stimulates an even distribution of heat, transforming places that would be too cold to live in lush, fragrant gardens. Therefore, the Mediterranean belt is temperate and favorable, and in Scotland there are places warmed by the Gulf Stream where palm trees can be grown.
But let's get back to what would have happened if the oceans had been lost. Let's say they turned to dust. But to leave us a small chance of survival, let's say this dust turned out to be wet enough (mud) not to raise a giant dust storm on the planet.
The oceans have disappeared, but we still have some water. Ice caps, lakes and rivers (which now flow over wide expanses of land), groundwater is still available. In total, they account for about 3.5% of our modern water supply, the other 96.5% disappeared along with the oceans. This is not enough to start a full-fledged water cycle in nature, even if the ice caps at the poles are melted. 68.7% of the Earth's fresh water is concentrated in glaciers, ice caps and permafrost, mainly in Antarctica. Without clouds forming over the ocean, rain will become rare and the planet will become a desert. We will watch as our lakes and water supplies gradually decrease every year until they completely dry up.
However, people will live a little. We will still have access to groundwater and will be able to run hydroponic farms. But on the surface, animals and plants will dry up. Because trees will not last long without water, everything will eventually become so dry that the continents will be engulfed in fires. People will have many problems. In addition to the usual problems associated with a fire (for example, trying not to burn alive), the flames will release tons of carbon dioxide, the atmosphere will gradually become stifling and global warming will accelerate.
The sun will continue to roast the equator, turning it into a hot frying pan. The greenhouse gases released by global fires will keep the sun's energy close to the earth. Changes in temperature due to the change of day and night will create a slight breeze, but the average temperature on Earth will be close to 67 degrees Celsius. Of course, even the most persistent desert species cannot exist at this temperature.
People will have to run. The only hope of humanity will be a window in which the Antarctic ice will remain intact, which will lead to massive migrations to the southern hemisphere. As temperatures rise across the globe, the Earth's surface will no longer be habitable, and all of our energy will go towards collecting underground Antarctic ice, where it will not evaporate. Perhaps we will build a stable biosphere underground, but the remoteness of Antarctica will significantly complicate this event. It will just be difficult to get there. Survivors will find flooded wastelands and a lack of infrastructure and resources - no mines, no roads, no food. It is unlikely that people will live to see the end of the project. Few survivors will be able to settle in underground bunkers.
But it won't get better. Plant life will disappear on the planet's surface. As long as the world burns, the atmosphere will be less and less oxygenated, and therefore unbreathable, if humans survive surface temperature incredibly. The earth will roast.
Assuming humans can live long enough in Antarctic bunkers, there is no way to restart a healthy carbon cycle or bring temperatures back to acceptable levels. In short, all living things will die out. Only small colonies of chemosynthetic bacteria, hidden underground near the hot springs, will remain. In the absence of oceans, everything else will die.
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