Trophical savanna

Tropical rain forest
Rain forests are characterized by high rainfall, with definitions setting minimum normal annual rainfall between 1,750 millimetres (69 in) and 2,000 millimetres (79 in). Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year.[9] Rainforests are home to half of all the living animal and plant species on the planet.[10] Tropical rain forests are called the "world's largest pharmacy" because over one-quarter of modern medicines originate from its plants.[11] The undergrowth in a rainforest is restricted in many areas by the lack of sunlight at ground level.[12] This makes it possible for people and other animals to walk through the forest. If the leaf canopy is destroyed or thinned for any reason, the ground beneath is soon colonized by a dense tangled growth of vines, shrubs and small trees called a jungle.[13]


Onset dates and prevailing wind currents of the southwest summer monsoon.
[edit] Tropical monsoon
A monsoon is a seasonal prevailing wind which lasts for several months, ushering in a region's rainy season. The term was first used in English in India, Bangladesh, Pakistan and neighboring countries to refer to the big seasonal winds blowing from the Indian Ocean and Arabian Sea in the southwest bringing heavy rainfall to the region.[14] In hydrology, monsoon rainfall is considered to be that which occurs in any region that receives the majority of its rain during a particular season. This allows other regions of world such as within North America, South America. Sub-Saharan Africa, Australia and East Asia to qualify as monsoon regimes.[15] In terms of total precipitation and total area covered, the monsoons affecting the Indian subcontinent dwarf the North American monsoon. The South Asian monsoon affects larger number of people due to the high density of population within that part of the world.