Barrens, the (noun): a vast tracts of rolling grasslands, lying east of the Thentis Mountains. They are not as barren as the name suggests, but perhaps the nomenclature is intended to discourage their penetration. Not as arable as the rest of Gor because of the presence of the Thentis mountains and the absence of large bodies of water. They have extreme seasonal temperatures; bitterly cold winters and long, hot, dry summers. Their climate can also include booming thunderstorms and tornadoes and blizzards in which snow can drift as high as the mast of a light galley. The grasses, shorter at it's western edge, can reach a height of several feet as one moves further east.
The Barrens are the location Home of the nomadic tribes of the Red Savages. No white man has ever penetrated to the eastern edge of the Barrens.
The Barrens climate is significantly influenced by the Thentis Mountains and the absence of large bodies of water. Prevailing winds in the northern hemisphere of Gor are from the north and West. Accordingly a significant percentage of moisture-laden air borne by westerly winds is forced by the Thentis Mountains to cooler, less-heated air strata, where it precipitates, substantially on the eastern slopes of the mountains and the fringes of the Barrens.
Similarly the absence of large bodies of water in the Barrens reduces rainfall which might be connected with large-scale evaporation and subsequent precipitation of this moisture over land areas, the moisture being carried inland on what are, in effect, sea breezes, flowing into low pressure areas caused by the warmer land surfaces, a given amount of radiant energy raising the temperature of soil or rock significantly more than it would raise the temperature of an equivalent extent of water.
The absence of large bodies of water adjacent to or within the Barrens also has another significant effect on their climate. It precludes the Barrens from experiencing the moderating effects of such bodies of water on atmospheric temperatures. Areas in the vicinity of large bodies of water, because of the differential heating ratios of land and water usually have warmer winters and cooler summers than areas, which are not so situated. The Barrens, accordingly, tend to be afflicted with great extremes of temperature, often experiencing bitterly cold winters and long, hot, dry summers.
Book 17, Savages of Gor of Gor: Page 64