Carbonate system data on the Molokai reef flat
The severity of the impact of elevated atmospheric pCO2 to coral reef ecosystems depends, in part, on how seawater pCO2 affects the balance between calcification and dissolution of carbonate sediments. Presently, there are insufficient published data that relate concentrations of pCO2 and CO3**2- to...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743388 2023-05-15T17:51:11+02:00 Carbonate system data on the Molokai reef flat Yates, Kimberly Kaye Halley, Roberet B MEDIAN LATITUDE: 21.076140 * MEDIAN LONGITUDE: -156.997533 * SOUTH-BOUND LATITUDE: 21.074210 * WEST-BOUND LONGITUDE: -157.000000 * NORTH-BOUND LATITUDE: 21.080000 * EAST-BOUND LONGITUDE: -156.996300 * DATE/TIME START: 2000-02-09T03:00:00 * DATE/TIME END: 2003-06-19T08:03:00 2006-07-26 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.743388 https://doi.org/10.1594/PANGAEA.743388 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.743388 https://doi.org/10.1594/PANGAEA.743388 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Yates, Kimberly Kaye; Halley, Roberet B (2006): CO3**2- concentration and pCO2 thresholds for calcification and dissolution on the Molokai reef flat, Hawaii. Biogeosciences, 3, 357-369, https://doi.org/10.5194/bg-3-357-2006 Benthos Calcification/Dissolution Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Field experiment Hawaiian Arch Mesocosm or benthocosm Molokai_reef North Pacific OA-ICC OCE Ocean Acidification International Coordination Centre Oceanography Rocky-shore community Tropical Water sample WS YH_06 Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.743388 https://doi.org/10.5194/bg-3-357-2006 2023-01-20T07:31:51Z The severity of the impact of elevated atmospheric pCO2 to coral reef ecosystems depends, in part, on how seawater pCO2 affects the balance between calcification and dissolution of carbonate sediments. Presently, there are insufficient published data that relate concentrations of pCO2 and CO3**2- to in situ rates of reef calcification in natural settings to accurately predict the impact of elevated atmospheric pCO2 on calcification and dissolution processes. Rates of net calcification and dissolution, CO3**2- concentrations, and pCO2 were measured, in situ, on patch reefs, bare sand, and coral rubble on the Molokai reef flat in Hawaii. Rates of calcification ranged from 0.03 to 2.30 mmol CaCO3/m**2/h and dissolution ranged from -0.05 to -3.3 mmol CaCO3/m**2/h. Calcification and dissolution varied diurnally with net calcification primarily occurring during the day and net dissolution occurring at night. These data were used to calculate threshold values for pCO2 and CO3**2- at which rates of calcification and dissolution are equivalent. Results indicate that calcification and dissolution are linearly correlated with both CO3**2- and pCO2. Threshold pCO2 and CO3**2- values for individual substrate types showed considerable variation. The average pCO2 threshold value for all substrate types was 654±195 µatm and ranged from 467 to 1003 µatm. The average CO3**2- threshold value was 152±24 µmol/kg, ranging from 113 to 184 µmol/kg. Ambient seawater measurements of pCO2 and CO3**2- indicate that CO3**2- and pCO2 threshold values for all substrate types were both exceeded, simultaneously, 13% of the time at present day atmospheric pCO2 concentrations. It is predicted that atmospheric pCO2 will exceed the average pCO2 threshold value for calcification and dissolution on the Molokai reef flat by the year 2100. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-157.000000,-156.996300,21.080000,21.074210) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Benthos Calcification/Dissolution Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Field experiment Hawaiian Arch Mesocosm or benthocosm Molokai_reef North Pacific OA-ICC OCE Ocean Acidification International Coordination Centre Oceanography Rocky-shore community Tropical Water sample WS YH_06 |
spellingShingle |
