Noble gas evidence of a millennial-scale deep North Pacific palaeo-barometric anomaly
Jenkins, W.J.; Seltzer, A.M.; Gebbie, G.; German, C.R. (2024). Noble gas evidence of a millennial-scale deep North Pacific palaeo-barometric anomaly. Nature Geoscience 17(2): 114-117. https://dx.doi.org/10.1038/s41561-023-01368-z
In: Nature Geoscience. Nature Publishing Group: London. ISSN 1752-0894; e-ISSN 1752-0908, more
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| Authors | | Top |
- Jenkins, W.J.
- Seltzer, A.M.
- Gebbie, G.
- German, C.R.
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| Abstract |
Precise measurements of dissolved noble gases along the GP15 GEOTRACES Pacific Meridional Transect reveal the oldest northern bottom waters equilibrated with the atmosphere at a higher barometric pressure than more recent waters. Here, using a radiocarbon-calibrated multi-tracer-based diagnostic model, we reconstruct the magnitude and timing of this palaeo-barometric pressure anomaly. We hypothesize this multi-millennial trend in sea-level pressure results from local and regional processes extant in Antarctic Bottom Water formation regions. |
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