Because global temperature stopped going up 8000 years ago, and had been gradually cooling since. It should have kept on slowly cooling into the next ice age. That's how the natural cycle was working. Instead, things totally reversed and switched to fast warming. Being that's the exact opposite of the natural cycle, it's clearly not the natural cycle.
What? Are you smoking crack? No. That's not how the natural cycle was working.
Because you say so?
As is usual, I notice the complete lack of evidence to support the loopy claim you made.
Can you show me why you believe that was how the natural cycle was working that way?
I believe it because the data shows it.
Look at the sawtooth pattern of your own graph. Fast warmup, slow cooldown.
Look at the holocen temps graph. The fast warmup ended 8000 years ago. We were in the slow cooldown phase. That is, until it suddenly completely reversed.
If you're not familiar with basic facts such as this, you shouldn't be bothering the grownups.
You like to play with scales, don't you. You need a better perspective. Of course, if we assume that you are right - that temperatures were going to fall - then we must also assume that we would have descended into another ice age, lol.
As stated before, every time I see you use this graph in order to lie, I will post the original article. Where NASA scientists come to a far different conclusion than you do.
Global Warming : Feature Articles
How is Today’s Warming Different from the Past?
Earth has experienced climate change in the past without help from humanity. We know about past climates because of evidence left in tree rings, layers of ice in glaciers, ocean sediments, coral reefs, and layers of sedimentary rocks. For example, bubbles of air in glacial ice trap tiny samples of Earth’s atmosphere, giving scientists a history of greenhouse gases that stretches back more than 800,000 years. The chemical make-up of the ice provides clues to the average global temperature.
See the Earth Observatory’s series
Paleoclimatology for details about how scientists study past climates.
Glacial ice and air bubbles trapped in it (top) preserve an 800,000-year record of temperature & carbon dioxide. Earth has cycled between ice ages (low points, large negative anomalies) and warm interglacials (peaks). (Photograph courtesy
National Snow & Ice Data Center. NASA graph by Robert Simmon, based on data from
Jouzel et al., 2007.)
Using this ancient evidence, scientists have built a record of Earth’s past climates, or “paleoclimates.” The paleoclimate record combined with global models shows past ice ages as well as periods even warmer than today. But the paleoclimate record also reveals that the current climatic warming is occurring
much more rapidly than past warming events.
As the Earth moved out of ice ages over the past million years, the global temperature rose a total of 4 to 7 degrees Celsius over about 5,000 years. In the past century alone, the temperature has climbed 0.7 degrees Celsius, roughly ten times faster than the average rate of ice-age-recovery warming.
Temperature histories from paleoclimate data (green line) compared to the history based on modern instruments (blue line) suggest that global temperature is warmer now than it has been in the past 1,000 years, and possibly longer. (Graph adapted from
Mann et al., 2008.)
Models predict that Earth will warm between 2 and 6 degrees Celsius in the next century. When global warming has happened at various times in the past two million years, it has taken the planet about 5,000 years to warm 5 degrees. The predicted rate of warming for the next century is at least 20 times faster. This rate of change is extremely unusual.
Note that I also post a link so anyone can verifiy that is a credible site. You do not because you know that if you do they will realize that you are pushing bullshit.
