It's interesting, but those countering man's contribution to this will point out that going back 30 million years CO2 levels were twice as high as they are now, without man's involvement.

These are very valid observations, but it still won't convince those that say it's just a natural process of the Earth when looked at in geological time, of which 1000 years is just a miniscule speck. The thing that is directly related to man, and he didn't mention, is the amount of polycarbonite particles in the oceans.

The plastic that has been dumped in the oceans, and now forms a particulate mass as it decomposes, that is having detrimental effects on sea life, and has no other instances of it's presence in any core samples. This is one of the only man made hazards that can't be refuted, or blown off as just a natural cycle of the Earth, and it is growing bigger as more plastic is dumped in the oceans, and waterways. How many times do you see someone just throw there empty plastic bottle wherever they are at. You can't go to the beach without seeing them wash up with the tide.

The raising of CO2 levels can be attributed of man, but there are also those that can refute this, but there is no refuting mans ignorant disposal of plastics.

"The Ross Ice Shelf is the largest ice shelf of Antarctica (an area of roughly 487 000 km2, and about 800 km across: about the size of France[1]). It is several hundred meters thick. The nearly vertical ice front to the open sea is more than 600 km long, and between 15 and 50 meters high above the water surface. 90 percent of the floating ice, however, is below the water surface."

If the Ross Ice Shelf breaks loose and melts = 6 meters sea level rise = cabin cruiser for Sukhumvit Harbor.

The ocean is already devastated and still under attack by mans irresponsible lifestyle !

scary

long and interesting

Thank you for comments.

Not only has the atmospheric concentration of CO2 — the principal human-generated greenhouse gas — risen sharply in recent decades, it has risen at a rate that is unprecedented in the past million years (see “Humans boosting CO2 14,000 times faster than nature, overwhelming slow negative feedbacks“). As the author of 2008 study on this subject noted, “the average change in the amount of atmospheric carbon dioxide over the last 600,000 years has been just 22 parts per million by volume.†Humans have run up CO2 levels 100 ppm over the last two centuries. The author added, “Right now we have put the system entirely out of equilibrium.“

Joe Romm, Climate Progress