι εντελώς κρυμμένο από την επιφάνεια-με βάση την φαινόμενα σκίασης. Είναι κωδικοποιημένα "X" στο Αεροπορίας καιρός παρατηρήσεις· αποτελεί πάντα ένα ανώτατο όριο, το ύψος των οποίων είναι η τιμή από την κατακόρυφη προβολή σε φαινομένου σκίασης. Συγκρίνετε μερικής σκίασης. 2. Με βάση την επιφάνεια σκίασης φαινόμενο.
Industry:Weather
1. Η εσωτερική σώμα αλμυρού νερού καταλαμβάνει το καταθλίψεις της επιφάνειας της γης. 2. Ένα από τα μεγάλα κύρια τμήματα των ανωτέρω, που οριοθετείται από τις ηπείρους, ο Ισημερινός και άλλες φανταστικές γραμμές. Δείτε την θάλασσα.
Industry:Weather
