Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6
Surface waters of the modern Western Tropical Pacific (WTP) are in equilibrium with atmospheric CO2. However, air-sea exchange of CO2 in this region may have been modulated in the past by oceanic-atmospheric fluctuations in the tropical Pacific such as the East Asian monsoon and the El Nino-Southern...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Format: | Report |
Language: | English |
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Online Access: | http://ir.qdio.ac.cn/handle/337002/180252 https://doi.org/10.1016/j.palaeo.2022.111267 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/180252 2023-05-15T13:50:10+02:00 Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 Guo, Jingteng Qiu, Xiaohua Algeo, Thomas J. Li, Tiegang Xiong, Zhifang Zhao, Debo Dang, Haowen Qiao, Peijun Qin, Bingbin Jia, Qi 2022-12-01 http://ir.qdio.ac.cn/handle/337002/180252 https://doi.org/10.1016/j.palaeo.2022.111267 英语 eng ELSEVIER PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://ir.qdio.ac.cn/handle/337002/180252 doi:10.1016/j.palaeo.2022.111267 Planktic foraminifera B/Ca El Nino-Southern Oscillation Productivity Thermocline Precession Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary CARBONATE ION CONCENTRATIONS BENTHIC FORAMINIFERAL B/CA WATER TEMPERATURE-CHANGES EQUATORIAL PACIFIC EL-NINO PLANKTONIC-FORAMINIFERA SOUTHERN-OCEAN INTERGLACIAL CHANGES ISOTOPIC COMPOSITION SURFACE TEMPERATURE 期刊论文 2022 ftchinacasciocas https://doi.org/10.1016/j.palaeo.2022.111267 2023-01-16T16:14:20Z Surface waters of the modern Western Tropical Pacific (WTP) are in equilibrium with atmospheric CO2. However, air-sea exchange of CO2 in this region may have been modulated in the past by oceanic-atmospheric fluctuations in the tropical Pacific such as the East Asian monsoon and the El Nino-Southern Oscillation (ENSO) and extratropical mode waters such as Antarctic Intermediate Water. Thus, understanding controls on the sea-surface carbonate system in the WTP is important for forecasting future carbon-cycle changes in this region. Here, we reconstruct sea-surface pH and pCO(2) since Marine Isotope Stage 6 (MIS 6; 155 ka) based on B/ Ca ratios of the planktic foraminifer Globigerinoides ruber (white) in sediment Core MD06-3052 from the western Philippine Sea, and we then calculate the difference between oceanic and atmospheric pCO(2) (Delta pCO(2()(sw-)(atm)())) in order to evaluate the history of air-sea CO2 exchange. Delta pCO(2()(sw-)(atm)()) changes were strongly modulated by the similar to 20-kyr precession cycle. The results of cross-spectral analysis demonstrate a close connection between the East Asian summer monsoon (EASM) and air-sea CO2 exchange since MIS 6, demonstrating that precession-driven EASM can affect air-sea CO2 exchange through regulation of surface productivity and thermocline depth. In contrast, the East Asian winter monsoon (EAWM) and ENSO-like conditions are not major influences on air-sea CO2 exchange in the study area at precession-band frequencies. In addition, enhanced upwelling of Southern Ocean-sourced deepwater rich in dissolved inorganic carbon (DIC) affected the upper water column during transitions from cold to warm stages (i.e., deglaciations). In conclusion, these findings suggest that orbital precession influences can affect oceanic conditions not only through climate change and biological processes but also through sea-surface carbonate chemistry. Report Antarc* Antarctic Planktonic foraminifera Southern Ocean Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Antarctic Southern Ocean Pacific Palaeogeography, Palaeoclimatology, Palaeoecology 607 111267 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Planktic foraminifera B/Ca El Nino-Southern Oscillation Productivity Thermocline Precession Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary CARBONATE ION CONCENTRATIONS BENTHIC FORAMINIFERAL B/CA WATER TEMPERATURE-CHANGES EQUATORIAL PACIFIC EL-NINO PLANKTONIC-FORAMINIFERA SOUTHERN-OCEAN INTERGLACIAL CHANGES ISOTOPIC COMPOSITION SURFACE TEMPERATURE |
spellingShingle |
