"The author is a grape farmer and wine maker, and a close observer of climate.
It is widely asserted that grape vintages are nowadays earlier, due to hotter summers.
I reject that assertion.
Winters are warmer than in the past.
Not summers.
The earlier start to a longer growing season and enhanced availability of CO2 enhances photosynthetic capacity.
It improves efficiency in the use of scarce water by the grape vine.
This very likely accounts for the earlier time of ripening.
In addition, when the ripening month has been in February, the warmest month, and it occurs in January, the maturation period is cooler than hitherto, an advantage.
The Australian Bureau of Meteorology’s maintains that Australia’s climate has warmed on average by 1.44 ± 0.24 °C since national records began in 1910.
But this statistic is the result of averaging monthly data that gives equal weight to autumn, winter, spring, and summer months.
The inference is that temperature is rising in summer, in daytime when the sun is shining and this is considered a dangerous development.
To establish whether there has been warming in summer we should examine the average daily maximum temperature in locations that are already, or likely to become, unsuitably warm from the plant productivity/fruit quality point of view.
... Surprisingly, only a few towns in this zone have temperature records for a century or more ... Mildura, Kalgoorlie, Adelaide, Alice Springs and Bourke.
Their locations are indicated on the map below:
When the minimum temperature varies in a manner that is out of concert with the maximum, logic suggests that something other than a ‘greenhouse effect is involved.
In my estimation there appears to be a cycle about 100 years in length, which is likely solar driven, influencing the distribution of atmospheric pressure, cloud cover and the planetary winds.
This changes the ocean currents and the pole to equator temperature gradient.
Remember that greenhouse gases are well mixed.
If warming is produced by burgeoning levels of greenhouse gases, it should be evident in all seasons, in both the minimum and maximum temperature, everywhere, without exception.
Warming should be a one-way affair, constantly up.
The Greenhouse mechanism can’t take a holiday.
Notice that, over a century or more, the change in the central tendency in the maximum temperature is a fraction of the change that occurs in the space of a few years.
... A Caution -- Regrettably, the temperature record from the BOM is sparse and discontinuous.
Recording stations open and close.
There have been changes in the type of housing that shield thermometers from direct sunlight.
There have been changes in the amount of vegetation that cools the air in the vicinity of the recording station.
One cannot assume that data from our BOM, possibly no better or worse than that of any other country, is capable of supporting an assertion that the background air temperature has changed from one decade to the next, let alone over a period of one hundred years.
... Many sources of uncertainty are attached to the measurement of air temperature.
In my view the BOM and the CSIRO should recognize the uncertainties, pay a lot more attention to seasonal data, up their game so far as logic and observation is concerned and practice the precept that ‘honesty is the best policy’.
... Self described ‘climate scientists’ who rely upon numerical models, built on airy-fairy assumptions, predicting warming, have a vested interest in the climate scare.
... The cost of energy to Australian households at $US0.26 /kW hour is more than three times the $US0.08 in China and the gap is widening.
Cheap energy is the foundation of human progress and material welfare.
... We are witnessing the decline of Western Civilization, hamstrung by ideological commitment to the “Green New Deal’, ‘The Great Reset’ and ‘zero carbon by 2050’, all recipes for economic and social stagnation.
... So called ‘scientists’ that select data to support an agenda, are either naïve, or corrupt.
This gives science a bad name.
The northern Hemisphere is currently experienced the coldest winter in many decades.
... We should acknowledge that the last fifty years of ‘Climate Change’ has been beneficial.
Warming in autumn, winter and spring is a great advantage.
It lengthens the growing season.
More carbon dioxide in the atmosphere is favourable to plant life.
... Let us rid ourselves of this absurd notion that the carbon dioxide in the atmosphere is a problem."
