Delayed Collapse of the North Pacific Intermediate Water After the Glacial Termination
(2021) In Geophysical Research Letters 48(13).- Abstract
Carbon release from the North Pacific in glacial-interglacial cycles has been mainly linked to the North Pacific Intermediate Water (NPIW) formation and associated carbon/nutrient water upwelling and biological productivity changes. However, relationship between NPIW and atmospheric CO2 change in the early interglacial remains unclear. Here we report a high-resolution sediment record of NPIW evolution based on paleo-redox changes in the Western North Pacific during the last 400 ka. Our proxy and model results reveal a delayed collapse of NPIW after the glacial termination was coeval with decreased salinity of intermediate water and increased net rainfall in the North Pacific. Such weakened NPIW formation in the North Pacific... (More)
Carbon release from the North Pacific in glacial-interglacial cycles has been mainly linked to the North Pacific Intermediate Water (NPIW) formation and associated carbon/nutrient water upwelling and biological productivity changes. However, relationship between NPIW and atmospheric CO2 change in the early interglacial remains unclear. Here we report a high-resolution sediment record of NPIW evolution based on paleo-redox changes in the Western North Pacific during the last 400 ka. Our proxy and model results reveal a delayed collapse of NPIW after the glacial termination was coeval with decreased salinity of intermediate water and increased net rainfall in the North Pacific. Such weakened NPIW formation in the North Pacific probably make a contribution to maintain high atmospheric CO2 concentrations through weakened intermediate-to-deep ocean stratification and reduced subsurface biological pump net efficiency, countering the return to more stratified conditions in the Southern Ocean, which should drive down atmospheric CO2 during the early interglacial.
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- author
- Zhao, Debo ; Wan, Shiming ; Lu, Zhengyao LU ; Zhai, Lina ; Feng, Xuguang ; Shi, Xuefa and Li, Anchun
- organization
- publishing date
- 2021-07
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- marine sediment, NPIW, Okinawa Trough, redox environment, trace elements
- in
- Geophysical Research Letters
- volume
- 48
- issue
- 13
- article number
- e2021GL092911
- publisher
- American Geophysical Union (AGU)
- external identifiers
-
- scopus:85109752590
- ISSN
- 0094-8276
- DOI
- 10.1029/2021GL092911
- language
- English
- LU publication?
- yes
- id
- efeb7148-c74b-4d1a-a53b-9b72a54829df
- date added to LUP
- 2021-12-23 14:50:43
- date last changed
- 2022-04-27 06:55:15
@article{efeb7148-c74b-4d1a-a53b-9b72a54829df, abstract = {{<p>Carbon release from the North Pacific in glacial-interglacial cycles has been mainly linked to the North Pacific Intermediate Water (NPIW) formation and associated carbon/nutrient water upwelling and biological productivity changes. However, relationship between NPIW and atmospheric CO<sub>2</sub> change in the early interglacial remains unclear. Here we report a high-resolution sediment record of NPIW evolution based on paleo-redox changes in the Western North Pacific during the last 400 ka. Our proxy and model results reveal a delayed collapse of NPIW after the glacial termination was coeval with decreased salinity of intermediate water and increased net rainfall in the North Pacific. Such weakened NPIW formation in the North Pacific probably make a contribution to maintain high atmospheric CO<sub>2</sub> concentrations through weakened intermediate-to-deep ocean stratification and reduced subsurface biological pump net efficiency, countering the return to more stratified conditions in the Southern Ocean, which should drive down atmospheric CO<sub>2</sub> during the early interglacial.</p>}}, author = {{Zhao, Debo and Wan, Shiming and Lu, Zhengyao and Zhai, Lina and Feng, Xuguang and Shi, Xuefa and Li, Anchun}}, issn = {{0094-8276}}, keywords = {{marine sediment; NPIW; Okinawa Trough; redox environment; trace elements}}, language = {{eng}}, number = {{13}}, publisher = {{American Geophysical Union (AGU)}}, series = {{Geophysical Research Letters}}, title = {{Delayed Collapse of the North Pacific Intermediate Water After the Glacial Termination}}, url = {{http://dx.doi.org/10.1029/2021GL092911}}, doi = {{10.1029/2021GL092911}}, volume = {{48}}, year = {{2021}}, }