This type of climate is found on the eastern margin of continent in warm temperate latitudes, just outside the tropics & comparatively has more rainfall than the Mediterranean climate in the same latitudes, coming mainly in summers.
- Eastern margin temperate climate can further be subdivided into 3 major type :
|China Type||Temperate monsoonal (Central & North China including southern Japan)|
|Gulf Type||South eastern United States bordering Gulf of Mexico (slight monsoonal)|
|Natal Type||Natal (Africa), South Wales (Australia), Parana (Southern Brazil)-Paraguay-Uruguay & Northern Argentina (South America)|
- Warm temperate eastern margin climate is typified by a warm, moist summer & a cool, dry winter strongly modified by maritime influence.
- Occasionally, the penetration of cold air from the continental interiors may bring down the temperature to the freezing point, but most of the time it is pleasantly warm.
- Rainfall is anything in-between 75 cm to 150 cm, fairly distributed throughout the year, with no dry month, except in the interiors of central China.
- Rain comes either as convection or orographic in summers & from depressions in winters.
China Type Climate
- Great land mass of Asiatic interior & Pacific Ocean induces great pressure changes between summers & winters, giving rise to temperate monsoonal type of climate.
- In summers, intense heating of Asiatic interior sets up a region of low pressure in summer & tropical pacific air stream is drawn in as the rain bearing South-East Monsoon
- This results in heavy precipitation in China, approx. 100 cm of rainfall per annum, decreasing landwards with summer maximum in June & July
- In winters, a steep pressure gradient is set up between the cold interiors of Mongolia & Siberia, & a warmer Pacific coastland;
- This results in outward flow of continental polar air as the North West Monsoon, bitterly cold & very dry, causing only a little rain but considerate snow as the cold winds are warmed & moistened.
- Other characteristic features of China type of climate is great annual temperature range & occurrence of typhoons (intense tropical cyclones) that originate in Pacific Ocean, & move westward to the coastlands, bordering South China Sea.
Gulf Type Climate
- Gulf-Atlantic regions of the US experience a type of climate similar to that of central china except the monsoonal characteristics are less well established.
- There is no complete reversal of winds & the pressure gradient between mainland America & Atlantic Ocean is less marked.
- Annual rainfall is heavy with annual average 100 – 150 cm
- No distinct dry period with a tendency towards summer maximum, brought by the on shore trade winds which swings landward from the Atlantic.
- The amount of rain is increased by frequent thunderstorms in summers & hurricanes by Sep & October, with some places showing a secondary maximum in winters.
- Annual range of temperature is much smaller comparative to china type of climate
- Sometimes violent tornedoes occur, due to intense heating of the land.
Natal Type Climate
- The narrowness of the continents & the dominance of maritime influence eliminate the monsoonal elements, which characterize the corresponding climates of N- Hemisphere.
- The south east trade winds bring about a more even distribution of rainfall throughout the year with mean annual of approx. 100 – 150 cm.
- The passage of depressions along the southern edges of warm temperate eastern margins results in slight autumn-winter maximum i.e. from March – July.
Annual temperature range is small without any really cold month; however southern continents have violent local storms viz. Southerly burster (a violent cold wind) in South wales, corresponding cold wind in Argentina & Uruguay is Pampero & Berg (a hot, dry wind) in south east Africa.
- The eastern margin of the warm temperate latitudes has a much heavier rainfall than either the western margin or the continental interiors & thus has luxuriant vegetation.
- The lowlands carry both evergreen broad leave forests & deciduous trees, quite similar to those of the tropical monsoon forests.
- On the highlands, are various species of conifers such as pines & cypresses, which are important soft woods
- As the perennial plant growth is not checked by either a dry season as in Mediterranean, or a cold season as in cool temperate regions, conditions are well suited to a rich variety of plant life, including grass, ferns, lianas, bamboos, palms & forests, with a well distributed rainfall over the year.
- Warm temperate eastern margins are home of a number of valuable timber & economic viable species viz.
|Parana Pine, Quebracho (Axebreaker)||SE Brazil, E Paraguay, N Argentina|
|Leaves of Yerba Mate Trees||Paraguay Tea|
|Chestnuts, Ironwoods & Blackwoods||Highlands of Natal|
|Palm trees||Coastal areas of Natal|
|Oak, Camphor, Camelia & Magnolia||China & Southern Japan|
The warm temperate eastern margins are the most productive parts of middle latitudes, due to adequate rainfall, no prolong drought with the cold season warm enough for most of the crops to survive; though summer is the busiest part of farming year
|China||Rice, Tea & Mulberries (for feeding silk worms for sericulture)|
|Gulf (N America)||Corn, Cotton, Tobacco|
|Natal (S America)||Cane sugar, Cotton & Tobacco|
|South America||Coffee, Maize, Pines, Paraguay Tea, Wheat, Cattle & Sheep|
|South Wales & Victoria||Dairying (Milk, Butter, Cheese), Cotton, Cane Sugar, Maize|
Note → Despite being world’s greatest rice growing area, China do not export & even imports food grains; & grows rice & tea for subsistence purpose only due to its intense population.
- Apart from its ease of cultivation, wrt soil, climate & labour requirements, corns’ most outstanding feature is its prolific yield
- It gives almost twice as much food per acre as wheat or other cereals
- USA accounts for more than 50 % of world’s corn production but exports only 3%
- Most of the corn in USA is used in fattening animals as they allow them to hog the corn down in the fields itself
- This is done to get more monetary gain as fattened animals are sold to the meat plants