AGU, July 21, 2020 Earth’s global “climate sensitivity” to CO2 emissions remains a fundamental question in predicting the future climate. Until now, scientists relied on a 1979 estimate of 1.5‐4.5°C per doubling of atmospheric carbon dioxide (assuming no other climate forcing). For the first time in 40 years, this consensus report – part of preparation […]
Global Methane Budget, 2000-2017 (2020), July 15, 2020. A new consensus update to global methane emissions reveals that atmospheric methane increased by 8.5ppb and 10.7ppb in 2018 and 2019, respectively – two of the highest annual values of the 21st century. The current concentration of atmospheric methane is more than 2.5 times higher than pre-industrial […]
Global Annual to Decadal Climate Update, WMO, July 9, 2020. A new report by the World Meteorological Organization (WMO) finds a ~70% chance that global mean temperature will rise 1.5°C above pre-industrial levels for at least one month within the next 5 years. This projection does not necessarily mean that the 1.5°C limit will have […]
2020年对北极来说是异常炎热的一年，尤其是在俄罗斯北部高纬度地区。从1月份开始，一股持续的持续热浪打破了纪录，在6月份达到38摄氏度（100.4华氏度）的峰值。从那以后，极端高温持续不断。例如，西伯利亚的俄罗斯城镇维尔霍扬斯克已经经历了11天以上……