更改

[[File:Rock cycle nps.PNG|thumb|upright=2.25|right| {{center|The slow cycle operates through rocks, including volcanic and tectonic activity}}]]

[[File:Rock cycle nps.PNG|thumb|upright=2.25|right|慢循环作用于岩石，包括火山和构造活动]]

慢速循环如右上图所示，它涉及到岩石循环中的中长期地球化学过程。海洋和大气之间的交换可能需要几个世纪，而岩石的风化可能需要数百万年。海洋中的碳沉积在海底，在那里形成沉积岩并潜入地幔。造山运动使得这种地质碳回到地表。在地表，岩石被风化，碳通过脱气作用返回大气，通过河流返回海洋。其它的地质碳通过含钙离子热液的排放回到海洋。在一年中，有一千万至一亿吨的碳在这个缓慢的循环中移动。这包括火山将地质碳以二氧化碳的形式直接返还大气。然而，这还不足燃烧化石燃料排放到大气中的二氧化碳的百分之一。<ref name=Libes2015 /><ref name="Bush2020">{{cite book|doi = 10.1007/978-3-030-15424-0_3|url = https://books.google.com/books?id=h_60DwAAQBAJ&q=%22Climate+Change+and+Renewable+Energy%22+%22The+Carbon+Cycle%22chapter+%3D+The+Carbon+Cycle&pg=PA109|title = Climate Change and Renewable Energy|year = 2020|last1 = Bush|first1 = Martin J.|pages = 109–141|isbn = 978-3-030-15423-3|access-date = 2021-09-27|archive-date = 2021-09-27|archive-url = https://web.archive.org/web/20210927001642/https://books.google.com/books?id=h_60DwAAQBAJ&q=%22Climate+Change+and+Renewable+Energy%22+%22The+Carbon+Cycle%22chapter+%3D+The+Carbon+Cycle&pg=PA109|url-status = live}}</ref>

慢速循环如右上图所示，它涉及到岩石循环中的中长期地球化学过程。海洋和大气之间的交换可能需要几个世纪，而岩石的风化可能需要数百万年。海洋中的碳沉积在海底，在那里形成沉积岩并潜入地幔。造山运动使得这种地质碳回到地表。在地表，岩石被风化，碳通过脱气作用返回大气，通过河流返回海洋。其它的地质碳通过含钙离子热液的排放回到海洋。在一年中，有一千万至一亿吨的碳在这个缓慢的循环中移动。这包括火山将地质碳以二氧化碳的形式直接返还大气。然而，这还不足燃烧化石燃料排放到大气中的二氧化碳的百分之一。<ref name=Libes2015 /><ref name="Bush2020">{{cite book|doi = 10.1007/978-3-030-15424-0_3|url = https://books.google.com/books?id=h_60DwAAQBAJ&q=%22Climate+Change+and+Renewable+Energy%22+%22The+Carbon+Cycle%22chapter+%3D+The+Carbon+Cycle&pg=PA109|title = Climate Change and Renewable Energy|year = 2020|last1 = Bush|first1 = Martin J.|pages = 109–141|isbn = 978-3-030-15423-3|access-date = 2021-09-27|archive-date = 2021-09-27|archive-url = https://web.archive.org/web/20210927001642/https://books.google.com/books?id=h_60DwAAQBAJ&q=%22Climate+Change+and+Renewable+Energy%22+%22The+Carbon+Cycle%22chapter+%3D+The+Carbon+Cycle&pg=PA109|url-status = live}}</ref>

==深层循环==

==深层循环==