No Images? Click here The first half of 2019 has been the 3rd hottest on record globally, while the U.S. continues to deal with record rainfall. Following today’s release of NOAA’s monthly global temperature analysis, it’s time to look back at the first half of 2019. Using re-baselined NOAA and NASA data, we find that this year is on pace to be the 3rd hottest on record globally (3rd hottest according to NASA; NOAA showed a tie for 2nd). This ranking would maintain the most recent five years as the hottest five on record. While U.S. heat hasn’t been as extreme this year, record rainfall has plagued the country for months. Across the world, this year has been loaded with record high temperatures. Here are a few highlights:
Human sources of greenhouse gas emissions are also at an all-time high. Those emissions add to the thickening blanket of heat-trapping gases in the atmosphere, turning recent years record-hot. Even small changes in average temperature can greatly magnify extremes. According to World Weather Attribution, climate change made Europe’s recent heat wave at least five times more likely. Such extremes will happen more frequently and intensely as the climate warms, unless emissions are rapidly reduced. While U.S. temperatures have been close to average this year, rain totals continue to break records. June capped the nation’s wettest 12 months on record—just as May and April had before. Not much has changed since our late May raincheck, as vast swaths of the Plains and West still exceed year-to-date averages by 50% or more. But Hurricane Barry has made matters worse for Louisiana and Arkansas, which have already seen some of the largest increases in annual precipitation. As higher temperatures supercharge the water cycle, stronger downpours will continue to amplify flood risks. On the plus side, 2019 has also seen more local clean energy commitments, from cities and states to utilities. Steps like these are an important start in limiting the emissions that lead to warming. METHODOLOGY Monthly global temperature analyses are independently calculated by NASA and NOAA/NCEI. Climate Central combines the NOAA and NASA information to re-baseline global temperatures using an earlier pre-industrial baseline of 1881-1910 in response to the Paris Climate Change Agreement. NASA’s calculations are extended to account for temperature changes at the poles, where there are fewer stations. NOAA does not use any extrapolation to account for low station density at the poles. SUPPORTING MULTIMEDIA See more high-resolution graphics and videos in our searchable media library. METS IN ACTION NOAA For more on the past and projected increases in heavy rain, check out this recent NOAA feature. NASA Here’s how hydrology models are teaming up with satellite observations to track our water supply. CLIMATE RESEARCH A recent study in PLOS ONE estimates what 520 global cities will feel like in 2050 — much like our U.S. and global analyses that focus on 2100. OCEAN NEWS Accidental engineering: Researchers uncover an inadvertent iron enrichment experiment occurring in the open ocean. |