{"thcode":2,"term":{"code":703,"name":"marine chemistry","parent":1298,"scope":"Branch of chemistry that deals with the properties, composition, structure, and interaction of substances in the seas and oceans."},"uf":[{"name":"chemical oceanography","usewith":false},{"name":"ocean chemistry","usewith":false},{"name":"water properties (marine)","usewith":false}],"bt":[{"code":1298,"name":"water chemistry","parent":437,"scope":"Branch of chemistry that deals with the elements and compounds in water."},{"code":437,"name":"geochemistry","parent":291,"scope":"Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth."},{"code":291,"name":"earth sciences","parent":1019,"scope":"Broad term for all science related to the study of the earth."},{"code":1019,"name":"sciences","parent":1,"scope":"Major educational fields, fields of study, and professional groupings within USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":222,"name":"CTD measurement","parent":375,"scope":"Instrumental determination of conductivity, temperature, and pressure as a function of depth to determine the salinity of seawater."},{"code":708,"name":"marine water quality","parent":1306,"scope":"Observed intrinsic characteristics of marine waters affecting their ability to support life or facilitate biological processes such as waste decomposition."},{"code":2058,"name":"ocean acidification","parent":435,"scope":"Decrease in the pH of ocean waters as a result of the increase in atmospheric carbon dioxide concentration."},{"code":810,"name":"ocean characteristics","parent":287,"scope":"The attributes and process of seas and oceans."},{"code":817,"name":"ocean salinity","parent":810,"scope":"Measure of the percentage of dissolved salts in seawater."},{"code":818,"name":"ocean sciences","parent":291,"scope":"Sciences involved in the study of geological, biological, chemical, and physical characteristics and processes of the oceans."}]}