Matches in SemOpenAlex for { <https://semopenalex.org/work/W2897218396> ?p ?o ?g. }
- W2897218396 endingPage "1168" @default.
- W2897218396 startingPage "1151" @default.
- W2897218396 abstract "Abstract Atmospheric carbon dioxide (CO 2 ) levels rose by ~90 ppmv during the last deglaciation, but the source of this carbon remains unknown. One popular hypothesis suggests carbon accumulated in the deep Southern Ocean, becoming increasingly radiocarbon ( 14 C) depleted during the last glacial period, and was released into Antarctic Intermediate Water (AAIW) and, subsequently, the atmosphere during deglaciation. Detection of extremely 14 C depleted carbon in the intermediate‐depth tropical oceans during periods of atmospheric CO 2 rise was initially considered the smoking gun for the hypothesis, but attempts to reproduce the anomalies closer to the Southern Ocean source have largely failed. Here we present new 14 C records from four cores recovered at intermediate depths in the eastern equatorial Pacific (EEP). In the context of additional geochemical records, including benthic foraminiferal stable isotopes and sedimentary nitrogen isotopes, we demonstrate that the extreme 14 C anomalies observed during the last deglaciation do not reflect the radiocarbon content of AAIW. We show that although AAIW likely transported modestly 14 C depleted carbon to the EEP subsurface, the extreme 14 C signatures might reflect a distinct source of aged carbon arriving from the north, suggesting the North Pacific helped transport deep ocean carbon to the atmosphere during the last deglaciation. In the EEP, additional local hydrothermal inputs of 14 C‐free carbon near the Galapagos Islands magnified the already low‐ 14 C signatures. Finally, regardless of arrival route (North/South Pacific or hydrothermal), 14 C‐depleted carbon was released from the EEP subsurface during a late deglacial pulse of renewed upwelling, likely contributing to the Younger Dryas rise in atmospheric CO 2 ." @default.
- W2897218396 created "2018-10-26" @default.
- W2897218396 creator A5039960351 @default.
- W2897218396 creator A5061440443 @default.
- W2897218396 creator A5081670746 @default.
- W2897218396 date "2018-11-01" @default.
- W2897218396 modified "2023-10-14" @default.
- W2897218396 title "Ventilation of Northern and Southern Sources of Aged Carbon in the Eastern Equatorial Pacific During the Younger Dryas Rise in Atmospheric CO <sub>2</sub>" @default.
- W2897218396 cites W117878833 @default.
- W2897218396 cites W1499035870 @default.
- W2897218396 cites W1529264670 @default.
- W2897218396 cites W1551039347 @default.
- W2897218396 cites W1558451552 @default.
- W2897218396 cites W1566593795 @default.
- W2897218396 cites W1567677637 @default.
- W2897218396 cites W1587078339 @default.
- W2897218396 cites W1619315866 @default.
- W2897218396 cites W1657772896 @default.
- W2897218396 cites W1668155428 @default.
- W2897218396 cites W1673196843 @default.
- W2897218396 cites W1895704235 @default.
- W2897218396 cites W1902097235 @default.
- W2897218396 cites W1933102174 @default.
- W2897218396 cites W1955619253 @default.
- W2897218396 cites W1964411468 @default.
- W2897218396 cites W1964950613 @default.
- W2897218396 cites W1966369810 @default.
- W2897218396 cites W1967093202 @default.
- W2897218396 cites W1969184914 @default.
- W2897218396 cites W1971816180 @default.
- W2897218396 cites W1976810943 @default.
- W2897218396 cites W1981976147 @default.
- W2897218396 cites W1985246090 @default.
- W2897218396 cites W1988124533 @default.
- W2897218396 cites W2005820608 @default.
- W2897218396 cites W2006347551 @default.
- W2897218396 cites W2012434986 @default.
- W2897218396 cites W2012604679 @default.
- W2897218396 cites W2013369512 @default.
- W2897218396 cites W2014587240 @default.
- W2897218396 cites W2014727327 @default.
- W2897218396 cites W2016738078 @default.
- W2897218396 cites W2017004431 @default.
- W2897218396 cites W2018156694 @default.
- W2897218396 cites W2018799022 @default.
- W2897218396 cites W2023542692 @default.
- W2897218396 cites W2029783693 @default.
- W2897218396 cites W2030125283 @default.
- W2897218396 cites W2034808289 @default.
- W2897218396 cites W2035587516 @default.
- W2897218396 cites W2035800339 @default.
- W2897218396 cites W2040418049 @default.
- W2897218396 cites W2042476750 @default.
- W2897218396 cites W2046860520 @default.
- W2897218396 cites W2050907384 @default.
- W2897218396 cites W2051461957 @default.
- W2897218396 cites W2057037894 @default.
- W2897218396 cites W2058931034 @default.
- W2897218396 cites W2063564075 @default.
- W2897218396 cites W2063940323 @default.
- W2897218396 cites W2064368240 @default.
- W2897218396 cites W2069287068 @default.
- W2897218396 cites W2074534955 @default.
- W2897218396 cites W2074901826 @default.
- W2897218396 cites W2075115328 @default.
- W2897218396 cites W2075385168 @default.
- W2897218396 cites W2076517688 @default.
- W2897218396 cites W2079487889 @default.
- W2897218396 cites W2079639348 @default.
- W2897218396 cites W2082763329 @default.
- W2897218396 cites W2083072147 @default.
- W2897218396 cites W2084428435 @default.
- W2897218396 cites W2087726348 @default.
- W2897218396 cites W2094633221 @default.
- W2897218396 cites W2103644013 @default.
- W2897218396 cites W2107935469 @default.
- W2897218396 cites W2122489548 @default.
- W2897218396 cites W2122842644 @default.
- W2897218396 cites W2131537194 @default.
- W2897218396 cites W2136778644 @default.
- W2897218396 cites W2139735175 @default.
- W2897218396 cites W2143564720 @default.
- W2897218396 cites W2143666789 @default.
- W2897218396 cites W2150303148 @default.
- W2897218396 cites W2161480748 @default.
- W2897218396 cites W2167660863 @default.
- W2897218396 cites W2168628932 @default.
- W2897218396 cites W2171106889 @default.
- W2897218396 cites W2171488289 @default.
- W2897218396 cites W2176193992 @default.
- W2897218396 cites W2207261144 @default.
- W2897218396 cites W2248445980 @default.
- W2897218396 cites W2271787024 @default.
- W2897218396 cites W2510444084 @default.
- W2897218396 cites W2530530791 @default.
- W2897218396 cites W2563098306 @default.
- W2897218396 cites W2579894470 @default.
- W2897218396 cites W2735578458 @default.