What is PE index in climatology?
Instead of vegetation, as done in 1931 classification, he based his new scheme of climatic classification on the concept of potential evapotranspiration (PE) which is in fact an index of thermal efficiency and water loss because it represents the amount of transfer of both moisture and heat to the atmosphere from soils …
What is PE index in geography?
Precipitation efficiency ratio (P/E ratio) is calculated by dividing total monthly precipitation by monthly evaporation and precipitation efficiency index (P/E index) is derived by summing the precipitation efficiency ratios for 12 months of a year.
What are basis of climate classification of Thornthwaite?
Thornthwaite, that divides climates into groups according to the vegetation characteristic of them, the vegetation being determined by precipitation effectiveness (P/E, where P is the total monthly precipitation, and E is the total monthly evaporation).
What is the value of climate classification systems?
In addition to identifying climates, the system can be used to analyze ecosystem conditions and identify the main types of vegetation within climates. Due to its link with the plant life of a given region, the system is useful in predicting future changes in plant life within that region.
What is the difference between Koppen and Thornthwaite systems?
While Koeppen gave six major climatic Regions, Thornthwaite gave eight and differentiated between true arid and semi-arid and between true polar and sub-polar. … Koeppen made a clear distinction between dry arid and dry polar regions.
What is precipitation effectiveness index?
also called precipitation– evaporation index) For a given location, a measure of the long-range effectiveness of precipitation in promoting plant growth: that is, it is equal to 10 times the sum of the monthly precipitation–evaporation ratios (monthly precipitation amounts divided by monthly evaporation amounts).
What is potential evapotranspiration Upsc?
Potential Evapotranspiration means the total amount of evaporation and transpiration that occurs if sufficient water sources were available.
Which of the following is not a factor in determining climate?
Longitude is the factor that does not determine the climate of the place.
Why is evapotranspiration higher in summer?
PET is higher in the summer, on less cloudy days, and closer to the equator, because of the higher levels of solar radiation that provides the energy for evaporation.
How do you calculate potential evapotranspiration?
the FAO+56 IS THE BEST AND ACCURATE FORMULA FOR CALCULATING THE ET0. Potential evapotranspiration (ETP), expressed as the evaporated water slice, is the sum of the amounts of water that can evaporate and transpire on a given surface and for a well-defined period of time, considering inputs from sufficient water.
Which climate type extends northward and southward from the equator to about latitude 15 to 25?
Tropical moist climates extend northward and southward from the equator to about 15 to 25° of latitude.
What are the basis of classification of climate?
The basis are: 1. Climatic Classification Based on Temperature 2. Climatic Classification Based on Rainfall 3. Climatic Classification Based on Vegetation 4.
What is the name of the climate classification system?
The Köppen climate classification system categorizes climate zones throughout the world based on local vegetation. Wladimir Köppen, a German botanist and climatologist, first developed this system at the end of the 19th century, basing it on the earlier biome research conducted by scientists.
Which parameters are part of most climate classification schemes?
The Köppen Climate Classification System is the most widely used system for classifying the world’s climates. Its categories are based on the annual and monthly averages of temperature and precipitation.