The Anthropocene: hard evidence for a human-driven Earth

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 The Anthropocene: hard evidence for a human-driven Earth
Posted by ap507 at Jan 07, 2016 07:53 PM | Permalink
Leicester researchers involved in study into new geological epoch

The Anthropocene: hard evidence for a human-driven Earth

The evidence for a new geological epoch which marks the impact of human activity on the Earth is now overwhelming according to a recent paper by an international group of geoscientists. The Anthropocene, which is argued to start in the mid-20th Century, is marked by the spread of materials such as aluminium, concrete, plastic, fly ash and fallout from nuclear testing across the planet, coincident with elevated greenhouse gas emissions and unprecedented trans-global species invasions.

An international group of scientists is studying whether human activity has driven the Earth into a new geological epoch – the Anthropocene. They ask: to what extent are human actions recorded as measurable signals in geological strata, and is the Anthropocene world markedly different from the stable Holocene Epoch of the last 11,700 years that allowed human civilization to develop?

The Holocene Epoch has been a time during which human societies advanced by gradually domesticating the land to increase food production, built urban settlements and became proficient at developing the water, mineral and energy resources of the planet. The proposed Anthropocene Epoch, however, is marked as a time of rapid environmental change brought on by the impact of a surge in human population and increased consumption during the ‘Great Acceleration’ of the mid-20th century.

Dr Colin Waters of the British Geological Survey said: “Humans have long affected the environment, but recently there has been a rapid global spread of novel materials including aluminium, concrete and plastics, which are leaving their mark in sediments. Fossil-fuel combustion has dispersed fly ash particles worldwide, pretty well coincident with the peak distribution of the ‘bomb spike’ of radionuclides generated by atmospheric testing of nuclear weapons.” “All of this shows that there is an underlying reality to the Anthropocene concept”, commented Jan Zalasiewicz of the University of Leicester, a co-author and working group Chair.

The study, co-authored by 24 members of the Anthropocene Working Group, shows that humans have changed the Earth system sufficiently to produce a range of signals in sediments and ice, and these are sufficiently distinctive to justify recognition of an Anthropocene Epoch in the Geological Time Scale. In 2016 the Anthropocene Working Group will gather more evidence on the Anthropocene, which will help inform recommendations on whether this new time unit should be formalized and, if so, how it might be defined and characterized.

A number of UK members of the group have contributed to this study, Colin Waters (lead author and Secretary of the group) and Michael Ellis, both from the British Geological Survey, Jan Zalasiewicz, Mark Williams and Matt Edgeworth from Leicester University and Colin Summerhayes from Cambridge University have provided significant input to this study and maintain the UK’s strong involvement in research into the Anthropocene concept.

 

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For further details or to arrange media interviews please contact:

Clive Mitchell, BGS Press Office, Keyworth, Nottingham, NG12 5GG

Office           +44 (0)115 936 3257 Mobile:          + 44 (0)7815 537 439

Email:           cjmi@bgs.ac.uk                 Twitter          @CliveBGS

Notes for Editors

The paper referred to in the press release is:

Colin Waters et al (2016) The Anthropocene is functionally and stratigraphically distinct from the Holocene. Science.

More information, including a copy of the paper, can be found online at the Science press package at http://www.eurekalert.org/jrnls/sci. You will need your user ID and password to access this information.

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The following is available for interview:

    Dr Colin Waters, Geologist, British Geological Survey (and Secretary of the Anthropocene Working Group)
    Prof Jan Zalasiewicz, University of Leicester (and Chair of the group)

For additional information go to: www.bgs.ac.uk

The British Geological Survey

The British Geological Survey (BGS), a component body of the Natural Environment Research Council (NERC), is the nation's principal supplier of objective, impartial and up-to-date geological expertise and information for decision making for governmental, commercial and individual users. The BGS maintains and develops the nation's understanding of its geology to improve policy making, enhance national wealth and reduce risk. It also collaborates with the national and international scientific community in carrying out research in strategic areas, including energy and natural resources, our vulnerability to environmental change and hazards, and our general knowledge of the Earth system. More about the BGS can be found at www.bgs.ac.uk.

The Natural Environment Research Council

The Natural Environment Research Council (NERC) is the UK's main agency for funding and managing world-class research, training and knowledge exchange in the environmental sciences. It coordinates some of the world's most exciting research projects, tackling major issues such as climate change, food security, environmental influences on human health, the genetic make-up of life on earth, and much more. NERC receives around £300 million a year from the government's science budget, which it uses to fund research and training in universities and its own research centres. www.nerc.ac.uk

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http://www2.le.ac.uk/offices/press/press-releases/2016/january/the-anthropocene-hard-evidence-for-a-human-driven-earth