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Dr Ricardo Ramalho
(e/fe)
- Ar gael fel goruchwyliwr ôl-raddedig
Timau a rolau for Ricardo Ramalho
Uwch Ddarlithydd mewn Peryglon Geo-Amgylcheddol
Trosolwyg
Rwy'n ddaearegwr y mae ei ymchwil yn canolbwyntio ar geodynameg a pheryglon llosgfynyddoedd ynysoedd y cefnforoedd.
Llosgfynyddoedd ynysoedd y cefnfor yw rhai o'r strwythurau mwyaf amlwg a sy'n ffurfio'n gyflym ar y Ddaear, ac eto mae eu tarddiad yn dal i fod yn enigmatig iawn gan na ellir eu hesbonio o hyd gan tectoneg plât confensiynol. Maent hefyd yn cynnwys un o'r tirweddau mwyaf deinamig yn ein planed, gan fod yn ffynhonnell geoberyglon dinistriol iawn fel ffrwydradau paroxysmal, cwympiadau ochrol enfawr, a megatsunamis. Felly mae ymchwil ar losgfynyddoedd ynysoedd y môr yn un o'r ffiniau olaf yng nghyd-ddealltwriaeth deinameg fewnol ein Planed ac mae'n sylfaenol i wledydd sydd â sofraniaeth dros archipelagos folcanig, fel y DU.
Fy nod canolog yw deall sut mae llosgfynyddoedd ynys yn tyfu ac yn pydru, ar wahanol adegau a graddfeydd gofodol, a sut mae'r esblygiad hwnnw'n adlewyrchu'r rhyngweithio cyfannol rhwng prosesau wyneb a mecanweithiau daear dwfn.
Mae fy ngwaith hefyd yn canolbwyntio ar ymchwilio i'r perygl posibl a achosir gan losgfynyddoedd ynys, gan gynnwys ar echdoriadau folcanig (eu dynameg, effeithiau ac amlder), tirlithriadau (mecanweithiau ac effeithiau sbardun), tsunamis (cynhyrchu, lluosogi ac effaith), lahars (mecanweithiau ac effeithiau sbardun), stormydd (amlder ac effeithiau), ac erydiad arfordirol (fel swyddogaeth o ystod o wahanol ffactorau).
Felly, mae fy ymchwil yn eang iawn, gan bontio meysydd daeareg folcanig, tectoneg platiau a daeareg strwythurol, geomorffoleg, stratigraffeg, gwaddodeg, a pheryglon naturiol.
Mae fy ngwaith yn seiliedig ar faes (ar y tir ac ar y môr), ond mae'n ymestyn ac yn dibynnu ar ystod o dechnegau llafurus a modelu ategol eraill, gan ei wneud yn rhyngddisgyblaethol ac yn gydweithredol iawn ei natur.
Allweddeiriau:
- Llosgfynyddoedd ynysoedd y cefnfor
- Geodynameg
- Mannau Poeth
- Esblygiad tirwedd
- Tirlithriadau
- Tsunamis
- Ffrwydradau folcanig
Cyhoeddiad
2026
- Maetmueang, C. et al. 2026. De-risking structural traps for carbon capture and storage (CCS) on a magma-rich continental margin. Marine Geoscience and Energy Resources 192 207808. (10.1016/j.marger.2026.207808)
- Hadré, E. et al., 2026. Seismic evidence of multi-stage volcanic flank collapse and refined deposit volume offshore Fogo, Cabo Verde. Bulletin of Volcanology 88 (8) 90. (10.1007/s00445-026-02014-3)
- Scheffler, J. M. et al., 2026. Fingerprinting glass compositions of Fogo Volcano (Cabo Verde): a tool for tephra correlation. Bulletin of Volcanology 88 82. (10.1007/s00445-026-02005-4)
- Zhao, Z. et al., 2026. Rapid changes of the lava‐delta coastlines formed by the 2021 volcanic eruption on La Palma, Canary Islands. Earth Surface Processes and Landforms 51 (6) e70318. (10.1002/esp.70318)
- Hicks, S. P. et al., 2026. Fault-mediated magma propagation and triggered seismicity revealed by the 2022 São Jorge Azores unrest. Nature Communications 17 (1) 3531. (10.1038/s41467-026-71668-6)
- Avila, S. P. et al., 2026. Comparing the Last Interglacial (MIS 5e) with the present interglacial period (MIS 1) using a multi dimensional functional diversity analysis : The marine molluscs from Santa Maria Island (Azores Archipelago, central Atlantic) as a case study. Journal of Quaternary Science 41 (2), pp.333-360. (10.1002/jqs.70041)
- Rovere, A. et al., 2026. Paleo extreme storm waves in the North Atlantic: geological evidence from Sal Island, Cape Verde Archipelago. Geomorphology 493 110076. (10.1016/j.geomorph.2025.110076)
2025
- Andrade, M. et al., 2025. Controls on water-magma interactions at hydraulically-charged volcanic islands. Geophysical Research Letters 52 (18) e2025GL115727. (10.1029/2025GL115727)
- Ávila, S. P. et al., 2025. Extending the Sea-Level Sensitive dynamic model of marine island biogeography to include fusion-fission islands. Frontiers of Biogeography 18 e141200. (10.21425/fob.18.141200)
- Zhao, Z. et al., 2025. Systematic slowing of initially rapid retreat of new coasts formed by historical eruptions in volcanic islands. Journal of Geophysical Research: Earth Surface 130 (8) e2024JF008058. (10.1029/2024jf008058)
- Johnson, M. E. et al., 2025. Basalt sea stack and related facies from the Middle Pleistocene on Sal Island (Cabo Verde Archipelago, NE Atlantic Ocean). Facies 71 (4) 20. (10.1007/s10347-025-00710-8)
- Johnson, M. E. et al., 2025. Potholes and resident boulders on a contemporary limestone shore (Sal Island, Cabo Verde Archipelago, Northeast Atlantic Ocean). Journal of Coastal Research 41 (4), pp.657-665. (10.2112/JCOASTRES-D-24A-00014.1)
- Ávila, S. P. et al., 2025. Megatsunami deposits and range expansion of cold-temperate marine species towards the tropics in glacial times. Frontiers of Biogeography 18 (10.21425/fob.18.138319)
- Candeias, C. et al., 2025. Investigating the hydrothermal activity at Fogo volcano (Cape Verde) using geochemical analyses of soil samples. Comunicações Geológicas 112 , pp.21-24. (10.34637/40tv-e076)
- Melo, C. S. et al., 2025. Sedimentary facies and invertebrate faunal exchange confirm humid conditions in the tropical eastern Atlantic during interglacial Marine Isotopic Stage (MIS) 11c. Palaeogeography, Palaeoclimatology, Palaeoecology 684 113505. (10.1016/j.palaeo.2025.113505)
