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The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2006), and the Intergovernmental Panel on Climate Change (IPCC, 2007) that global climate has warmed and that human activities (mainly greenhouse‐gas emissions) account for most of the warming since the ...
Climate change can also be used more broadly to include changes to the climate that have happened throughout Earth's history. [32] Global warming—used as early as 1975 [33] —became the more popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate. [34] Since the 2000s, climate change has ...
Some climate change effects: wildfire caused by heat and dryness, bleached coral caused by ocean acidification and heating, environmental migration caused by desertification, and coastal flooding caused by storms and sea level rise. Effects of climate change are well documented and growing for Earth's natural environment and human societies. Changes to the climate system include an overall ...
The size of this warming is broadly consistent with predictions of climate models, but it is also of the same magnitude as natural climate variability. Thus the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have offset a still larger human-induced greenhouse warming.
The second part of the report, a contribution of working group II (WGII), was published on 28 February 2022. Entitled Climate Change 2022: Impacts, Adaptation & Vulnerability, the full report is 3675 pages, plus a 37-page summary for policymakers. [29] It contains information on the impacts of climate change on nature and human activity. [30]
22 July publication: A review conducted under the World Climate Research Programme (WCRP) projected climate sensitivity—the range of global warming to be expected from a doubling of CO 2 concentration—to be 2.6—3.9 °C (4.7—7.0 °F), narrower than longstanding (1979+) estimates of about 1.5—4.5 °C (2.7—8.1 °F).
Furthermore, climate change may disrupt the ecology among interacting species, via changes on behaviour and phenology, or via climate niche mismatch. [9] The disruption of species-species associations is a potential consequence of climate-driven movements of each individual species in opposite directions.
The "Special Report on Global Warming of 1.5 °C" (SR15) is cited by Greta Thunberg in her speeches "Wherever I Go I Seem to Be Surrounded by Fairy Tales" (United States Congress, Washington DC, 18 September 2019) and "We Are the Change and Change Is Coming" (Week For Future, Climate Strike, Montreal, 27 September 2019), both published in the ...