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Climate overview

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The climate tab shows the climate details for each block and is the place to add snowfall.

NIWA climate data

Using a NIWA climate dataset, OverseerFM uses monthly temperature, PET, rainfall and sunshine hours in 500 square metre grids across New Zealand. This data represents an average taking into account the different weather conditions over 30 years (1991-2020).

Using a long-term climate makes it possible to compare the effect of changes in farm management rather than reflecting changes in the weather each year. This then allows comparisons with potential future management practices to inform farm planning.

NIWA makes no representations or warranties regarding the accuracy, completeness or fitness for the purpose of the data used. Any reliance on or other use of the data by a third party is entirely at the third party’s own risk. NIWA accepts no liability for any loss or damage, whether direct or indirect, consequential or otherwise arising from the reliance on or use of the data.


OverseerFM climate

Each block is assigned monthly climate data based on its location if it has been drawn. If the climate override location is set, this is used instead. If the block has no location, the farm’s location is used. All farms must define a location.

Each block’s monthly climate is summarised to an annual value that is displayed under the climate tab - there is no ability to enter or edit a blocks climate manually. 


Snowfall

If snowfall occurs on the farm, you can enter it on the climate tab. Snowfall can only be entered on pastoral blocks. OverseerFM assumes that all snow melts in the month that it falls, and that snow/ice cover does not affect runoff from subsequent rainfall events.

Snowfall can be applied to multiple blocks that have the same snowfall depth and type (ie light, average or heavy). If there is a difference in snowfall for some blocks you will need to enter those separately by adding another snowfall event by selecting the add snowfall button.

When snowfall is deleted at the block level on the climate screen, all blocks that were within the snowfall event will also have their snowfall deleted.

 

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