Benthos Calcification/Dissolution Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Field experiment Hawaiian Arch Mesocosm or benthocosm Molokai_reef North Pacific OA-ICC OCE Ocean Acidification International Coordination Centre Oceanography Rocky-shore community Tropical Water sample WS YH_06 Yates, Kimberly Kaye Halley, Roberet B Carbonate system data on the Molokai reef flat |
topic_facet |
Benthos Calcification/Dissolution Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Field experiment Hawaiian Arch Mesocosm or benthocosm Molokai_reef North Pacific OA-ICC OCE Ocean Acidification International Coordination Centre Oceanography Rocky-shore community Tropical Water sample WS YH_06 |
description |
The severity of the impact of elevated atmospheric pCO2 to coral reef ecosystems depends, in part, on how seawater pCO2 affects the balance between calcification and dissolution of carbonate sediments. Presently, there are insufficient published data that relate concentrations of pCO2 and CO3**2- to in situ rates of reef calcification in natural settings to accurately predict the impact of elevated atmospheric pCO2 on calcification and dissolution processes. Rates of net calcification and dissolution, CO3**2- concentrations, and pCO2 were measured, in situ, on patch reefs, bare sand, and coral rubble on the Molokai reef flat in Hawaii. Rates of calcification ranged from 0.03 to 2.30 mmol CaCO3/m**2/h and dissolution ranged from -0.05 to -3.3 mmol CaCO3/m**2/h. Calcification and dissolution varied diurnally with net calcification primarily occurring during the day and net dissolution occurring at night. These data were used to calculate threshold values for pCO2 and CO3**2- at which rates of calcification and dissolution are equivalent. Results indicate that calcification and dissolution are linearly correlated with both CO3**2- and pCO2. Threshold pCO2 and CO3**2- values for individual substrate types showed considerable variation. The average pCO2 threshold value for all substrate types was 654±195 µatm and ranged from 467 to 1003 µatm. The average CO3**2- threshold value was 152±24 µmol/kg, ranging from 113 to 184 µmol/kg. Ambient seawater measurements of pCO2 and CO3**2- indicate that CO3**2- and pCO2 threshold values for all substrate types were both exceeded, simultaneously, 13% of the time at present day atmospheric pCO2 concentrations. It is predicted that atmospheric pCO2 will exceed the average pCO2 threshold value for calcification and dissolution on the Molokai reef flat by the year 2100. |
format |
Dataset |
author |
Yates, Kimberly Kaye Halley, Roberet B |
author_facet |
Yates, Kimberly Kaye Halley, Roberet B |
author_sort |
Yates, Kimberly Kaye |
title |
Carbonate system data on the Molokai reef flat |
title_short |
Carbonate system data on the Molokai reef flat |
title_full |
Carbonate system data on the Molokai reef flat |
title_fullStr |
Carbonate system data on the Molokai reef flat |
title_full_unstemmed |
Carbonate system data on the Molokai reef flat |
title_sort |
carbonate system data on the molokai reef flat |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.743388 https://doi.org/10.1594/PANGAEA.743388 |
op_coverage |
MEDIAN LATITUDE: 21.076140 * MEDIAN LONGITUDE: -156.997533 * SOUTH-BOUND LATITUDE: 21.074210 * WEST-BOUND LONGITUDE: -157.000000 * NORTH-BOUND LATITUDE: 21.080000 * EAST-BOUND LONGITUDE: -156.996300 * DATE/TIME START: 2000-02-09T03:00:00 * DATE/TIME END: 2003-06-19T08:03:00 |
long_lat |
ENVELOPE(-157.000000,-156.996300,21.080000,21.074210) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Supplement to: Yates, Kimberly Kaye; Halley, Roberet B (2006): CO3**2- concentration and pCO2 thresholds for calcification and dissolution on the Molokai reef flat, Hawaii. Biogeosciences, 3, 357-369, https://doi.org/10.5194/bg-3-357-2006 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.743388 https://doi.org/10.1594/PANGAEA.743388 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.743388 https://doi.org/10.5194/bg-3-357-2006 |
_version_ |
1766158254926200832 |