https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf draft 2025-07-25 https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/projects/b08576d5-6253-47de-a1b3-562808f3282f ACTIVATE Date=2020-02-10 User Id=tstevens Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: NASA’s Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) project is a five-year project (January 2019 – December 2023) that will provide important globally-relevant data about changes in marine boundary layer cloud systems, atmospheric aerosols and multiple feedbacks that warm or cool the climate. Marine boundary layer clouds play a critical role in Earth’s energy balance and water cycle. ACTIVATE will study the atmosphere over the western North Atlantic Ocean and sample its broad range of aerosol, cloud and meteorological conditions using two aircraft based at NASA’s Langley Research Center. As an integral part of ACTIVATE, a suite of modeling tools and analysis techniques will be employed to inform preflight planning, perform data analysis, and climate model uncertainty quantification and improvement. language code: en Date=2020-02-10 User Id=tstevens Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment language code: en Date=2020-02-10 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=ACTIVATE [b08576d5-6253-47de-a1b3-562808f3282f,559815] - A - C [0c89f3f4-7ab1-43ce-89ee-795d35f0e30a,546613] Date=2026-02-05 User Id=tstevens User Note=updated definition NASA’s Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) project was a five-year project that provided important globally relevant data about changes in marine boundary layer cloud systems, atmospheric aerosols and multiple feedbacks that warm or cool the climate. Marine boundary layer clouds play a critical role in Earth’s energy balance and water cycle. ACTIVATE studied the atmospheric over the western North Atlantic Ocean and sample its broad range of aerosol, cloud and meteorological conditions using two aircraft based at NASA’s Langley Research Center. As an integral part of ACTIVATE, a suite of modeling tools and analysis techniques were employed to inform preflight planning perform data analyses, and climate model uncertainty quantification and improvement. 2026-02-05T13:17:40.319Z