| 单词 |
orographic |
| 释义 |
orographic, a.|ɒrəʊˈgræfɪk|
[f. orography + -ic: see -graphic.]
a. Of or pertaining to orography; connected with the physical character, features, and relative position of mountains.
1846in Worcester. 1864Reader 5 Mar. 303/1 The two chains repeat each other in all their primary orographic conditions. 1880F. R. & G. R. Conder Handbk. to Bible vii. 333 Such being the orographic features of the site. 1888J. D. Whitney Names & Places 85 It needs but little orographic study to find out that a single entirely isolated mountain is something of comparatively rare occurrence.
b. Meteorol. Applied to precipitation which results from moist air being forced upwards by mountains, and to the action of mountains in producing such precipitation.
1915Q. Jrnl. R. Meteorol. Soc. XLI. 41 These considerations at once brought into prominence the distinction between orographic and cyclonic rainfall, which was perhaps one of the most puzzling features in British meteorology. 1938E. G. Bilham Climate Brit. Isles v. 101 Thunderstorm rains..do not often produce total amounts of rainfall..of the same order of magnitude as are observed when intense cyclonic rains are augmented by orographic action. 1955W. J. Saucier Princ. Meteorol. Analysis x. 324/2 To the windward of the Appalachians..orographic lifting of the moist and turbulent air is sufficient to produce precipitation without needing convergence in surface flow. 1968Jrnl. Appl. Meteorol. VII. 857/1 Orographic precipitation has long been considered to be an attractive target for cloud seeding. 1976B. Lecomber Dead Weight iii. 41 It's the same pattern on all the West Indian Islands:..on the high ground, where the orographic clouds form and double or treble the rainfall, you find the jungles. |
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