Featured Research

from universities, journals, and other organizations

First satellite deforestation tracker for whole of Latin America

Date:
June 19, 2012
Source:
King's College London
Summary:
Scientists have developed the first ever system to monitor deforestation across Latin America in near real-time using satellite data. Preliminary results from the new system reveal that in parts of Colombia, deforestation has increased by 340 percent since 2004; and over a million hectares of forest have been lost in the Gran Chaco region of Paraguay.

This shows deforestation around the dry Chaco of Paraguay from 2004-2011.
Credit: www.terra-i.org/Karolina Argote/Louis Reymondin

A team of researchers including Dr Mark Mulligan from the Department of Geography at King's, in collaboration with colleagues in Colombia, the UK, USA and Switzerland, have developed the first ever system to monitor deforestation across the whole of Latin America in near real-time, using satellite data.

The new satellite system, known as Terra-i, was launched last week in time for the Rio+20 UN environment conference and is soon to be expanded to cover all tropical regions. Although Brazil has had a sophisticated near real-time deforestation monitoring system in place since 2008, until now there has been no equivalent for the rest of Latin America.

Terra-i has been developed to monitor changes to land cover every 16 days and for every 250 metres on the ground, in order to help national governments, conservation organisations and those implementing climate-related policy to assess recent trends in deforestation and emerging hotspots of change. The system uses data supplied by NASA's MODIS satellite sensor and is the result of collaboration between the International Center for Tropical Agriculture (CIAT) in Colombia, The Nature Conservancy (TNC) in the USA and South America, the School of Engineering and Management of Vaud (HEIG-VD) in Switzerland and King's College London.

Deforestation can lead to widespread loss of biodiversity and also impacts the 'ecosystem services' that foster a stable climate and secure freshwater supplies. However, in many parts of the world the scale and pattern of deforestation is infrequently and inconsistently monitored and this makes management of change very difficult.

Huge volumes of data need to be processed to detect land cover change at a 250m spatial resolution every 16 days. Moreover, separating real human-induced changes, such as deforestation, from changes brought about by natural seasonality and by droughts, floods or persistent cloud cover, has made the development of an operational monitoring system a real challenge. The availability of MODIS imagery means that assessment of land cover change can be made in a geographically consistent manner between countries and also updated frequently.

The scientific development of the Terra-i project was carried out by Louis Reymondin, PhD researcher in the Department of Geography at King's, under the supervision of Dr Mark Mulligan and in collaboration with researchers at CIAT and HEIG-VD with funding from TNC.

'We developed a computational neural network and 'trained' it with data from 2000-2004 to recognise the normal changes in vegetation greenness due to seasonal variation in rainfall in different areas,' said Dr Mulligan, who is attending the Rio+20 conference this week.

'The network now recognises where and when greenness suddenly changes well beyond these normal limits as a result of deforestation. The system runs on data for every 250 square metres of land from Mexico to Argentina shortly after the data comes in from MODIS and highlights the pixels that significantly change every 16 days, writing these results to Google Maps for easy visualisation,' he said.

Preliminary data from Terra-i show that in Caquetá, Colombia for example, deforestation grew from around 4,880 hectares in 2004 to 21,440 in 2011, up by 340 per cent. Deforestation has grown significantly in the buffer zones of the Chiribiquete National Park where deforestation rates increased by 196 per cent from 2010 to 2011.

The Gran Chaco in Paraguay is the second largest forested area in South America. Terra-i found that between 2004 and 2010 over a million hectares of this area was deforested with a peak in 2009 of 454,700 hectares.

'As we approach Rio+20 where the world will define the targets that will guide us along the road to a more sustainable development, it is critical that we deploy the appropriate tools to carefully monitor and manage our landscapes,' said Dr Mulligan.

'We need to ensure that we maintain enough farmland to feed the nine billion people to come, but we must also have protected natural landscapes that provide clean water, a stable climate, a refuge for biodiversity and space for increasingly urbanised populations to experience and appreciate the wonders of nature.

'Achieving the right balance between intelligently intensive agriculture and protected natural environments across the world will be fundamental to achieving truly sustainable development and requires sophisticated, geographically detailed and timely tools such as Terra-i to support appropriate policy and decision-making.'


Story Source:

The above story is based on materials provided by King's College London. Note: Materials may be edited for content and length.


Cite This Page:

King's College London. "First satellite deforestation tracker for whole of Latin America." ScienceDaily. ScienceDaily, 19 June 2012. <www.sciencedaily.com/releases/2012/06/120619103953.htm>.
King's College London. (2012, June 19). First satellite deforestation tracker for whole of Latin America. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2012/06/120619103953.htm
King's College London. "First satellite deforestation tracker for whole of Latin America." ScienceDaily. www.sciencedaily.com/releases/2012/06/120619103953.htm (accessed July 23, 2014).

Share This




More Earth & Climate News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Orleans Plans to Recycle Cigarette Butts

New Orleans Plans to Recycle Cigarette Butts

AP (July 21, 2014) — New Orleans is the first U.S. city to participate in a large-scale recycling effort for cigarette butts. The city is rolling out dozens of containers for smokers to use when they discard their butts. (July 21) Video provided by AP
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) — A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
Spectacular Lightning Storm Hits London

Spectacular Lightning Storm Hits London

AFP (July 19, 2014) — A spectaCular lightning storm struck the UK overnight Friday. Images of lightning strikes over the Shard and Tower Bridge in central London. Duration: 00:23 Video provided by AFP
Powered by NewsLook.com
A Centuries' Old British Tradition Is Far from a Swan Song

A Centuries' Old British Tradition Is Far from a Swan Song

AFP (July 19, 2014) — As if it weren't enough that the Queen is the Sovereign of the UK and 15 other Commonwealth realms, she is also the owner of all Britain's unmarked swans. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins