https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.8 2026-04-29T10:52:37.449Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/b632d0cc-d4b0-458e-a182-16bbd2a5ab05 DISSOLVED OXYGEN Date=2018-03-06 User Id=tstevens Entity=BroaderRelation Operation=DELETE User Note=Move Concepts System Note=delete broader relation Old Value=OXYGEN [b632d0cc-d4b0-458e-a182-16bbd2a5ab05,86205] - WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] Date=2018-03-06 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Move Concepts System Note=add broader relation New Value=OXYGEN [b632d0cc-d4b0-458e-a182-16bbd2a5ab05,86205] - GASES [7b98fcc5-4465-45c8-a647-557432276844,310625] Date=2018-03-06 User Id=tstevens Entity=Definition Operation=UPDATE Field=text System Note=update Definition Old Value=A colorless, odorless, gaseous element, constituting 21 percent of the volume of the atmsophere, and essential for aerobic forms of life. Gaseous oxygen has a chemical forumla of O2. Despite its abundance in air, the concentration of oxygen in water is usually quite low, at just a few parts per million. Nevertheless, this concentration is a good indicator of water quality. If it is too low, many organisms, including fish, will die. New Value=A colorless, odorless, gaseous element, constituting 21 percent of the volume of the atmsophere, and essential for aerobic forms of life. Gaseous oxygen has a chemical forumla of O2. Despite its abundance in air, the concentration of oxygen in water is usually quite low, at just a few parts per million. Nevertheless, this concentration is a good indicator of water quality. If it is too low, many organisms, including fish, will die. Date=2018-03-06 User Id=tstevens Entity=Definition Operation=UPDATE Field=reference System Note=update Definition Old Value=Porteous, A. 1996. Dictionary of Environmental Science and Technology. John Wiley and Sons. p. 392. Websters College Dictionary. 1991. Random House. New Value=Porteous, A. 1996. Dictionary of Environmental Science and Technology. John Wiley and Sons. p. 392. Websters College Dictionary. 1991. Random House. Date=2018-03-06 User Id=tstevens Entity=PrefLabel Operation=UPDATE Field=text System Note=update PrefLabel Old Value=OXYGEN New Value=DISSOLVED OXYGEN A colorless, odorless, gaseous element, constituting 21 percent of the volume of the atmsophere, and essential for aerobic forms of life. Gaseous oxygen has a chemical forumla of O2. Despite its abundance in air, the concentration of oxygen in water is usually quite low, at just a few parts per million. Nevertheless, this concentration is a good indicator of water quality. If it is too low, many organisms, including fish, will die. 2018-03-06 15:40:53.0