- Sáez, A. et al., 2025. Westerlies migrations and volcanic records over the past 4000 years from the Azores lacustrine sequences. Exploring correlations and impacts on Western Europe. Global and Planetary Change 246 104698. (10.1016/j.gloplacha.2025.104698)
2024
- McLean, D. et al., 2024. Opportunities to synchronise and date archaeological and climate records in Northwest Africa using volcanic ash (tephra) layers. Libyan Studies 55 , pp.48-68. (10.1017/lis.2024.18)
- Reeb, A. et al., 2024. Systematics and paleobiogeography of Quaternary corals from Cabo Verde Archipelago. Quaternary Research 121 , pp.94-108. (10.1017/qua.2024.20)
- Gómez Pazo, A. et al., 2024. Dinámica de bloques mediante sensores RFID en la Fajã da Caldeira de Santo Cristo (Ilha de São Jorge, Archipiélago de las Azores). Presented at: XII Coastal Geomorphology Conference Valencia, Spain 25-27 September 2024. Proceedings of the XII Coastal Geomorphology Conference. , pp.159-164. (10.4995/GEOLIT24.2024.18573)
- Schlaphorst, D. et al., 2024. Corrigendum: Dynamic subsurface changes on El Hierro and La Palma during volcanic unrest revealed by temporal variations in seismic anisotropy patterns. Frontiers in Earth Science 12 1448102. (10.3389/feart.2024.1448102)
- Fontiela, J. et al., 2024. Editorial: Challenges in seismology to our understanding of volcanic islands and their magmatic unrest. Frontiers in Earth Science 12 1431193. (10.3389/feart.2024.1431193)
- Kwasnitschka, T. et al., 2024. Geomorphology and age constraints of seamounts in the Cabo Verde Archipelago, and their relationship to island ages and geodynamic evolution. Geochemistry, Geophysics, Geosystems 25 (3) e2023GC011071. (10.1029/2023gc011071)
- Schlaphorst, D. et al., 2024. Dynamic subsurface changes on El Hierro and La Palma during volcanic unrest revealed by temporal variations in seismic anisotropy patterns. Frontiers in Earth Science 11 1299338. (10.3389/feart.2023.1299338)
2023
- Melo, C. S. et al., 2023. Palaeobiogeography of NE Atlantic archipelagos during the Last Interglacial (MIS 5e): a molluscan approach to the conundrum of Macaronesia as a marine biogeographic unit. Quaternary Science Reviews 319 108313. (10.1016/j.quascirev.2023.108313)
- DeVitre, C. L. et al., 2023. Oceanic intraplate explosive eruptions fed directly from the mantle. Proceedings of the National Academy of Sciences 120 (33) e2302093120. (10.1073/pnas.2302093120)
- Andrade, M. et al., 2023. The recent volcanism of Flores Island (Azores), Part II: Stratigraphy and eruptive history of the Comprida Volcanic System. Journal of Volcanology and Geothermal Research 438 107806. (10.1016/j.jvolgeores.2023.107806)
2022
- Andrade, M. et al., 2022. The recent volcanism of Flores Island (Azores): Stratigraphy and eruptive history of Funda Volcanic System. Journal of Volcanology and Geothermal Research 432 107706. (10.1016/j.jvolgeores.2022.107706)
- Carvalho, J. et al., 2022. 3D-ambient noise surface wave tomography of Fogo volcano, Cape Verde. Journal of Volcanology and Geothermal Research 432 107702. (10.1016/j.jvolgeores.2022.107702)
- Carvalho, J. et al., 2022. Crustal and uppermost mantle structure of Cape Verde from ambient noise tomography. Geophysical Journal International 231 (2), pp.1421-1433. (10.1093/gji/ggac254)
- Omira, R. et al., 2022. Global Tonga tsunami explained by a fast-moving atmospheric source. Nature 609 , pp.734-740. (10.1038/s41586-022-04926-4)
- Pereira, R. et al., 2022. Nature, timing and magnitude of buried Late Cretaceous magmatism on the central West Iberian Margin. Basin Research 34 (2), pp.771-796. (10.1111/bre.12640)
- Omira, R. et al., 2022. How hazardous are tsunamis triggered by small-scale mass-wasting events on volcanic islands? New insights from Madeira – NE Atlantic. Earth and Planetary Science Letters 578 117333. (10.1016/j.epsl.2021.117333)
2021
- Rebelo, A. C. et al., 2021. Pleistocene coralline algal buildups on a mid-ocean rocky shore – insights into the MIS 5e record of the Azores. Palaeogeography, Palaeoclimatology, Palaeoecology 579 110598. (10.1016/j.palaeo.2021.110598)
- Andrade, M. et al., 2021. Unraveling the holocene eruptive history of Flores Island (Azores) through the analysis of lacustrine sedimentary records. Frontiers in Earth Science 9 738178. (10.3389/feart.2021.738178)
- Dávid, Á. et al., 2021. Diverse bioerosion structures in lower Pliocene deposits from a volcanic oceanic island: Baía de Nossa Senhora section, Santa Maria Island, Azores (central North Atlantic). Palaeogeography, Palaeoclimatology, Palaeoecology 569 110284. (10.1016/j.palaeo.2021.110284)
- Costa, P. J. M. et al., 2021. A review on onshore tsunami deposits along the Atlantic coasts. Earth-Science Reviews 212 103441. (10.1016/j.earscirev.2020.103441)
- Hyžný, M. et al., 2021. Pliocene and late Pleistocene (MIS 5e) decapod crustaceans from Santa Maria Island (Azores Archipelago: Central Atlantic): systematics, palaeoecology and palaeobiogeography. Journal of Quaternary Science 36 (1), pp.91-109. (10.1002/jqs.3261)
2020
- Uchman, A. et al., 2020. Neogene marine sediments and biota encapsulated between lava flows on Santa Maria Island (Azores, north-east Atlantic): an interplay between sedimentary, erosional and volcanic processes. Sedimentology 67 (7), pp.3595-3618. (10.1111/sed.12763)
