Having set three new February daily temperature records in the last eight days something occurred to me this morning. If the Northern Hemisphere climate really does flip subtropical as I have been predicting the difference between Summer and Winter CO2 readings should narrow down a lot from where it is now.
Most people reading this know already that CO2 levels drops in the months of June, July, August and part of September. It then starts rising late October and rises all the way through the following May.
The reason for this is the Northern Hemisphere growing season intensifies as both the temperature rises from March through July and the number of daylight hours increase gradually from January through June. The two effects overlap creating what we call Spring and Summer.
Well in a Subtropical Northern Hemisphere climate the freezing temperatures of November-March in the bulk of the hemisphere dissipates as a weather driver. For nearly all the territory between 70 North and 25 SOUTH of the equator there is no freezing period of time. That means in the north over most of Canada and Alaska and Siberia and Eastern Europe through Scandinavia there is not winter freeze to stop plants from growing in winter. The limiting factor shifts from temperature to hours of daylight alone.
To be clear in NW Ohio where I live I am about 41 degrees north and here the winter daylight in late December is down to about 8 and a half hours while in late June it approaches 16 hours. That difference over six months will still have a strong effect on how much growth takes place in the winter months. The other factor is, leaf and organic debris decay are what causes CO2 to rise rapidly in November, but in general rot comes to a halt over much of the north in December, January and February because frozen material is relatively stable.
Under the climate flip scenario rotting vegetation will be limited by the next least factor, probably moisture. If winters still have precipitation as rain instead of snow there will be a lot of rot going on unabated.
If you look at the current pattern of the CO2 cycle the decay and uptake portions are almost in balance in the last two weeks of September and first two weeks of October each year. The same is true in the last two weeks of May and first two weeks of June each year. The difference is deciduous trees drop a lot of leaf litter starting in October through November that decay out CO2 and in the spring the trees put out new leaves in April and May depending on tree species that start taking up CO2. In the tropical scenario the predominant trees are broad leaf evergreens, like Palm Trees and Azalea. Those trees grow constantly and drop leaves individually instead of all at once like Deciduous trees do in the fall. Even with the low number of hours of sunlight in winter they still take up some CO2 all winter in the regions where they currently grow. In the tropical scenario there range goes from within 30 degrees of the equator all the way to 70 degrees north, across a much greater swath of territory. Again I believe the limiting factor will be water. There is such a thing as tropical deciduous trees, for example several species of tree on Madagascar that drops its leaves at the beginning of the dry season to conserve moisture and leafs out when the monsoon season breaks the annual drought.
I should be able to change a diaper, plan an invasion, butcher a hog, design a building, write, balance accounts, build a wall, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, pitch manure, program a computer, cook, fight efficiently, die gallantly. Specialization is for insects.