class 9 sst (geo) chapter 4 ncert question answers
Answers
Explanation:
climate
refers to the sum total of weather conditions and variations over a large area for a long period of time (more than 30 years).
weather
refers to the state of the atmosphere over an area at any point of time the elements of weather and climate are the same that is temperature atmospheric pressure wind humidity and precipitation.
while precipitation is mostly in the form of snowfall in the purpose parts of Himalayas it rains over the rest of the country the annual precipitation we rise over 400 cm in Meghalaya to less than 10 cm in Ladakh and western Rajasthan.
climatic controls
there are six major controls of the climate of any place they are latitude and altitude pressure and wind system distance from the sea ocean currents and relief features.
the upper air circulation of the region is dominated by a westerly flow. an important component of this flow is the jet stream.
the Indian monsoon
the differential heating and cooling of land and water
the shift of the position of intertropical convergence zone
the presence of the high pressure area east of Madagascar.
Tibetan plateau gets intensely heated.
movement of the Western Jet streams to the north of the Himalayas and the presence of the tropical easterly jet stream over the Indian peninsula.