Volcano Webcams

CCTV not only infests every street, trunk road and office block, but is beginning to be trained on volcanoes.  The US Geological Survey maintains a web site that links to more than 40 Webcams pointed at active volcanoes, including St Helen’s, Fuji, Ruapehu and Etna (vulcan.wr.usgs.gov/Photo/volcano_cams.html).  So, volcanologists, make sure your sensors, hard hats and reflective suits are packed, ready to go.  You can keep an eye out for your volcano starting to blow, even as you are eating your Rice Crispies!

United States geological database

As well as organising its geographic information, including topographic maps and digital elevation data, into a seamless browseable whole (Brown, K, 2002.  Mapping the future.  Science, v. 298, p. 1874-1875), the US Geological Survey has launched a national geological database from which anyone can download a vast amount of information in 100 categories (geode.usgs.gov).

Landsat images as art

A new web site at NASA’s Goddard Space Flight Center landsat.gsfc.nasa.gove/earthasart enables you to view, download and order some of the most dramatic and aesthetically pleasing images captured by the Landsat programme.

Climate change data from satelites

Among the many regions of the electromagnetic spectrum, that spanning microwaves most easily penetrates the atmosphere.  Most people are familiar with radar images, produced by actively illuminating the Earth’s surface with microwaves.  However, the Earth also radiates microwaves, depending on surface temperature.  A great deal of information can be gleaned from this upwelling radiation, about surface temperature and at different levels in the atmosphere, rainfall, wind speed and soil moisture.  NASA, in partnership with several US universities, has launched public access to passive microwave data from the Tropical Rainfall Measuring Mission and NOAA-15 satellites at pm-esip.nsstc.nasa.gov .  Data go back 5 years, and include comparisons of daily air temperatures with the 20-year average.

Florida Department of Environmental Protection – www.dep.state.fl.us/geology/

The department’s site combines high-quality educational media and scientific data about those environmental aspects of Florida that are unique.  You can access downloadable AutoCAD *.dxf files showing geological maps from the county level to smaller scales plus other GIS files, lithological logs from boreholes and detailed information on the State’s oil and gas industry.  Currently featured on its home page is a related web site about Florida’s unique hydrogeology and its famous springs.  A well-designed, easy to use site.

New map resource for Earth scientists

Researchers at Cornell University have been compiling digital maps of a wide range of data for the last 8 years.  The Digital Earth project’s web site is http://atlas.geo.ecornell.edu .  There, it is possible not only to download various data sets for use in a GIS, and to track down primary sources for data, but also to build your own maps.  Digital Earth comprises over 100 data sets, on global, regional and North American scales, that include geographical, geological and geophysical themes.  The mapping tool takes a while to get used to, and runs slowly with a 56k connection, but should behave well with broadband access.  I tested the tools by creating a geological map of NE Africa.  This was pleasingly up to date and showed moderate detail, but the lack of a legend is something of a drawback.  Understandably, the level of stratigraphic division is limited, so that all Precambrian areas appear in the same colour.  Similar detail is not yet available for Europe, only a coarser resolution world geology data set covering it.  Downloads are in either Postscript or jpeg form, the latter suffering from artefacts generated by compression.   This is a site well worth a visit.

Universal access to peer reviewed articles?

Scientists without access to libraries that subscribe to scientific journals, or whose institutions are poorly funded, are cut off from the mainstream of research developments.  That is, unless they request offprints of papers from authors.  The growth of electronic versions of journals and increasing access to the Web, even in poor countries (Eritrea recently went “on-line”) seemed to promise wider availability of primary sources of research information.  That is an illusion.  Unless you are a subscriber to paper journals (for instance Nature and Science subscribers automatically get free access to on-line versions) or are registered with a library that has subscribed to all electronic journals made available by a publishing house, such as Elsevier’s Science Direct, then downloading more than an abstract is on a pay-per-view basis.  (Note:  even the Web of Science, that hosts the Science Citation Index database, requires a paid-for user id and password).  Being a university academic in a rich country, I have the luxury of free access to many electronic resources through the Open University Library’s subscriptions, and the same goes for any of our students.  However, the economic facts of academic life occasionally rear up.  A reference to an interesting paper in the Journal of Human Evolution came to my attention.  Using my id and password for the publisher’s web site, I was able to locate the entry for the paper.  However, we do not subscribe to that journal, and to download an Adobe Acrobat PDF file would have cost me about £35, charged to my credit card.  Instead I requested an offprint from the authors, and am still waiting for its arrival after 2 months.

Authors provide papers free of charge to publishers of journals, referees review submissions without payment, and many editors compile issues for little if any return, other than satisfaction and kudos.  Publishers of journals make enormous profits, and increase subscriptions at rates far above that of inflation (one veterinary science journal increased in price by 7 time between 1991 and this year).  The average total income received by publishers of the roughly 20 000 scientific journals for each one of the 2 million papers published each year is around US$2 000 – the trade has a US$4 billion annual income.  In the Earth sciences annual subscriptions are beyond the budgets of most 3rd World institutions (6 issues of Elsevier’s Journal of African Earth Sciences cost £1003), apart from a few (the University of Chicago’s Journal of Geology costs £79 per annum).

The Public Library of Science  – http://www.publiclibraryofscience.org -is campaigning for a way out of the increasing cost for freedom of access to scientific information.  One simple and foolproof strategy is for authors to “self-archive” their preprints and manuscripts of published papers in their institutions’ “e-print” archive in such a way that they can then all be harvested into a global virtual archive, its full contents freely searchable and accessible online by anyone.  Stevan Harnad of the University of Southampton is one of the driving forces for the self-archiving initiative, and provides full details of the possibilities at http://www.cogsci.soton.ac.uk/~harnad/Tp/nature4.htm

See also:  Harnad, S.  2001.  First Person: In the name of freedom.  New Scientist, 26 May 2001, p. 53.

Geology on the Internet

Richard Robinson of Santa Monica College, California has provided a web site bulging with links to useful resources, including virtual field excursions that cover many different aspects of geology that range from modern environments to structural geology and tectonics.

http://homepage.smc.edu/robinson_richard/geologycentral.htm