Planktic foraminifera B/Ca El Nino-Southern Oscillation Productivity Thermocline Precession Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary CARBONATE ION CONCENTRATIONS BENTHIC FORAMINIFERAL B/CA WATER TEMPERATURE-CHANGES EQUATORIAL PACIFIC EL-NINO PLANKTONIC-FORAMINIFERA SOUTHERN-OCEAN INTERGLACIAL CHANGES ISOTOPIC COMPOSITION SURFACE TEMPERATURE Guo, Jingteng Qiu, Xiaohua Algeo, Thomas J. Li, Tiegang Xiong, Zhifang Zhao, Debo Dang, Haowen Qiao, Peijun Qin, Bingbin Jia, Qi Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 |
topic_facet |
Planktic foraminifera B/Ca El Nino-Southern Oscillation Productivity Thermocline Precession Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary CARBONATE ION CONCENTRATIONS BENTHIC FORAMINIFERAL B/CA WATER TEMPERATURE-CHANGES EQUATORIAL PACIFIC EL-NINO PLANKTONIC-FORAMINIFERA SOUTHERN-OCEAN INTERGLACIAL CHANGES ISOTOPIC COMPOSITION SURFACE TEMPERATURE |
description |
Surface waters of the modern Western Tropical Pacific (WTP) are in equilibrium with atmospheric CO2. However, air-sea exchange of CO2 in this region may have been modulated in the past by oceanic-atmospheric fluctuations in the tropical Pacific such as the East Asian monsoon and the El Nino-Southern Oscillation (ENSO) and extratropical mode waters such as Antarctic Intermediate Water. Thus, understanding controls on the sea-surface carbonate system in the WTP is important for forecasting future carbon-cycle changes in this region. Here, we reconstruct sea-surface pH and pCO(2) since Marine Isotope Stage 6 (MIS 6; 155 ka) based on B/ Ca ratios of the planktic foraminifer Globigerinoides ruber (white) in sediment Core MD06-3052 from the western Philippine Sea, and we then calculate the difference between oceanic and atmospheric pCO(2) (Delta pCO(2()(sw-)(atm)())) in order to evaluate the history of air-sea CO2 exchange. Delta pCO(2()(sw-)(atm)()) changes were strongly modulated by the similar to 20-kyr precession cycle. The results of cross-spectral analysis demonstrate a close connection between the East Asian summer monsoon (EASM) and air-sea CO2 exchange since MIS 6, demonstrating that precession-driven EASM can affect air-sea CO2 exchange through regulation of surface productivity and thermocline depth. In contrast, the East Asian winter monsoon (EAWM) and ENSO-like conditions are not major influences on air-sea CO2 exchange in the study area at precession-band frequencies. In addition, enhanced upwelling of Southern Ocean-sourced deepwater rich in dissolved inorganic carbon (DIC) affected the upper water column during transitions from cold to warm stages (i.e., deglaciations). In conclusion, these findings suggest that orbital precession influences can affect oceanic conditions not only through climate change and biological processes but also through sea-surface carbonate chemistry. |
format |
Report |
author |
Guo, Jingteng Qiu, Xiaohua Algeo, Thomas J. Li, Tiegang Xiong, Zhifang Zhao, Debo Dang, Haowen Qiao, Peijun Qin, Bingbin Jia, Qi |
author_facet |
Guo, Jingteng Qiu, Xiaohua Algeo, Thomas J. Li, Tiegang Xiong, Zhifang Zhao, Debo Dang, Haowen Qiao, Peijun Qin, Bingbin Jia, Qi |
author_sort |
Guo, Jingteng |
title |
Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 |
title_short |
Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 |
title_full |
Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 |
title_fullStr |
Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 |
title_full_unstemmed |
Precession-driven changes in air-sea CO2 exchange by East Asian summer monsoon in the Western Tropical Pacific since MIS 6 |
title_sort |
precession-driven changes in air-sea co2 exchange by east asian summer monsoon in the western tropical pacific since mis 6 |
publisher |
ELSEVIER |
publishDate |
2022 |
url |
http://ir.qdio.ac.cn/handle/337002/180252 https://doi.org/10.1016/j.palaeo.2022.111267 |
geographic |
Antarctic Southern Ocean Pacific |
geographic_facet |
Antarctic Southern Ocean Pacific |
genre |
Antarc* Antarctic Planktonic foraminifera Southern Ocean |
genre_facet |
Antarc* Antarctic Planktonic foraminifera Southern Ocean |
op_relation |
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://ir.qdio.ac.cn/handle/337002/180252 doi:10.1016/j.palaeo.2022.111267 |
op_doi |
https://doi.org/10.1016/j.palaeo.2022.111267 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
607 |
container_start_page |
111267 |
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1766253141927395328 |