- Zhao, Z. et al., 2020. Coastal erosion rates of lava deltas around oceanic islands. Geomorphology 370 107410. (10.1016/j.geomorph.2020.107410)
- Johnson, M. E. , Ramalho, R. and Silva, C. M. 2020. Storm-related rhodolith deposits from the upper pleistocene and recycled coastal holocene on Sal Island (cabo verde archipelago). Geosciences 10 (11) 419. (10.3390/geosciences10110419)
- Ricchi, A. et al., 2020. Imprints of volcanic, erosional, depositional, tectonic and mass-wasting processes in the morphology of Santa Maria insular shelf (Azores). Marine Geology 424 106163. (10.1016/j.margeo.2020.106163)
- Madeira, J. et al., 2020. A geological record of multiple Pleistocene tsunami inundations in an oceanic island: the case of Maio, Cape Verde. Sedimentology 67 (3), pp.1529-1552. (10.1111/sed.12612)
- Ramalho, R. S. et al. 2020. Evidence for late Pleistocene volcanism at Santa Maria Island, Azores?. Journal of Volcanology and Geothermal Research 394 106829. (10.1016/j.jvolgeores.2020.106829)
- Pimentel, A. et al., 2020. Editorial: Ocean island volcanoes: genesis, evolution and impact. Frontiers in Earth Science 8 82. (10.3389/feart.2020.00082)
- Barrett, R. et al., 2020. Revisiting the tsunamigenic volcanic flank collapse of fogo island in the cape verdes, offshore West Africa. Geological Society Special Publications 500 (1), pp.13-26. (10.1144/SP500-2019-187)
2019
- Santos, R. et al., 2019. Gravitational, erosional, sedimentary and volcanic processes on the submarine environment of Selvagens Islands (Madeira Archipelago, Portugal). Marine Geology 415 105945. (10.1016/j.margeo.2019.05.004)
- Santos, R. et al., 2019. Corrigendum to “Gravitational, erosional, sedimentary and volcanic processes on the submarine environment of Selvagens Islands (Madeira Archipelago, Portugal)” (Marine Geology (2019) 415, (S0025322719300441), (10.1016/j.margeo.2019.05.004)). Marine Geology 417 106010. (10.1016/j.margeo.2019.106010)
- Ávila, S. P. et al., 2019. Towards a ‘Sea-Level Sensitive’ dynamic model. Biological Reviews 94 (3), pp.1116-1142. (10.1111/brv.12492)
- Mitchell, N. et al., 2019. Coastal erosion rates of lava deltas around oceanic islands. Presented at: EGU General Assembly 2019 Vienna, Austria 7-12 April 2019.
- Rebelo, A. C. et al., 2019. Formation, transport and deposition of rhodoliths on reefless insular shelves of the Azores volcanic Archipelago. Presented at: 34th IAS Meeting of Sedimentology Rome, Italy 10-13 September 2019.
- Rebelo, A. et al., 2019. Pleistocene coralline algal frameworks from the Azores (NE Atlantic). Presented at: 12th International Symposium on Fossil Algae Lucknow, India 16-24 September 2019.
2018
- Ramalho, R. et al. 2018. The geology of Formigas Islets and its significance to our comprehension of the Terceira Rift in the Azores Triple Junction. Presented at: 2018 American Geophysical Union Fall Meeting Washington DC, United States 10-14 December 2018.
- Ricchi, A. et al., 2018. Marine terrace development on reefless volcanic islands. Marine Geology 406 , pp.42-56. (10.1016/j.margeo.2018.09.002)
- Quartau, R. et al., 2018. The role of subsidence in shelf widening around ocean island volcanoes. Earth and Planetary Science Letters 498 , pp.408--417. (10.1016/j.epsl.2018.07.007)
- Uchman, A. et al., 2018. Feeding traces of recent ray fish and occurrences of the trace fossil piscichnus waitemata from the pliocene of santa maria Island, azores (Northeast Atlantic). Palaios 33 (8), pp.361--375. (10.2110/palo.2018.027)
- Melo, C. S. et al., 2018. Genesis and morphological evolution of coastal talus-platforms (fajãs) with lagoons: The case study of the newly-formed Fajã dos Milagres (Corvo Island, Azores). Geomorphology 310 , pp.138-152. (10.1016/j.geomorph.2018.03.006)
- Johnson, M. E. et al., 2018. On the rise and fall of oceanic islands. Earth-Science Reviews 180 , pp.17-36. (10.1016/j.earscirev.2018.03.008)
- Spieker, K. et al., 2018. Constraints on the structure of the crust and lithosphere beneath the Azores Islands from teleseismic receiver functions. Geophysical Journal International 213 (2), pp.824--835. (10.1093/gji/ggy022)
- Melo, C. S. , Ramalho, R. and Borges, P. A. V. 2018. Fajã dos Milagres: o desvendar da formação de fajãs detríticas com sistemas lagunares. University of the Azores Department of Agricultural Sciences Newsletter
- Avila, S. P. et al., 2018. The marine fossil record at Santa Maria Island (Azores). In: Kueppers, U. and Beier, C. eds. Volcanoes of the Azores. Springer. , pp.155-196. (10.1007/978-3-642-32226-6_9)
- Quartau, R. et al., 2018. Gravitational, erosional and depositional processes on volcanic ocean islands: Insights from the submarine morphology of Madeira Archipelago. Earth and Planetary Science Letters 482 , pp.288--299. (10.1016/j.epsl.2017.11.003)
- Paris, R. et al., 2018. Mega-tsunami conglomerates and flank collapses of ocean island volcanoes. Marine Geology 395 , pp.168-187. (10.1016/j.margeo.2017.10.004)
- Melo, C. et al., 2018. Genesis and morphological evolution of coastal talus-platforms (fajãs) with lagoons: the case study of the recently-formed Fajã dos Milagres (Corvo Island, Azores). Presented at: EGU General Assembly 2018 Vienna, Austria 8-13 April 2018.
