Physical Geography
  Tectonics and Geology
  Climatic Change
  Climate at Present and in the Past
  Rivers, Lakes, Seas and Wetlands

Biomes & Regions
  Arctic Environments
  Boreal Forests
  Mixed and Deciduous Forests
  Steppe and Forest-steppe
  Arid Environments
  The Mountains of Northern Russia
  The Mountains of Southern Siberia
  The Caucasus
  The Mountains of Central Asia
  Lake Baikal
  The Far East

Environmental Problems
  Radioactive Contamination
  Oil and Gas Development
  Air Pollution
  The Aral Sea Problems
  Deforestation and Degradation of Forests
  Nature Protection and Conservation

Images of Russian Nature
  Geographic Index
  Systematic Index
  Alphabetical Index

Nature Reserves
  Northern Russia
  Central Russia
  Povolzhye (Volga river basin)
  Southern Russia
  Ural Mountains
  Western Siberia
  Eastern Siberia
  Far East

‘отографии природы –оссии
  √еографический каталог
  —истематический каталог
  јлфавитный каталог

Nature Landscapes of the World
  North America
  South America

Field Ecology Education
  Instructive Videos
  Instructive Manuals

Ёкологический ÷ентр Ёкосистема на Facebook Ёкологический ÷ентр Ёкосистема ¬ онтакте

ётуб канал Ёкосистема YouTube EcosystemaRu

—качать приложени€ Ёкосистемы Ёко√ид из магазина Google Play / Play Market
—качать приложени€ Ёкосистемы Ёко√ид из AppStore / iTunes
¬идео-360 по экологии на нашем Youtube канале

Bird Decoys for European Birds: Songs, Calls, Sounds, Bird voices - application for Android download from Google Play / Play Market for free

Share this page with your friends:

( ) : : = = + Apostille documents. Birth certificate apostille. globalapostille.us Texas apostille. +

Russian Nature

Home | Physical Geography | Biomes & Regions | Environmental Problems | Images of Russian Nature | Nature Reserves

Please put an active hyperlink to our site (www.rusnature.info) when you copy the materials from this page

Biomes and Regions of Northern Eurasia

Arid Environments

<<< Introduction | Biomes & Regions Index | Litho-edaphic Types of Central Asian Deserts >>>

Climatic Conditions

The deserts and semi-deserts of the Commonwealth of Independent States (CIS) have a typically continental climate. Summers are hot, cloudless, and dry, and winters are moist and relatively warm in the south and cold with severe frosts in the north. The arid zone is usually divided into two physiographic subzones: northern (Kazakhstan) and southern (Iran-Turanian) (Petrov, 1976).

Precipitation in the northern deserts and semi-deserts is associated mainly with the westerly flow and has a distinct maximum in spring-early summer as the influence of the Siberian high diminishes and convective activity becomes stronger. In the north of the semi-desert zone the winters are very cold with a mean minimum of -26∞C and absolute minima around -40∞C or colder in the north of the Caspian lowland and in the Kazakh Knolls. Further south, in the so-called northern deserts, the mean July temperature ranges from 22∞C to 25∞C, and the annual precipitation from 155 mm to 270 mm (Figure 12.2).

Annual distribution of temperature and precipitation in several regions of the arid zone

Fig. 12.2 Annual distribution of temperature and precipitation in several regions of the arid zone

Winter is long and relatively cold with the mean January temperature ranging between -3∞C and -9∞C. The mean summer temperature is around 26-28∞C. The annual sum of daily temperatures above 10∞C (an index frequently used in agricultural climatology and biogeography), ranges between 3000∞C and 3500∞C indicating that thermal conditions are favourable for plant growth.

In the southern Iran-Turanian deserts precipitation (annual means above 100 mm) has a spring maximum which is associated with the northward migration of the Iranian branch of the Polar front. Most frequently, rain is brought by the depressions that develop over the eastern Mediterranean, migrate north-eastwards and regenerate over the Caspian Sea. The July temperatures are about 32∞C in the southern deserts with a maximum of 52∞C in Repetek (eastern Karakum). The annual sum of daily temperatures above 10∞C reaches 4000-5000∞C.

<<< Introduction | Biomes & Regions Index | Litho-edaphic Types of Central Asian Deserts >>>



Recommend this page to your friends:

* *