(i) Cold weather season takes place from December-to February. (ii) The temperature decreases from south to north. (iii) The average temperature of the Northern Plains ranges between 10" to 50.C; whereas the average temperature of Chennai is between 24"c to 25"c. (iv) Days are warm and nights are coRead more
(i) Cold weather season takes place from December-to February.
(ii) The temperature decreases from south to north.
(iii) The average temperature of the Northern Plains ranges between 10″ to 50.C;
whereas the average temperature of Chennai is between 24″c to 25″c.
(iv) Days are warm and nights are cold.
(v) During this season, northeast trade winds prevail over the country; they blow from the land to the sea and are dry.
(i) withdrawal or the retreat of monsoon is a more gradual process. (ii) The withdrawal of the monsoon begins in the north western states of India, by early September. (iii) By mid-October, it withdraws completely from the northern half of the peninsula. (iv) The withdrawal from the southern half ofRead more
(i) withdrawal or the retreat of monsoon is a more gradual process.
(ii) The withdrawal of the monsoon begins in the north western states of India, by early September.
(iii) By mid-October, it withdraws completely from the northern half of the peninsula.
(iv) The withdrawal from the southern half of the peninsula is fairly rapid.
(v) By early December, the monsoon withdraws from the rest of the country.
' (i) Normally, when the tropical eastern south pacific ocean experiences high pressure, the tropical eastern Indian ocean experiences low pressure. (ii) But in certain years, there is a reversal in the pressure conditions and the eastern pacific has low pressure in comparison to the Indian ocean. (Read more
‘ (i) Normally, when the tropical eastern south pacific ocean experiences high
pressure, the tropical eastern Indian ocean experiences low pressure.
(ii) But in certain years, there is a reversal in the pressure conditions and the eastern pacific has low pressure in comparison to the Indian ocean.
(iii) This periodic change in pressure conditions is known as southern
Oscillation or SO.
(iv) The difference in pressure over Tahiti, in the pacific ocean and Darwin in northern Australia is computed to predict the intensity of the monsoon.
(v) A feature connected with the So is the El Nino, a warm ocean current
that flows past the peruvian coast, in place of the cold peruvian current every 2 to 5 years.
(vi) The change in pressure conditions are connected to the El Nino. Hence,
the phenomena is referred to as ENSO (EI Nino Southern oscillations).
(i) The differential heating and cooling of land and water creates low pressure on the landmass of India, while the seas around experience comparatively high Pressure. (ii) The shift in the position of Inter Tropical Convergence Zone (ITCZ) in summer over the Ganga plain is a trough of low pressureRead more
(i) The differential heating and cooling of land and water creates low
pressure on the landmass of India, while the seas around experience
comparatively high Pressure.
(ii) The shift in the position of Inter Tropical Convergence Zone (ITCZ)
in summer over the Ganga plain is a trough of low pressure in the
equatorial latitude. This is where the northeast and the southeast trade
winds converge.
(iii) The presence of the high pressure, area, east of Madagascar also affects
the Indian monsoons.
(iv) The Tibetan plateau gets intensely heated during summer, which results
in the formation of low pressure area over the plateau.
(v) The movement of the westerly jet streams to the north of the Himalayas
and the presence of tropical easterly jet streams over the Indian Peninsula
during summers, also affects the mechanism of monsoon.
Jet streams are fast flowing winds moving in the upper air of the atmosphere. (i) Sub-tropical Westerly Jet Streams: These jet streams are located approximately over 27'-30' north latitude; therefore, they are known as sub-tropical westerly jet streams. over India, these jet streams blow south of thRead more
Jet streams are fast flowing winds moving in the upper air of the atmosphere.
(i) Sub-tropical Westerly Jet Streams: These jet streams are located
approximately over 27′-30′ north latitude; therefore, they are known
as sub-tropical westerly jet streams. over India, these jet streams blow
south of the Himalayas all through the year except in summer. During
winters, the cyclonic disturbances are brought into India by these jet
streams.
(ii) Tropical-easterly Jet Streams: These easterly jet streams blow over
peninsular India, approximately over l4’N, during the summer months.
it is believed to be responsible for the sudden outbreak of the south-west
monsoon in India.
(i) During winter, a high pressure area develops north of the Himalayas. (ii) Cold dry winds blow from this region to the iow pressure areas over the oceans to the south. (iii) In summer, a low pressure area develops over interior Asia as well as over northwestern India. (iv) This causes a completeRead more
(i) During winter, a high pressure area develops north of the Himalayas.
