.. _glossary: Glossary ========== +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | Symbol | Definition | Unit | +===============================================================+===============================================================================================+====================+ | D | Turbine rotor diameter (fixed parameter) | m | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | t | Time | s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | x, y, z | Coordinates (east-west, north-south, vertical) | m | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | n\ :sub:`t`\, n\ :sub:`x`\, n\ :sub:`y`\, n\ :sub:`z`\ | Number points in time and space dimensions | - | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | u | Wind vector component along East - West, positive going from West to East | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | v | Wind vector component along North - South, positive going from South to North | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | w | Wind vector component along vertical, positive going up | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | U | Magnitude of horizontal wind speed vector | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | WS | Magnitude of 3D wind speed vector | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | u\ :sub:`LOS`\ | Wind vector component along the line of sight of each lidar beam | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | WD | Direction of horizontal wind speed vector | deg | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | :math:`{\Delta}` WD | Veer computed at fixed (x,y) from two distinct z points | deg | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | TI | Turbulence intensity (from horizontal wind speed) | % | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | TKE | Turbulence kinetic energy (from 3-D wind speed) | m²/s² | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | L | Obukhov length | m | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | u\ :sub:`*`\ | Friction velocity | m/s | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | z\ :sub:`0`\ | Roughness length | m | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | z\ :sub:`i`\ | Atmospheric boundary layer height | m | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | T | Absolute temperature | K | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | T\ :sub:`s`\ | Sonic temperature | K | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | F\ :sub:`s`\ | Sensible heat flux | W/m² | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | CNR | Carrier-to-noise ratio | db | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | :math:`\overline{q}` | Temporal average of variable q | unit of q | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | | Ensemble average of variable q | unit of q | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | q' | Temporal perturbation of variable q, defined as - q | unit of q | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | q\ :sub:`hub`\ | Variable q evaluated at hub height | unit of q | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | :math:`{\sigma}`\ :sub:`q`\ | Standard deviation of variable q | unit of q | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+ | P | Generator power | W | +---------------------------------------------------------------+-----------------------------------------------------------------------------------------------+--------------------+