Zobrazeno 1 - 10
of 711
pro vyhledávání: '"M. O'Regan"'
Autor:
A. P. Lepp, L. E. Miller, J. B. Anderson, M. O'Regan, M. C. M. Winsborrow, J. A. Smith, C.-D. Hillenbrand, J. S. Wellner, L. O. Prothro, E. A. Podolskiy
Publikováno v:
The Cryosphere, Vol 18, Pp 2297-2319 (2024)
Silt-rich meltwater plume deposits (MPDs) analyzed from marine sediment cores have elucidated relationships that are clearly connected, yet difficult to constrain, between subglacial hydrology, ice-marginal landforms, and grounding-zone retreat patte
Externí odkaz:
https://doaj.org/article/bd53423d9c394799b306a31afcd18926
Publikováno v:
Scientific Drilling, Vol 33, Pp 33-46 (2024)
The increasing anthropogenic CO2 forcing of the climate system calls for a better understanding of how polar ice sheets may respond to accelerating global warming. The sensitivity of the Greenland ice sheet to polar amplification, changes in ocean he
Externí odkaz:
https://doaj.org/article/f7863a4d102c4680bc3174c368f7e259
Publikováno v:
Geochronology, Vol 5, Pp 285-299 (2023)
We report the results of amino acid racemization (AAR) analyses of aspartic acid (Asp) and glutamic acid (Glu) in the planktic Neogloboquadrina pachyderma, and the benthic Cibicidoides wuellerstorfi, foraminifera species collected from sediment cores
Externí odkaz:
https://doaj.org/article/9246cfb1ba2b45ff9d066678eadfa86d
Publikováno v:
The Cryosphere, Vol 17, Pp 2455-2476 (2023)
Using a conceptual model, we examine how hydraulically controlled exchange flows in silled fjords affect the relationship between the basal glacier melt and the features of warm intermediate Atlantic Water (AW) outside the fjords. We show that an exc
Externí odkaz:
https://doaj.org/article/8e33a0c481524df182684a01880ec916
Autor:
J. R. Farmer, K. J. Keller, R. K. Poirier, G. S. Dwyer, M. F. Schaller, H. K. Coxall, M. O'Regan, T. M. Cronin
Publikováno v:
Climate of the Past, Vol 19, Pp 555-578 (2023)
The oxygen isotopic composition of benthic foraminiferal tests (δ18Ob) is one of the pre-eminent tools for correlating marine sediments and interpreting past terrestrial ice volume and deep-ocean temperatures. Despite the prevalence of δ18Ob applic
Externí odkaz:
https://doaj.org/article/3edbc8f0c8ba405b83658f7b461196df
Publikováno v:
Climate of the Past, Vol 18, Pp 1867-1881 (2022)
The Arctic's glacial history has classically been interpreted from marine records in terms of the fluctuations of the Eurasian and North American ice sheets. However, the extent and timing of the East Siberian Ice Sheet (ESIS) have remained uncertain
Externí odkaz:
https://doaj.org/article/24fc242e8e5644a8bdccf0387700c99d
Autor:
H. Detlef, B. Reilly, A. Jennings, M. Mørk Jensen, M. O'Regan, M. Glasius, J. Olsen, M. Jakobsson, C. Pearce
Publikováno v:
The Cryosphere, Vol 15, Pp 4357-4380 (2021)
The Petermann 2015 expedition to Petermann Fjord and adjacent Hall Basin recovered a transect of cores, extending from Nares Strait to underneath the 48 km long ice tongue of Petermann glacier, offering a unique opportunity to study ice–ocean–sea
Externí odkaz:
https://doaj.org/article/e681b61440e54dc997923a993cf1942b
Autor:
M. O'Regan, T. M. Cronin, B. Reilly, A. K. O. Alstrup, L. Gemery, A. Golub, L. A. Mayer, M. Morlighem, M. Moros, O. L. Munk, J. Nilsson, C. Pearce, H. Detlef, C. Stranne, F. Vermassen, G. West, M. Jakobsson
Publikováno v:
The Cryosphere, Vol 15, Pp 4073-4097 (2021)
The northern sector of the Greenland Ice Sheet is considered to be particularly susceptible to ice mass loss arising from increased glacier discharge in the coming decades. However, the past extent and dynamics of outlet glaciers in this region, and
Externí odkaz:
https://doaj.org/article/e98f3f11ee3d4ebaba81b431a57608c7
Autor:
M. Jakobsson, M. O'Regan, C.-M. Mörth, C. Stranne, E. Weidner, J. Hansson, R. Gyllencreutz, C. Humborg, T. Elfwing, A. Norkko, J. Norkko, B. Nilsson, A. Sjöström
Publikováno v:
Earth Surface Dynamics, Vol 8, Pp 1-15 (2020)
Submarine groundwater discharge (SGD) influences ocean chemistry, circulation, and the spreading of nutrients and pollutants; it also shapes sea floor morphology. In the Baltic Sea, SGD was linked to the development of terraces and semicircular depre
Externí odkaz:
https://doaj.org/article/f7c8d5637e194c9fa1c2d4caef16b3f5
Publikováno v:
Solid Earth, Vol 10, Pp 1541-1554 (2019)
Assessments of future climate-warming-induced seafloor methane (CH4) release rarely include anaerobic oxidation of methane (AOM) within the sediments. Considering that more than 90 % of the CH4 produced in ocean sediments today is consumed by AOM,
Externí odkaz:
https://doaj.org/article/98afe0fa3e0a46c1b087f9119e1bb6d7