(ii) Cold dry winds blow from this region to the iow pressure areas over the
oceans to the south.
(iii) In summer, a low pressure area develops over interior Asia as well as
over northwestern India.
(iv) This causes a complete reversal of the direction of winds during
summer.
(v) Air moves from the high pressure area over the southern Indian ocean
in a south-westerly direction, crosses the equator and turns right towards
the low Pressure area over the Indian sub-continent.
(vi) These winds are known as south-west monsoon winds.
(vii) These winds blow over the warm oceans, gather moisture and bling
widespread rainfall over the mainland of India.
(i) Latitude: Due to the round shape of the Earth, the amount of solar energy received varies according to latitude. As a result, air temperature decreases from the equator towards the poles. (ii) Altitude: As one moves up to the higher altitudes, the atmosphere becomes less dense and temperature deRead more
(i) Latitude: Due to the round shape of the Earth, the amount of solar energy received varies according to latitude. As a result, air temperature decreases from the equator towards the poles.
(ii) Altitude: As one moves up to the higher altitudes, the atmosphere becomes less dense and temperature decreases. Therefore, hills are the cooler during summers.
(iii) Pressure and winds: Pressure and winds system of an area depend on the latitude and altitude of the place. Thus, it influences the temperature and rainfall pattern.
(iv) Distance from the sea: If the region is close to the sea, it makes the temperature moderate but if it is away from the sea, it experiences extreme weather conditions.
(v) Ocean currents: Ocean currents along with the onshore winds affect the climate of a coastal area. Any coastal area with warm or cold currents flowing past it, will become warm or cold if the winds are onshore.
(vi) Relief: High mountains act as barriers for cold and hot winds. They may also cause precipitation if they lie in the path of rain-bearing winds. The leeward side of mountains remains dry, whereas the windward side is able to receive rain.
(i) There are variations not only in the form and types of precipitation but also in its amount and the seasonal distribution. (ii) Precipitation is mostly in the form of snowfall in the upper parts of the Himalayas but it rains over the rest of the country. (iii) The annual precipitation varies froRead more
(i) There are variations not only in the form and types of precipitation but also in its amount and the seasonal distribution.
(ii) Precipitation is mostly in the form of snowfall in the upper parts of the Himalayas but it rains over the rest of the country.
(iii) The annual precipitation varies from 400 cm in Meghalaya to less than 10 cm in Ladakh and western Rajasthan.
(iv) Most parts of the country receive rainfall from June to September but some parts like the Tamil Nadu coast gets most of its rains during October and November.
(i) In summer the maximum temperature goes up to 50'C in some part of Rajasthan. (ii) Whereas it may be around 20'C in Pehalgam in Jammu and Kashmir. (iii) The night temperature at Drass in Jammu and Kashmir may be as low as minus 45'C. (iv) Thiruvananthapuram, on the other hand may have a temperatuRead more
(i) In summer the maximum temperature goes up to 50’C in some part of Rajasthan.
(ii) Whereas it may be around 20’C in Pehalgam in Jammu and Kashmir.
(iii) The night temperature at Drass in Jammu and Kashmir may be as low as minus 45’C.
(iv) Thiruvananthapuram, on the other hand may have a temperature of 20’C in the Thar Desert, the day temperature may rise to 50’C and drop to 15’C the same night.
(vi) On the other hand there is hardly any difference in the day and night temperatures in Andaman and Nicobar islands or in Kerala.
Leh is also called a cold desert. (i) Leh has moderate precipitation almost throughout the year because of its topographical location. (ii) It lies on the landlocked high Ladakh plateau, beyond the Himalayas. (iii) The local precipitation is very less, but it is well distributed in the form of rainsRead more
Leh is also called a cold desert.
(i) Leh has moderate precipitation almost throughout the year because of
its topographical location.
(ii) It lies on the landlocked high Ladakh plateau, beyond the Himalayas.
(iii) The local precipitation is very less, but it is well distributed in the form
of rains in summers and snowfall in winters’
State the chief characteristics of the cold weather season in India.
(i) Cold weather season takes place from December-to February. (ii) The temperature decreases from south to north. (iii) The average temperature of the Northern Plains ranges between 10" to 50.C; whereas the average temperature of Chennai is between 24"c to 25"c. (iv) Days are warm and nights are coRead more
(i) Cold weather season takes place from December-to February.
