Journal ArticleDOI
Global Percent Tree Cover at a Spatial Resolution of 500 Meters: First Results of the MODIS Vegetation Continuous Fields Algorithm
TLDR
The first results of the MODIS vegetation continuous field algorithm's global percent tree cover are presented in this article, where a supervised regression tree algorithm is used to estimate tree cover per 500m MODIS pixel.Abstract:
The first results of the Moderate Resolution Imaging Spectroradiometer (MODIS) vegetation continuous field algorithm's global percent tree cover are presented. Percent tree cover per 500-m MODIS pixel is estimated using a supervised regression tree algorithm. Data derived from the MODIS visible bands contribute the most to discriminating tree cover. The results show that MODIS data yield greater spatial detail in the characterization of tree cover compared to past efforts using AVHRR data. This finer-scale depiction should allow for using successive tree cover maps in change detection studies at the global scale. Initial validation efforts show a reasonable relationship between the MODIS-estimated tree cover and tree cover from validation sites.read more
Citations
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High-Resolution Global Maps of 21st-Century Forest Cover Change
Matthew C. Hansen,Peter Potapov,Rebecca Moore,M. Hancher,Svetlana Turubanova,Alexandra Tyukavina,David Thau,Stephen V. Stehman,Scott J. Goetz,Thomas R. Loveland,Anil Kommareddy,A. Egorov,Louise Chini,Christopher O. Justice,John R. Townshend +14 more
TL;DR: Intensive forestry practiced within subtropical forests resulted in the highest rates of forest change globally, and boreal forest loss due largely to fire and forestry was second to that in the tropics in absolute and proportional terms.
Journal ArticleDOI
Estimates of global terrestrial isoprene emissions using MEGAN (Model of Emissions of Gases and Aerosols from Nature)
TL;DR: The Model of Emissions of Gases and Aerosols from Nature (MEGAN) is used to quantify net terrestrial biosphere emission of isoprene into the atmosphere as mentioned in this paper.
Journal ArticleDOI
Global fire emissions and the contribution of deforestation, savanna, forest, agricultural, and peat fires (1997-2009)
G. R. van der Werf,James T. Randerson,Louis Giglio,Louis Giglio,G. J. Collatz,Mingquan Mu,Prasad S. Kasibhatla,Douglas C. Morton,Ruth DeFries,Yufang Jin,T. T. van Leeuwen +10 more
TL;DR: In this paper, the authors used a revised version of the Carnegie-Ames-Stanford-Approach (CASA) biogeochemical model and improved satellite-derived estimates of area burned, fire activity, and plant productivity to calculate fire emissions for the 1997-2009 period on a 0.5° spatial resolution with a monthly time step.
Journal ArticleDOI
Interannual variability in global biomass burning emissions from 1997 to 2004
G. R. van der Werf,James T. Randerson,Louis Giglio,G. J. Collatz,Prasad S. Kasibhatla,Avelino F. Arellano,Avelino F. Arellano +6 more
TL;DR: In this paper, the authors investigated fire emissions during the 8 year period from 1997 to 2004 using satellite data and the CASA biogeochemical model, and found that on average approximately 58 Pg C year −1 was fixed by plants as NPP, and approximately 95% of this was returned back to the atmosphere via R h.
Journal ArticleDOI
Natural climate solutions
Bronson W. Griscom,Bronson W. Griscom,Justin Adams,Peter W. Ellis,Richard A. Houghton,Guy Lomax,Daniela A. Miteva,William H. Schlesinger,David Shoch,Juha Siikamäki,Pete Smith,Peter B. Woodbury,Chris Zganjar,Allen Blackman,João S. Campari,Richard T. Conant,Christopher Delgado,Patricia Elias,Trisha Gopalakrishna,Marisa R. Hamsik,Mario Herrero,Joseph M. Kiesecker,Emily Landis,Lars Laestadius,Lars Laestadius,Sara M. Leavitt,Susan Minnemeyer,Stephen Polasky,Peter Potapov,Francis E. Putz,Jonathan Sanderman,Marcel Silvius,Eva K. Wollenberg,Joseph Fargione +33 more
TL;DR: It is shown that NCS can provide over one-third of the cost-effective climate mitigation needed between now and 2030 to stabilize warming to below 2 °C.
References
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Journal ArticleDOI
Global land cover classification at 1 km spatial resolution using a classification tree approach
TL;DR: In this paper, a 1km spatial resolution land cover classification using data for 1992-1993 from the Advanced Very High Resolution Radiometer (AVHRR) is presented. But the approach taken involved a hierarchy of pair-wise class trees where a logic based on vegetation form was applied until all classes were depicted.
Journal ArticleDOI
Linear mixing and the estimation of ground cover proportions
J. J. Settle,Nick Drake +1 more
TL;DR: In this paper, the relative proportions of ground cover components in a mixed pixel are estimated using a linear model for signal mixing and a number of methods, closely related, for estimating the proportions.
Journal ArticleDOI
Validation of the land-surface temperature products retrieved from Terra Moderate Resolution Imaging Spectroradiometer data
TL;DR: In this paper, the authors presented the status of land-surface temperature (LST) standard products retrieved from Earth Observing System (EOS) Moderate Resolution Imaging Spectroradiometer (MODIS) data.
Journal ArticleDOI
Classification of multispectral images based on fractions of endmembers: Application to land-cover change in the Brazilian Amazon
TL;DR: In this article, four time-sequential Landsat Thematic Mapper (TM) images of an area of Amazon forest, pasture, and second growth near Manaus, Brazil were classified according to dominant ground cover, using a new technique based on fractions of spectral endmembers.