因此,在“寒冷期”,大气中的CO2浓度快速下降,净初级生产量也跟着快速下降,从而导致了生物大灭绝;在“温室气候期”,大气中的CO2浓度快速上升,净初级生产量也跟着快速上升,从而导致了生物大爆发。 关键词 恐龙灭绝说;CO2;净初级生产量;生态位;生物大灭绝;生物大爆发 Drastic changes in atmospheric CO2 concentration ...
(1961), the observation that the porous spaces in natural ice contain samples of ancient air, the study of ice cores for potential insights into the history of the atmospheric CO 2 concentration has received great attention from scientists interested in the reconstruction of environmental parameters....
Global atmospheric concentration of carbon dioxide by decade 1880-2018 Published by Ian Tiseo, Feb 6, 2023 This statistic represents the average level of carbon dioxide in the atmosphere worldwide between the 1880s and 2018. In 2015, the level of CO2 in the atmosphere surpassed 400 parts ...
[1]We report a decadally resolved record of atmospheric CO2concentration for the last 1000 years, obtained from the West Antarctic Ice Sheet (WAIS) Divide shallow ice core. The most prominent feature of the pre-industrial period is a rapid ∼7 ppm decrease of CO2in a span of ∼20–50...
Morimoto, S., Nakazawa, T., Aoki, S., Hashida, G., and Yamanouchi, T.: Concentration variations of atmospheric CO2 observed at Syowa Station, Antarctica from 1984 to 2000, Tellus, 55B, 170-177, doi:10.1034/j.1600-0889.2003.01471.x, 2003....
The history of atmospheric carbon dioxide on Earth began with the release of the gas from beneath the surface of the newly formed planet. The concentration of pCO2 remained extremely high from Precambrian times to at least the Devonian Period, perpetuated by the release of extremely large amounts...
TheimpactofatmosphericCO2concentrationenrichmenton.doc,The impact of atmospheric CO2 concentration enrichment on rice quality —A research review Wang Yunxiaa, Michael Freib, Song Qilinga ,Yang Lianxina,* a Key Laboratory of Crop Genetics Physiology of J
Interaction between atmospheric CO2 concentration and water deficit on gas exchange and crop growth: testing of ecosys with data from the Free Air CO2 Enri... Soil water deficits are likely to influence the response of crop growth and yield to changes in atmospheric CO 2 concentrations (C a )...
Halperin Ari, 2015. Simple Equation of Multi-Decadal Atmospheric Carbon Concentration Change, defyccc.com,defyccc.com/se Article’s History Originally published on November 24, 2015. The article is archived atwww.webcitation.org/6dJdf6BpL ...
Photosynthesis by the vegetation of the pasture is the main sink for atmospheric CO2 during daylight. During nighttime soil and plant respiration are a source for atmospheric CO2. Our results show a marked diurnal cycle of mean CO2 mixing ratios. Mean mixing ratios above 500 ppmv are reached ...