Instead of trying to remove CO2 it looks like simply blocking the Strait would cool the Arctic water enough to offset global climate change. This could be accomplished with man made reefs or simply parking unused tankers along the path. Ice would only have blocked the strait to a depth of 20 to 50 feet in the beginning so it is not by any means impossible to accomplish the same thing. Even a fence would do it.

It would seem that no one on the research team has read; Earth's Shifting Crust by Charles Hapgood; or, for that matter, ever lived here in East Hampshire in the UK, with a sea floor surface to walk upon, covered by fossilised sea urchins.

Since large hot sea water surfaces can emit much more CO2 than small cold seasurfaces, it is very unlikely, that the small Bering Sea could determinate the CO2-level of the atmophere. Also, since there is still no scientific evidence that atmospheric CO2 could have a measureable effect on the global average temperature, so it is very unlikely, that any decrease in atmospheric CO2-level could cause such a drastic cooling like an Ice Age. The global average temperature is determined basically by global wind systems and cloud formation, because these are the main factors determining the radiation absorptivity, reflexivity and emissivity of the Earth. Hence, the real answer for climate change could be in the changes in global wind systems. A totally unknown topic, CO2-believers don't even mention.

The rise and fall of great Empires, Dynasties and other civilisations had no modern day Co2 production, but they failed. So what happened? The SUN is cyclical. Cosmic rays anyone? Whoa... We must think bigger than the man made co2 tax scam or ice walls. Change will happen and Food is the problem. Grand Solar Minimum Much?

Rumata seems to forget that warming/cooling has an effect on wind patterns and ocean currents. Which leads to cause-and-effect discussions . . . and discussions about, "does this amplify that - or does this damp that?"

Rumata: Don't bring facts into this. The Church of AGW will scourge you.
My takeaway using their logic, however, is we need enough CO2 to be damned sure this doesn't happen again, because ice ages are bad for civilization.

This looks like hedge research to me. There is a perceived need to elevate the importance of CO2.

Less CO2 is less fuel for plants who breathe it. Animals need plants to live. We are animals. It follows we need to worry about an ice age, not warming. Bring on the CO2! (If it really does increase temp.) I doubt it.
There is a strong correlation between sunspots and weather. It may be impossible to stop the big swings. One answer is to build orbiting cities, another is to inhabit other bodies, another is to learn how to live in space.
Adapt or become extinct.

For much more on this subject, I recommend the curious go to Youtube and look up a fellow named Randall Carlson.
He has much to say on this (and other) subjects, based on known, but under-discussed events of the past.

If dBro's comments are any indication, then clazy climate zealots will attempt to bring on another ice age starting RIGHT NOW. God help us.
C'mon, guys. Settle down. Mother Nature has this in hand without our butting in with our lamebrain notions. Let HER handle this, eh?