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Glacier mass balance: Cogley (2009) simple average (green). Cogley J.G. (2009): Geodetic and direct mass-balance measurements: comparison and joint analysis. Annals of Glaciology 50(50) 96-100. Values are five year averages. Data obtained from Graham Cogley [gcogley1@cogeco.ca]

Glacier mass balance: Cogley (2009) inerpolated (dark grey). Cogley J.G. (2009): Geodetic and direct mass-balance measurements: comparison and joint analysis. Annals of Glaciology 50(50) 96-100. Values are five year averages. Data obtained from Graham Cogley [gcogley1@cogeco.ca]

Glacier mass balance: WGMS (2009) all glaciers (blue) WGMS 2009: Glacier Mass Balance Bulletin No. 10 (2006-2007). W. Haeberli, I. Gartner-Roer, M. Hoelzle, F. Paul, M. Zemp (eds.), (World Glacier Monitoring Service, Zurich, Switzerland, 2010). http://www.geo.unizh.ch/wgms/gmbb.html http://www.geo.unizh.ch/wgms/mbb/sum08.html Data obtained from Mauri Pelto, Nichols College

Glacier mass balance: WGMS (2009) reference set of 30 glaciers (red) WGMS 2009: Glacier Mass Balance Bulletin No. 10 (2006-2007). W. Haeberli, I. Gartner-Roer, M. Hoelzle, F. Paul, M. Zemp (eds.), (World Glacier Monitoring Service, Zurich, Switzerland, 2010). http://www.geo.unizh.ch/wgms/gmbb.html http://www.geo.unizh.ch/wgms/mbb/sum08.html Data obtained from Mauri Pelto, Nichols College
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Note: For each dataset, one value is plotted for each year in the period of record. For datasets with multiple values in one year, an average is calculated for one annual value. Missing annual values are interpolated between non-missing values.
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