Population is represented by maps of total, urban, rural population and population density as well as built-up area.Īll HYDE versions can be downloaded from Also grazing lands are provided, divided into more intensively used pasture, converted rangeland and non-converted natural (less intensively used) rangeland. ![]() Categories include cropland, with a new distinction into irrigated and rain fed crops (other than rice) and irrigated and rain fed rice. HYDE is and internally consistent combination of updated historical population (gridded) estimates and land use for the past 12,000 years. Therefore, HYDE covers the whole Holocene, and is not only used by IMAGE, but also by many other modelers and teachers, to better understand the underlying processes and consequences of land changes, so that we can make better policy decisions for a sustainable future. So, it really changes how we perceive the timing of human impact on the global climate system. ![]() “His hypothesis is arguing that the significant footprint of human add-on to climate began thousands of years ago and not just 150 years or so, which is the conventional view.” Think of permanent agriculture, livestock herding, mining and largescale conversion (deforestation) of natural ecosystems. This is important since land use (change) has been (and still is) a significant factor to (past) climate change – and a possible tool to mitigate future climate change as well.Ĭurrently, a heavily debated hypothesis about past changes in human history is the one formulated by Bill Ruddiman, a marine biologist. Scientists from various disciplines worldwide nowadays poole their knowledge of past land use - and pushed back the date when human farming and other practices began altering the planet.
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