Combined land and ocean temperature anomalies in June in Europe, 1910-2019. 26–30 June 2019 brought the greatest June heat wave in European history. Hundreds of stations with a long-term period of record (POR) set their all-time June maximum temperature records. Graphic: James P. Galasyn / NOAA

June 2019: Earth’s hottest June on record and greatest June heat wave in European history

By Dr. Jeff Masters 18 July 2019 (Weather Underground) – June 2019 was the planet’s warmest June since record keeping began in 1880, said NOAA’s National Centers for Environmental Information (NCEI) on Tuesday. NASA also rated June 2019 as the warmest June on record, well of ahead of the previous record set in 2015. The global heat in June […]

Permafrost forms a grid-like pattern in the National Petroleum Reserve-Alaska in Alpine, Alaska, a 22.8 million acre region managed by the Bureau of Land Management on Alaska's North Slope. USGS has periodically assessed oil and gas resource potential there. Photo: David Houseknecht / USGS

Warming Arctic permafrost releasing 12 times more nitrous oxide, a potent greenhouse gas, than previously thought – “This needs to be taken more seriously than it is right now”

By Caitlin McDermott-Murphy 6 June 2019 (The Harvard Gazette) – About a quarter of the Northern Hemisphere is covered in permafrost. Now, it turns out these permanently frozen beds of soil, rock, and sediment are actually not so permanent: They’re thawing at an increasing rate. Human-induced climate change is warming these lands, melting the ice […]

U.S. shallow groundwater wetness percentile from 11 May 2019 to 13 May 2019. Graphic: NASA Earth Observatory

Wettest 12 months in U.S. history, again – “The last twelve months beat the previous record, set just a month ago, by a full 1.48 inches”

By Bob Henson 6 June 2019 (Weather Underground) – Propelled by a two-week siege of widespread severe weather and heavy rain in late May, the contiguous U.S. has once again broken its record for the wettest year-long span in data going back to 1895. According to the monthly U.S. climate summary released Thursday from the […]

Carbon dioxide levels in atmosphere hit record high in May 2019

4 June 2019 (NOAA) – Atmospheric carbon dioxide continued its rapid rise in 2019, with the average for May peaking at 414.7 parts per million (ppm) at NOAA’s Mauna Loa Atmospheric Baseline Observatory. The measurement is the highest seasonal peak recorded in 61 years of observations on top of Hawaii’s largest volcano and the seventh consecutive […]

Global average abundance of atmospheric carbon dioxide in 2018. Graphic: NOAA

Graph of the Day: NOAA Annual Greenhouse Gas Index, 1700-2018

30 May 2019 (Desdemona Despair) – Last week, the NOAA Earth System Research Laboratory posted its annual update to the NOAA Annual Greenhouse Gas Index (AGGI), which measures the climate-warming influence of long-lived trace gases, including carbon dioxide and methane. To nobody’s surprise, the AGGI continued its inexorable rise in 2018 because, for another year, […]

Zonally averaged methane (CH4) growth rate versus sine‐of‐latitude (equal area) and time for 2005–2018. Graphic: Nisbet, et al., 2019 / Global Biogeochemical Cycles

The methane detectives: On the trail of a global warming mystery – “The bottom line is that methane is going up and doesn’t look like it will stop anytime soon”

By Jonathan Mingle 13 May 2019 (Undark) – Every week, dozens of metal flasks arrive at NOAA’s Earth System Research Laboratory in Boulder, Colorado, each one loaded with air from a distant corner of the world. Research chemist Ed Dlugokencky and his colleagues in the Global Monitoring Division catalog the canisters, and then use a series of […]

Ozone hole mystery: Illegal sales of insulating chemical in China found to be source of rising CFC-11

By Matt McGrath 8 July 2018 (BBC News) – Cut-price Chinese home insulation is being blamed for a massive rise in emissions of a gas, highly damaging to the Earth’s protective ozone layer. The Environmental Investigations Agency (EIA) found widespread use of CFC-11 in China, even though the chemical was fully banned back in 2010. […]

Graph of the Day: NOAA annual greenhouse gas index (AGGI), 1700-2015

30 April 2016 (NOAA) – The annual greenhouse gas index (AGGI) is a measure of the warming influence of long-lived trace gases and how that influence is changing each year. The index was designed to enhance the connection between scientists and society by providing a normalized standard that can be easily understood and followed. The […]

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