Results 21 to 30 of about 161 (103)
Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity
Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.Abstract Marine ammonia oxidizing archaea (AOA) produce isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which form the basis of seawater temperature proxy TEX86. Although most studies use TEX86 for sea surface temperature (SST) reconstructions, maximum GDGT production occurs at and below the nitracline. Moreover, sedimentary GDGT‐2/GDGT‐3
Addison Rice +12 more
wiley +1 more source
Global Biogeochemical Cycles, Volume 39, Issue 10, October 2025.Abstract Marine oxygen deficient zones (ODZs) play a major role in the Earth's biogeochemical cycles and are responsible for nitrogen and sulfur removal from the oceans. Microbial‐reducing reaction processes generate nitrite (NO2−) and sulfur compounds as intermediaries that may accumulate in these zones.
Mariana B. Bif, Kenneth S. Johnson
wiley +1 more source
Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950
Geophysical Research Letters, Volume 46, Issue 24, Page 14683-14691, 28 December 2019., 2019 Abstract The Northwest Atlantic is a region of major climate change over the twentieth century, affected by the weakening of the Atlantic meridional overturning circulation. To assess whether the ability of this region to absorb anthropogenic CO2 has been impacted by this change, we present the region's first long‐term carbon isotope (δ13C) time series
Stefanie Mellon +7 more
wiley +1 more source
Yucatan Hurricane Activity Highlights Common Era Tropical Cyclone Dipole
Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.Abstract Tropical cyclone (TC) impacts along the western Atlantic and Caribbean margin are not spatially uniform. Proxy based reconstructions of Common Era TC activity highlight this non‐uniform distribution at centennial‐millennial timescales. However, the sparse geographic scope of these reconstructions impedes our assessment of TC landfalls across ...
Richard M. Sullivan +12 more
wiley +1 more source
The Global Biogeochemical Cycle of Chromium at the Earth's Surface
Global Biogeochemical Cycles, Volume 39, Issue 6, June 2025.Abstract The biogeochemistry of Cr and its cycling in Earth's surface environments is reviewed. A synthesis and critical evaluation of the major processes controlling Cr mobility and isotope composition (δ53Cr) is presented, taking a source to sink view beginning with Cr mobilization from Earth's crust.
David J. Janssen +3 more
wiley +1 more source
Intense Hurricane Activity Over the Past 1500 Years at South Andros Island, The Bahamas
Paleoceanography and Paleoclimatology, Volume 34, Issue 11, Page 1761-1783, November 2019., 2019 Abstract Hurricanes cause substantial loss of life and resources in coastal areas. Unfortunately, historical hurricane records are too short and incomplete to capture hurricane‐climate interactions on multi‐decadal and longer timescales. Coarse‐grained, hurricane‐induced deposits preserved in blue holes in the Caribbean can provide records of past ...
E. J. Wallace +8 more
wiley +1 more source
Paleoceanography and Paleoclimatology, Volume 40, Issue 4, April 2025.Abstract Throughout the Phanerozoic, the oceans repeatedly became oxygen depleted and deposited marine sediments called black shales. The mechanisms responsible for the compositional variability of black shales deposited at different times and places, however, are not yet fully understood.
M. Yano +6 more
wiley +1 more source
Microbial Metabolism and Environmental Controls of Acetate Cycling in the Northwest Pacific Ocean
Geophysical Research Letters, Volume 51, Issue 17, 16 September 2024.Abstract Microbial acetate metabolism is an important part of marine carbon cycling. We present a comprehensive study to constrain microbial acetate metabolism and its regulation in surface seawater of the northwest Pacific Ocean. We found that acetate oxidation (rate constant k: 0.016–0.506 day−1) accounted for 77.6%–99.4% of the total microbial ...
Shi‐Hai Mao +7 more
wiley +1 more source
AGU Advances, Volume 5, Issue 1, February 2024.Abstract In combination with dramatic and immediate CO2 emissions reductions, net‐negative atmospheric CO2 removal (CDR) is necessary to maintain average global temperature increases below 2.0°C. Many proposed CDR pathways involve the placement of vast quantities of organic carbon (biomass) on the seafloor in some form, but little is known about their ...
M. R. Raven +6 more
wiley +1 more source
Brazilian Journal of OceanographyThis study aims to evaluate the effect of environmental variability on the growth and survival of the subtropical and tropical mussels Perna perna and Perna viridis at four different culture depths in the Gulf of Cariaco during an annual cycle. Juveniles
Marielyn García +5 more
doaj +1 more source