- Quartau, R. et al., 2018. The role of subsidence in shelf widening around ocean island volcanoes: Insights from observed morphology and modeling. Presented at: 2018 American Geophysical Union Fall Meeting Washington DC, United States 10-14 December 2018.
- Ramalho, R. et al. 2018. The geological evolution of Santa Maria Island in the Azores Archipelago: a review. Presented at: 10th Portuguese Nacional Geological Congress
- Ramalho, R. et al. 2018. Emergence and evolution of Santa Maria Island. Presented at: EGU General Assembly 2018 Vienna, Austria 8-13 April 2018.
- Ramalho, R. et al. 2018. Evidence for late Pleistocene volcanism at Santa Maria Island, Azores?. Presented at: EGU General Assembly 2018 Vienna, Austria 8-13 April 2018.
- Ramalho, R. et al. 2018. The geological evolution of Flores island in the Azores Archipelago: a product of multi-stage volcanism and a complex history of vertical movements. Presented at: 10th Portuguese Nacional Geological Congress
- Ricchi, A. et al., 2018. Santa Maria Island’s (Azores Archipelago) geological evolution: new insights from high-resolution marine geophysical data.. Presented at: EGU General Assembly 2018 Vienna, Austria 8-13 April 2018.
2017
- Uchman, A. et al., 2017. The trace fossil Diopatrichnus santamariensis nov. isp. – a shell armored tube from Pliocene sediments of Santa Maria Island, Azores (NE Atlantic Ocean). Geobios 50 (5-6), pp.459-469. (10.1016/j.geobios.2017.09.002)
- Ávila, S. P. et al., 2017. Glacial-age tsunami deposits prove the tropical-ward geographical range expansion of marine cold-water species. Presented at: 5th International Tsunami Field Symposium 2017 Lisbon, Portugal 3-7 September 2017.
- Mata, J. et al., 2017. The 2014--15 eruption and the short-term geochemical evolution of the Fogo volcano (Cape Verde): Evidence for small-scale mantle heterogeneity. Lithos 288-28 , pp.91-107. (10.1016/j.lithos.2017.07.001)
- Ramalho, R. S. et al. 2017. Fields of stranded megaclasts as potential evidence for tsunami inundation in Sal Island (Cape Verde). Presented at: 5th International Tsunami Field Symposium 2017 Lisbon, Portugal 3-7 September 2017.
- Ramalho, R. S. et al. 2017. Evidence for megatsunami inundation on SE Santiago Island (Cape Verde) - the field of megaclasts of Ponta do Lobo. Presented at: 5th International Tsunami Field Symposium 2017 Lisbon, Portugal 3-7 September 2017.
- Berndt, T. et al., 2017. Paleomagnetic field reconstruction from mixtures of titanomagnetites. Earth and Planetary Science Letters 465 , pp.70-81. (http://dx.doi.org/10.1016/j.epsl.2017.02.033)
- Johnson, M. E. et al., 2017. Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal). Marine Geology 385 , pp.244-249. (10.1016/j.margeo.2017.02.002)
- Johnson, M. E. et al., 2017. Taphonomic range and sedimentary dynamics of modern and fossil rhodolith beds: Macaronesian realm (North Atlantic ocean). In: Riosmena-Rodríguez, R. , Nelson, W. and Aguirre, J. eds. Rhodolith/Maërl Beds: A Global Perspective. Vol. 15, Springer. , pp.221-261. (10.1007/978-3-319-29315-8_9)
2016
- Johnson, M. E. et al., 2016. Recent rhodolith deposits stranded on the windward shores of Maio (Cape Verde Islands). Journal of Coastal Research 32 (4), pp.735-743. (10.2112/JCOASTRES-D-15-00211.1)
- Rebelo, A. C. et al., 2016. Rocking around a volcanic island shelf. Facies 62 (3) 22. (10.1007/s10347-016-0473-9)
- Ramalho, J. R. , Santos, R. and Beynon, H. 2016. Huw Beynon: marxismo e sociologia. Sociologia & Antropologia 6 (1)(10.1590/2238-38752016v611)
- Uchman, A. et al., 2016. Vertically-oriented trace fossil Macaronichnus segregatis from Neogene of Santa Maria Island (Azores; NE Atlantic) records vertical fluctuations of the coastal groundwater mixing zone on a small oceanic island. Geobios 49 (3), pp.229-241. (10.1016/j.geobios.2016.01.016)
2015
- Ramalho, R. S. et al. 2015. Hazard potential of volcanic flank collapses raised by new megatsunami evidence. Science Advances 1 (9) e1500456. (10.1126/sciadv.1500456)
- Eisele, S. et al., 2015. Stratigraphy of the Pleistocene, phonolitic Cão Grande formation on Santo Antão, Cape Verde. Journal of Volcanology and Geothermal Research 301 , pp.204-220. (10.1016/j.jvolgeores.2015.03.012)
- Santos, A. et al., 2015. Role of environmental change in rock-boring echinoid trace fossils. Palaeogeography, Palaeoclimatology, Palaeoecology 432 , pp.1-14. (10.1016/j.palaeo.2015.04.029)
- Ávila, S. P. et al., 2015. Palaeoecology, taphonomy, and preservation of a lower Pliocene shell bed (coquina) from a volcanic oceanic island (Santa Maria Island, Azores). Palaeogeography, Palaeoclimatology, Palaeoecology 430 , pp.57-73. (10.1016/j.palaeo.2015.04.015)
- Ávila, S. P. et al., 2015. The Palaeontological heritage of Santa Maria Island (Azores: NE Atlantic): a re-evaluation of geosites in GeoPark Azores and their use in Geotourism. Geoheritage 8 , pp.155-171. (10.1007/s12371-015-0148-x)
