Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison
Ocean acidification due to anthropogenic CO2 emission reduces ocean pH and carbonate saturation, with the projection that marine calcifiers and associated ecosystems will be negatively affected in the future. On longer time scale, however, recent studies of deep-sea carbonate sediments suggest signi...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://repository.hkust.edu.hk/ir/Record/1783.1-132379 https://doi.org/10.1029/2022GB007541 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000997411900001 |
id |
ftunivsthongkong:oai:repository.hkust.edu.hk:1783.1-132379 |
---|---|
record_format |
openpolar |
spelling |
ftunivsthongkong:oai:repository.hkust.edu.hk:1783.1-132379 2023-12-31T10:21:36+01:00 Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison Si, Weimin Herbert, Timothy Wu, Mengxi Rosenthal, Yair 2023 https://repository.hkust.edu.hk/ir/Record/1783.1-132379 https://doi.org/10.1029/2022GB007541 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000997411900001 English eng https://repository.hkust.edu.hk/ir/Record/1783.1-132379 Global Biogeochemical Cycles, v. 37, (6), June 2023, article number e2022GB007541 0886-6236 1944-9224 https://doi.org/10.1029/2022GB007541 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000997411900001 Article 2023 ftunivsthongkong https://doi.org/10.1029/2022GB007541 2023-12-01T01:13:33Z Ocean acidification due to anthropogenic CO2 emission reduces ocean pH and carbonate saturation, with the projection that marine calcifiers and associated ecosystems will be negatively affected in the future. On longer time scale, however, recent studies of deep-sea carbonate sediments suggest significantly increased carbonate production and burial in the open ocean during the warm Middle Miocene. Here, we present new model simulations in comparison to published Miocene carbonate accumulation rates to show that global biogenic carbonate production in the pelagic environment was approximately doubled relative to present-day values when elevated atmospheric pCO2 led to substantial global warming ∼13–15 million years ago. Our analysis also finds that although high carbonate production was associated with high dissolution in the deep-sea, net pelagic carbonate burial was approximately 30%–45% higher than modern. At the steady state of the long-term carbon cycle, this requires an equivalent increase in riverine carbonate alkalinity influx during the Middle Miocene, attributable to enhanced chemical weathering under a warmer climate. Elevated biogenic carbonate production resulted in a Miocene ocean that had carbon (dissolved inorganic carbon) and alkalinity (total alkalinity) inventories similar to modern values but was poorly buffered and less saturated in both the surface and the deep ocean relative to modern. Article in Journal/Newspaper Ocean acidification The Hong Kong University of Science and Technology: HKUST Institutional Repository Global Biogeochemical Cycles 37 6 |
institution |
Open Polar |
collection |
The Hong Kong University of Science and Technology: HKUST Institutional Repository |
op_collection_id |
ftunivsthongkong |
language |
English |
description |
Ocean acidification due to anthropogenic CO2 emission reduces ocean pH and carbonate saturation, with the projection that marine calcifiers and associated ecosystems will be negatively affected in the future. On longer time scale, however, recent studies of deep-sea carbonate sediments suggest significantly increased carbonate production and burial in the open ocean during the warm Middle Miocene. Here, we present new model simulations in comparison to published Miocene carbonate accumulation rates to show that global biogenic carbonate production in the pelagic environment was approximately doubled relative to present-day values when elevated atmospheric pCO2 led to substantial global warming ∼13–15 million years ago. Our analysis also finds that although high carbonate production was associated with high dissolution in the deep-sea, net pelagic carbonate burial was approximately 30%–45% higher than modern. At the steady state of the long-term carbon cycle, this requires an equivalent increase in riverine carbonate alkalinity influx during the Middle Miocene, attributable to enhanced chemical weathering under a warmer climate. Elevated biogenic carbonate production resulted in a Miocene ocean that had carbon (dissolved inorganic carbon) and alkalinity (total alkalinity) inventories similar to modern values but was poorly buffered and less saturated in both the surface and the deep ocean relative to modern. |
format |
Article in Journal/Newspaper |
author |
Si, Weimin Herbert, Timothy Wu, Mengxi Rosenthal, Yair |
spellingShingle |
Si, Weimin Herbert, Timothy Wu, Mengxi Rosenthal, Yair Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison |
author_facet |
Si, Weimin Herbert, Timothy Wu, Mengxi Rosenthal, Yair |
author_sort |
Si, Weimin |
title |
Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison |
title_short |
Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison |
title_full |
Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison |
title_fullStr |
Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison |
title_full_unstemmed |
Increased biogenic calcification and burial under elevated pCO 2 during the Miocene: A model-data comparison |
title_sort |
increased biogenic calcification and burial under elevated pco 2 during the miocene: a model-data comparison |
publishDate |
2023 |
url |
https://repository.hkust.edu.hk/ir/Record/1783.1-132379 https://doi.org/10.1029/2022GB007541 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000997411900001 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://repository.hkust.edu.hk/ir/Record/1783.1-132379 Global Biogeochemical Cycles, v. 37, (6), June 2023, article number e2022GB007541 0886-6236 1944-9224 https://doi.org/10.1029/2022GB007541 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000997411900001 |
op_doi |
https://doi.org/10.1029/2022GB007541 |
container_title |
Global Biogeochemical Cycles |
container_volume |
37 |
container_issue |
6 |
_version_ |
1786832453797675008 |