What is the average soil temperature in Victoria Australia at 1m, 2m, 3m depth for winter and summer?

Question

What is the average soil temperature in Victoria Australia at 1m, 2m, 3m depth for winter and summer?

Answer 1

68 F

Answer 2

i don't know sorry i wish i knew the answer if i did i would tell you but i don't know the answer so i can't tell I'm afraid

Answer 3

This is quite a difficult question to answer.    There's been very little soil research done measuring temperatures below one metre in Victoria.  

Just to point you in the right direction, here's what I know about it.  

The soil temperature measured at one metre will be influenced more by the atmospheric temperature and water vapour than would those values measured at two and three metres irrespective of whether it's summer or winter.

The Bureau of Meteorology measure temperatures down to one metre.  

Check out the link below and look at the far right column:

http://www.bom.gov.au/products/IDV65176....

The temperature of the soil is determined by whether the soil is clay, sand (wet and dry), rock etc... so it's near impossible to give you average soil temps across all of Victoria due to varying soil types.  I suspect you already know this.  

Each day, particularly in summer, the sun's rays cause a temperature wave to permeate to varying depths in the soil.  If the surface is rock, the temperature wave will reach down to one metre if it's a hot summers day.  Wet sand allows the temp wave to reach close to 80cm whereas dry sand only to about 25cm.

However, over the course of a whole year, rocky ground will allow the temp wave to penetrate down to around 20 metres, wet sand (~

14 metres) and dry sand, close to 5 metres.

There's minimal fluctuation in diurnal soil temp beyond one metre in depth since the temperature can't penetrate any deeper.  So, both the summer and winter temperatures at the two and three metres will be within a couple of degrees of each other.  I know that this doesn't answer your question :(

Try and contact the CSIRO, they may be able to help you.