- Ávila, S. P. et al., 2015. A review of the MIS 5e highstand deposits from Santa Maria Island (Azores, NE Atlantic): palaeobiodiversity, palaeoecology and palaeobiogeography. Quaternary Science Reviews 114 , pp.126-148. (10.1016/j.quascirev.2015.02.012)
- Ramalho, R. S. et al. 2015. The emergence of volcanic oceanic islands on a slow-moving plate: the example of Madeira Island, NE Atlantic. Geochemistry, Geophysics, Geosystems 16 (2), pp.522-537. (10.1002/2014GC005657)
2014
- Jefferson, A. J. et al., 2014. Controls on the hydrological and topographic evolution of shield volcanoes and volcanic ocean islands. In: Harpp, K. S. et al., The Galápagos: A Natural Laboratory for the Earth Sciences. Wiley-Blackwell. , pp.185-213. (10.1002/9781118852538.ch10)
- Jefferson, A. J. et al., 2014. Controls on the hydrological landscape evolution of shield volcanoes and volcanic ocean islands. In: Harpp, K. S. et al., The Galápagos: A Natural Laboratory for the Earth Sciences. Geophysical Monograph Series AGU. , pp.185-213. (10.1002/9781118852538.ch10)
- Johnson, M. E. et al., 2014. Miocene-Pliocene rocky shores on Sao Nicolau (Cape Verde Islands): contrasting windward and leeward biofacies on a volcanically active oceanic island. Palaeogeography, Palaeoclimatology, Palaeoecology 395 , pp.131-143. (10.1016/j.palaeo.2013.12.028)
2013
- Johnson, M. E. et al., 2013. Coastal dunes with high content of rhodolith (coralline red algae) bioclasts: Pleistocene formations on Maio and Sao Nicolau in the Cape Verde archipelago. Aeolian Research 8 , pp.1-9. (10.1016/j.aeolia.2012.10.008)
- Mayoral, E. et al., 2013. Ichnology in oceanic islands, case studies from the Cape Verde Archipelago. Palaeogeography Palaeoclimatology Palaeoecology 381 , pp.47-66. (10.1016/j.palaeo.2013.04.014)
- Meireles, R. P. et al., 2013. Depositional processes on oceanic island shelves - Evidence from storm-generated Neogene deposits from the mid-North Atlantic. Sedimentology 60 (7), pp.1769-1785. (10.1111/sed.12055)
- Ramalho, R. S. et al. 2013. Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production. Earth-Science Reviews 127 , pp.140-170. (10.1016/j.earscirev.2013.10.007)
2012
- Avila, S. P. , Ramalho, R. and Vullo, R. 2012. Systematics, palaeoecology and palaeobiogeography of the Neogene fossil sharks from the Azores (Northeast Atlantic). Annales De Paleontologie 98 (3), pp.167-189. (10.1016/j.annpal.2012.04.001)
- Johnson, M. E. et al., 2012. Rhodoliths, uniformitarianism, and Darwin: Pleistocene and Recent carbonate deposits in the Cape Verde and Canary archipelagos. Palaeogeography Palaeoclimatology Palaeoecology 329 , pp.83-100. (10.1016/j.palaeo.2012.02.019)
2011
- Ramalho, R. 2011. Building the Cape Verde Islands. Springer Theses Springer. (10.1007/978-3-642-19103-9)
- Ramalho, R. A. S. and Ramalho, R. A. S. 2011. Constraining the Cape Verde Swell Using Numerical Models. In: Building the Cape Verde Islands. Springer Theses-Recognizing Outstanding PhD Research Springer. , pp.27-46. (10.1007/978-3-642-19103-9_3)
- Ramalho, R. A. S. and Ramalho, R. A. S. 2011. Dating of Sea-Level Palaeo-Markers. In: Building the Cape Verde Islands. Springer Theses-Recognizing Outstanding PhD Research Springer. , pp.139-176. (10.1007/978-3-642-19103-9_6)
2010
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Ymchwil
Mae fy ymchwil yn canolbwyntio ar geodynameg a pheryglon llosgfynyddoedd ynysoedd cefnfor. Yn gyffredinol, rwy'n defnyddio dull integreiddiol ar y tir, gan gyfuno arsylwadau maes gyda geocronoleg a dadansoddiadau meintiol i ddatrys esblygiad llosgfynyddoedd ynysoedd cefnfor a'u tirweddau, ar wahanol raddfeydd amser a gofodol. Yn hanfodol, mae fy ngwaith yn canolbwyntio fwyfwy ar ymchwilio i'r potensial perygl a achosir gan losgfynyddoedd ynysoedd, o dan lu o safbwyntiau. Mae fy ngweithgareddau ymchwil felly yn rhychwantu amrywiaeth o bynciau, yn bennaf:
Esblygiad ynys y cefnfor, magmatiaeth a pherygl folcanig
Rwy'n cael fy swyno gan sut mae llosgfynyddoedd ynysoedd cefnfor yn esblygu trwy ofod ac amser, fel swyddogaeth y rhyngweithio cyfannol rhwng geodynameg mewnol a ffactorau allanol. Mae gen i ddiddordeb arbennig yn esblygiad llosgfynyddoedd ynysoedd cefnforol a mannau poeth cefnforol sydd wedi'u lleoli mewn amgylcheddau platiau llonydd neu sy'n symud yn araf mewn perthynas â'u ffynhonnell toddi (e.e. Cape Verde, Madeira a Canaries), neu o'r rhai sydd wedi'u lleoli'n agos at gribau canol cefnfor a chyffyrdd triphlyg (e.e. Azores).
Yn y lleoliadau hyn mae fy ymchwil yn canolbwyntio'n bennaf ar sut mae prosesau folcanig ac ymwthiol cystadleuol yn llywodraethu twf ynysoedd, sut mae hanesion dyrchafiad / ymsuddiant cymhleth yn adlewyrchu newidiadau episodig mewn ymddygiad system magmatig, a sut nad yw'r diffyg folcaniaeth yn adlewyrchu quiescence magmatig. Rwyf hefyd yn cyfrannu at ymchwil sy'n integreiddio data daearegol/geodetig/geoffisegol/synhwyro o bell i ddeall prosesau ymwthiol gweithredol a'u mynegiant arwyneb. Yn ogystal, rwyf wedi bod yn edrych ar sut y gall ynysoedd ger rhwygiadau gael eu dinistrio gan brosesau tectonig.
