单词 | gelisol |
释义 | gelisoln. Soil Science. 1. Soil, or a soil, which is affected by regular or permanent freezing. Cf. pergelisol n. rare. ΚΠ 1949 Jrnl. Geol. (Chicago) 57 621/1 Troll..states that active annual gelisol is present in the Scandinavian mountains, active diurnal gelisol in many mountains of low and middle latitudes. 1974 Meteorol. & Geoastrophysical Abstr. 25 i. 160 There are indices for the fact that the sandy-silty cover was superimposed by a younger gelisol. 2. Usually with capital initial. A soil of an order comprising soils which rest on or contain permafrost. ΚΠ 1994 J. G. Bockheim et al. in J. M. Kimble & R. J. Ahrens Proc. Meeting Classif., Correlation, & Managem. Permafrost-affected Soils (U.S. Dept. Agric.) 33/1 A new order, the Gelisols, should be established to recognize the unique morphologies of soils and soil-forming processes at the high latitudes and altitudes. 1998 Geoderma 81 283 Gelisols have one or more of the following: (1) permafrost within 100 cm of the soil surface; or (2) gelic materials within 100 cm of the soil surface and permafrost within 200 cm of the soil surface. 2006 C.-L. Ping et al. in F. S. Chapin et al. Alaska's Changing Boreal Forest iii. 32 Soils on north-facing slopes and bottomlands have permafrost tables within 1 m and are thus classified in the Gelisol order (permafrost-affected soils). This is a new entry (OED Third Edition, March 2013; most recently modified version published online March 2022). < n.1949 |
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