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	   gmd:Hierarchy_Level_Name:  Methane Concentration and Chronology from the WAIS Divide Ice Core (WDC05A)
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	               gmd:title:  Methane Concentration and Chronology from the WAIS Divide Ice Core (WDC05A)
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	                     gmd:date:  2011
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	                  gmd:Date:  2011-05-27
	               gmd:identifier:  NSIDC-0493
	               gmd:identifier:  http://dx.doi.org/10.7265/N5319SV3
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	         gmd:Abstract:  
	
	            This data set provides a high-precision and high-resolution record of 
	            atmospheric methane from the West Antarctic Ice Sheet (WAIS) Divide ice core 
	            WDC05A, spanning the years 1000 to 1800 C.E. The data include methane (CH4) 
	            concentration measurements and ice age chronology. Methane concentration data 
	            include mean sample depth, gas age, mean concentration, and concentrations 
	            from individual measurements, at a temporal resolution of approximately nine 
	            years. Ice chronology data include depth and ice age.

Data are available via 
	            FTP, in Microsoft Excel (.xlsx) format.
	         gmd:Purpose:  Scientific Research
	         gmd:Credit:  Mitchell, L. E., E. J. Brook, T. Sowers, J. R. McConnell, and K. Taylor. 2011. Methane Concentration and Chronology from the WAIS Divide Ice Core (WDC05A). [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center. http://dx.doi.org/10.7265/N5319SV3. 
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