დენდროქრონოლოგია

დენდროქრონოლოგია

Observation of a core or cross-section of a tree trunk shows a pattern of essentially concentric rings, each representing a year of growth. The number of rings can therefore be used to date the tree. Further, wider rings (higher rate of growth) indicate wetter years, and vice versa. The study can therefore help in the construction of past climate.

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Kalbos dalis: noun
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Pramonės šaka / sritis: Geography
Category: Physical geography
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დეინდუსტრიალიზაცია

Geography; Physical geography

Fall in the percentage contribution of secondary industry to an economy in terms such as value of input to gdp and importance as an employment sector.

შესაბამისი ტექნოლოგია

Geography; Physical geography

See alternative technology. Appropriate technology might more commonly be the term applied to alternative technology originating externally.

დელტა

Geography; Physical geography

A depositional feature found at river mouths under certain conditions. Where the river enters the body of water (sea or lake) there is energy loss and load is deposited. If the ...

წყალმცენარეები

Geography; Physical geography

Fall into four categories. Emergents ( rooted in sediment and protrude above the surface), free-floaters, floating-leaved (rooted in sediment with leaves floating on the surface), ...

კანიონი

Geography; Physical geography

A large-scale, steep-sided valley which is deeper than it is wide.

ატმოსფერო

Geography; Physical geography

Layer of gases surrounding earth and held there by gravity. Nitrogen forms 78.09% by volume and oxygen 20.95%. The remaining 0.96% is made up of a further 19 gases. The boundary ...