See less(ii) The temperature decreases from south to north.
(iii) The average temperature of the Northern Plains ranges between 10″ to 50.C;
whereas the average temperature of Chennai is between 24″c to 25″c.
(iv) Days are warm and nights are cold.
(v) During this season, northeast trade winds prevail over the country; they blow from the land to the sea and are dry.
How does the process of withdrawal of monsoon take place in India?
(i) withdrawal or the retreat of monsoon is a more gradual process. (ii) The withdrawal of the monsoon begins in the north western states of India, by early September. (iii) By mid-October, it withdraws completely from the northern half of the peninsula. (iv) The withdrawal from the southern half ofRead more
(i) withdrawal or the retreat of monsoon is a more gradual process.
See less(ii) The withdrawal of the monsoon begins in the north western states of India, by early September.
(iii) By mid-October, it withdraws completely from the northern half of the peninsula.
(iv) The withdrawal from the southern half of the peninsula is fairly rapid.
(v) By early December, the monsoon withdraws from the rest of the country.
What do you understand by the phenomenon of ENSO?
' (i) Normally, when the tropical eastern south pacific ocean experiences high pressure, the tropical eastern Indian ocean experiences low pressure. (ii) But in certain years, there is a reversal in the pressure conditions and the eastern pacific has low pressure in comparison to the Indian ocean. (Read more
‘ (i) Normally, when the tropical eastern south pacific ocean experiences high
See lesspressure, the tropical eastern Indian ocean experiences low pressure.
(ii) But in certain years, there is a reversal in the pressure conditions and the eastern pacific has low pressure in comparison to the Indian ocean.
(iii) This periodic change in pressure conditions is known as southern
Oscillation or SO.
(iv) The difference in pressure over Tahiti, in the pacific ocean and Darwin in northern Australia is computed to predict the intensity of the monsoon.
(v) A feature connected with the So is the El Nino, a warm ocean current
that flows past the peruvian coast, in place of the cold peruvian current every 2 to 5 years.
(vi) The change in pressure conditions are connected to the El Nino. Hence,
the phenomena is referred to as ENSO (EI Nino Southern oscillations).
State the factors which help us understand the mechanism of monsoon.
(i) The differential heating and cooling of land and water creates low pressure on the landmass of India, while the seas around experience comparatively high Pressure. (ii) The shift in the position of Inter Tropical Convergence Zone (ITCZ) in summer over the Ganga plain is a trough of low pressureRead more
(i) The differential heating and cooling of land and water creates low
See lesspressure on the landmass of India, while the seas around experience
comparatively high Pressure.
(ii) The shift in the position of Inter Tropical Convergence Zone (ITCZ)
in summer over the Ganga plain is a trough of low pressure in the
equatorial latitude. This is where the northeast and the southeast trade
winds converge.
(iii) The presence of the high pressure, area, east of Madagascar also affects
the Indian monsoons.
(iv) The Tibetan plateau gets intensely heated during summer, which results
in the formation of low pressure area over the plateau.
(v) The movement of the westerly jet streams to the north of the Himalayas
and the presence of tropical easterly jet streams over the Indian Peninsula
during summers, also affects the mechanism of monsoon.
What are jet streams? How do they affect the climate?
Jet streams are fast flowing winds moving in the upper air of the atmosphere. (i) Sub-tropical Westerly Jet Streams: These jet streams are located approximately over 27'-30' north latitude; therefore, they are known as sub-tropical westerly jet streams. over India, these jet streams blow south of thRead more
Jet streams are fast flowing winds moving in the upper air of the atmosphere.
See less(i) Sub-tropical Westerly Jet Streams: These jet streams are located
approximately over 27′-30′ north latitude; therefore, they are known
as sub-tropical westerly jet streams. over India, these jet streams blow
south of the Himalayas all through the year except in summer. During
winters, the cyclonic disturbances are brought into India by these jet
streams.
(ii) Tropical-easterly Jet Streams: These easterly jet streams blow over
peninsular India, approximately over l4’N, during the summer months.
it is believed to be responsible for the sudden outbreak of the south-west
monsoon in India.
state how the pressure and wind conditions over India are unique.
