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Geophysicists combine forces

Nature volume 447, page 1037 (28 June 2007) | Download Citation


Fresh drive to get data online for all.

An ambitious programme aimed at freeing up Earth-science data for researchers and educators worldwide will be launched next week at the quadrennial meeting of the International Union of Geodesy and Geophysics in Perugia, Italy. It is one of several efforts by geoscientists to improve access to geophysical data on the web.

Force field: Earth's magnetosphere could shed light on magnetic storms. Image: NASA/SPL

Called the Electronic Geophysical Year (eGY), the programme has been organized by a broad range of researchers and organizations and will promote the creation of virtual observatories to make geophysical data easier to find and use. It takes its inspiration from the fiftieth anniversary of the 1957 International Geophysical Year, which was the first concerted effort to understand the Earth as a physical system.

Sharing and transferring data is much easier than it was during the original International Geophysical Year. But because different research groups often have data stored in incompatible formats, researchers can't always combine the various sources for study. Efforts to transfer historical data languishing in archives from deteriorating paper to accessible digital formats are piecemeal and require prioritization.

One of eGY's goals is to overcome such hurdles, in part through the use of virtual observatories that will serve as clearinghouses for scientific collections. “This is the forefront of information technology: to standardize computer-language syntax,” says William Peterson, a physicist at the University of Colorado in Boulder and an eGY organizer. “We hope to build layers of software so anyone can display and integrate data in different forms.” On 12–15 June, around 75 researchers from around the world attended the Virtual Observatories in Geosciences conference in Denver, Colorado, to plot this course.

A case in point, says Jeffrey Love, a geomagnetist at the US Geological Survey office in Denver, are records of Earth's magnetic field that extend back to the nineteenth century. Decades-old data originally gathered to help marine navigation at labs in Maryland, Hawaii and Alaska are now of interest to scientists studying magnetic storms in Earth's magnetosphere that occur as a result of solar activity. “It is a daunting task,” says Love, “making sure people know what they have and should save.”

Other international efforts are aimed at collecting new data. One part of the current International Heliophysical Year is a concerted effort to extend low-cost data-collection systems to developing nations. In Africa, for instance, 35 nations have agreed to the installation of special Global Positioning System pods. These use the signals from navigation satellites to measure electron density in the ionosphere (where the atmosphere meets space). Such monitoring is widespread in the United States, Europe and Latin America, but data for Africa are weak, says Joseph Davila, a physicist at NASA's Goddard Space Flight Center in Greenbelt, Maryland, who is leading the effort. Last week, Davila was in Libya helping to install a radio receiver at the University of Sheba, south of Tripoli, as part of AWESOME (Atmospheric Weather Electromagnetic System for Observation, Modeling and Education), another ionospheric monitoring project.

In 2008, the United Nations-sponsored Year of Planet Earth will be looking at similar efforts to further its goal of promoting “Earth Sciences for Society”. Eduardo de Mulder of the Geological Survey of the Netherlands in Utrecht, a leader on the Planet Earth project, says the organization is trying to raise at least US$5 million to fund international efforts that would include 60 nations. Scientists are applying for grants from this pool of funds, with the first awards expected late this year.

Among the project's main efforts will be an annotated geological map of the world,, that would provide access to all sorts of data. “It would be a living process,” says de Mulder, “with the public and governments using the Earth science information to make better policy decisions.”

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