Limiting global heating to merely disastrous
levels (~2C total) is now looking increasingly implausible, IMO.
In the vehicle market for example, we probably can no longer depend on the ICEVs (and hybrids/PHEVs) we are manufacturing today to wear out, before we need to replace them with lower-emission vehicles.
Instead, we would probably need to institute buyback-and-crush programs for those vehicles coming out of the world's factories today, to prevent them from continuing to spew CO2 for decades to come, further contributing to pushing us beyond ~2C of heating.
Not much chance of building the worldwide political consensus to bring that about, IMO.
http://www.wunderground.com/blog/JeffMa ... awdropping
February Smashes Earth's All-Time Global Heat Record by a Jaw-Dropping Margin
On Saturday, NASA dropped a bombshell of a climate report. February 2016 has soared past all rivals as the warmest seasonally adjusted month in more than a century of global recordkeeping. NASA’s analysis showed that February ran 1.35°C (2.43°F) above the 1951-1980 global average for the month, as can be seen in the list of monthly anomalies going back to 1880. The previous record was set just last month, as January 2016 came in 1.14°C above the 1951-1980 average for the month. In other words, February has dispensed with this one-month-old record by a full 0.21°C (0.38°F)--an extraordinary margin to beat a monthly world temperature record by...
Averaged on a yearly basis, global temperatures are now around 1.0°C beyond where they stood in the late 19th century, when industrialization was ramping up. Michael Mann (Pennsylvania State University) notes that the human-induced warming is even greater if you reach back to the very start of the Industrial Revolution. Making matters worse, even if we could somehow manage to slash emissions enough to stabilize concentrations of carbon dioxide at their current level, we are still committed to at least 0.5°C of additional atmospheric warming as heat stored in the ocean makes its way into the air, as recently emphasized by Jerry Meehl (National Center for Atmospheric Research). In short, we are now hurtling at a frightening pace toward the globally agreed maximum of 2.0°C warming over pre-industrial levels...