Microclimates converge throughout regions of Costa Rica

Among all the factors that contribute to Costa Rica’s amazing biodiversity, its abundance of microclimates and variety of unusual seasons are among the most important. The heterogeneously distributed topography of the country also contributes to the climatic diversity, which makes some regions feel as if they were located in different countries. Experiencing and understanding this phenomenon is simple and can be fun.

The Holdridge life zones system is a generally-accepted method used to classify tropical and subtropical areas into as many as 38 zones ranging from deserts to tundras and from woodlands to forests and scrubs. Based on the Holdridge system, there are more than a dozen life zones in Costa Rica; but, these zones are actually the result of microclimates. In this sense, each of the 11 Conservation Areas defined by the Ministry of the Environment roughly correspond to a microclimate.

Not all scientists agree that the Holdridge life zones system can be accurately applied to Costa Rica. A 1973 research study by Stuart Harris of the University of Calgary argues the following:

The Holdridge system of world life zones as applied to Costa Rica is examined. In spite of the claim that vegetation, soils, and climate are classified in the single system, it can be shown that the system does not adequately predict the soil pattern. Either the system does not do what Holdridge claimed originally or else the vegetation is too rich in the Tropics for valid diagnostic plant associations to be identified in reconnaissance work. It is, therefore, suggested that it might be worth testing the method in temperate regions in order to settle once and for all whether the system is useful.

One of the easiest ways to experience microclimates in Costa Rica is to take a bus trip from Atenas to Cartago or vice versa. This adventure costs about $7 and requires two buses, a total walking distance of about 1.3 km, between three to four hours of your time, and might also require a sweater.

Leaving from hot-and-dry Atenas and crossing the cool-and-crisp Central Valley is refreshing climactic experience. Walking from the Coca Cola bus depot to the Cartago bus terminal in the heart of San Jose should not cause anyone to break a sweat, but a sweater might be needed by the time the second bus reaches the misty and cool city of Cartago. That’s three distinct microclimates in less than four hours.