## title: Indicators at hourly timescale description: List of available indicators at hourly timescale keywords: indicator, agroclimatic, ecoclimatic date: 2024-09-20

These are the indicators of the Indicators library (version 2.1.0).

## 48 hourly indicators

Id | Name | Description | Variables | Parameters | Unit [^1] | Notes |
---|---|---|---|---|---|---|

Cold Frost | ||||||

coldhours | Cold hours | Number of cold hours (TH < -4.0 °C). | th | h | ||

vcoldhours | Very cold hours | Number of very cold hours (TH < -10.0 °C). | th | h | ||

coldfreq | Cold hours freq | Frequency (%) of cold hours (TH < -4.0 °C). | th | % | ||

vcoldfreq | Very cold hours freq | Frequency (%) of very cold hours (TH < -10.0 °C). | th | % | ||

maxfrosthours | Consecutive frost hours | Maximal number of consecutives frost hours (TH < 0.0 °C). | th | h | ||

sumfrosthours | Frost sum | Sum of negative temperatures (TH < 0.0 °C). | th | °C | ||

froststart | Frost start | Date and time of first frost (Julian day). | th | d | ||

frostend | Frost end | Date and time of last frost (Julian day). | th | d | ||

frosthours | Frost hours | Number of frost hours (TH < 0 °C). | th | h | ||

vernhours | Vernalisation hours | Number of hours when {tMinVern} °C < TH < {tMaxVern} °C. | th | tMaxVern, tMinVern | h | |

Heat | ||||||

hshours | Heat stress hours | Number of heat stress hours (TH > {Theat} °C). | th | Theat | h | |

hsfreq | Heat stress hours frequency | Frequency of heat stress hours (TH > {Theat} °C). | th | Theat | % | |

maxheathours | Max consecutive heat hours | Maximal number of consecutives shock hours (TH > {Theat} °C). | th | Theat | h | |

sumheathours | Heat sum temperature | Sum of hourly temperatures (TH > {Theat} °C). | th | Theat | °C | |

heatstart | Heat start | Day and hour of first Heat shock (TH > {Theat} °C) in julian day. | th | Theat | d | |

heatend | Heat end | Day and hour of last Heat shock (TH > {Theat} °C) in julian day. | th | Theat | d | |

Thermal conditions | ||||||

mintmin | Minimal hourly min temp | Minimal Tmin for each period. | tmin | °C | ||

mintmax | Minimal hourly max temp | Minimal Tmax for each period. | tmax | °C | ||

maxtmin | Maximal hourly min temp | Maximal Tmin for each period. | tmin | °C | ||

maxtmax | Maximal hourly max temp | Maximal Tmax for each period. | tmax | °C | ||

avgth | Average hourly temperature | Average hourly temperature for each period. | th | °C | ||

Humidity conditions | ||||||

wethours | Wet hours | Number of wet hours (RH / 100 > 60%). | rh | h | ||

dryhours | Dry hours | Number of dry hours (RH / 100 < 40%). | rh | h | ||

wetfreq | Wet hours freq | Frequency (%) of wet hours (RH / 100 > 60%). | rh | % | ||

dryfreq | Dry hours freq | Frequency (%) of dry hours (RH / 100 < 40%). | rh | % | ||

maxwethours | Consecutive wet hours | Maximal number of consecutives wet hours (RH / 100 > 60%). | rh | h | ||

maxdryhours | Consecutive dry hours | Maximal number of consecutives dry hours (RH / 100 < 40%). | rh | h | ||

Water deficit | ||||||

maxrain | Maximal hourly rain | Maximal hourly rain fall. | rain | mm | ||

minetp | Minimal hourly ETP | Minimal hourly potential evapotranspiration (mm). | etp | mm | ||

maxetp | Maximal hourly ETP | Maximal hourly potential evapotranspiration (mm). | etp | mm | ||

Water damage | ||||||

raihours | Rainy hours | Number of rainy hours. | rain | h | ||

raifreq | Rainy hours freq | Frequency (%) of rainy hours. | rain | % | ||

noraihours | No Rainy hours | Number of no rainy hours. | rain | h | ||

noraifreq | No rainy hours freq | Frequency (%) of no rainy hours. | rain | h | ||

hraihours | Heavy rainy hours | Number of heavy rainy hours (> {heavyRain} mm). | rain | heavyRain | h | |

hraifreq | Heavy rainy hours freq | Frequency (%) of heavy rainy hours (> {heavyRain} mm). | rain | heavyRain | % | |

shraihours | Severe heavy rainy hours | Number of severe heavy rainy hours (> {seriousHeavyRain} mm). | rain | seriousHeavyRain | h | |

shraifreq | Severe heavy rainy hours freq | Frequency (%) of severe heavy rainy hours (> {seriousHeavyRain} mm). | rain | seriousHeavyRain | % | |

Radiation deficit | ||||||

avsorad | Average hourly solar radiation | Average hourly radiation (MJ/m²). | radiation | MJ/m² | ||

minrad | Minimal hourly solar radiation | Minimal hourly radiation (MJ/m²). | radiation | MJ/m² | ||

maxrad | Maximal hourly solar radiation | Maximal hourly radiation (MJ/m²). | radiation | MJ/m² | ||

Wind conditions | ||||||

hwindhours | High wind hours | Number of hours with high wind (wind speed at 10m > 5.28 m/s). | wind | h | ||

minwind | Minimal daily wind speed | Minimal hourly wind speed. | wind | m/s | ||

maxwind | Maximal hourly wind speed | Maximal hourly wind speed. | wind | m/s | ||

Other complex indicators | ||||||

avgthi_idele | THI: Temperature Humidity Index | Average heat stress indicator THI (Temperature Humidity Index). | rh, th | °C² | 978-2-7148-0083-1 | |

thihours_idele | THI hours | Number of hours with THI according to stress. Light stress: 68 - 72%; moderate stress: 72 - 78%; severe stress: 78 - 84%; extreme stress: > 84%. | rh, th | h | 978-2-7148-0083-1 | |

maxthihours_idele | Consecutive light stress THI hours | Maximal number of consecutives hours with THI according to stress. Light stress: 68 - 72%; moderate stress: 72 - 78%; severe stress: 78 - 84%; extreme stress: > 84%. | rh, th | h | 978-2-7148-0083-1 | |

thifreq_idele | Light stress THI hours freq | Frequency (%) of THI light according to stress. Light stress: 68 - 72%; moderate stress: 72 - 78%; severe stress: 78 - 84%; extreme stress: > 84%. | rh, th | % | 978-2-7148-0083-1 |

### Parameters

Id | Description |
---|---|

heavyRain | Daily pluviometry specifying an heavy rain (mm). |

seriousHeavyRain | Daily pluviometry specifying a serious heavy rain (mm). |

Theat | Temperature above which heat affects the crop (°C) (compared to Tmax). |

tMaxVern | Maximal temperature for vernalisation (°C). |

tMinVern | Minimal temperature for vernalisation (°C). |

### Variables

Id | Description |
---|---|

etp | Evapotranspiration [mm/d]. |

radiation | Global radiation [W/m²]. |

rain | Rain precipitation [mm]. |

rh | Relative humidity [%]. |

th | Instantaneous hourly air temperature [°C]. |

tmax | Maximal air temperature [°C]. |

tmin | Minimal air temperature [°C]. |

wind | Wind speed [m/s]. |

### Notes

Reference | Description |
---|---|

978-2-7148-0083-1 | La ventilation des bâtiments d'élevage de ruminants, Institut de l'élevage |

[^1]: Unit expressed for calculations based on climatic variables defined in standard units.