2 Works

Decoupled dust deposition and ocean productivity in the Antarctic Zone of the Southern Ocean over the past 1.5 million years

Michael E. Weber , Ian Bailey , Sidney R. Hemming , Yasmina M. Martos , Brendan T. Reilly , Thomas A. Ronge , Stefanie Brachfeld , Trevor Williams , Maureen Raymo , Simon T. Belt , Hendrik Vogel , Victoria Peck , Linda Armbrecht , Alix Cage , Fabricio G. Cardillo , Zhiheng Du , Gerson Fauth , Christopher J. Fogwill , Marga Garcia , Marlo Garnsworthy , Anna Glüder , Michelle Guitard , Marcus Gutjahr , Iván Hernández-Almeida , Frida S. Hoem … & Xufeng Zheng
Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report the first high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a ≥10-fold increase in dust deposition during glacials and a ≤5-fold...

Co-variation of silicate, carbonate, and sulfide weathering drives CO2 release with erosion: Constraints from southern Taiwan.

Aaron Bufe , Niels Hovius , Robert Emberson , Jeremy Rugenstein , Albert Galy , Hima Hassenruck-Gudipati & Jui-Ming Chang
The supply of fresh minerals to Earth’s surface by erosion is thought to modulate global climate by removing atmospheric carbon dioxide (CO2) through silicate weathering. In turn, weathering of accessory carbonate and sulfide minerals is a geologically-relevant CO2 source, which may dampen or reverse the effect of silicate weathering on climate. Although these weathering pathways commonly operate side by side, we lack quantitative constraints on their co-evolution across erosion-rate gradients. Using stream-water chemistry across a...

Registration Year

  • 2022
    2

Resource Types

  • Text
    2

Affiliations

  • Goddard Space Flight Center
    2
  • Keele University
    1
  • University of Adelaide
    1
  • University of Plymouth
    1
  • Spanish Institute of Oceanography
    1
  • The University of Texas at Austin
    1
  • Columbia University
    1
  • Andalusian Earth Sciences Institute
    1
  • Oregon State University
    1
  • University of California, San Diego
    1