单词 | sub-boreal |
释义 | sub-borealadj.n. Ecology and Climatology. A. adj. 1. Designating a temperate northern or upland region with a less cold climate than a boreal region; relating to or characteristic of such a region. ΚΠ 1844 Rep. 13th Meeting Brit. Assoc. Advancem. Sci. 1843 175 Although we find fewer northern species in the fauna of the lower zones, the number of forms representative of northern species is so great as to give them a much more boreal or sub-boreal character than is present in those regions where identical forms are more abundant. 1884 Science 26 Dec. 566/1 In a country so vast that it represents sub-boreal and sub-tropical temperatures at one and the same time, it were eminently improper to speak of the appearance of an insect without specifying the latitude. 1902 Jrnl. Geol. (Chicago) 10 123 The occurrence in large numbers..of..other boreal and subboreal forms leads to the conclusion that these Pliocene strata were deposited in water much colder than that which is now found in the vicinity of San Pedro. 1973 Vegetatio 26 241 The sub-boreal spruce biogeoclimatic zone forms the southernmost zone of the Canadian Boreal Forest Region, as recognized by Krajina (1965). 2005 C. Tudge Secret Life Trees v. 97 In general, conifers are light-lovers—an odd thought, as you..contemplate the long dark winter months of spruce and pine in the sub-boreal forests of the Baltic, or the truly boreal forests of Alaska and Canada. 2. spec. Usually with capital initial or initials. Designating a warm and relatively dry climatic stage in northern Europe, following the Atlantic and preceding the sub-Atlantic (about 5,700 to 2,600 years ago); relating to or characteristic of this period. ΘΚΠ the world > the earth > structure of the earth > age or period > [adjective] > quaternary > glacial or boreal preglacial1855 boreal1876 sub-Atlantic1876 sub-boreal1876 Preboreal1924 Atlantic1935 the world > the earth > weather and the atmosphere > weather > [adjective] > of or relating to climate > in the geological past > specific genial1838 pluvial1868 boreal1876 sub-Atlantic1876 sub-boreal1876 interpluvial1907 intrapluvial1934 Atlantic1935 hypsithermal1957 1876 A. Blytt Immigr. Norwegian Flora 67 We must presume that the arctic flora was here before all the others; that the subarctic came next; that the subboreal and the subatlantic..came later than the boreal and the atlantic. 1963 H. N. Savory in I. L. Foster & L. Alcock Culture & Environment iii. 27 Primitive man, at least under sub-Boreal climatic conditions, had a choice of two main routes which gave him relatively easy access to the Glamorgan uplands. 1975 J. G. Evans Environment Early Man Brit. Isles iv. 84 The sequence is overlain by peat of Atlantic and Sub-boreal age. 1988 S. W. Green in J. L. Bintliff et al. Conceptual Issues Environm. Archaeol. 265 Agricultural intensification does not occur until the end of the Subboreal or beginning of the Subatlantic periods. 2005 E. Koster & T. Favier in E. A. Koster Physical Geogr. Western Europe ix. 177/2 Aaby (1986) concluded that the alterations of the Subboreal and Subatlantic pollen assemblages are induced mainly by man. B. n. With the: the sub-Boreal climatic period. ΘΚΠ the world > the earth > structure of the earth > age or period > [noun] > ice-age or glaciation > late or post-glacial postglacial1928 sub-boreal1929 late glacial1947 1929 Bot. Gaz. 87 562 Similar methods..show this last interglacial epoch to have been similar to the postglacial, in having periods corresponding to the preboreal, boreal, atlantic, and sub-boreal with similar vegetation. 1935 Discovery July 198/2 The Atlantic period was followed by another drier, continental phase, the Subboreal, lasting from 2500 till 500 b.c. 1969 New Phytologist 68 464 It is clear that at least some of these [pine] forests persisted into the Sub-boreal, but that their extent was considerably reduced by the spread of mixed-oak forest. 2006 Jrnl. Coastal Res. 22 436/1 It can be postulated that the sea surface temperature was slightly higher than today during at least the first part of the Subboreal. This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022). < adj.n.1844 |
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