Showing papers on "Subtropics published in 1974"
TL;DR: A review of selected literature on latitudinal climatic shifts and atmosphere-ocean interaction suggests some similarities between the patterns of climate in the 1960s and the climate of the Little Ice Age as discussed by the authors.
33 citations
Journal Article•
TL;DR: The grass genus Vulpia comprises approximately 25 species native to temperate and subtropical regions of Europe, the Mediterranean region, and North and South America, and several species have been introduced into Asia and Australia.
Abstract: The grass genus Vulpia comprises approximately 25 species native to temperate and subtropical regions of Europe, the Mediterranean region, and North and South America. Several species have been introduced into Asia and Australia. In the warmer regions these grasses grow only during the cool season or at high elevations. Of the five North American species two are introduced and the others are native.
15 citations
TL;DR: Depth-distribution of tritium in Southern Ocean waters is reported in this article, which strongly suggests a younger age for bottom waters circulating in the entire region to the south of South Australia.
Abstract: Depth-distribution of tritium in Southern Ocean waters is reported. Decrease of tritium in surface waters from c 2 TU at 38° S. to 40°S. latitude, to 1.3TU and 1.1 TU at 45°S., 55°S., 60°S. and 64°S. latitudes, are very likely to be associated with the presence of convergence and divergence areas at subtropical and subantarctic latitudes in the Southern Ocean. A tritium-free layer has been found to exist at intermediate depths. Significant increase of tritium in waters at and below 4 km. strongly suggests a younger age, a minimum of the order of 25 years for the bottom waters circulating in the entire region to the south of South Australia.
8 citations
01 Jan 1974
TL;DR: This paper showed that many of these zones can be traced from Japan to Sakhalin, Kamchatka, and North America, using phylogenetic successions of rapidly evolving taxa.
Abstract: World-wide correlations of Tertiary strata in tropical and subtropical areas are generally based on planktonic foraminiferal zones. These zones are based on phylogenetic successions of rapidly evolving taxa. Current studies show that many of these zones can be traced from Japan to Sakhalin, Kamchatka, and North America.
3 citations
01 Jan 1974
TL;DR: In this article, the authors discuss the difficulties surrounding the monoclimax theory in the tropics, while Beadle has spoken against it in an Australian context, and the catenary sequences of soils and vegetation on the West Australian plateau immediately pose questions of status and development.
Abstract: The insistence of plant geographers in giving undue importance to the influence of climate has been paralleled among ecologists ever since Clements proposed the concept of the climax, and among pedologists since the Russians developed the zonal classification of soils. There is a discussion in Beard (1945) of the difficulties surrounding the monoclimax theory in the tropics, while Beadle (1951) has spoken against it in an Australian context. The catenary sequences of soils and vegetation on the West Australian plateau immediately pose questions of status and development, as the example given for the Boorabbin area by beard (1969) well shows. Which of the five vegetation-types concerned would be considered as the climatic climax, and what is the status of the others?
3 citations
01 Jan 1974
TL;DR: This article showed that shallow-water carbonate sedimentation generally is restricted to tropical and subtropical climates and that some of the major carbonate contributors, such as hermatypic corals and calcareous green algae are limited to warmer climates.
Abstract: Rapid shallow-water carbonate sedimentation generally is restricted to tropical and subtropical climates. Some of the major carbonate contributors, such as hermatypic corals and calcareous green algae are limited to warmer climates. In addition, warmer waters are more favorable for non-skeletal precipitation. This is not to say that carbonate-rich shallow-water sediments are limited to tropical climates. Serpulid and vermetid reefs, as well as high latitude eulittoral organisms, can create carbonate-rich deposits in colder climates. Some examples will be given in the latter part of this chapter.
1 citations