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Related Concept Videos

Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
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Electrostatic Boundary Conditions

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Area of Science:

  • Earth System Science
  • Atmospheric Science
  • Oceanography

Background:

  • Coupled atmosphere-ocean models are crucial for understanding Earth's complex climate system.
  • Previous models often lacked sufficient resolution or interactive components for detailed process studies.

Purpose of the Study:

  • To create a high-resolution, coupled atmosphere-ocean simulation for studying weather and climate processes.
  • To provide a "nature run" dataset for Observing System Simulation Experiments (OSSEs).

Main Methods:

  • Coupled NASA Goddard Earth Observing System (GEOS) atmospheric model (7-km grid, 72 levels) with MIT general circulation model (MITgcm) ECCO ocean configuration (2-4-km grid, 90 levels).
  • Incorporated astronomical tidal forcing, interactive aerosols, and aerosol-cloud interactions.
  • Conducted a 14-month "nature" simulation.

Main Results:

  • The simulation produced a dataset with high-frequency variability and realistic ocean vertical mixing due to tidal forcing.
  • Enabled the study of coupled processes at high frequency and wavenumber.
  • Captured interactive aerosol and aerosol-cloud interactions.

Conclusions:

  • The NASA GEOS/ECCO Coupled Nature Run provides a valuable resource for climate research and OSSEs.
  • High-resolution coupled modeling with realistic forcing enhances the representation of key Earth system processes.
  • This dataset facilitates the investigation of complex, high-frequency phenomena in weather and climate.