Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
London Heathrow is close, the annual extreme minimum for the past 30 years averages -5.4C. Central London would easily qualify as subtropical though as it only gets 10 frost days per year, and rarely gets below even -2 or -3 in a typical year.
London Heathrow is close, the annual extreme minimum for the past 30 years averages -5.4C. Central London would easily qualify as subtropical though as it only gets 10 frost days per year, and rarely gets below even -2 or -3 in a typical year.
Then it is ok to say Central London is subtropical, I suppose. Many subtropical plants can grow there.
However it does not make a lot of sense to talk about small islands created by urbanization.
The frost-free period length might not qualify. I don't have data. In Shanghai the period is about 240 days, from the end of March to early December.
Note in a clear night, frost may occur with 3 C or lower temperature. (I understand London is usually very cloudy though.)
Then it is ok to say Central London is subtropical, I suppose. Many subtropical plants can grow there.
However it does not make a lot of sense to talk about small islands created by urbanization.
The frost-free period length might not qualify. I don't have data. In Shanghai the period is about 240 days, from the end of March to early December.
Note in a clear night, frost may occur with 3 C or lower temperature. (I understand London is usually very cloudy though.)
Central London gets about 10 frost days per year, while Heathrow gets 25-30 days (almost all between Dec-early Mar). London gets about 250 fewer sun hours than Shanghai.
London Heathrow is close, the annual extreme minimum for the past 30 years averages -5.4C. Central London would easily qualify as subtropical though as it only gets 10 frost days per year, and rarely gets below even -2 or -3 in a typical year.
Where did you get this data? Either way it still doesn't matter London is not Subtropical, I feel like other factors like daylight hours have to be taken into consideration. Also perhaps sea temperatures- I mean seriously, nowhere in the subtropics gets 6c sea temperatures.
Where did you get this data? Either way it still doesn't matter London is not Subtropical, I feel like other factors like daylight hours have to be taken into consideration. Also perhaps sea temperatures- I mean seriously, nowhere in the subtropics gets 6c sea temperatures.
Under the definition I use (namely Koeppen's), no part of London is subtropical, since as far as I know no part of London has summer daily mean temperatures of 22C or hotter. Parts of London have very mild winters with the heat island effects, but mild winters alone doesn't make a place subtropical.
Under the definition I use (namely Koeppen's), no part of London is subtropical, since as far as I know no part of London has summer daily mean temperatures of 22C or hotter. Parts of London have very mild winters with the heat island effects, but mild winters alone doesn't make a place subtropical.
The problem is that places with high altitude may not have 22C summer temperature but still look like subtropical over all.
For example, Kunming China only has 19.X C in July, but it looks like a subtropical city.
The problem is that places with high altitude may not have 22C summer temperature but still look like subtropical over all.
For example, Kunming China only has 19.X C in July, but it looks like a subtropical city.
That is the way I see it as well. Subtropical (imho) isn't a climate type , more of a climate quality- namely, being able to show a closer connection to the vegetation of tropical zones.
Last edited by Joe90; 09-28-2012 at 09:57 PM..
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.
Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
