Search This Blog

Thursday, September 13, 2018

Countries are not meeting targets to cut carbon emissions

Countries are not meeting targets to cut carbon emissions. Without major reductions in emissions, the increase in annual average global temperature relative to preindustrial times could reach 5°C or more by the end of this century. See here, here and here.

I went back to seeing this documen
tary that i feel everyone on this planet should see : 

The implications are many but include these atleast : 

Sea level rise will make coastal communities retreat inland - property values in the inundated areas will plummet and lots of new infrastructure will have to be built. and for countries and places that cant immediately afford it, lower levels of service for all the things we now take for granted.. 

Increasing forest fires are another hazard : Studies have found that forest fires in the western US have been occurring nearly five times more often since the 1970s and 80s. Such fires are burning more than six times the land area as before, and lasting almost five times longer. 2015 was a record-breaking year in the US, with more than 10 million acres burned. That's about 4 million hectares, or an area of the size of the Netherlands or Switzerland. 

In fact, wildfires are burning more area around the world. The areas where wildfires are taking place are always areas that have become drier and hotter, and where spring has come earlier.

Fire is a natural and beneficial part of many forest ecosystemsOver the decades, undergrowth builds up on the forest floor - so when a fire burns through, that provides space for larger, more mature trees that are more fire-resistant. But the unnatural increase in wildfires is causing entire forests to burn down uncontrollably. 

Global warming is increasing forest fire risk in the Alps as well. Humid, forested areas are most likely to face greater threats from wildfires, as conditions there grow drier and hotter due to global warming. 

Just one degree additional warming can see new desserts emerging in the western united states, leading to shortages of grain in the world. The great plains lie across 12 states of the US. Drought and changeover of land from grassland to cropland is creating conditions reminiscent of the dust bowl years.. 

Droughts in the late 21st century over the Central Plains and Southwest America will likely exceed even the most severe megadroughts of the past.

It has not been warme
r than today for the last one million years. But the sorts of temperatures that climate models tell us may occur by 2100 or in the next century, peaked about 55 million years ago to 5° to 8°C more than today. The temperature rise then occured over a few thousand years, with the Arctic Ocean reaching a subtropical 23°C. Mass extinctions resulted.

The warming, which lasted 200,000 years, was caused by the release of massive amounts of methane or CO2. It was thought to have come from the thawing of methane clathrates in deep ocean sediments, but the latest theory is that it was caused by a massive volcanic eruption that heated up coal deposits. 

No comments:

Post a Comment