tsuomela + geology   47

International Commission on Stratigraphy
"The International Commission on Stratigraphy is the largest and oldest constituent scientific body in the International Union of Geological Sciences (IUGS). Its primary objective is to precisely define global units (systems, series, and stages) of the International Chronostratigraphic Chart that, in turn, are the basis for the units (periods, epochs, and age) of the International Geologic Time Scale; thus setting global standards for the fundamental scale for expressing the history of the Earth."
geology  classification  stratification  time  deep-time  international  standards 
july 2018 by tsuomela
Some say climate change marks the Anthropocene, a new geological age. They’re wrong.
An interesting argument against the hubris of defining a geologic epoch on the basis of a short period of human activity ~ last 200 years.
anthropocene  geology  definition 
february 2016 by tsuomela
Defining the Anthropocene : Nature : Nature Publishing Group
"Time is divided by geologists according to marked shifts in Earth’s state. Recent global environmental changes suggest that Earth may have entered a new human-dominated geological epoch, the Anthropocene. Here we review the historical genesis of the idea and assess anthropogenic signatures in the geological record against the formal requirements for the recognition of a new epoch. The evidence suggests that of the various proposed dates two do appear to conform to the criteria to mark the beginning of the Anthropocene: 1610 and 1964. The formal establishment of an Anthropocene Epoch would mark a fundamental change in the relationship between humans and the Earth system."
anthropocene  time  anthropology  geology  chronology  evidence  human  impact  environment 
march 2015 by tsuomela
When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal
"We evaluate the boundary of the Anthropocene geological time interval as an epoch, since it is useful to have a consistent temporal definition for this increasingly used unit, whether the presently informal term is eventually formalized or not. Of the three main levels suggested – an ‘early Anthropocene’ level some thousands of years ago; the beginning of the Industrial Revolution at ∼1800 CE (Common Era); and the ‘Great Acceleration’ of the mid-twentieth century – current evidence suggests that the last of these has the most pronounced and globally synchronous signal. A boundary at this time need not have a Global Boundary Stratotype Section and Point (GSSP or ‘golden spike’) but can be defined by a Global Standard Stratigraphic Age (GSSA), i.e. a point in time of the human calendar. We propose an appropriate boundary level here to be the time of the world's first nuclear bomb explosion, on July 16th 1945 at Alamogordo, New Mexico; additional bombs were detonated at the average rate of one every 9.6 days until 1988 with attendant worldwide fallout easily identifiable in the chemostratigraphic record. Hence, Anthropocene deposits would be those that may include the globally distributed primary artificial radionuclide signal, while also being recognized using a wide range of other stratigraphic criteria. This suggestion for the Holocene–Anthropocene boundary may ultimately be superseded, as the Anthropocene is only in its early phases, but it should remain practical and effective for use by at least the current generation of scientists."
nthropology  history  anthropocene  climate  climate-change  global-warming  climatology  geology  boundaries 
january 2015 by tsuomela
Geotechnical Extreme Events Reconnaissance (GEER) Association
"Extreme events engineering is an experience-driven field. Immediately following the occurrence of an extreme event (e.g., earthquake, tsunami, hurricane, landslide, or flood), perishable data that can be used to advance our understanding should be systemically collected. The importance of detailed mapping and surveying of damaged areas relative to general damage surveys cannot be overemphasized, as they provide the hard data of the well-documented case histories that drive the development of many of the empirical procedures used in geoengineering practice."
science  geology  extreme  events  rapid  disaster  earth-science  geoengineering 
july 2014 by tsuomela
Welcome to the National Climate Change and Wildlife Science Center | National Climate Change and Wildlife Science Center
"The National Climate Change and Wildlife Science Center (NCCWSC) was created in 2008 as part of an ongoing mission to meet the challenges of climate change and its effects on wildlife. The earth's climate, including changes in temperature, weather patterns, and precipitation, will likely result in significant effects on our nation's fish and wildlife resources now and in the future. Relatively little scientific information exists on which to base management strategies to help fish and wildlife adapt to climate change. The U.S. Geological Survey (USGS) is meeting this challenge through the National Climate Change and Wildlife Science Center and partnerships with the Department of the Interior's Climate Science Centers (CSCs)."
government  research  data  management  geography  geology  earth-science  climate-change  environment 
september 2013 by tsuomela
Dirt : David R. Montgomery - University of California Press
"Dirt, soil, call it what you want—it's everywhere we go. It is the root of our existence, supporting our feet, our farms, our cities. This fascinating yet disquieting book finds, however, that we are running out of dirt, and it's no laughing matter. An engaging natural and cultural history of soil that sweeps from ancient civilizations to modern times, Dirt: The Erosion of Civilizations explores the compelling idea that we are—and have long been—using up Earth's soil."
book  publisher  geology  agriculture  environment 
april 2011 by tsuomela
Long-Neglected Experiment Gives New Clues to Origin of Life - ScienceNOW
Reports on reanalysis of 1950s classic Stanley Miller experiments that created amino acids in early Earth gas environments.
life  biology  exobiology  planetary  geology  paleontology  history  earth  earth-science 
march 2011 by tsuomela
Charlie's Diary: How habitable is the Earth?
So, back to the gedankenexperiment. Currently, a random meat probe dropped on the Earth's surface has something like a 15% chance of finding it survivable. But a random sampling over the historical epoch would return a survivability probability of around 1%. And over the future epoch, it's likely similar, unless we're erring massively on the side of pessimism about the prospects for our atmospheric composition remaining stable.

