| 释义 |
barotropic, a. Meteorol.|bærəˈtrɒpɪk, -ˈtrəʊpɪk|
[f. *baro- + -tropic.]
Characterized by or associated with an atmospheric condition in which surfaces of constant pressure coincide with those of constant density. Cf. *baroclinic a.
1921[see *baroclinic a.]. 1934D. Brunt Physical & Dynamical Meteorol. viii. 166 The fluid of ‘classical’ hydrodynamics, which is normally assumed to be homogeneous and incompressible, is obviously barotropic. 1949Jrnl. Meteorol. VI. 106/1 A detailed study of the character of nondivergent horizontal wave motion in a barotropic atmosphere. 1976Sci. Amer. Mar. 54/3 The atmosphere is said to be barotropic, as opposed to baroclinic, where the available energy is mainly gravitational and is associated with horizontal temperature gradients. 1986Icarus LXVIII. 325/1 Another possibility is that the observed feature is produced by some form of barotropic instability. In addition to the conventional type of shallow barotropic instability appropriate to the Earth, there is the possibility of an alternative deep form for the outer planets.
Hence baroˈtropically adv., in a barotropic manner; as regards barotropy; baˈrotropy n., the condition of being barotropic.
1921V. Bjerknes in Geofysiske Publikationer II. iv. 3 The case of barotropy appears, first when the equisubstantial surfaces coincide with the isobaric, i.e., when the specific volume, or the density, is a function of the pressure..and secondly, in the case of complete homogeneity. 1950Tellus II. 253/2 The correspondence is close and..much better than the barotropically computed change. 1951Barotropy [see baroclinity (s.v. *baroclinic a.)]. 1959S. L. Hess Introd. Theoret. Meteorol. xii. 193 Barotropy manifests itself on constant-level charts, in part, by parallelism of isobars and isotherms. 1978Nature 10 Aug. 576/2 Shukla obtained barotropically unstable upper tropospheric modes..but failed to get a preferred scale of maximum growth for lower tropospheric disturbances. |