https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/b846063c-e218-4fc6-9866-0cdca24e9023 2019-08-14 HYPOXIA Date=2019-08-14 User Id=sritz Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=HYPOXIA [b846063c-e218-4fc6-9866-0cdca24e9023,369039] - OCEAN CHEMISTRY [6eb3919b-85ce-4988-8b78-9d0018fd8089,83433] Hypoxia in aquatic systems refers to waters where thedissolved oxygen concentration is below 2 mg/L. Most organisms avoid, orbecome physiologically stressed, in waters with oxygen below thisconcentration. Also known as a dead zone, hypoxia can also kill marineorganisms which cannot escape the low-oxygen water, affecting commercialharvests and the health of impacted ecosystems.3. Rationale: Numerous researchers are studying hypoxia, the hypoxiczone, and its effect on fisheries. It is becoming a highly visible hottopic in the Gulf of Mexico and other regions as the onset of hypoxia islargely due to increased nutrient run off from agriculture practices in theMississippi River watershed. I think there needs to be a unifying keywordto link these datasets together for users to discover hypoxia related dataacross multiple organizations and programs.