Ergo: to a space probe searching for somewhere that our kind of life can thrive, a truly random sampling of the Earth's surface (distributed over both time and area) would probably result in the conclusion that the planet is uninhabitable.
biology  geology  astrobiology  space  science  thought-experiment  sf  earth  history  paleontology 
october 2009 by tsuomela
On Orbit | Social Space News and Networking
On Orbit is a space social networking site create by SpaceRef Interactive Inc.. This web site was created for you the user so that you can contribute in a community environment furthering the cause of human and robotic exploration of space.
space  astronomy  news  community  geology  geophysics  social-networking  exploration  human 
september 2009 by tsuomela
Naval Oceanography Portal
The United States Naval Meteorology and Oceanography Command (NMOC) provides critical information from the ocean depths to the most distant reaches of space, meeting needs in the military, scientific, and civilian communities. 
astronomy  oceanography  geology  military  defense  government 
april 2009 by tsuomela
IPY 2007-2008
IPY = International Polar Year, concluding statement
science  international  cooperation  large  scale  polar  geology  meteorology  sts 
february 2009 by tsuomela
A scientist argues that the natural world isn't benevolent and sustaining: it's bent on self-destruction - The Boston Globe
"According to the paleontologist Peter Ward..the earth's history makes clear that, left to run its course, life isn't naturally nourishing - it's poisonous. Rather than a supple system of checks and balances, he argues, the natural world is a doomsday device careening from one cataclysm to another."
environment  ecology  earth  geology  life  biology  history  paleontology  gaia 
february 2009 by tsuomela
Open the Future: New Geoengineering Study, Part II
The article The radiative forcing potential of different climate geoengineering options is now out and available for download and discussion. As expected, it offers one of the first useful comparisons of different geoengineering techniques.
future  geology  environment  geoengineering  global-warming 
february 2009 by tsuomela
Federation of Earth Science Information Partners ? Making Data Matter
The Federation of Earth Science Information Partners is a unique consortium of more than 110 organizations that collect, interpret and develop applications for Earth observation information. Included in the ESIP network are NASA, NOAA and USGS data centers, research universities, government research laboratories, supercomputing facilities, education resource providers, information technology innovators, nonprofit organizations and commercial enterprises.
data  science  consortium  geology  meteorology  environment  remote-sensing  project(Utenn)  supercomputing  research  computational-science 
march 2007 by tsuomela
network for earthquake engineering simulation
science  scicomp  geology  simulation 
june 2006 by tsuomela
Unidata Community Portal
Portal for geodata - mostly weather and climate - and software for analzing data.
weather  software  geology  science  visualization  data-mining 
april 2005 by tsuomela
Earth As Art
Beautiful imagery of the Earth via Landsat and other satellites.
arts  science  geology 
february 2005 by tsuomela

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