# Concept

## Downwelling 2-pi scalar irradiance as energy standard deviation of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer

URI | http://vocab.nerc.ac.uk/collection/P01/current/DWPARSTD/ |
---|---|

Within Vocab | BODC Parameter Usage Vocabulary |

Preferred Label | Downwelling 2-pi scalar irradiance as energy standard deviation of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer |

Definition | The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement. |

Broader |
P02:
Visible waveband radiance and irradiance measurements in the water columnS06:
Downwelling 2-pi scalar irradiance as energyS26:
water bodyS29:
electromagnetic radiation (PAR wavelengths) |

Related |
P06:
Watts per square metreS02:
in theS04:
2-pi scalar radiometerS07:
standard deviation |

Note | accepted |

Deprecated | false |

Alternative Label | SD_DW_Par |

Version | 5 |

Has Current Version | http://vocab.nerc.ac.uk/collection/P01/current/DWPARSTD/5/ |

Authored On | 2019-06-04 17:32:45 |

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