HumanCaused

S/N ratios and detection times from single-forcing runs and their linear combinations. a, S/N ratios for the signal trends obtained by fingerprint analyses involving the patterns of SSTAC change estimated from the MMM of different experiments. The results are for Method 1 (Methods). For O3, the MMM is calculated from the four models for which O3 results were available. The MMM in the remaining cases is based on a larger set of ten models. ALL represents…

For the ninth straight month, Earth has obliterated global heat records — with February, the winter as a whole and the world's oceans setting new high-temperature marks, according to the European Union climate agency Copernicus.The latest record-breaking in this climate change-fuelled global hot streak includes sea surface temperatures that weren't just the hottest for February, but eclipsed any month on record, soaring past August 2023's mark and still rising at the end of the month.And February, as well the previous two…

In October 2020, the Silverado fire illuminated the night sky above Orange County. In a new paper in Proceedings of the National Academy of Sciences, researchers—including Amir AghaKouchak of UCI's Department of Civil and Environmental Engineering—say that nearly all of the increase in burned area from California's wildfires in the past three decades is attributable to anthropogenic climate change. Credit: Amir AghaKouchak / UCI…

CLIMATEWIRE | A heat wave in South Asia last month intensified to record-shattering levels because of climate change. Global warming made the withering events in India and Bangladesh at least 30 times more likely to occur, according to a new study, and in Thailand and Laos, the extreme heat would have been virtually impossible without the influence of rising temperatures caused by humans. The findings were reported Wednesday by World Weather Attribution, an international science consortium specializing in the links…

Credit: Pixabay/CC0 Public Domain One of the world's largest fundamentalist Christian education groups is teaching its students climate change denial as fact, and still presents the theory of evolution as an "absurd and discredited" conspiracy theory, finds a report by University College London (UCL) researchers. Accelerated…

Observed and simulated changes in global-mean monthly mean temperature in six atmospheric layers. Credit: Proceedings of the National Academy of Sciences (2023). DOI: 10.1073/pnas.2300758120 New research provides clear evidence of a human "fingerprint" on climate change and shows that specific signals from human activities have altered the temperature structure of Earth's atmosphere. …

On the left, the graphic shows that Arctic sea ice extent in September 2022 was below the median extent (median means in the middle of the range of observed ice extents) for 1991- 2020, and much lower than median ice conditions from 1981-2010. On the right, the graphic shows the steady drop in sea ice extent since 1979. Credit: NOAA Climate.gov, based on NSIDC data. A typhoon, smoke from wildfires and increasing rain are not…

By Institute of Atmospheric Physics, Chinese Academy of Sciences October 25, 2022Ａ coordinate measurement on anthropogenic CO2 emission from TanSat (China) and Sentinel-5P (Europe). Credit:Dongxu YangAn international research team has identified carbon dioxide from human activities by analyzing measurements from the TanSat mission and the Copernicus Sentinel-5 Precursor mission. This was the first attempt to use TanSat measurements to detect anthropogenic, or human-caused, carbon dioxide emission signatures. One of the…