O ran perygl folcanig, mae fy ymchwil yn canolbwyntio ar y defnydd o arolygon bathymetrig cydraniad uchel wrth lunio asesiadau peryglon folcanig solet ar ynysoedd folcanig, ac ar fodiwleiddio perygl folcanig mewn llosgfynyddoedd ynysoedd cefnforol hydroligaidd, gyda chysylltiadau ag amrywioldeb hinsawdd.
Potensial perygl tsunamis llosgfynyddoedd
Yn ddiweddar, rydym wedi dangos bod cwymp ystlys yn Fogo - un o'r llosgfynyddoedd cefnforol mwyaf gweithgar ar y Ddaear - wedi sbarduno tsunami mawr gyda chanlyniadau enbyd ar ~73 ka. Mae'r darganfyddiad hwn yn darparu llinell arall o dystiolaeth bod cwympiadau ystlys folcanig yn wir yn gallu sbarduno megatsunamis, gan fynd i'r afael â dadl ffyrnig dros eu potensial perygl gwirioneddol.
Ar hyn o bryd rwy'n arwain menter ymchwil ryngwladol amlddisgyblaethol iawn i ymchwilio i effaith ranbarthol y tsunami hwn, ynghyd ag ymchwiliad manwl i'r ffynhonnell, gyda'r nod o ymgorffori cyfyngiadau ffisegol mewn modelau rhifiadol newydd, mwy cadarn ar gyfer cynhyrchu, lluosogi ac effaith tsunamis llosgfynyddol.
Trwy'r ymchwil hon, rydym yn gobeithio ateb 3 o'r cwestiynau mwyaf sylfaenol sy'n rhwystro ein dealltwriaeth wyddonol o berygl megatsunami: (1) beth yw maint cychwynnol y tonnau hyn (mewn perthynas â'u fflwcs cyfaint)? (2) pa mor gyflym maen nhw'n diflannu wrth iddynt luosogi i'r pellter? h.y. a ydyn nhw'n gallu gwneud difrod sylweddol ar draws basnau cefnfor? (3) Pa mor aml yw'r digwyddiadau hyn?
Rydym hefyd yn gweithio i sefydlu meini prawf mwy cadarn i nodi dyddodion tsunami ar ynysoedd folcanig ac echdynnu paramedrau ystyrlon wrth ailadeiladu digwyddiadau.
Rydym hefyd yn archwilio'r potensial perygl sy'n gysylltiedig â tsunamis llai ond llawer mwy aml a ysgogwyd gan fethiannau clogwyni arfordirol, gan ddefnyddio dull integreiddiol cydraniad uchel ar y tir/ar y môr ynghyd â modelu rhifiadol. Y syniad yw defnyddio enghreifftiau hanesyddol i raddnodi offer rhifiadol ar gyfer dadansoddi peryglon a risg o'r math hwn o ddigwyddiadau.
Rydym hefyd wedi ymchwilio yn ddiweddar i'r tsunami a gynhyrchwyd gan ffrwydrad anferthol Hunga Tonga Hunga Ha'apai yn y Cefnfor Tawel a dangos bod hwn yn tsunami gwirioneddol fyd-eang a gynhyrchwyd gan ffynhonnell atmosfferig sy'n symud yn gyflym lle mae tonnau disgyrchiant acwstig sy'n pelydru o'r ffrwydrad yn cyffroi'r cefnfor ac yn trosglwyddo egni i mewn iddo trwy gyseiniant. Mae'r mecanwaith awyr-dŵr hwn yn esbonio amseroedd teithio anarferol o gyflym a hyd hir y tsunami, yn ogystal â'i gyrhaeddiad byd-eang, gan arwain hefyd at donnau uwch ar hyd masau tir sy'n codi'n sydyn o ddarnau hir o ddyfroedd dwfn y cefnfor.
Esblygiad arfordirol, erydiad, dynameg gwaddodion silffoedd, a bioddaearyddiaeth ynysoedd
Mae fy ngwaith yn hynod amlddisgyblaethol ac yn cynnwys cyfraniadau i feysydd prosesau wyneb y Ddaear, peryglon amgylcheddol, ac yn enwedig gwyddoniaeth arfordirol. Mae gen i ddiddordeb arbennig mewn sut mae arfordiroedd a silffoedd ynysoedd folcanig yn esblygu fel swyddogaeth folcaniaeth, gwastraffu torfol, erydiad, gwaddodion a rhyngweithio â phrosesau biolegol.
Rydym bellach yn gweithio i gynnig mwy o fewnwelediadau meintiol i'r pwnc, sef trwy fwy o ddefnydd o ddull cyfunol ar y tir / ar y môr, gan gysylltu gwaith maes ar y tir â geoffiseg forol cydraniad uchel iawn, a thrwy ymgorffori'r datblygiadau diweddaraf mewn modelu rhifiadol geomorffolegol yn ein dadansoddiad.
Rwyf hefyd yn cydweithio'n weithredol â biolegwyr a phaleontolegwyr wrth astudio biotas morol ynysig ffosil ac ar ddylanwad ontogeny ynysoedd ac osgiliadau rhewlifer-ewstatig mewn patrymau bioddaearyddiaeth forol.
Prosiectau Ymchwil Gweithredol
- LACAVA: Pensaernïaeth lithosfferig - mantell, cramen, a gwaddodol - o'r
Mae Cape Verde Archipelago yn darparu mewnwelediadau unigryw i adeiladu llosgfynydd hotspot. Grant NSFGEO-NERC, $ 365k + £ 268k. Rôl: UK PI. - PLUS - Plymio Plu Samoa: Craidd dril ar Ynys Savai'i, Samoa i archwilio rhyngweithiadau hotspot-ffos, ailgylchu cyfandirol, y biosffer dwfn, ac adnoddau geothermol. Gweithdy ICDP, $ 103k. Rôl: PI.
