Ariel Schwartz writes some really out there articles about the climate, but I think she has gone a bit overboard. Her understanding of the science appears to be about as deep as knowing each and every possible catastrophy that has been projected as a result of global warming, but nothing any deeper than that.
I will tackle the list of dangers that she has listed and add some facts to it. Somehow I doubt that she will appreciate a proper peer review.
Arctic Summer Sea Ice Loss
This year is a bad year for the Arctic Sea Ice Extent. No argument there, but then she adds this scientifically dubious statement.
This will mean more water in the ocean, which will ultimately lead to to higher sea levels and increased flooding.
Now the Arctic ice already goes through large fluctuations each year. The peak coverage is ~14 million km2 while the minimum is ~ 4 million km2. It has been as low as 3 million km2. So while people have attempted to claim that freshwater density and such will result in higher sea levels, the yearly variation of 10 million km2 has no detectable trace in the sea level. Yet the reader is left to believe that the last 3-4 million km2 will make more difference than the other 10 million km2. Enough so that worldwide flooding will ensue. Call me a skeptic on that one.
Amazon Rainforest Dieback:
This is a fascinating one. Too bad it is for all the wrong reasons. There is the problem of deforestation that certainly is happening. The one of warming temperatures is silly. The ENSO does cause cycles of drought and flood to the Amazon, but that has been happening for a very long time. I might also point out that I just covered the temperature trend of the Tropics and there is no significant trend in the data. None. The problems the Amazon is facing are human caused, just not global warming caused. I could argue that higher CO2 is better for plants (which is true), but that isn’t even needed. The foundation for warmer being bad for a tropical rainforest is silly.
Atlantic Thermohaline Circulation Shutdown:
This does shutdown on a fairly regular basis. Probably once every 10,000 years there seems to be evidence that it shuts down. The last time it happened was 8,200 years ago during the Younger Dryas event. There is evidence that such shutdowns have happened 7 times in the past 90,000 years. The idea that such events lead to mass extinction of life in the oceans through oxygen depletion is not based on fact.
So while the THC will shutdown in the future (based solely on the fact that it keeps doing so in the past), there is nothing unusual about such events. Certainly no mass extinctions from them. This is real ugly FUD.
Antarctic and Greenland Ice Sheet Meltdown:
This is the last one I am going to cover. I have covered Greenland before. Even the reports that cry disaster show that Greenland is either adding mass or losing mass. The trends there take place on scales of 100 years. If the current rate continued it would only take 15,000+ years for it to melt.
The worry about Antarctica is really baseless. While the Taylor Ice Dome is not in Western Antarctica, it does show that there is often significant natural variation in temperature that also takes place on timescales of 100-200 years. We happen to be near one of the recent peaks, but that is all. The peak 700 years ago was even warmer.
To top it off, the picture in the article was a screen grab from the movie The Day After Tomorrow. This is a movie that was a contender for the worst science in a movie, ever. I will rank this article right there with it.