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| Controlled block failure of ice wedge polygons on the Beaufort Sea coast. (Photograph by S. Solomon, courtesy Arctic Coastal Dynamics) |
DADDI is a NASA supported project to improve the availability of Arctic coastal data. Our goal is to develop a system that can be readily extended to support the International Polar Year (IPY).
DADDI is a collaborative project between NSIDC, the Oak Ridge National Laboratory Distributed Active Archive Center for Biogeochemical Dynamics (ORNL DAAC), the Socioeconomic Data and Applications Center (SEDAC) at Columbia University, and the Canadian Cryospheric Information Network (CCIN). We are also collaborating with the International Permafrost Association's Arctic Coastal Dynamics (ACD) project and the interagency Study of Environmental Arctic Change (SEARCH).
The project has two phases. The first phase will focus on identification, acquisition, and description of data to facilitate discovery and will build off ORNL's Mercury toolset for metadata harvesting, indexing, and searching. The second phase will focus on the advertisement, visualization, and delivery of the data in a manner that facilitates analysis.
As part of the first phase we conducted a small user workshop in November 2006 to develop use cases and specific requirements for the system. An initial data access system will be available summer 2007. We are also working with the Global Change Master Directory (GCMD) to establish a metadadata registration sysytem for IPY data. This system builds off the IPY Metadata Profile developed as part of the DADDI project under the auspices of the IPY Data Policy and Management SubCommittee.
Contact Mark Parsons for any questions about DADDI.
For information about NSIDC's role in IPY activities, visit the IPY@NSIDC Web site. DADDI is also working closely with the IPY Data and Information Service to help ensure proper data stewardship.
DADDI helps address the issues of understanding Arctic coastal dynamics and the impacts of climate changes on Arctic coastal environments. The Arctic continental shelves comprise 30 percent of the area of the Arctic Ocean and about 20 percent of the world's continental shelf area (Brown and Solomon 1999). The coastal zone of the Arctic Ocean is undergoing major changes in the land, ocean, cryosphere, and biosphere, including increased coastal erosion, sea level rise, flooding of marshes and coastal plains, and release of methane from the coastal shelves (Shakhova et al. 2005). Yet it is a highly variable region. Some parts of the coast are stable and some are very dynamic. (ACIA 2004, Atkinson 2004, Rachold and Cherkasov 2004) It is also the area of the most concentrated human activity at high latitudes. It is important to understand the nature of these changes and variability and their impacts on societies, so coastal resource mangers can better plan necessary port facilities and other infrastructure and respond to coastal erosion, flooding, increasingly stormy seas, and other issues. There is also a need to assess impacts on global carbon budgets since continental margins are the most important locations in the ocean for sequestering organic carbon (Romankevich 1984; Smith and Hollibaugh 1993). To address these issues, researchers need better access to distributed and diverse data sources in an integrated fashion. There is especially a need to synthesize the relevant data across the circum-Arctic region. The figure below shows an overview of major Arctic coastal processes. These processes need to be better understood, especially in the context of their relationship to human society.
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| Coastal dynamics are a function of environmental forcing, coastal morphology, and onshore and offshore permafrost characteristics. (Courtesy Arctic Coastal Dynamics) |
ACIA (Arctic Climate Impact Assessment). 2004. Impacts of a Warming Arctic: Arctic Climate Impact Assessment. Cambridge University Press.
Atkinson, D. 2004. Circum-Arctic coastal storminess statistics derived from observational wind data. Berichte Polar- und Meeresforschung 482: 186-95.
Brown, J. and Solomon, S. eds. 1999. Arctic Coastal Dynamics: Report of an international workshop, 2-4 November 1999. Geological Survey of Canada Open File 3929.
Rachold, V. and Cherkasov, G. (eds). 2004. Arctic coastal dynamics. Report of the 4th International Workshop. Berichte Polar- und Meeresforschung 482: 229
Romankevich, E.A. 1984. Geochemistry of Organic Matter in the Ocean. Springer-Verlag, 334 pp.
Shakhova, N., Semilitov, I., and Panteleev, G. 2005. The distribution of methane on the Siberian Arctic shelves. Geophysical Research Letters 32, L09601.
Smith, S.V. and J.T. Hollibaugh. 1993. Coastal metabolism and the oceanic organic carbon balance. Revs. Geophys. 31: 75-89.
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Supporting Cryospheric Research Since 1976 |
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