Climate modelling of Precipitation in Brazil

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Precipitation

Overview:

The precipitation levels of Brazil vary widely over the country. Most areas of Brazil show moderate precipitation between 1000 to 1500 millimeters a year. Most of rainfall is concentrated during the summer time at south part of the equator. The Amazon region shows higher precipitation level, which is 2000 – 3000 millimeters per year. Especially the western Amazon area shows the higher precipitation level than other areas of Amazon. Yet, Amazon region has three to five-month-long dry season per year but dry season comes in a different seasons depending on the parts of Amazon.

On the contrast of the Amazon region that shows high and regular level of precipitation, Northeast area is semiarid. The northeast area of Brazil is the driest and hottest part of the country; the dry season starts from May and last till November. Most of central-western area of Brazil shows 1500 to 2000 millimeters of rainfall per year but it also has dry seasons in the middle of the year. Meanwhile, the south, Northwest and Atlantic coast shows the similar precipitation per year without a distinct dry season.

Precipitation is closely linked to the air temperature. This temperature fluctuation due to the precipitation may affect the ecology, environment and industry of Brazil.

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Model Analysis:

Two different models are used to get data for the analysis of precipitation. The data was taken from NCAR CCSM model and MPI-ESM-LR model.

Change in precipitation from historical time period (1850 – 2005) to projected (2006 – 2010)

Figure 1         Change in precipitation from historical time period (1850 – 2005) to projected (2006 – 2010)

This data is based on CCSM model. Based on the color bar and region, the precipitation amount can be recalculated in terms of the changes in precipitation (liter) in year per unit area.

While Amazon does not ...

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