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Post by Babu on Jan 30, 2018 9:43:45 GMT -5
According to Köppen, climates with wet summers need more rainfall to stay lush compared to climates with dry summers. However, in my opinion, Beijing with less than 600mm of precipitation looks way lusher than any mediterranean place, even when compared to pretty wet ones like Porto for example. Intuitively, I'd say, and this applies especially to places with cold winters, that if you had only say 500mm of precipitation and could decide when to use it to water the landscapes, you would use much less of it in the cold season when plants go into hibernation or the water freezes, than in the warm growing season where the plants dry out easier. Dumping all of it in the winter seems like it would be pointless, that the plants wouldn't be able to use that much water anyway. And, Broome for example is classifies as semi-arid and looks like this:  Whereas non-arid medirerranean Portugal looks like this:  |
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Post by P London on Jan 30, 2018 10:15:11 GMT -5
Mediterranean climates have very high sunshine totals (more evaporation) and higher temperatures than places with wet summers. So I'm guessing it would be the other way round... Places with dry (hot) summers (like Med climates) would need more precipitation to stay lush.. Hmmm
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Post by alex992 on Jan 30, 2018 10:24:50 GMT -5
Huh? I've never heard that before....might ring true however since a lot of climate with relatively dry summers are higher latitude climates with cooler summers and a less intense sun = less evapotranspiration, while climates with monsoonal summers or summers influenced by the ITCZ (Intertropical Convergence Zone) tend to be lower latitude climates with an intense summer sun and hot temperatures, such as Miami.
Also might ring true as well with native vegetation's adaptations. 600 mm of rain in Phoenix might look lusher (relative to what it normally looks like) than 600 mm of rain in Atlanta, for example.
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Post by Donar on Jan 30, 2018 10:26:54 GMT -5
I think the idea was that in mediterranean climates plants can grow in a cool wet season and go dormant during the hot dry season whereas in summer rainfall climates it's either hot or dry and therefore harder for plants to grow.
Anyway, it makes only sense to compare places with a similar mean temperatures and I don't think that Portugal pic proves anything lol.
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Post by Deleted on Jan 30, 2018 10:39:41 GMT -5
That Portugal pic just shows what anywhere would look like where there is no soil. It looks like it goes straight to the bedrock. Look at pics of Dungeness (an oceanic climate) and you will see a similar lack of plants.  |
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Post by nei on Jan 30, 2018 12:21:47 GMT -5
I think the idea is that much of warm season rain gets lost to evaporation before it can soak into the soil. Cool season rain soaks into the soil and doesn't evaporate much. Plants with deep roots can rely on moisture deeper down or store water, so a tree adapted to long dry periods would have moisture to tap into in a Mediterranean climate than a similar temperature wet summer / dry winter climate. Usually those climates have very different temperatures patterns so hard to make a fair comparison. Here's a map of evapotranspiration [amount of water evaporated back to the atmosphere] www.arcgis.com/apps/OnePane/main/index.html?appid=b1a0c03f04994a36b93271b0c39e6c0fI'd guess this would work more for deciding where trees can and can't grow. Rather than grasses, which will just go dormant during dry periods and not loo lush |
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Post by Palider on Feb 2, 2018 23:36:13 GMT -5
According to Köppen, climates with wet summers need more rainfall to stay lush compared to climates with dry summers. Does Köppen really say that? |
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Post by Babu on Feb 3, 2018 3:03:44 GMT -5
According to Köppen, climates with wet summers need more rainfall to stay lush compared to climates with dry summers. Does Köppen really say that? If 70% of the precipitation falls during the high sun half-year, you add 280mm to the semi-arid threshold. |
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Post by grega94 on Feb 3, 2018 4:26:26 GMT -5
A good example would be Borzya It's borderline Bsk11.485 in of rain but the majority falls in the summer, and the winters are long and cold. But looks like this in the summer. But looks like this in the summer. 1 2But then there are places like the Hanford Site that gets 6.14 in of rain, with most of it falling in winter, but it still looks like a grassland/prairie. 3 4 |
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Post by knot on Feb 3, 2018 5:02:42 GMT -5
Broome is less arid than Portugal because Europe has a gay climate, especially the Mediterranean regions.    Not comparable to Australia in the slightest. Fucken strewth! |
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Post by Donar on Feb 3, 2018 5:39:55 GMT -5
A good example would be Borzya It's borderline Bsk11.485 in of rain but the majority falls in the summer, and the winters are long and cold. But looks like this in the summer. But looks like this in the summer. 1 2But then there are places like the Hanford Site that gets 6.14 in of rain, with most of it falling in winter, but it still looks like a grassland/prairie. 3 4Yeah but these places are not comparable. Boryza is much colder and wetter than Hanford Site. |
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Post by grega94 on Feb 3, 2018 6:41:01 GMT -5
A good example would be Borzya It's borderline Bsk11.485 in of rain but the majority falls in the summer, and the winters are long and cold. But looks like this in the summer. But looks like this in the summer. 1 2But then there are places like the Hanford Site that gets 6.14 in of rain, with most of it falling in winter, but it still looks like a grassland/prairie. 3 4Yeah but these places are not comparable. Boryza is much colder and wetter than Hanford Site. I wasn't exactly comparing them to one another, I just brought up Hanford site since I wasn't expecting so much grass considering how hot and dry it is. |
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