2000~2005년 사라진 열대우림

Gross forest loss in tropical countries, 2000-2005 according to Harris et al (2012).

A study published last month in the journalSciencecame up with new estimates of tropical forest loss between 2000 and 2005. The research — led by Nancy Harris of Winrock International and also involving scientists from Applied GeoSolutions, NASA's Jet Propulsion Laboratory and the University of Maryland — was based on analysis of remote sensing data calibrated with field studies.

Like other assessments, the study found Brazil and Indonesia lost the greatest extent of forest during the period. But some of their data differed substantially from the default source of forest data, the U.N. Food and Agriculture Organization. For example, according to Harris and colleagues, Indonesia's gross forest loss was twice as high as estimated by FAO, while India's was one million hectares higher. But Myanmar and Tanzania had substantially lower loss under the methodology used in theSciencepaper.

Countries with the highest gross forest loss between 2000 and 2005 according to the new study and earlier work by the FAO. Click image to enlarge.


The objective of the study was to quantify emissions from deforestation. Harris and colleagues estimated gross carbon emissions from deforestation at 810 million metric tons (with a 90 percent confidence interval of 0.57-1.22 billion tons) per year from 2000-2005, significantly below earlier calculations. Brazil and Indonesia accounted for 55 percent of gross emissions from tropical deforestation during the study period, while dry forests accounted for 40 percent of tropical forest loss but amounted to only 17 percent of emissions.

The study did not look at carbon emissions from logging or other forms of forest degradation, including peatlands drainage and burning. The authors noted another study found emissions from these sources amounted to 272 million tons per year in the study period, adding roughly a third more to their results. The research also did not account for forest recovery in the tropics, nor land use change in temperate regions.

Gross forest loss in tropical countries, 2000-2005 according to Harris et al (2012).

The researchers say the next phase of their analysis will look at the 2006-2010 period.

For more on the study, including other charts and maps, seeDeforestation accounts for 10 percent of global carbon emissions, argues new study.


Data table
Note: this table only includes mean and median estimates from the study. For the full results, download thesupplemental online materials[PDF].

		Forest Area 2000		Gross Forest Cover Loss		Forest Carbon Stock Density		Emissions from Deforestation
				(Median estimate)		(Mean estimate)		(Median estimate)
Country		(Million ha)		ha/yr		tons/ha		M tC/yr
Brazil		458		3,292,000		116		340
Indonesia		107		701,000		155		105
Argentina		49		437,000		24		10
Paraguay		21		242,000		27		9
Malaysia		22		233,000		179		41
India		42		206,000		104		18
DR Congo		167		203,000		128		23
Mozambique		34		196,000		42		9
Myanmar		33		186,000		155		29
Tanzania		23		149,000		45		7
Mexico		46		140,000		48		8
Colombia		63		137,000		138		14
Thailand		17		134,000		126		16
Zambia		29		134,000		43		7
Bolivia		61		129,000		90		11
Angola		49		126,000		47		6
Zimbabwe		9		119,000		30		5
Venezuela		49		115,000		134		9
South Africa		13		99,000		28		4
Sudan		17		95,000		45		4
Laos		16		85,000		164		15
Nigeria		12		81,000		83		4
Ethiopia		16		68,000		53		4
Chile		17		67,000		52		6
CAR		36		65,000		66		4
Cambodia		9		58,000		127		8
Peru		68		57,000		158		7
Vietnam		14		55,000		127		8
Cameroon		26		54,000		142		7
Madagascar		16		52,000		70		3
Guatemala		6		50,000		92		5
Nicaragua		5		50,000		113		6
PNG		31		50,000		152		7
Botswana		4		48,000		19		1
Philippines		10		40,000		118		6
Cote d’Ivoire		8		39,000		85		3
Kenya		4		39,000		54		2
Ecuador		13		37,000		149		4
Chad		5		37,000		31		1
Ghana		5		30,000		94		2
Caribbean		7		28,000		46		2
Mali		3		28,000		44		1
Guinea		9		27,000		57		2
Rep. of Congo		23		26,000		160		3
Gabon		19		24,000		164		4
Uganda		5		23,000		65		1
Somalia		1		20,000		34		1
Uruguay		3		19,000		28		1
Honduras		6		17,000		77		1
Namibia		1		17,000		16		-
Nepal		5		16,000		103		2
Sierra Leone		3		16,000		83		1
Liberia		7		14,000		147		2
Senegal		2		14,000		26		-
Guyana		16		13,000		161		1
Costa Rica		3		12,000		105		1
Panama		3		12,000		115		1
Benin		2		12,000		29		-
Malawi		2		10,000		40		-
Belize		1		9,000		105		1
Bangladesh		2		7,000		94		1
Sri Lanka		3		7,000		94		1
Suriname		12		6,000		161		1
Togo		1		6,000		49		-
Bhutan		2		4,000		152		1
Burundi		1		3,000		64		-
Equatorial Guinea		2		3,000		160		1
Lesotho		1		3,000		19		-
El Salvador		1		2,000		49		-
French Guiana		7		2,000		160		-
Guinea-Bissau		1		2,000		37		-
Swaziland		1		2,000		32		-

CITATION: Nancy L. Harris, Sandra Brown, Stephen C. Hagen, Sassan S. Saatchi, Silvia Petrova, William Salas, Matthew C. Hansen, Peter V. Potapov, and Alexander Lotsch. Baseline Map of Carbon Emissions from Deforestation in Tropical Regions. Science 22 June 2012: Vol. 336 no. 6088 pp. 1573-1576 DOI: 10.1126/science.1217962

Read more:http://news.mongabay.com/2012/0729-chart-tropical-forest-loss.html#ixzz229B5lZg3