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| Windler, Grace; Tierney, Jessica E.; Zhu, Jiang; Poulsen, Christopher J.. |
| The Indo‐Pacific Warm Pool (IPWP) is home to the warmest sea surface temperatures in the world oceans, favoring strong tropospheric convection and heavy rainfall. The mechanisms controlling long‐term change in the region’s hydroclimate are still uncertain. Here, we present a 450,000‐year record of precipitation δD from southern Sumatra that records a consistent pattern of glacial isotopic enrichment and interglacial depletion. We synthesize existing paleo‐indicators of precipitation δD and δ18O in the IPWP and compare results with water isotope‐enabled climate simulations of the Last Glacial Maximum (LGM). The simulations show glacial isotopic enrichment over the eastern Indian Ocean extending into the southern IPWP and isotopic depletion over southeast... |
| Tipo: Text |
Palavras-chave: Leaf wax; Water isotopes; Indo‐Pacific Warm Pool; Pleistocene; Proxy‐model comparison. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00659/77060/78359.pdf |
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| Benetti, M.; Reverdin, G.; Clarke, J.s.; Tynan, E.; Holliday, N.p.; Torres‐valdes, S.; Lherminier, Pascale; Yashayaev, I.. |
| We investigate the origin of freshwater on the shelves near Cape Farewell (south Greenland) using sections of three hydrographic cruises in May (HUD2014007) and June 2014 (JR302 and Geovide) 2014. We partition the freshwater between meteoric water sources and sea ice melt or brine formation using the δ18O of sea water. The sections illustrate the presence of the East Greenland Coastal Current (EGCC) close to shore east of Cape Farewell. West of Cape Farewell, it partially joins the shelf break, with a weaker near‐surface remnant of the EGCC observed on the shelf southwest and west of Cape Farewell. The EGCC traps the freshest waters close to Greenland, and carries a brine signature below 50m depth. The cruises illustrate a strong increase in meteoric water... |
| Tipo: Text |
Palavras-chave: Fresh water; Water isotopes; South Greenland currents. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70349/68413.pdf |
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