Sentences with phrase «early global land use»

Kees Klein Goldewijk provided updates on his early global land use reconstructions (HYDE going to 3.2 & 4.0).

Not exact matches

All of this work will soon be advanced enormously by a major new collaborative international working group led by Kathleen Morrison, Land Use 6000 (LU6K), which aims to provide empirical global reconstructions of land use and land cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PALand Use 6000 (LU6K), which aims to provide empirical global reconstructions of land use and land cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PAGUse 6000 (LU6K), which aims to provide empirical global reconstructions of land use and land cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PAland use and land cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PAGuse and land cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PAland cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PALand Cover 6000 project (LC6K) of PAGES.

New global land use datasets are being developed that indicate that human use of land may have been far more extensive at much earlier times - most of the terrestrial biosphere may have been transformed by humans long before the 20th century - maybe even by 3000 years ago!

An early 2008 study led by Tim Searchinger of Princeton University that was published in Science used a global agricultural model to show that when including the land clearing in the tropics, expanding U.S. biofuel production increased annual greenhouse gas emissions dramatically instead of reducing them, as more narrowly based studies claimed.

If our assumed land use changes occur a decade earlier, CO2 returns to 350 ppm several years earlier; however that has negligible effect on the maximum global temperature calculated below.

Although these new global land - use histories remain at an early stage of development, their quantitative and spatially detailed global predictions offer an unprecedented opportunity to investigate the global extent, timing, driving forces, and impacts of land use as a process transforming the Earth System over the Holocene.

As a result of this emphasis and the prior absence of adequate tools, theory, and data, quantitative global land - use histories for earlier periods of the Holocene have only recently been developed (4, 19 ⇓ — 21).

The Early Anthropogenic Hypothesis (108) posits that mid-Holocene increases in CO2 and CH4 resulted from early land clearing and other agricultural practices and that these unprecedented interglacial trends in atmospheric composition set global climate on a trajectory toward warmer conditions long before human use of fossil fuels (108, Early Anthropogenic Hypothesis (108) posits that mid-Holocene increases in CO2 and CH4 resulted from early land clearing and other agricultural practices and that these unprecedented interglacial trends in atmospheric composition set global climate on a trajectory toward warmer conditions long before human use of fossil fuels (108, early land clearing and other agricultural practices and that these unprecedented interglacial trends in atmospheric composition set global climate on a trajectory toward warmer conditions long before human use of fossil fuels (108, 109).

Regardless of whether early land use significantly affected global climate, understanding the global role of land use in determining the onset and magnitude of anthropogenic climate change is critical for gauging the climatic impact of current and future modifications of the terrestrial biosphere, including efforts to offset fossil fuel emissions by reducing deforestation (114).

This analytical document captures early observations in engaging the private sector, particularly multinational companies involved in global agricultural commodity supply chains, in the context of emission reductions programs to address land use change.