"Human Dimensions"@en . "Land Surface"@en . "Agriculture"@en . "Paleoclimate"@en . "Biosphere"@en . "Spectral/Engineering"@en . "Cryosphere"@en . "Hydrosphere"@en . . "Topic level terms from the Science Keywords from Olsen L.M. et. al (2006) NASA/GCMD Earth Science Keywords Version 5.3.3." . . . . . . . . . . . . . . "Global Change Master Directory Science Keyword topics" . "Oceans"@en . "Atmosphere"@en . "Solid Earth"@en . "Climate Indicators"@en . "Sun-earth Interactions"@en .