Surface Properties

Surface Properties - Subsurface State

The characteristics of the planet's soil and surface.

Specific Measurements:


Surface skin temperature: The radiative surface skin temperature, from an IR thermometer measuring the narrowband radiating temperature of the ground surface in its field of view.

Soil surface temperature: The temperature of the soil measured near the surface.

Sea surface temperature: The temperature of sea water near the surface.

Soil characteristics: Includes available water capacity, bulk density, permeability, porosity, rock fragment classification, rock fragment volume, percent clay, percent sand, and texture classification.

Soil moisture: The moisture of the soil measured near the surface. This includes soil wetness and soil water potential.

Surface albedo:  The fraction of incoming solar radiation at a surface (i.e. land, cloud top) that is effectively reflected by that surface.

Surface condition: State of the surface, including vegetation, land use, surface type, roughness, and such; often provided in model output.

 

Surface Properties terms for the IASOA data vocabulary are taken from the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) program’s measurement vocabulary. For the full reference, please visit: http://www.arm.gov/measurements.

Surface Properties - Surface Flux

The rate of flow of energy, enthalpy, and gases near the surface.

Specific Measurements:



Atmospheric turbulence: High frequency velocity fluctuations that lead to turbulent transport of momentum, heat, mositure, and passive scalars, and often expressed in terms of variances and covariances.

CO2 flux: The rate of flow for carbon dioxide, a heavy, colorless greenhouse gas.

Latent heat flux: The time rate of flow for the specific enthalpy difference between two phases of a substance at the same temperature, typically water.

Sensible heat flux: The time rate of flow for the energy transferred from a warm or hot surface to whatever is touching it, typically air.

Soil heat flux: A quantity measured according to the formula B = λ(dT/dz), where λ is the conductivity of the soil that the heat is moving through.

Soil moisture flux: A quantity measured according to the formula B = λ(dq/dz), where λ is the conductivity of the soil that the moisture is moving through.

Soil surface temperature: The temperature of the soil measured near the surface.

 

Surface Properties terms for the IASOA data vocabulary are taken from the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) program’s measurement vocabulary. For the full reference, please visit: http://www.arm.gov/measurements.