RADIATION
FROST

Clear, cloudless, nights are conducive to a strong energy loss from the ground and differential cooling of the immediate overlaying air layers due to long-wave radiative transfer.

A surface inversion sets up, air temperature increasing with height, with colder and denser air sitting at the bottom most layers.

This stratified configuration is very stable under calm conditions, lack of breezes.

PROJECT PHASES

Temperature dataloggers at strategic locations
One month monitoring to calibrate the model

COMPUTATIONAL
FLUID DYNAMIC
MODEL

A proprietary computational fluid dynamics model is used to simulate cold air fluxes and associated temperature distribution during frost nights.

It formulates the equations of motion, thermal balance, boundary layer and turbulence closure algorithms bundled together into a state-of-the-art numerical model, comprising millions of computation cells and powered by GPU high performance computing hardware.

It is applied on the local topography, obtained from DEM (Digital Elevation Model), to capture the local MicroClimates.

FROST RISK
ASSESSMENT

The frost risk for each microclimate considers the phenology of each crop through the season.

We assess, for each week, the return period of frosts greater or equal to a given threshold in minimum temperature.

The return period is estimated based on the thermal historical record of a nearby Weather Station and is translated to the property using the correlation with the local microclimates during frost nights.

MAIN
BENEFITS

  • Define the microclimates of each orchard/vineyard/farm
  • Assess frost risk for each week during the risk period and each microclimate
  • Identify, for each microclimate, temperature increment required to reach frost-free status
  • Determine tailored passive and active frost protection measures for each microclimate
  • Define strategies for site selection of new plantings o replantings
  • Assess best planting dates for cereal crops

TAILORED
RECOMMENDATIONS
ON ACTIVE
MEASURES

 

Evaluation of SIS Systems quantity & position considering cold air drainage

 

Evaluation of Wind Machine quantity & position considering cold air drainage

 

Evaluation of sprinkler systems considering cold air drainage

 

Evaluation of heater positions considering cold air drainage

 

Identify areas to be opened to free cold air flow outside the property

 

Assess best planting dates for cereals

 

Design natural barriers to deviate cold air flow

 

Site selection for new plantings

TAILORED
RECOMMENDATIONS
ON PASSIVE
MEASURES