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Timely seasons

It does seem silly that October and November are in spring, that March is in autumn, when in our neck of the coast they're decidedly warm and often wiltingly hot. The problem is that our seasons are a fit for what happens in the northern hemisphere, not for what happens in Australia.

The head of Sydney's Royal Botanic Gardens, Tim Entwisle, is proposing a solution that has a much greater value than getting the seasons to fit what actually happens in our world. That extra value is to be had in asserting our independence as a nation with enough collective intelligence to create our own standards, and while we're at it we might take the opportunity to send the Queen a pink slip!

Dr Entwisle proposes that, for the Sydney coastal strip that includes Lake Macquarie, Newcastle and Port Stephens, we move spring forward a month so that it includes the spring flush of flowering. Fancy having spring fit nature! So our spring will be in August and September, just two months; pre-summer will be October and November; peak summer will be December, January, February and March; autumn April and May; and winter June and July.

I'm with him all the way, and not just because I felt spring arrive on Sunday with such force that I spent the day digging and planting my vegetable garden. And someone else who's with him, as I explain at more length in my column in The Herald today, is Kevin McDonald, the Seaham-based co-ordinator of nature observers who pool their notes in a project called Nature Watch.

Where are you? Still stuck in winter?

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Date: Newest first | Oldest first
Spring is early this year, and does seem to start before September. I actually pay more attention to the season, and the change in season, than the date on the calendar. I'm harvesting the winter crops (broad beans, peas, broccoli, beets, onions, etc), and getting ready to plant lettuce & all the other warm weather gear. It's the best time of year. It probably makes sense to tweak the official start dates of the seasons, but the Universe won't notice........
Posted by Abundance, 11/08/2009 10:28:25 AM, on The Herald
As Jimmy Durante said “ Spring is sprung, The grass is riz, I wonder where The boidies is?” They’re in my backyard. The currawongs, heralders of spring, are in full voice. Easter rosellas are visiting in growing numbers. Frangipani tree has 2 x green leaves. It’s all happening.
Posted by Doug, 11/08/2009 10:45:48 AM, on The Herald
Jeff, there has been some of this fantastic modeling of the weather patterns and apparently, according to the bible of climate modeling (you know, the same type of modeling that predicts 6 meter sea level rise) thinks there will be less varience in the weather so we may get a summer all year round, especially if Global Warming has something to say about it.
Posted by Nafe, 11/08/2009 12:06:21 PM, on The Herald
Maybe I am wrong, but I seem to recall that Wattle Day was August 1st when I was growing up, but was changed to September 1st for some reason. Does anybody else recall this or am I in the first stages of dementia?
Posted by stormbringer, 11/08/2009 12:09:53 PM, on The Herald
Looks like you are bringing a storm today, stormbringer. Tim Entwisle says Wattle Day was celebrated on August 1 between the world wars and that it is still celebrated on that date in some places, among them Orange.
Posted by Jeff Corbett on 11/08/2009 12:54:27 PM
It does not feel like spring today. Bloody climate change. I blame NBN's weatherman Gavin. Should someone throw a milkshake at him?
Posted by Buell, 11/08/2009 12:12:41 PM, on The Herald
bring on global warming. I'm freezing today !!
Posted by fista, 11/08/2009 1:46:50 PM, on The Herald
Nice point, fista. Interestingly spring is not just about temperature but also day length, and I think there is a third factor, increasing day length. Just as fish can sense when the tide is falling or rising, and so they know whether they should head for a hole or for the flats, I think animals (and people) sense the waxing or waning of daylight. You should be planting your tomatoes soon.
Posted by Jeff Corbett on 11/08/2009 3:52:52 PM
It's climate change fista - global warming has been quietly put to rest by the ecomaniacs. That's why it's cold and raining - climate change.
Posted by stormbringer, 11/08/2009 2:38:19 PM, on The Herald
yes still stuck with that bitch called 'winter' the tattooed, dark, nasty fool of all the seasons.
Posted by senior sergeant smith, 12/08/2009 10:27:22 AM, on The Herald
Regarding the observance of Wattle Day we should note Hopkins' Law which states that any given phenological event differs by four days for every degree of latitude, one and a quarter days for each degree of longitude, and one day for each 30 metres of altitude. Since Melbourne is on latitude 38degS and Newcastle is on latitude 33degS (a difference of 5 degrees), a delay of about twenty (4x5) days or nearly three weeks may be expected in flowering (and migration) times. Thus the late-winter and early spring wattle flowering occurs earlier in NSW than in Victoria, so 1 August for Wattle Day is more appropriate in NSW than for Victoria. However, it seems that those pesky Victorians won the argument setting 1 September as the "official" date for Wattle Day. All these sorts of phenological events are caused by the fact that the earth is inclined at an angle of 23.5 degrees to the plane of its orbit around the sun, thus causing the seasonal phenomena being discussed in Jeff's column. If the earth's axis was at 90 degrees to the plane of its solar orbit we would not have any "seasons"! Variations in weather phenomena have many complex causes. It is silly to blame AGW as the sole cause.
Posted by Kevin McDonald, 12/08/2009 11:00:18 AM, on The Herald
I'm sorry, but what you and Entwisle have said is ill-thought-out nonsense, not backed by meteorological data. As someone who has studied both meteorology and climatology, let me tell you now that the mean August temperature is very similar to the mean June temperature in most cities in Australia. In most eastern cities of Australia, the average August minimum is in fact *lower* than the average June minimum. In other words, August is just as wintry, if not more so, than June, on average. Of course you will still get freak days that break this pattern, but seasons aren't defined by freak days, they're defined by climate (average weather). Also, October and November, on average, are *well below* December-February averages. Stop basing your ideas about seasons on "intuition", and start using scientific data! And there is nothing particularly unique about the so-called "European seasons". The four-season model applies to ALL temperate regions on Earth. If you graph mean monthly temperatures over the course of one year, just about ALL temperate locations will display a **distinct** sinusoidal curve. Do it and see for yourself. There's nothing "European" about four seasons.
Posted by Anthony, 20/08/2009 6:33:26 PM, on The Herald
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Jeff Corbett
Bend the online ear of the Hunter's most provocative columnist.

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