Introduction | Remote sensing of glaciers | Glacier inventories | The Randolph Glacier Inventory | Glacier contributions to sea level rise | Summary | References | Comments | How many glaciers are there in the World? How much will they raise sea levels on full melting? Glaciers and ice caps (excluding the large Antarctic and Greenland ice sheets) respond quickly to climate change, and are likely to dominate eustatic (freshwater input from melting ice) contributions to sea level rise over the next few decades.Despite their comparatively small area, glaciers contribute significantly to global sea level risemeasurements of ice extent are time consuming, expensive, and cannot possibly be applied to all the glaciers in the world.Soil geography arose at the end of the 19th century and developed in response to the demands of agricultural production and the necessity for classifying and evaluating soils. Keller introduced a significantly new concept into soil geography. Zakharov described the microrelief complex in the podzolic zone and broadened the concept. Foreign soil scientists made an important contribution to the geography and mapping of soils, including C. The principles of soil geography in Russia were established by V. Dokuchaev, who discovered the relationship between soil and the natural factors that help to form it. With specific reference to semideserts, they showed in 1907 that soils are varied and related to the microrelief (“microcomplexity of soils”). In 1908 large-scale surveys were undertaken under the direction of K. Glinka to study the soils and vegetation in the southern regions of Western and Eastern Siberia, the basin of the upper Amur River, and Middle Asia. He developed the method of profile study of soils combined with soil formation factors. The reports and publications of these expeditions furnished a great deal of new information on the soil geography of Asian Russia. Instead of the old statistical method of mapping, he used a new technique based on establishing the relationship between soil and visible soil formation factors (relief and vegetation) and employed the relationship to determine the boundaries of the soil contours. They showed the complex nature of the soil, the wedging out and discontinuous character of several soil zones (for example, chernozem and gray forest soil), and the isolation of the piedmont zone of sierozems.
The complex of factors influencing soil formation in plains and mountains determines the zonal position of the soils. Soil-geographic regionalization for the entire USSR and the individual krais and republics was carried out by the V. Dokuchaev Soil Institute, the Council for the Study of Productive Forces, and Moscow State University.
Soil geography relies principally on the comparative geographic method to study the distribution of soils in relation to the factors influencing soil formation.
Extensive use is made of cartography in the compilation of soil maps.
In addition to work on soil cartography, theories concerning the main soil-geographic patterns and soil units were refined.
Gerasimov), different types of structures of high-altitude soil zonality (S.
Landscape geochemical phenomena were shown to be significant factors in the formation of soils in large regions and in combinations of soils from elements of the meso- and microrelief (V.