GROWING DEGREE DAY - GRAPH

otorongo
Posts: 1428
Joined: Tue Jan 10, 2012 5:12 pm
Location: sub-subtropical London

Re: GROWING DEGREE DAY - GRAPH

Post by otorongo » Tue Jan 24, 2012 10:25 am

Central London is almost 2 degrees warmer (24hr average) than Greenwich.
I wonder how many GDDs that would be?

It's good to see parts of England better than parts of Australia and NZ, but you've chosen some of the coldest for your chart. Hobart is in the very south of Tasmania.
How would that compare to tropical locations like Darwin? :wink:


otorongo
Posts: 1428
Joined: Tue Jan 10, 2012 5:12 pm
Location: sub-subtropical London

Re: GROWING DEGREE DAY - GRAPH

Post by otorongo » Tue Jan 24, 2012 4:40 pm

Found a calculator:
http://www.degreedays.net/#generate
(you have to select 'cooling degree days' and base 12C)

For the Cricklewood station (which is a bit cooler than my location), it works out to 1077.

For a comparison:
Malaga airport - 2612
Tenerife Sur - 3340
Manaus, Brazil - 5543


Rod
Posts: 351
Joined: Sat Jun 25, 2011 8:42 am
Location: Christchurch NZ

Re: GROWING DEGREE DAY - GRAPH

Post by Rod » Wed Jan 25, 2012 9:48 am

otorongo wrote:Central London is almost 2 degrees warmer (24hr average) than Greenwich.
I wonder how many GDDs that would be?

It's good to see parts of England better than parts of Australia and NZ, but you've chosen some of the coldest for your chart. Hobart is in the very south of Tasmania.
How would that compare to tropical locations like Darwin? :wink:
Is there any temp data for central london anywhere ? - It would be good to see the GDD's for this.

I chose Hobart as a comparison to the UK, because of the fact that it is one of the coolest parts of Australia ( many palm species can be grown there ) so that you could compare to parts of the UK.

I just worked out the GDD's for Manaus Brazil like you did. But i did it manually to see if that calculator was accurate: I got ~ 5606 GDD's
Latitude; 43°,31'S
Hottest Month; 23.0°c / 12.0°c
Coldest Month; 11.0°c / 2.0°c
Mean Sunshine; 2144 hrs
Mean Rainfall; 618 mm


otorongo
Posts: 1428
Joined: Tue Jan 10, 2012 5:12 pm
Location: sub-subtropical London

Re: GROWING DEGREE DAY - GRAPH

Post by otorongo » Wed Jan 25, 2012 12:37 pm

The calculator uses data from the last 5 years, or whatever you select from the dropdown. Our results are pretty close, so I'll trust it :)
Rod wrote:I chose Hobart as a comparison to the UK, because of the fact that it is one of the coolest parts of Australia ( many palm species can be grown there ) so that you could compare to parts of the UK.
Sure, I was just curious how far from the tropical ideal we are.


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