|
''Pa los efectos climáticos actuales y futuros de la influencia humana, vease [[Calentamientu global|Calentamientu global.]] Pal estudiu de cambeos climáticos pasaos, vease Paleoclimatología.''
[[Ficheru:Venus_globe.jpg|miniaturadeimagen|333x333px|Imaxe actual de la superficie de [[Venus (planeta)|Venus]], un planeta qu'enantes se paeció en munchos aspeutos a la Tierra actual.<ref>[http://www.que.es/ultimas-noticias/sociedad/200907141340-venus-parecia-tierra.html «Venus se parecía mucho a la Tierra.» 14 de xunetu de 2009.] ''Qué''. Consultáu'l 29 de xunetu de 2009.</ref>]]
El '''cambéu climáticu''' ye un cambéu na distribución estadística de #ellos patrones meteorolóxicos mientres un periodu enllargáu de [[Tiempu atmosféricu|tiempu]] (décades a millones d'años). Puede referise a un cambéu en #condicionar promediu del tiempu o na variación temporal meteorolóxica de #condicionar promediu al llargu plazu (por casu, más o menos fenómenos meteorolóxicos estremos). Ta causáu por factores como procesos bióticos, variaciones na radiación solar recibida pola Tierra, [[tectónica de plaques]] y erupciones volcániques. Tamién s'identificaron ciertes actividaes humanes como causa principal del cambéu climáticu recién, de cutiu llamáu ''[[calentamientu global]]''.<ref>America's Climate Choices: Panel on Advancing the Science of Climate Change; National Research Council (2010). [http://www.nap.edu/catalog.php?record_id=12782 ''Advancing the Science of Climate Change'']. Washington, D.C.: The National Academies Press. <small>[//es.wikipedia.org/wiki/ISBN ISBN] [//es.wikipedia.org/wiki/Especial:FuentesDeLibros/0-309-14588-0 0-309-14588-0]</small>. «(p1) ... there is a strong, credible body of evidence, based on multiple lines of research, documenting that climate is changing and that these changes are in large part caused by human activities. While much remains to be learned, the core phenomenon, scientific questions, and hypotheses have been examined thoroughly and have stood firm in the face of serious scientific debate and careful evaluation of alternative explanations. * * * (pp. 21-22) Some scientific conclusions or theories have been so thoroughly examined and tested, and supported by so many independent observations and results, that their likelihood of subsequently being found to be wrong is vanishingly small. Such conclusions and theories are then regarded as settled facts. This is the case for the conclusions that the Earth system is warming and that much of this warming is very likely due to human activities.»{{cita llibru |editorial=The National Academies Press|isbn=0-309-14588-0 |apellíu=America's Climate Choices: Panel on Advancing the Science of Climate Change; National Research Council |títulu=Advancing the Science of Climate Change|ubicación=Washington, D.C.|año=2010|url=http://www.nap.edu/catalog.php?record_id=12782|cita=(p1) ... there is a strong, credible body of evidence, based on multiple lines of research, documenting that climate is changing and that these changes are in large part caused by human activities. While much remains to be learned, the core phenomenon, scientific questions, and hypotheses have been examined thoroughly and have stood firm in the face of serious scientific debate and careful evaluation of alternative explanations. * * * (pp. 21-22) Some scientific conclusions or theories have been so thoroughly examined and tested, and supported by so many independent observations and results, that their likelihood of subsequently being found to be wrong is vanishingly small. Such conclusions and theories are then regarded as settled facts. This is the case for the conclusions that the Earth system is warming and that much of this warming is very likely due to human activities.}}</ref>
Los científicos trabayen viviegamente pa entender el clima pasáu y futuru por aciu observaciones y modelos teóricos. Arrexuntóse un rexistru [[Clima|climáticu]], que s'estiende fondamente nel pasáu de la Tierra y sigue construyéndose, basáu na evidencia xeolóxica a partir de perfiles térmicos de perforaciones, núcleos removíos de fondes acumuladures de xelu, rexistru de la [[flora]] y [[fauna]], procesos glaciares y peri glaciares, isótopos estables y otros analises de les capes de sedimentu y rexistros de los niveles del mar del pasáu. El rexistru instrumental aprove de datos más recién. Los modelos de circulación xeneral, sofitaos poles ciencies físiques, úsense de cutiu nos enfoques teóricos pa corresponder a los datos del clima pasáu, realizar proyecciones futures y acomuñar les causes y efectos del cambéu climáticu.
|
