How has Global Warming changed over time??

Question

Like, how has it changed from the past? Are things worse now???

Answer 1

The effects of global warming in the past wasn't as serious as now. That is because of the rise in the amount of greenhouse gas emission, because of human activities, which contribute to pollution and greenhouse gas emissions.

Answer 2

Yes, along with greenhouse gases:

http://www.realclimate.org/index.php?p=2...

http://www.realclimate.org/index.php?p=2...

...as noted by Thomas Stocker “We find that CO2 is about 30% higher than at any time, and methane 130% higher than at any time; and the rates of increase are absolutely exceptional: for CO2, 200 times faster than at any time in the last 650,000 years.” Look at how slowly CO2 rose at the end of each glacial period compared to now. In the Dome C core EPICA 17,000 BP it was 190 ppm and took 5400 years to rise to 250 ppm:

ftp://ftp.ncdc.noaa.gov/pub/data/paleo/i...

New Research Confirms Antarctic Thaw Fears - Spiegel Online

http://www.alertnet.org/thenews/newsdesk...

"...the Pine Island Glacier has shrunk by an average of 3.8 centimeters annually over the past 4,700 years. But the Smith and Pope glaciers have only lost 2.3 centimeters of their thickness annually during the past 14,500 years. Satellite measurements taken between 1992 and 1996, though, show a loss of 1.6 meters in thickness per year on the Pine Island Glacier -- a figure that represents 42 times the average melt of the past 4,700 years."

Answer 3

Natural phenomena ....... ok

Answer 4

Personally, I believe it's a planetary cyclic occurrence.  If you research paleontological records, you'll find that fossils were discovered in the arctic regions from plants and animals that were indigenous to the tropics.  Must've been real warm way back then.