The amount of carbon dioxide measured daily in the air at Mauna Loa, Hawaii, may have dipped below 400 ppm for the last time in our lives. This and several other recent milestones serve as a prelude to the upcoming United Nations climate talks in Paris, where plans for major public events have been scuttled in the wake of the November 13 attacks.
On Thursday, the American Meteorological Society (AMS) released its fourth annual special issue of the Bulletin of the AMS devoted to studies examining the links between climate change and extreme weather and climate events. New topics this year include tropical cyclones, forest fires, and anomalies in sea surface temperature and sea level pressure. For about half of the events studied in this year’s AMS report, scientists found that human-induced climate change played a measurable role in making the event stronger and/or more likely.
Residents of southern Yemen are assessing the damage after Cyclone Chapala brought dramatic flooding to the region on Monday night into Tuesday. With Yemen plagued by civil war, it is difficult to know how extensive the damage from Chapala has been. Chapala was not only the second-strongest cyclone on record for the Arabian Sea, but it was also the longest-lived at Category 3 strength.
Earth’s surface temperature has surged high into uncharted territory, thanks to a record-strength El Niño event combined with the long-term rise in temperatures due to human-caused global warming: October 2015 was Earth’s warmest month on record by a huge margin, according to data from NOAA and NASA.