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Dr Alastair Graham
Timau a rolau for Alastair Graham
Darlithydd
Trosolwyg
Gwyddonydd morol yw Dr. Graham, sy'n astudio'r cysylltiad rhwng llenni iâ a'r cofnod daearegol. Mae ei ddiddordebau ymchwil yn canolbwyntio ar ddatgelu hanesion, mecanweithiau a gyrwyr newid rhewlifol ac amgylcheddol yn y gorffennol fel y'u cofnodir gan loriau cefnforoedd lledred uchel a chofnodion gwaddodol morol, yn ogystal â gwella gwybodaeth am y prosesau ffisegol sy'n rheoli esblygiad amgylcheddau rhewlifol a morol. Gan weithio o'r rhewlif o flaen y môr dwfn, mae agenda ymchwil gyfredol Dr Graham yn cael ei hysgogi gan set o gwestiynau a lywiodd tuag at yr heriau mawr sy'n wynebu gwyddoniaeth amgylcheddol ac Antarctig yn yr 21ain ganrif: pa mor gyflym, gan faint, trwy ba brosesau, ac mewn ymateb i ba sbardunau y mae llenni iâ a rhewlifoedd yn newid dros amserlenni nad ydynt wedi'u dal gan gofnodion arsylwadol? Un o brif amcanion parhaus ei waith yw cynhyrchu cofnodion o newid taflenni iâ yn y gorffennol wrth y polion sy'n sylweddol hirach nag arsylwadau lloeren, gan ddarparu'r cyd-destun canmlwyddol critigol i fileniaidd ar gyfer newidiadau i'n planed gynhesu a'n moroedd sy'n codi. Agwedd allweddol arall yw astudio prosesau amgylcheddau rhewlifol gan ddefnyddio roboteg tanddwr, geoffisegol ac offer daearegol i roi mewnwelediad i ymddygiad haenau iâ modern ac yn y dyfodol. Mae Dr Graham yn gweithio'n rheolaidd gyda rhewlifegwyr, eigionegwyr a biolegwyr i gysylltu prosesau modern a phaleeo mewn lleoliadau llen iâ ac mae'n ceisio pontio systemau hynafol a chyfoes yn ei ymchwil.
Cyhoeddiad
2026
- Rubiano, C. et al., 2026. Paleoshorelines on the West Florida Shelf as indicators of past sea levels. Continental Shelf Research 302 105762. (10.1016/j.csr.2026.105762)
- Heberlein, M. G. et al., 2026. Oceanographic influences and high productivity recorded in a coastal bay of the Amundsen Sea, West Antarctica, during the Holocene. Paleoceanography and Paleoclimatology 41 (6) e2025PA005410. (10.1029/2025pa005410)
2025
- Lehrmann, A. A. et al., 2025. Recent benthic foraminifera communities offshore of Thwaites Glacier in the Amundsen Sea, Antarctica: implications for interpretations of fossil assemblages. Journal of Micropalaeontology 44 (1), pp.79-105. (10.5194/jm-44-79-2025)
2024
- Mussett, M. E. et al., 2024. Analyzing archive transit multibeam data for nodule occurrences. Journal of Marine Science and Engineering 12 (12) 2322. (10.3390/jmse12122322)
- Wåhlin, A. et al., 2024. Swirls and scoops: Ice base melt revealed by multibeam imagery of an Antarctic ice shelf. Science Advances 10 (31) eadn9188. (10.1126/sciadv.adn9188)
2023
- Hogan, K. A. et al., 2023. Towards modelling of corrugation ridges at ice-sheet grounding lines. The Cryosphere 17 (7), pp.2645–2664. (10.5194/tc-17-2645-2023)
2022
- Graham, A. G. C. et al. 2022. Rapid retreat of Thwaites Glacier in the pre-satellite era. Nature Geoscience 15 (9), pp.706-713. (10.1038/s41561-022-01019-9)
2015
- Klages, J. P. et al., 2015. Palaeo-ice stream pathways and retreat style in the easternmost Amundsen Sea Embayment, West Antarctica, revealed by combined multibeam bathymetric and seismic data. Geomorphology 245 , pp.207-222. (10.1016/j.geomorph.2015.05.020)
2014
- Smith, J. A. et al., 2014. New constraints on the timing of West Antarctic Ice Sheet retreat in the eastern Amundsen Sea since the Last Glacial Maximum. Global and Planetary Change 122 , pp.224-237. (10.1016/j.gloplacha.2014.07.015)
- Römer, M. et al., 2014. First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia. Earth and Planetary Science Letters 403 , pp.166-177. (10.1016/j.epsl.2014.06.036)
- Bentley, M. J. et al., 2014. A community-based geological reconstruction of Antarctic Ice Sheet deglaciation since the Last Glacial Maximum. Quaternary Science Reviews 100 , pp.1-9. (10.1016/j.quascirev.2014.06.025)
- Hillenbrand, C. et al., 2014. Reconstruction of changes in the Weddell Sea sector of the Antarctic Ice Sheet since the Last Glacial Maximum. Quaternary Science Reviews 100 , pp.111-136. (10.1016/j.quascirev.2013.07.020)
- Larter, R. D. et al., 2014. Reconstruction of changes in the Amundsen Sea and Bellingshausen Sea sector of the West Antarctic Ice Sheet since the Last Glacial Maximum. Quaternary Science Reviews 100 , pp.55-86. (10.1016/j.quascirev.2013.10.016)
