Accès ouvert
2025
article
OpenAlex
Peter M. Sheehan, Benjamin G. M. Webber, Alejandra Sanchez‐Franks, Bastien Y. Queste
Oxygen minimum zones (OMZs) occupy large areas of the tropical subsurface oceans and substantially alter regional biogeochemical cycles. In particular, the removal rate of bio-available nitrogen (denitrification) from the water column in OMZs is disproportionate to their size. The Bay of Bengal …
gb, se
(code pays fourni par la source)
Accès ouvert
2025
peer-review
OpenAlex
Peter M. Sheehan
Abstract. Oxygen minimum zones occupy large areas of the tropical subsurface oceans and substantially alter regional bio- geochemical cycles. In particular, the removal rate of bio-available nitrogen (de-nitrification) from the water column in oxygen minimum zones is disproportionate to their size. The …
gb
(code pays fourni par la source)
Accès ouvert
2025
peer-review
OpenAlex
Peter M. Sheehan
Abstract. Oxygen minimum zones occupy large areas of the tropical subsurface oceans and substantially alter regional bio- geochemical cycles. In particular, the removal rate of bio-available nitrogen (de-nitrification) from the water column in oxygen minimum zones is disproportionate to their size. The …
gb
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Tiago S. Dotto, Peter M. Sheehan, Yixi Zheng, Rob A. Hall et autres
Abstract We present the first observations of ocean turbulent mixing rate in front of the Dotson Ice Shelf, where meltwater‐enriched water leaves the cavity. The observations showed elevated turbulent kinetic energy dissipation rates (; ∼10 −7 W kg −1 ) and turbulent …
gb, no
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
Peter M. Sheehan, Benjamin G. M. Webber, Alejandra Sanchez‐Franks, Bastien Y. Queste
Abstract. Oxygen minimum zones occupy large areas of the tropical subsurface oceans and substantially alter regional bio- geochemical cycles. In particular, the removal rate of bio-available nitrogen (de-nitrification) from the water column in oxygen minimum zones is disproportionate to their size. The …
gb, se
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Peter M. Sheehan, Karen J. Heywood
Solar-warmed surface waters subduct beneath Antarctica's ice shelves as a result of wind forcing, but this process is poorly observed and its interannual variability is yet to be assessed. We observe a 50-meter-thick intrusion of warm surface water immediately beneath the Ross …
gb
(code pays fourni par la source)
2024
article
OpenAlex
M.M. Flexas, Andrew F. Thompson, Megan L. Robertson, Kevin Speer et autres
Abstract The West Antarctic Ice Sheet is experiencing rapid thinning of its floating ice shelves, largely attributed to oceanic basal melt. Numerical models suggest that the Bellingshausen Sea has a key role in setting water properties in the Amundsen Sea and further …
us, gb
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Estel Font, Sebastiaan Swart, Gerd Bruss, Peter M. Sheehan et autres
Abstract Dense overflows from marginal seas are critical pathways of oxygen supply to the Arabian Sea oxygen minimum zone (OMZ), yet these remain inadequately understood. Climate models struggle to accurately reproduce the observed extent and intensity of the Arabian Sea OMZ due …
se, Afrique du Sud, om, gb
(code pays fourni par la source)
Accès ouvert
2024
conference-abstract
OpenAlex
Peter M. Sheehan, Karen J. Heywood
Antarctica's solar-warmed surface waters subduct beneath the region's ice shelves as a result of Ekman forcing. In December 2022, an ocean glider collected unprecedented observations of such waters beneath the Ross Ice Shelf, during a serendipitous four-day foray into the sub-glacial cavity; …
gb
(code pays fourni par la source)
Accès ouvert
2024
conference-abstract
OpenAlex
Yixi Zheng, Rob A. Hall, Karen J. Heywood, Bastien Y. Queste et autres
Ice shelves terminating in the Amundsen Sea are losing mass rapidly, exporting an increasing amount of meltwater into the ocean. Investigation into the melt rates of ice shelves near in the Amundsen Sea is therefore crucial for predicting the impact of ice …
gb, se, no
(code pays fourni par la source)
2024
preprint
OpenAlex
Estel Font, Sebastiaan Swart, Gerd Bruss, Peter M. Sheehan et autres
Dense overflows from marginal seas are critical pathways of oxygen supply to the Arabian Sea Oxygen Minimum Zone (OMZ), yet these remain inadequately understood. Climate models struggle to accurately reproduce the observed extent and intensity of the Arabian Sea OMZ due to …
se, Afrique du Sud, om, gb
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Jisuo Jin, Christian M. Ø. Rasmussen, Peter M. Sheehan, David A. T. Harper
Abstract An unusually rich and diverse suite of virgianid brachiopods, hitherto poorly known, is systematically described here for the first time from the Ordovician–Silurian boundary interval (late Katian – Aeronian) of North Greenland. The Late Ordovician virgianids comprise typical taxa of the …
ca, dk, us, gb
(code pays fourni par la source)