(i) During winter, a high pressure area develops north of the Himalayas. (ii) Cold dry winds blow from this region to the iow pressure areas over the oceans to the south. (iii) In summer, a low pressure area develops over interior Asia as well as over northwestern India. (iv) This causes a completeRead more
(i) During winter, a high pressure area develops north of the Himalayas.
See less(ii) Cold dry winds blow from this region to the iow pressure areas over the
oceans to the south.
(iii) In summer, a low pressure area develops over interior Asia as well as
over northwestern India.
(iv) This causes a complete reversal of the direction of winds during
summer.
(v) Air moves from the high pressure area over the southern Indian ocean
in a south-westerly direction, crosses the equator and turns right towards
the low Pressure area over the Indian sub-continent.
(vi) These winds are known as south-west monsoon winds.
(vii) These winds blow over the warm oceans, gather moisture and bling
widespread rainfall over the mainland of India.
What are the six major controls of the crimate of world?
(i) Latitude: Due to the round shape of the Earth, the amount of solar energy received varies according to latitude. As a result, air temperature decreases from the equator towards the poles. (ii) Altitude: As one moves up to the higher altitudes, the atmosphere becomes less dense and temperature deRead more
(i) Latitude: Due to the round shape of the Earth, the amount of solar energy received varies according to latitude. As a result, air temperature decreases from the equator towards the poles.
See less(ii) Altitude: As one moves up to the higher altitudes, the atmosphere becomes less dense and temperature decreases. Therefore, hills are the cooler during summers.
(iii) Pressure and winds: Pressure and winds system of an area depend on the latitude and altitude of the place. Thus, it influences the temperature and rainfall pattern.
(iv) Distance from the sea: If the region is close to the sea, it makes the temperature moderate but if it is away from the sea, it experiences extreme weather conditions.
(v) Ocean currents: Ocean currents along with the onshore winds affect the climate of a coastal area. Any coastal area with warm or cold currents flowing past it, will become warm or cold if the winds are onshore.
(vi) Relief: High mountains act as barriers for cold and hot winds. They may also cause precipitation if they lie in the path of rain-bearing winds. The leeward side of mountains remains dry, whereas the windward side is able to receive rain.
What are the variations in precipitation in India?
(i) There are variations not only in the form and types of precipitation but also in its amount and the seasonal distribution. (ii) Precipitation is mostly in the form of snowfall in the upper parts of the Himalayas but it rains over the rest of the country. (iii) The annual precipitation varies froRead more
(i) There are variations not only in the form and types of precipitation but also in its amount and the seasonal distribution.
See less(ii) Precipitation is mostly in the form of snowfall in the upper parts of the Himalayas but it rains over the rest of the country.
(iii) The annual precipitation varies from 400 cm in Meghalaya to less than 10 cm in Ladakh and western Rajasthan.
(iv) Most parts of the country receive rainfall from June to September but some parts like the Tamil Nadu coast gets most of its rains during October and November.
Q. What are the variations in Indian temperature?
(i) In summer the maximum temperature goes up to 50'C in some part of Rajasthan. (ii) Whereas it may be around 20'C in Pehalgam in Jammu and Kashmir. (iii) The night temperature at Drass in Jammu and Kashmir may be as low as minus 45'C. (iv) Thiruvananthapuram, on the other hand may have a temperatuRead more
(i) In summer the maximum temperature goes up to 50’C in some part of Rajasthan.
See less(ii) Whereas it may be around 20’C in Pehalgam in Jammu and Kashmir.
(iii) The night temperature at Drass in Jammu and Kashmir may be as low as minus 45’C.
(iv) Thiruvananthapuram, on the other hand may have a temperature of 20’C in the Thar Desert, the day temperature may rise to 50’C and drop to 15’C the same night.
(vi) On the other hand there is hardly any difference in the day and night temperatures in Andaman and Nicobar islands or in Kerala.
Why has Leh moderate precipitation almost throughout the year?
Leh is also called a cold desert. (i) Leh has moderate precipitation almost throughout the year because of its topographical location. (ii) It lies on the landlocked high Ladakh plateau, beyond the Himalayas. (iii) The local precipitation is very less, but it is well distributed in the form of rainsRead more
Leh is also called a cold desert.
See less(i) Leh has moderate precipitation almost throughout the year because of
its topographical location.
(ii) It lies on the landlocked high Ladakh plateau, beyond the Himalayas.
(iii) The local precipitation is very less, but it is well distributed in the form
of rains in summers and snowfall in winters’