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Résultats pour:
Anthropocene
Scientists have been debating the start of the Anthropocene Epoch for 15 years. I was part of those discussions, and I agree with the vote rejecting it.
This volume addresses political action in Anthropocene and tension between the Promethean project of modernity and post-Promethean approach.
This Handbook explains the complexity of the concept of the Anthropocene, scientific and a political concept and also an ideological concept.
Plutonium spike in Canadian lake sediments marks dawn of new epoch in which humanity dominates planet
Presently, there is a scientific debate about which epoch we are in. The discussion centers around the Holocene vs Anthropocene question.
The Anthropocene defines Earth's most recent geologic time period as being human-influenced, or anthropogenic, based on overwhelming global evidence that atmospheric, geologic, hydrologic, biospheric and other earth system processes are now altered by humans. The word combines the root "anthropo", meaning "human" with the root "-cene", the standard suffix for "epoch" in geologic time. The Anthropocene is distinguished as a new period either after or within the Holocene, the current epoch, which began approximately 10,000 years ago (about 8000 BC) with the end of the last glacial period.
A major concern for the world’s ecosystems is the possibility of collapse, where landscapes and the societies they support change abruptly. Accelerating stress levels, increasing frequencies of extreme events and strengthening intersystem connections suggest that conventional modelling approaches based on incremental changes in a single stress may provide poor estimates of the impact of climate and human activities on ecosystems. We conduct xperiments on four models that simulate abrupt changes in the Chilika lagoon fshery, the Easter Island community, forest dieback and lake water quality—representing ecosystems with a range of anthropogenic interactions. Collapses occur sooner under increasing levels of primary stress but additional stresses and/or the inclusion of noise in all four models bring the collapses substantially closer to today by ~38–81%. We discuss the implications for further research and the need for humanity to be vigilant for signs that ecosystems are degrading even more rapidly than previo
Only if there is a fundamental change in the way we manage land we can reach the targets of climate-change mitigation, avert the dramatic loss of biodiversity and make the global food system sustainable.
The Anthropocene Working Group is voting on a so-called Golden Spike, a sedimentary layer somewhere on Earth that best exemplifies the global impact of humans on planet Earth. It's the last, big task in formally defining the Anthropocene, which is being proposed as a new age in geologic time.
Although interest in colonisation has grown throughout the West in recent years, it is mostly limited to historical colonialism. Little attention is paid to the ways in which we colonise the future. However, this is done with the same ruthlessness and short-sightedness with which regions around the world were invaded in earlier times. During the 50th edition of the Huizinga Lecture, David Van Reybrouck focuses on the way in which humanity is currently plundering and enslaving future generations. And further, the violence is not limited to human but affects all life on earth.
The rapid decline of Earth’s most numerous animals is a major threat to the biosphere
Humanity is now a ‘geological superpower’ and declaring a new epoch is critical to tackling its impact, scientists say
Scientists are to pick a location that sums up the current Anthropocene epoch when Homo sapiens made its mark
The specific fallout products released following a nuclear detonation depend on the characteristics of the device detonated and the nature of the detonation. Generally, these products can be organized by the following three categories, based on their mode of generation...
Résumé fr - Alain Vézina - Au cours des 11 700 dernières années, pendant lesquelles la civilisation humaine s'est développée, la Terre a vécu dans ce que les géologues appellent l'époque holocène. Aujourd'hui, la science nous dit que l'époque de l'Holocène s'est achevée sur l'échelle des temps géologiques et qu'elle a été remplacée par une nouvelle époque, plus dangereuse, l'Anthropocène, qui a débuté vers 1950. L'époque de l'Anthropocène se caractérise par une "faille anthropique" dans les cycles biologiques du système terrestre, marquant un changement de réalité dans lequel les activités humaines sont désormais la principale force géologique ayant un impact sur la terre dans son ensemble, générant en même temps une crise existentielle pour la population mondiale. Qu'est-ce qui a provoqué ce changement massif dans l'histoire de la Terre ? Dans cette étude exhaustive, John Bellamy Foster nous apprend qu'un système mondialisé d'accumulation du capital a incité l'humanité à faire son propre ni
Following guidance from the Subcommission on Quaternary Stratigraphy and the International Commission on Stratigraphy, the AWG have completed a binding vote to affirm some of the key questions that were voted on and agreed at the IGC Cape Town meeting in 2016. The details are as follows:
The Anthropocene Working Group has taken a major step towards identifying a “golden spike” location to be used in the formal definition of the Anthropocene. In public meetings held this week, during the Unearthing the Present conference in Berlin, the AWG introduced their Anthropocene short-list — 12 possible candidates for a unique reference location that clearly indicates the beginning of the new epoch.
Humankind is revealed as simultaneously insignificant and utterly dominant in the grand scheme of life on Earth by a groundbreaking new assessment of all life on the planet. The world’s 7.6 billion people represent just 0.01% of all living things, according to the study. Yet since the dawn of civilisation, humanity has caused the loss of 83% of all wild mammals and half of plants, while livestock kept by humans abounds.
The Politics of the Anthropocene' is a sophisticated yet accessible treatment of how human institutions, practices, and principles need to be re-thought in response to the challenges of the Anthropocene, the emerging epoch of human-induced instability in the Earth system and its life-support capacities. The world remains stuck with practices and modes of thinking that were developed in the Holocene - the epoch of around 12,000 years of unusual stability in the Earth system, toward the end of which modern institutions such as states and capitalist markets arose....
Tree diversity is fundamental for forest ecosystem stability and services. However, because of limited available data, estimates of tree diversity at large geographic domains still rely heavily on published lists of species descriptions that are geographically uneven in coverage. These limitations have precluded efforts to generate a global perspective. Here, based on a ground-sourced global database, we estimate the number of tree species at biome, continental, and global scales. We estimated a global tree richness (≈73,300) that is ≈14% higher than numbers known today, with most undiscovered species being rare, continentally endemic, and tropical or subtropical. These results highlight the vulnerability of global tree species diversity to anthropogenic changes.
"Trajectoires du Système Terre dans l'Anthropocène", une étude récente cosignée par Will Steffen, chimiste réputé, analyste des systèmes climatiques et professeur de la science du Système Terre à l'Université nationale australienne, met en garde contre des changements catastrophiques du climat de la Terre si les tendances actuelles en matière d'émissions ne sont pas immédiatement inversées.
The Anthropocene defines Earth's most recent geologic time period as being human-influenced, or anthropogenic, based on overwhelming global evidence that atmospheric, geologic, hydrologic, biospheric and other earth system processes are now altered by humans.