- Dickens, W. A. et al., 2014. A new bathymetric compilation for the South Orkney Islands region, Antarctic Peninsula (49°-39°W to 64°-59°S): Insights into the glacial development of the continental shelf. Geochemistry, Geophysics, Geosystems 15 (6), pp.2494-2514. (10.1002/2014GC005323)
- Hodgson, D. A. et al., 2014. Glacial history of sub-Antarctic South Georgia based on the submarine geomorphology of its fjords. Quaternary Science Reviews 89 , pp.129-147. (10.1016/j.quascirev.2013.12.005)
- Klages, J. P. et al., 2014. Retreat of the West Antarctic Ice Sheet from the western Amundsen Sea shelf at a pre- or early LGM stage. Quaternary Science Reviews 91 , pp.1-15. (10.1016/j.quascirev.2014.02.017)
- Gales, J. A. et al., 2014. Large-scale submarine landslides, channel and gully systems on the southern Weddell Sea margin, Antarctica. Marine Geology 348 , pp.73-87. (10.1016/j.margeo.2013.12.002)
Erthyglau
- Rubiano, C. et al., 2026. Paleoshorelines on the West Florida Shelf as indicators of past sea levels. Continental Shelf Research 302 105762. (10.1016/j.csr.2026.105762)
- Heberlein, M. G. et al., 2026. Oceanographic influences and high productivity recorded in a coastal bay of the Amundsen Sea, West Antarctica, during the Holocene. Paleoceanography and Paleoclimatology 41 (6) e2025PA005410. (10.1029/2025pa005410)
- Lehrmann, A. A. et al., 2025. Recent benthic foraminifera communities offshore of Thwaites Glacier in the Amundsen Sea, Antarctica: implications for interpretations of fossil assemblages. Journal of Micropalaeontology 44 (1), pp.79-105. (10.5194/jm-44-79-2025)
- Mussett, M. E. et al., 2024. Analyzing archive transit multibeam data for nodule occurrences. Journal of Marine Science and Engineering 12 (12) 2322. (10.3390/jmse12122322)
- Wåhlin, A. et al., 2024. Swirls and scoops: Ice base melt revealed by multibeam imagery of an Antarctic ice shelf. Science Advances 10 (31) eadn9188. (10.1126/sciadv.adn9188)
- Hogan, K. A. et al., 2023. Towards modelling of corrugation ridges at ice-sheet grounding lines. The Cryosphere 17 (7), pp.2645–2664. (10.5194/tc-17-2645-2023)
- Graham, A. G. C. et al. 2022. Rapid retreat of Thwaites Glacier in the pre-satellite era. Nature Geoscience 15 (9), pp.706-713. (10.1038/s41561-022-01019-9)
- Klages, J. P. et al., 2015. Palaeo-ice stream pathways and retreat style in the easternmost Amundsen Sea Embayment, West Antarctica, revealed by combined multibeam bathymetric and seismic data. Geomorphology 245 , pp.207-222. (10.1016/j.geomorph.2015.05.020)
- Smith, J. A. et al., 2014. New constraints on the timing of West Antarctic Ice Sheet retreat in the eastern Amundsen Sea since the Last Glacial Maximum. Global and Planetary Change 122 , pp.224-237. (10.1016/j.gloplacha.2014.07.015)
- Römer, M. et al., 2014. First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia. Earth and Planetary Science Letters 403 , pp.166-177. (10.1016/j.epsl.2014.06.036)
- Bentley, M. J. et al., 2014. A community-based geological reconstruction of Antarctic Ice Sheet deglaciation since the Last Glacial Maximum. Quaternary Science Reviews 100 , pp.1-9. (10.1016/j.quascirev.2014.06.025)
- Hillenbrand, C. et al., 2014. Reconstruction of changes in the Weddell Sea sector of the Antarctic Ice Sheet since the Last Glacial Maximum. Quaternary Science Reviews 100 , pp.111-136. (10.1016/j.quascirev.2013.07.020)
- Larter, R. D. et al., 2014. Reconstruction of changes in the Amundsen Sea and Bellingshausen Sea sector of the West Antarctic Ice Sheet since the Last Glacial Maximum. Quaternary Science Reviews 100 , pp.55-86. (10.1016/j.quascirev.2013.10.016)
- Dickens, W. A. et al., 2014. A new bathymetric compilation for the South Orkney Islands region, Antarctic Peninsula (49°-39°W to 64°-59°S): Insights into the glacial development of the continental shelf. Geochemistry, Geophysics, Geosystems 15 (6), pp.2494-2514. (10.1002/2014GC005323)
- Hodgson, D. A. et al., 2014. Glacial history of sub-Antarctic South Georgia based on the submarine geomorphology of its fjords. Quaternary Science Reviews 89 , pp.129-147. (10.1016/j.quascirev.2013.12.005)
- Klages, J. P. et al., 2014. Retreat of the West Antarctic Ice Sheet from the western Amundsen Sea shelf at a pre- or early LGM stage. Quaternary Science Reviews 91 , pp.1-15. (10.1016/j.quascirev.2014.02.017)
- Gales, J. A. et al., 2014. Large-scale submarine landslides, channel and gully systems on the southern Weddell Sea margin, Antarctica. Marine Geology 348 , pp.73-87. (10.1016/j.margeo.2013.12.002)
Ymchwil
Prosiectau cyfredol