Core Viewpoint - The extreme heat waves experienced in multiple countries in the Northern Hemisphere this summer are attributed to abnormal atmospheric circulation, occurring against the backdrop of significant greenhouse gas emissions and rising global temperatures [1] Group 1 - The summer of this year has seen record-breaking high temperatures in various countries [1] - The chief of the International User Service Center at the National Satellite Meteorological Center, Zheng Zhaojun, indicates that the extreme heat is a direct result of abnormal atmospheric circulation [1] - The phenomenon of extreme heat is occurring within the context of ongoing greenhouse gas emissions and a continuous rise in global temperatures [1]

Group 1 - The core viewpoint is that the Northern Hemisphere, particularly Europe, is experiencing extreme heat waves this summer, with temperatures exceeding 40 degrees Celsius in several regions [1][3][4] - Spain and France are among the most affected countries, with Spain recording temperatures as high as 46 degrees Celsius and France experiencing widespread high-temperature alerts [1][3] - The World Meteorological Organization (WMO) indicates that global temperature rise is a trend, primarily driven by human-induced carbon emissions [4][6][8] Group 2 - The Mediterranean region is experiencing record high sea surface temperatures, which contribute to the extreme heat on land [6][8] - The WMO reports that the duration and intensity of heat waves are increasing globally, with the third hottest June on record recently observed [4][6] - Climate change is exacerbating extreme weather events, leading to more intense rainfall and storms due to increased atmospheric moisture [8][10]