RIFTS
type: Concept

ICE SHEET MEASUREMENTS
type: Concept
in scheme: sciencekeywords
change note: 2017-03-15 13:10:43.0 [mgenazzi] Definition added insert Definition (id: null text: Scientists have adopted three general approaches to ice sheet mass balance measurement: comparing outflow and melt to snowfall accumulation (the mass budget method), observing changes in glacier elevation (volume change or geodetic method), and detecting changes in the Earth’s gravity field over the ice sheet (gravimetric method). language code: en);
change note: 2015-12-10 17:15:47.0 [aaleman] Insert Concept add narrower relation (ICE SHEET MEASUREMENTS [6d6a2b61-5d2c-4ec1-a164-34000f481588,158557] - RIFTS [8a8fa93e-6424-46dd-ae97-d8afbac41b89,158561]);
change note: 2015-12-10 17:15:20.0 [aaleman] Insert Concept add broader relation (ICE SHEET MEASUREMENTS [6d6a2b61-5d2c-4ec1-a164-34000f481588,158557] - ICE SHEETS [10b1872b-4a48-4360-a449-388e8988bca9,84415]);
definition: Scientists have adopted three general approaches to ice sheet mass balance measurement: comparing outflow and melt to snowfall accumulation (the mass budget method), observing changes in glacier elevation (volume change or geodetic method), and detecting changes in the Earth’s gravity field over the ice sheet (gravimetric method).

ICE SHEETS
type: Concept