one reason for the distribution of tropical rainforests around the world

The equatorial latitude of tropical rainforests and tropical deciduous forests keeps day length and mean temperature fairly constant throughout the year. The sun rises daily to a near-vertical position at noon, ensuring a high level of incoming radiant energy at all seasons. Although there is no cold season during which plants experience unfavorable temperatures that prohibit growth, there are many local variations in climate that result from topography, and these variations influence and restrict rainforest distribution within the tropics.Tropical rainforests occur in regions of the tropics where temperatures are always high and where rainfall exceeds about 1,800 to 2,500 mm (about 70 to 100 inches) annually and occurs fairly evenly throughout the year. Similar hot climates in which annual rainfall lies between about 800 and 1,800 mm and in which a pronounced season of low rainfall occurs typically support tropical deciduous forests—i.e., rainforests in which up to about three-quarters of the trees lose their leaves in the dry season. The principal determining climatic factor for the distribution of rainforests in lowland regions of the tropics, therefore, is rainfall, both the total amount and the seasonal variation. Soil, human disturbance, and other factors also can be important controlling influences.The climate is always hot and wet in most parts of the equatorial belt, but in regions to its north and south seasonal rainfall is experienced. During the summer months of the Northern Hemisphere—June to August—weather systems shift northward, bringing rain to regions in the northern parts of the tropics, as do the monsoon rains of India and Myanmar. Conversely, during the Southern Hemisphere’s summer, weather systems move southward, bringing rain from December to February to places such as northern Australia. In these hot, seasonally wet areas grow tropical deciduous forests, such as the teak forests of Myanmar and Thailand. In other locations where conditions are similar but rainfall is not so reliable or burning has been a factor, savannas are found.Topographic factors influence rainfall and consequently affect rainforest distribution within a region. For example, coastal regions where prevailing winds blow onshore are likely to have a wetter climate than coasts that experience primarily offshore winds.Learn more about Rainforests:https://brainly.com/question/27748876