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Articles 1 - 4 of 4
Full-Text Articles in Social and Behavioral Sciences
Criteria To Confirm Models That Simulate Deforestation And Carbon Disturbance, Robert Gilmore Pontius
Criteria To Confirm Models That Simulate Deforestation And Carbon Disturbance, Robert Gilmore Pontius
Geography
The Verified Carbon Standard (VCS) recommends the Figure of Merit (FOM) as a possible metric to confirm models that simulate deforestation baselines for Reducing Emissions from Deforestation and forest Degradation (REDD). The FOM ranges from 0% to 100%, where larger FOMs indicate more-accurate simulations. VCS requires that simulation models achieve a FOM greater than or equal to the percentage deforestation during the calibration period. This article analyses FOM's mathematical properties and illustrates FOM's empirical behavior by comparing various models that simulate deforestation and the resulting carbon disturbance in Bolivia during 2010-2014. The Total Operating Characteristic frames FOM's mathematical properties as …
Reconciling Agriculture, Carbon And Biodiversity In A Savannah Transformation Frontier, Lyndon Estes, T. Searchinger, M. Spiegel, D. Tian, S. Sichinga, M. Mwale, L. Kehoe, T. Kuemmerle, A. Berven, N. Chaney, J. Sheffield, E. F. Wood, K. K. Caylor
Reconciling Agriculture, Carbon And Biodiversity In A Savannah Transformation Frontier, Lyndon Estes, T. Searchinger, M. Spiegel, D. Tian, S. Sichinga, M. Mwale, L. Kehoe, T. Kuemmerle, A. Berven, N. Chaney, J. Sheffield, E. F. Wood, K. K. Caylor
Geography
Rapidly rising populations and likely increases in incomes in sub-Saharan Africa make tens of millions of hectares of cropland expansion nearly inevitable, even with large increases in crop yields. Much of that expansion is likely to occur in higher rainfall savannas, with substantial costs to biodiversity and carbon storage. Zambia presents an acute example of this challenge, with an expected tripling of population by 2050, good potential to expand maize and soya bean production, and large areas of relatively undisturbed miombo woodland and associated habitat types of high biodiversity value. Here, we present a new model designed to explore the …
Response Of Carbon Fluxes To Water Relations In A Savanna Ecosystem In South Africa, W. L. Kutsch, N. Hanan, B. Scholes, I. Mchugh, W. Kubheka, H. Eckhardt, Christopher A. Williams
Response Of Carbon Fluxes To Water Relations In A Savanna Ecosystem In South Africa, W. L. Kutsch, N. Hanan, B. Scholes, I. Mchugh, W. Kubheka, H. Eckhardt, Christopher A. Williams
Geography
The principal mechanisms that connect carbon fluxes with water relations in savanna ecosystems were studied by using eddy covariance method in a savanna ecosystem at Kruger National Park, South Africa. Since the annual drought and rewetting cycle is a major factor influencing the function of savanna ecosystems, this work focused on the close inter-connection between water relations and carbon fluxes. Data from a nine-month measuring campaign lasting from the early wet season to the late dry season were used.
Total ecosystem respiration showed highest values at the onset of the growing season, a slightly lower plateau during the main part …
Amplified Carbon Release From Vast West Siberian Peatlands By 2100, Karen E. Frey, Laurence C. Smith
Amplified Carbon Release From Vast West Siberian Peatlands By 2100, Karen E. Frey, Laurence C. Smith
Geography
Extensive new data from previously unstudied Siberian streams and rivers suggest that mobilization of currently frozen, high-latitude soil carbon is likely over the next century in response to predicted Arctic warming. We present dissolved organic carbon (DOC) measurements from ninety-six watersheds in West Siberia, a region that contains the world's largest stores of peat carbon, exports massive volumes of freshwater and DOC to the Arctic Ocean, and is warming faster than the Arctic as a whole. The sample sites span ∼106 km2 over a large climatic gradient (∼55-68°N), providing data on a much broader spatial scale than previous studies and …