Dry middle widths

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Dry middle widths:
  • Grass steppes
  • Deserts and semi-deserts

    • The dry middle latitude zone is one of the nine global eco-zones according to J. Schultz. Today it occupies about 11.1% of the earth's land surface. At the beginning of the 21st century, around 40% of these are largely in a near-natural state .

    It occupies the areas in the cool temperate climate zone , which have an arid climate . According to the prevailing vegetation, it can be further subdivided into the landscape types grass steppe , shrub steppe , dry steppe , winter- cold semi-desert and semi-desert .

    The boundaries of the dry middle widths are in reality fluid, so that an exact extent - as shown on the map - cannot in fact be determined. This fact becomes understandable if one uses comparable geozonal models , e.g. T. have significant deviations. For example, consider the comparable zonobiome VII of the cold winter dry areas on the map of the zonobiome according to Walter and Breckle or the FAO Ecozones . The dry middle latitudes characterize four differently marked seasons: a hot and dry summer, a cold winter, a short spring with a rapid rise in temperature and maximum precipitation, and a short autumn with a rapid fall in temperature.

    Individual evidence

    1. ↑ Schultz, J. (2008): The Earth's Eco Zones . Stuttgart: Ulmer. ISBN 978-3-8252-1514-9
    2. ↑ Values ​​from J. Schultz (Schultz, J. (2008): Die Ökozonen der Erde. Stuttgart) without Antarctica and Greenland converted to the entire land surface. See the article Eco zone # The individual eco zones . (See also tabular overview of various landscape zone models and their proportions ; PDF; 114 kB)
    3. ↑ Map data for the studies "Last of the wild", "Intact forest landscapes" and "Review of status and conservation of wild land in Europe", summarized in the source description for the "Wilderness World Map" on Wikimedia Commons

    literature