所有的CO2去哪里了?
贝壳生物以CaCO的形式将其储存在沉积物和岩石中3。这被称为CO的主汇2。
地球上还有其他碳汇,但岩石圈是更大的:
来源:< a href="https://gml.noaa.gov/education/info_activities/pdfs/TBI_co2_and_the_carbon_cycle.pdf" rel="nofollow noreferrer">NOAA
光合作用是水+ CO2转化为O2和糖。在这种情况下,糖主要是纤维素。石炭纪发生了什么?木质素结合的大量纤维素(木材)进化了,但几乎没有东西可以消化它,导致埋葬的可能性比今天大得多。与此同时,盘古大陆的造山特征使泥炭和沼泽的掩埋成为一个连续的过程。碳被埋,氧被释放。这就是氧气本身的来源。
<强>你不需要CO2生产来获得氧气损失。氧水平自然下降,因为它很好,氧化物质,主要是风化的矿物和火山。 There needs to be a continuous production of new oxygen to replace that. Today this effect is minimal but the continuous evolution of things that can live on land, and in dryer and dryer places would have noticeably increased this as weathering compared to today. Modern sediment source rock is much more oxidized as a whole that is why today the exchange of CO2 and oxygen biotically has a bigger effect. How much sediment is reworked stuff that is already oxidized increases over time but it is still fairly low at the time. The carbon/oxygen cycle is much more complex than just the two exchanging with each other.
https://www.nsf.gov/news/news_summ.jsp?cntn_id=124570
https://www.sciencedirect.com/science/article/pii/S0009254120302047