- ExTRAP – Astudiaeth archwilio o Gofnodion Tephra ym mawndiroedd yr Azores. Grant Prosiect Archwiliadol FCT Portiwgal, € 50k. Rôl: Co-I.
- VOLCAMOTION: Astudiaeth o'r mecanweithiau sy'n rheoli sbarduno, cyflymu ac arestio ystlysau llosgfynydd ynysoedd cefnfor sy'n cwympo. Grant Safonol MCI (Sbaen), € 162k. Rôl: Co-I (Partner Rhyngwladol).
- A yw Ynys y Pasg (Rapa Nui) yn dal i fod yn weithredol? Yn dilyn olion ei folcaniaeth ddiweddar. Grant Safonol NARD (Chile), $ 180k. Rôl: Co-I (Partner Rhyngwladol).
- GEMMA - gwella Modelau GEodynamig yn MAcaronesia trwy gysoni data geodetig, geoffisegol a daearegol. Grant Safonol FCT Portiwgal, € 250k. Rôl: Co-I.
- Ymchwiliadau geoffisegol a daearegol integredig o gwympiadau ystlys folcanig yn archipelago deheuol Cape Verdes: Tarddiad, maint a photensial tsunami. Grant Safonol DFG (Yr Almaen), € 360k. Rôl: Co-I (Partner Rhyngwladol).
Prosiectau Ymchwil Blaenorol:
- PERYGLUS - Gwerthuso PERYGLON sy'n gysylltiedig â ffurfio a datblygu "fajãs" detrital a lavic yn archipelago folcanig POrtugUese. Grant Safonol FCT Portiwgal, € 250k (2021–2025). Rôl: Cyd-PI.
- Plu folcanig o wely'r môr i ymyl y gofod. Grant Generadur GW4, £20k. Rôl: Co-PI
- Mecaneg ymyrraeth clawdd mewn lleoliadau tectonig llithro oblique: Datgelu achosion haid seismig prin Mawrth 2022 yn Ynys São Jorge, Azores. Grant Brys NERC, £100k. Rôl: Co-PI
- UNTIeD - UNlocking the megaTsunamI Deadlock: defnyddio'r effeithiau agos at y ffynhonnell i gyfyngu ar gynhyrchu tsunami gan gwympiadau ystlys folcanig. Grant Safon FCT Portiwgal wedi'i gyd-ariannu gan FEDER (POR Lisboa 2020), € 240k (2018–2022). Rôl: PI.
- MEGAWAVE – Unravelling the danger potential of tsunamis triggered by volcanic flank collapses. Grant Safonol FCT Portiwgal, € 260k (2016–2021). Rôl: PI.
- Mordaith RV METEOR M155 - Cwymp ystlys disgyrchiant tsunamigenic llosgfynydd Fogo, Ynysoedd Cape Verde. Ariannwyd gan DFG, €169k (2019). Rôl: Cyd-PI.
- GOLWG - Cyfyngiadau seismig a geocemegol ar system HoTspot Madeira. Grant Safonol FCT Portiwgal, € 250k (2018–2022). Rôl: Co-I.
- PLATMAR - Datblygu silffoedd ynysoedd folcanig: mewnwelediadau o Ynys Sta. Maria a goblygiadau ar asesu peryglon, mapio cynefinoedd a rheoli agregau morol. Grant Safonol FCT Portiwgal, € 200k (2016–2020). Rôl: Cyd-I ac Arweinydd Tasg.
- TÂN - Llosgfynydd Ynys Fogo: AIL-chwilio amlddisgyblaethol ar Ffrwydrad 2014/15. Grant Safonol FCT Portiwgal, € 200k (2016–2020). Rôl: Cyd-I ac Arweinydd Tasg.
- Rhodoliths o Archipelago Cape Verde: mewnwelediadau i newid yn yr hinsawdd a dynameg gwaddodion megatsunami. Ariannwyd gan DFG, €20k (2018–2021). Rôl: Co-I.
- ISLAND FREEBOARD - Beth all isostasy ynys ei ddweud wrthym am ddeinameg hotspot. FP7 Marie Curie Fellwoship wedi'i ariannu gan yr ERC, €272k (2013-2016).
- Ymchwiliad i Ynys Uplift rhanbarth Ynys yr Azores. Ariannwyd gan DFG, €150k (2011–2013). Rôl: Co-I.
Addysgu
Rwy'n addysgu amrywiaeth o bynciau ar draws geowyddorau, yn enwedig mewn themâu sy'n ymwneud â geoperyglon, geodynameg, geomorffoleg, folcaniaeth, a sgiliau maes.
Ar hyn o bryd rwy'n addysgu yn y modiwlau canlynol:
EA1300 Byd Amgylcheddau Dynamig (Blwyddyn 1)
EA2301 Gwaith Maes Daearegol, Dadansoddi Data a Sgiliau Proffesiynol (Blwyddyn 2)
EA3306 Daeareg Amgylcheddol Uwch (Blwyddyn 3)
EAT406 Asesiad Risg (MSc Peryglon Amgylcheddol)
EAT408 Astudiaethau Achos Peryglon Amgylcheddol (MSc Peryglon Amgylcheddol)
EAT409 Synhwyro o Bell o Beryglon a Risgiau (MSc Peryglon Amgylcheddol)
Rwyf hefyd yn goruchwylio prosiectau traethawd hir yn y modiwlau canlynol:
EA4301-4303 Traethawd ymchwil MSci
Traethawd hir EAT401 (MSc Peryglon Amgylcheddol)
Rwyf hefyd yn cyfrannu at gydrannau maes y modiwlau canlynol:
EA1304 Gwaith Maes Gwyddor Daear
EA2301/EA2302 Gwaith Maes Daearegol/Daearegol Cymhwysol, Dadansoddi Data a Sgiliau Proffesiynol
Cyfraniadau addysgu yn y gorffennol yng Nghaerdydd:
EAT402 Peryglon Amgylcheddol mewn Byd sy'n Newid (MSc Peryglon Amgylcheddol)
EAT411 Astudiaethau Achos Peryglon Amgylcheddol a Dŵr (MSc Peryglon Amgylcheddol)
Bywgraffiad
Rolau Academaidd:
2024: Uwch Ddarlithydd, Prifysgol Caerdydd
2021: Darlithydd, Prifysgol Caerdydd
2016: Uwch Gymrawd Ymchwil a Darlithydd Gwahoddedig, Instituto Dom Luiz, Prifysgol Lisbon
2013: Marie Curie Independent Outgoing Research Fellow, Prifysgol Bryste ac Arsyllfa Ddaear Lamont-Doherty Prifysgol Columbia
2011: Cynorthwy-ydd Ymchwil Ôl-ddoethurol, Prifysgol Münster
Rolau Honorary/Adjunct:
Ymchwilydd Anrhydeddus a Darlithydd Gwahoddedig yn Instituto Dom Luiz, Prifysgol Lisbon (Portiwgal).
