DETER Indicates 268 km² of Amazon Deforested Area
Hello reader!
It follows one communicates published in english on the day (30/06) in the website of the National Institute for Space Research (INPE) noting that the DETER System indicates 268 km² of Amazon deforested area in May.
Duda Falcão
DETER Indicates 268 km² of
Amazon Deforested Area in May
30/06/2011
An important tool to support Amazon surveillance, DETER - Real Time Deforestation Detection System, of National Institute for Space Research (INPE) - reveals that 268 km ² of Amazon forest have been clearcut or suffered progressive degradation in May 2011. The table below shows deforestation record set in May.
Acre 0.4 km²
Amazonas 29.7 km²
Maranhão 6.5 km²
Mato Grosso 93.7 km²
Pará 65.5 km²
Rondônia 67.9 km²
Tocantins 4.3 km²
On the map below, yellow dots represents the location of an alert issued by DETER. Pink areas demonstrate places that could not be monitored due clouds coverage.
May Alerts Map
Full reports about deforestation in May also in the past months are available on webpage: www.obt.inpe.br/deter
Alert System
Working since 2004, DETER is an Alert System for Support and Control Deforestation. Although data is released monthly or bimonthly, DETER results are sent to IBAMA - responsible to overseeing warning areas - almost daily.
DETER uses data from MODIS Terra satellite sensor, with a 250-meters space resolution, is possible to detect Deforestation Polygons correspondent an area bigger than 25 hectares. Not all deforestation areas largest than 25 hectares are identified by the system due to possible cloud coverage. The smallest sensor resolution used by DETER is compensated by the ability of daily observation, which makes the system a perfect tool to quickly inform deforestation to surveillance authorities.
The numbers demonstrated by DETER are important indicators for Control and Supervision Organizations. However, to compute an annual rate of forest removal by clear-cutting on Amazon, INPE works with PRODES (www.obt.inpe.br/Prodes), that uses high resolution images capable of showing small deforestation points. Due to cloud cover variation between two months, also to satellite resolution, INPE do not recommend to compare data from different months or years obtained by DETER. Every disclosure about DETER system alert, INPE also presents a sample data evaluation report. The reports as well as all data generated by DETER can be found on www.obt.inpe.br/deter
Source: WebSite of the National Institute for Space Research (INPE)
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