Scientists estimate that under the global climate treaty's current pledges, the world is still on track to warm by roughly 2.7 degrees Celsius by 2100.
Based on policies and actions in place as of November 2022, the global temperature increase is estimated to reach a median of 2.7 degrees Celsius in 2100.
In the climate whiplash phase that follows this relatively moderate scenario, global mean temperatures are likely to climb 2–3°C higher than today by 2200–2300 AD, then enter a cooling recovery phase lasting as much as 100,000 years.
By 2100, the projected warming is between 1.2°C and 4.1°C, similar to the range projected by AOGCMs. A large constant composition temperature and sea level commitment is evident in the simulations and is slowly realised over coming centuries. By the year 3000, the warming range is 1.9°C to 5.6°C.
2100: Either uninhabitable or beginning to repair
Over the coming two decades, extreme weather is set to disrupt society with increasingly severe bushfires, drought and storms. The good news is by the end of the century, living on Earth could actually be more pleasant than it is today.
The mobile-friendly MyClimate 2050 tool shows almost all areas across Australia will experience longer and hotter summers, with temperatures increasing by an average of 2.32°C.
The report stated there was “very high confidence” that temperatures would rise across Australia throughout the century, with the average annual temperature set to be up to 1.3C warmer in 2030 compared with the average experienced between 1986 and 2005.
Climate Change Over the Past 100 Years. Global surface temperature has been measured since 1880 at a network of ground-based and ocean-based sites. Over the last century, the average surface temperature of the Earth has increased by about 1.0o F.
Their research suggests that Earth's surface cooled from roughly 167o F (75o C) about 3 billion years ago to roughly 95o (35o F) about 420 million years ago. These findings are consistent with previous geological and enzyme-based results.
We will likely live longer and become taller, as well as more lightly built. We'll probably be less aggressive and more agreeable, but have smaller brains. A bit like a golden retriever, we'll be friendly and jolly, but maybe not that interesting. At least, that's one possible future.
While the effects of human activities on Earth's climate to date are irreversible on the timescale of humans alive today, every little bit of avoided future temperature increases results in less warming that would otherwise persist for essentially forever.
The heat is distributed around the world through weather and oceanic currents. The current understanding is that if all of the additional heating to the planet caused by humans was eliminated, a plausible outcome is that Earth would reach a global surface air temperature peak in closer to 10 years than 40.
Even after those first scorching millennia, however, the planet has often been much warmer than it is now. One of the warmest times was during the geologic period known as the Neoproterozoic, between 600 and 800 million years ago. Conditions were also frequently sweltering between 500 million and 250 million years ago.
It might be hard to imagine, but it's true: As of today, if you are 35 years old or younger it is quite probable you will live to the see the year 2100 and witness the beginning of the 22nd century. To have your life span over three different centuries?
The world of 2099 will be unrecognisable from the world of today, but it can be predicted, says a leading visionary. Futuristic structures tower over the landscape. Giant, alien-looking trees light up with dazzling colours amid the hundreds of plant species that grow up their trunks.
Though the climate of Earth will be habitable in 2100, we will be experiencing new extremes. Each decade will be different from the previous and next decade. The climate future could be quite bleak.
We can look at a day 70 million years ago. It's pretty amazing.” “Chemical analysis of the shell indicates ocean temperatures were warmer in the Late Cretaceous than previously appreciated, reaching 40 degrees Celsius (104 degrees Fahrenheit) in summer and exceeding 30 degrees Celsius (86 degrees Fahrenheit) in winter.
Over the past 4.5 billion years, the Sun has gotten hotter, but also less massive. The solar wind, as we measure it today, is roughly constant over time.
Therefore, we know that by about 4.0 billion years ago the Earth's surface temperature was between 100 and 0oC.
In 100 years, the world's population will probably be around 10 – 12 billion people, the rainforests will be largely cleared and the world would not be or look peaceful. We would have a shortage of resources such as water, food and habitation which would lead to conflicts and wars.
Very hot. During this Mesozoic Era — from about 250 to 66 million years ago — the concentrations of CO2 in the atmosphere were around 16 times higher than now, creating a "greenhouse climate” with temperatures on average six to nine degrees warmer than today.
The eight warmest years on record have now occurred since 2014, the scientists, from the European Union's Copernicus Climate Change Service, reported, and 2016 remains the hottest year ever.
Three major economic centres are set to become uninhabitable by the end of the century, with global temperatures on track to warm by 2.7C. Darwin, Broome and Port Hedland are predicted to be pushed outside the “human climate niche” — that is, the temperature and humidity conditions in which humans can survive.
Seasons Change
Instead of winter, the researchers believe Australians will experience spring, autumn, and a longer season they're calling "new summer." During this new season, temperatures will consistently peak above 40 degrees Celsius (104 degrees Fahrenheit) for sustained periods of time, based on predictions.
Maximum temperatures are expected to be higher than average over most of Australia this winter, particularly during the second half of the season if El Niño and a positive IOD become entrenched.