Addysg
2010: PhD Gwyddorau Daear, Prifysgol Bryste
2004: MSc Daeareg Ddeinamig , Prifysgol Lisbon
2001: Bl. (Hons) Daeareg, Prifysgol Lisbon
Anrhydeddau a dyfarniadau
- Springer Thesis Award (2011) - one of a few selected outstanding PhD theses from around the world and across the physical sciences in 2011.
- Runners-up Best Talk (2007) at the British Geophysical Association Postgraduate Research in Progress Meeting, 2-4 September 2007, Cardiff.
Aelodaethau proffesiynol
- 2007 – present: Fellow of the Geological Society of London
- 2008 – present: member of the American Geophysical Union
- 2011 – present: member of the European Geosciences Union
- 2012 – present: member of the International Association of Volcanology and Chemistry of Earth's Interior
Meysydd goruchwyliaeth
I am interested in supervising PhD, MSc and MSCi students in the areas of:
- Geo-environmental hazards
- Volcanology & volcanic geology
- Geomorphology of volcanic landscapes
- Oceanic plate geodynamics & hotspots
- Coastal evolution of rocky shores
- Island geological/biological co-evolution
Goruchwyliaeth gyfredol
Prosiectau'r gorffennol
Prosiectau PhD
Mariana Andrade, PhD (2018-2023) "Perygl folcanig mewn llosgfynyddoedd Ocean Island wedi'u gwefru yn hydrolig - achos Ynys Flores (Azores)". Rôl: Goruchwyliwr Arweiniol.
Prosiectau MSc/MSci
Ella Courtney, MSc (2025) "Meintioli ansicrwydd yn yr asesiad perygl o ddadgasio CO2 folcanig gwasgaredig".
Rôl: Goruchwyliwr Arweiniol.
Sophia Read, MSc (2025) "An Investigation of Overtopping at Whitmore Bay and the Knap, South Wales".
Rôl: Goruchwyliwr Arweiniol.
Cariad Morgan, MSc (2024) "Ymchwilio i Beryglon Lludw Folcanig o Losgfynydd Santa Barbara, Ynys Terceira, Azores." Rôl: Goruchwyliwr Arweiniol.
Oliver Allsop, MSc (2024) "Asesu Risg Folcanig ar Ynys São Jorge: Efelychiadau Llif Lafa a Strategaethau Lliniaru". Rôl: Goruchwyliwr Arweiniol.
Eliza Dennis, MSc (2023) "Ymchwilio i berygl folcanig ar Ynys Flores, Azores". Rôl: Goruchwyliwr Arweiniol.
Ben Nursey, MSc (2023) "Y perygl a achosir gan wastraffu màs clogwyni arfordirol tsunamigenig yn Ynys Flores, Azores". Rôl: Goruchwyliwr Arweiniol.
Megan Hall (2023) "Tystiolaeth ar gyfer effeithiau tonnau eithafol (storm a tsunami) ar Ynys Sal, Cape Verde". Rôl: Goruchwyliwr Arweiniol.
Owen Rees, MSci (2022) "Meintioli effaith erydiad arfordirol ar delta lafa o Pico, Azores". Rôl: Goruchwyliwr Arweiniol.
Heidi Brice, MSci (2020-21) "Perygl tirlithriad mewn llosgfynyddoedd ynysoedd cefnfor: achos Tope de Coroa (Santo Antão, Ynysoedd Cape Verde)". Rôl: Goruchwyliwr Arweiniol.
Ana Teves, MSc (2017-18) "Llifoedd lafa hanesyddol o Fogo Volcano: mapio cydraniad uchel a dadansoddiad geomorffolegol". Rôl: Cyd-oruchwyliwr.
Carlos Melo, MSc (2014-16) "Tarddiad ac esblygiad llwyfannau talws arfordirol (fajãs) gyda systemau morlyn". Rôl: Cyd-oruchwyliwr (Goruchwyliwr Arweiniol dros dro).
Katrien Spieker, MSc (2011-12) "Swyddogaethau derbynnydd Azores a Moroco". Rôl: Cyd-oruchwyliwr.
Prosiectau Blwyddyn 3
Charlotte Gibson (2022-23) "Effeithiau amgylcheddol posibl safleoedd tirlenwi Madeley Heath a Yew Tree Farm". Rôl: Goruchwyliwr Arweiniol.
Grace Keats (2023-24) "Beth yw'r halogion posibl sy'n gysylltiedig â'r hen safle tirlenwi pwll clai yn Bicester, ac a ydyn nhw'n peri risg annerbyniol i'r derbynyddion?". Rôl: Goruchwyliwr Arweiniol.
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Contact Details
[email protected]
+44 29208 75367
Y Prif Adeilad, Llawr 3, Ystafell 3.16, Plas y Parc, Caerdydd, CF10 3AT
+44 29208 75367
Y Prif Adeilad, Llawr 3, Ystafell 3.16, Plas y Parc, Caerdydd, CF10 3AT
Themâu ymchwil
Arbenigeddau
- Daeareg
- Llosgfynyddoedd
- Peryglon naturiol
- Ynysoedd Oceanic
- Tsunamis
