Did the rising temperature of the past earth cause the dinosaurs to become larger?
I will erase the post if you point out the problem. This is my first post to "evolution".

In modern times, large quadrupeds live in the tropics between 20 N ,and 20 ° S latitude. Tropical is suitable for enlarging animals.
The Jurassic and Cretaceous are in the high temperature phase, the seawater temperature near the equator is nearly 40 ° in the bath condition.
The Mesozoic climate was suitable for enlarging animals. Eating plants necessary for growth were also large.
Modern animals, including humans, growing curves of living bodies become adults in some places, and humans do not continue to grow in height even if they live longer than 20 years old.
However, an exception that does not have a size of a living body exists even now. Crocodile grows as long as lifespan, the adult body length does not exist at a constant value.
A gigantic crocodile with a length of 6 to 7 meters is discovered, but it is a crocodile living longer. On the other hand, how long is the dinosaur's life span?
The age can be estimated from the cross section of the dinosaur fossil bone. In the dinosaur bone, growing lines due to the spring and summer growing seasons and seasonal growth seasons
in the winter seem to be like annual rings. Age can be estimated by counting growth lines and annual rings of the fossil bone section.
Medium dinosaurs seem to have a life expectancy of about 30 years. Crocodiles seem to have an average life span of about 10 years.
Thirty years The dinosaur's body length has continued to grow, and such a big dinosaur was born? Background, was the tropical climate enough supply of food to support growth?
Did a bigger dinosaur have a longer life expectancy?

Carbon cycle
Carbon is present in the atmosphere as carbon dioxide, CO2 in the seawater, HCO3- in the seawater, and limestone CaCO3 in the rocks, which translates to 42 trillion tons of carbon per year,
Of the total amount of carbon dioxide in the sea, followed by land-based plants and organic matter, and finally carbon dioxide in the atmosphere. The ratio of marine is 92%, land is 6%, and air is 2%.

The carbon on these surfaces circulates in varying forms, and carbon dioxide is mostly dissolved in the ocean.

Water dissolves carbon dioxide in the atmosphere because of contact between air and water by rain and seawater by ocean waves and contact of carbon dioxide in the atmosphere
by absorption of carbon dioxide into seawater The amount of carbon dioxide emitted by burning fossil fuels is 6.3 billion tons per year in terms of carbon, and the amount of carbon dioxide
generated by photo-synthesis absorption and the generation of rotting substances from the land is shown in the table below. Results Half of the increase in fossil fuel burnout results
in an increase in the atmospheric concentration of carbon dioxide every year.

HCO 3 - in water binds calcium ions in seawater and calcium carbonate CaCO 3 It becomes limestone and deposits on the seafloor. Carbon dioxide in the atmosphere → bicarbonate ion in water → calcium carbonate in the rock and from sea water to solid rock. The rocking speed is slower than the reaction between the atmosphere and sea water, and the amount of carbon that will become sediment at the bottom of the ocean is about 10 million tons annually . In the past earth, carbon dioxide in the atmosphere was absorbed in the ocean, oceanic carbon dioxide combined with calcium, changed to sedimentary rocks and limestone in the ocean floor. It is nearly 1000 years necessary to become a rock .

The ocean and rain are liquids that absorb carbon dioxide and converted into rocks. Carbon dioxide released into the atmosphere by combustion of fossil energy is half absorbed by the ocean, half of it is absorbed by the terrestrial ecosystem , half of it remaining in the atmosphere .

Carbon dioxide and temperature

Dry carbon dioxide concentration in the atmosphere and atmospheric temperature in the past global environment have been investigated by boring survey of the polar ice sheets to investigate the relationship between the ancient atmospheric constituents confined in the ice, the isotopic ratios of oxygen atoms of ice, the mixture of deuterium According to the ratio, the past temperature can be estimated and the carbon dioxide content can be grasped. Throughout the past 500,000 years, the polar temperature fluctuation and carbon dioxide concentration fluctuation are almost synchronized. The thing to watch out for is the change in atmospheric temperature, the fluctuation in carbon dioxide concentration is the result.

In the Ice Age, 340 ppm of carbon dioxide is lost from the atmosphere, and dissolved carbon dioxide as a deep ocean water reservoir increases . At low temperatures, the ocean absorbs a lot of carbon dioxide and high temperatures release much carbon dioxide from the ocean. During the high temperature period the concentration of carbon dioxide in the atmosphere rises.

Due to the insulation effect of greenhouse gases, carbon dioxide in the seawater is released due to the temperature change of the earth itself due to the glacial period and the interglacial period, rather than the temperature rise.

Ice ages

In what direction is the time when the Earth's elliptical orbit is closest to the sun in the whole sky? The inclination of the Earth's axis is an interaction that is exercising the Rotating shaft rocking, and it is possible to calculate the average solar radiation amount in the tens of thousands of years. It has been confirmed that this is consistent with the data of the paleo temperature of the past polar ice sheet boring survey.

Greenhouse gas is a political term, and the effect of trace carbon dioxide of about 380 ppm on temperature rise is not certain. Observation on the scale of the past ten thousand years occurs due to ice in the atmospheric carbon dioxide concentration during the warm season and carbon dioxide dissolved in the deep ocean water return to the atmosphere during the ice age.

Naoki Kato