Circk, Had you read the paper you would have found that there are many systems which buffer the CO2. Again you only see what you want and discard that which removes you from having even one valid point.
The paper clearly shows that the speed of buffering will offset and maintain the PH within a very narrow margin..
SO not only is it not a problem for the atmosphere it is not a problem for the oceans... I wonder what will be the next big lie and emergency demanding we deprive ourselves of cheep reliable energy? I'm sure the left wit control mongers will lie up something new...
Bullshit.
Past constraints on the vulnerability of marine calcifiers to massive carbon dioxide release Abstract Nature Geoscience
Past constraints on the vulnerability of marine calcifiers to massive carbon dioxide release
Andy Ridgwell
1 & Daniela N. Schmidt
2
Increasing concentrations of carbon dioxide in sea water are driving a progressive acidification of the ocean
1. Although the associated changes in the carbonate chemistry of surface and deep waters may adversely affect marine calcifying organisms
2, 3, 4, current experiments do not always produce consistent results for a given species
5. Ocean sediments record past biological responses to transient greenhouse warming and ocean acidification. During the Palaeocene–Eocene thermal maximum, for example, the biodiversity of benthic calcifying organisms decreased markedly
6, 7, whereas extinctions of surface dwellers were very limited
8, 9. Here we use the Earth system model GENIE-1 to simulate and compare directly past and present environmental changes in the marine realm. In our simulation of future ocean conditions, we find an undersaturation with respect to carbonate in the deep ocean that exceeds that experienced during the Palaeocene–Eocene thermal maximum and could endanger calcifying organisms. Furthermore, our simulations show higher rates of environmental change at the surface for the future than the Palaeocene–Eocene thermal maximum, which could potentially challenge the ability of plankton to adapt.
Projecting Coral Reef Futures Under Global Warming and Ocean Acidification
Projecting Coral Reef Futures Under Global Warming and Ocean Acidification
- John M. Pandolfi1,2,*,
- Sean R. Connolly3,
- Dustin J. Marshall2,
- Anne L. Cohen4
+Author Affiliations
- ↵*To whom correspondence should be addressed. E-mail: j.pandolfi@uq.edu.au
Many physiological responses in present-day coral reefs to climate change are interpreted as consistent with the imminent disappearance of modern reefs globally because of annual mass bleaching events, carbonate dissolution, and insufficient time for substantial evolutionary responses. Emerging evidence for variability in the coral calcification response to acidification, geographical variation in bleaching susceptibility and recovery, responses to past climate change, and potential rates of adaptation to rapid warming supports an alternative scenario in which reef degradation occurs with greater temporal and spatial heterogeneity than current projections suggest. Reducing uncertainty in projecting coral reef futures requires improved understanding of past responses to rapid climate change; physiological responses to interacting factors, such as temperature, acidification, and nutrients; and the costs and constraints imposed by acclimation and adaptation.
Shelf and open-ocean calcareous phytoplankton assemblages across the Paleocene-Eocene Thermal Maximum Implications for global productivity gradients
Shelf and open-ocean calcareous phytoplankton assemblages across the Paleocene-Eocene Thermal Maximum: Implications for global productivity gradients
- Samantha J. Gibbs*1,
- Timothy J. Bralower1,
- Paul R. Bown2,
- James C. Zachos3and
- Laurel M. Bybell4
+Author Affiliations
- 1Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA
- 2Department of Earth Sciences, University College London, London WC1E 6BT, UK
- 3Earth Science Department, University of California–Santa Cruz, Santa Cruz, California 95064, USA
- 4U.S. Geological Survey, 926 National Center, Reston, Virginia 20192, USA
Abstract
Abrupt global warming and profound perturbation of the carbon cycle during the Paleocene-Eocene Thermal Maximum (PETM, ca. 55 Ma) have been linked to a massive release of carbon into the ocean-atmosphere system. Increased phytoplankton productivity has been invoked to cause subsequent CO2 drawdown, cooling, and environmental recovery. However, interpretations of geochemical and biotic data differ on when and where this increased productivity occurred. Here we present high-resolution nannofossil assemblage data from a shelf section (the U.S. Geological Survey [USGS] drill hole at Wilson Lake, New Jersey) and an open-ocean location (Ocean Drilling Program [ODP] Site 1209, paleoequatorial Pacific). These data combined with published biotic records indicate a transient steepening of shelf-offshelf trophic gradients across the PETM onset and peak, with a decrease in open-ocean productivity coeval with increased nutrient availability in shelf areas. Productivity levels recovered in the open ocean during the later stages of the event, which, coupled with intensified continental weathering rates, may have played an important role in carbon sequestration and CO2 drawdown.
Enhanced terrestrial weathering runoff and surface ocean carbonate production during the recovery stages of the Paleocene-Eocene thermal maximum - Kelly - 2005 - Paleoceanography - Wiley Online Library
Enhanced terrestrial weathering/runoff and surface ocean carbonate production during the recovery stages of the Paleocene-Eocene thermal maximum
- D. Clay Kelly1,
- James C. Zachos2,
- Timothy J. Bralower3 and
- Stephen A. Schellenberg4
Article first published online: 17 DEC 2005
DOI: 10.1029/2005PA001163
Copyright 2005 by the American Geophysical Union.
Abstract
[1] The carbonate saturation profile of the oceans shoaled markedly during a transient global warming event known as the Paleocene-Eocene thermal maximum (PETM) (circa 55 Ma). The rapid release of large quantities of carbon into the ocean-atmosphere system is believed to have triggered this intense episode of dissolution along with a negative carbon isotope excursion (CIE). The brevity (120–220 kyr) of the PETM reflects the rapid enhancement of negative feedback mechanisms within Earth's exogenic carbon cycle that served the dual function of buffering ocean pH and reducing atmospheric greenhouse gas levels. Detailed study of the PETM stratigraphy from Ocean Drilling Program Site 690 (Weddell Sea) reveals that the CIE recovery period, which postdates the CIE onset by ∼80 kyr, is represented by an expanded (∼2.5 m thick) interval containing a unique planktic foraminiferal assemblage strongly diluted by coccolithophore carbonate. Collectively, the micropaleontological and sedimentological changes preserved within the CIE recovery interval reflect a transient state when ocean-atmosphere chemistry fostered prolific coccolithophore blooms that suppressed the local lysocline to relatively deeper depths. A prominent peak in the abundance of the clay mineral kaolinite is associated with the CIE recovery interval, indicating that continental weathering/runoff intensified at this time as well (Robert and Kennett, 1994). Such parallel stratigraphic changes are generally consonant with the hypothesis that enhanced continental weathering/runoff and carbonate precipitation helped sequester carbon during the PETM recovery period (e.g., Dickens et al., 1997; Zachos et al., 2005).