Associate Professor Helen Bostock Lyman
Associate Professor

Helen Bostock Lyman

Email: 
Phone: 
+61 7 336 56082

Background

The focus of my research is on the oceanography and paleoceanography. I use stable isotopes (oxygen, carbon), geochemical tracers, sedimentology and microfossils to understand the present and past changes in ocean chemistry to reconstruct ocean circulation (changes in ocean currents and fronts) and its relationship to global climate. I am particularly interested in understanding past changes in the Great Barrier Reef, and at the other extreme past changes in processe at the Antarctic Margin. I am also interested in mapping marine sediment distribution, sediment transport processes, marine geomorphology, and multidisciplinary topics such as ocean acidification (the uptake of CO2 by the oceans) and climate change in the oceans (marine heat waves, sea level rise), and paleoseismicity (using sedimentary records to reconstruct the history of past earthquakes). My research has focussed on the southwest Pacific (Coral Sea, Tasman Sea and South Pacific) and Southern Ocean. I have participated in a number of research voyages on open ocean vessels including the RV Tangaroa and RV Investigator, including several as lead or co-lead scientist.

Helen Bostock joined the University of Queensland in July 2019 from the National Institute of Water and Atmospheric Research in New Zealand (2006-2019). Prior to this she worked as a researcher in the Coastal CRC at Geoscience Australia in Canberra (2004-2006).

Availability

Associate Professor Helen Bostock Lyman is:
Available for supervision
Media expert

Fields of research

Chemical oceanography Earth Sciences Oceanography

Qualifications

  • Doctor of Philosophy, Australian National University

Research interests

  • Past changes in the Southern Ocean

    I am interested in past changes in ocean circulation in the Southern Ocean over glacial/interglacial timescales (1000s-100,000s years). I use proxy evidence from sedimentary characteristics, microfossil assemblages, stable isotopes (carbon, oxygen, nitrogen and boron), elemental variations from a latitudinal transect of marine sediment cores from the subtropical waters of the southwest Pacific to the continental margin of Antarctica. I try to reconstruct changes in temperature, biological productivity, changes in water masses, ocean currents and fronts, sea ice, ice sheet retreat, and how all these different processes are linked to global climate.

  • Geological history of the Great Barrier Reef

    I am interested in the initiation and development of the Great Barrier Reef using proxies (sedimentology, microfossil assemblages, stable isotopes, geochemistry) from marine sediment cores offshore. The aim is to understand the timing of the reef development, but also to understand the broader regional ocean circulation of the Coral Sea over glacial/interglacial timescales (1000s-100,000s-1,000,000 years).

  • The carbon cycle in the ocean and ocean acidification

    I look at the geochemistry of the water column, primarily the carbonate chemistry and carbon isotopes, to understand changes in the ocean carbon cycle over recent decades due to the uptake of anthropogenic CO2 from the atmosphere. This results in a decline in the pH in the ocean, a process known as ocean acidification. I also work with collaborators using Boron isotopes of microfossils in marine sediment cores to understand how pH and carbonate concentrations have changed over glacial/interglacial timescales.

  • Sedimentary processes in the ocean

    I look at the distribution of sediment in the marine environment from coastal to the deep ocean. The sediment type is dependent on the local source from nearby rivers, as well as biological productivity (e.g. shells and skeletons) and authigenic sediment (geochemically precipitated out of the seawater). Sediment is redistributed by gravity and ocean currents. The distribution of sediment in the marine environment is important to determine marine benthic (seafloor) habitats. The recurrence of gravity transported sediment (called turbidites or debrites) along tectonically active continental margins has been used to study the frequency of large earthquakes.

Research impacts

The work undertaken as part of the Coastal CRC (https://ozcoasts.org.au/) looked at several different coastal enviroments around Australia to understand the impact of recent sediment and contaminants on the local ecosystems, such as the Great Barrier Reef.

I have developed datasets of the carbonate chemistry and sediment maps of the southwest Pacific, which have been widely used by marine ecologists to understand the habitats of marine organisms that live on the seafloor. These datasets have been used to identify the potential distribution of deep marine vulnerable marine ecosystems in the South Pacific. I have also been involved in a New Zealand project CARIM (Coastal Acidification: Rates, Impacts and Mitigation) to determine the variability of pH and carbonate chemistry of the coastal regions. These projects have Maori and regional government stakeholders that will be using this information to develop future strategic management plans.

I have also been involved in a large project to understand recurrence of large earthquakes on the Hikurangi Subduction Margin, east coast of the New Zealand north island. This project is using a suite of cores from across the margin to look at the frequency of sedimentary gravity flows (turbidites), to determine the occurrence of earthquakes along this margin to develop hazard models for the east coast of the North Island communities and New Zealand government.

Search Professor Helen Bostock Lyman’s works on UQ eSpace

107 works between 2004 and 2024
All (107) Journal Article (100) Book Chapter (3) Conference Publication (4)

21 - 40 of 107 works

2022

Journal Article

Blood, lead and spheres: a hindered settling equation for sedimentologists based on metadata analysis

Baas, Jaco H., Baker, Megan L., Buffon, Patricia, Strachan, Lorna J., Bostock, Helen C., Hodgson, David, Eggenhuisen, Joris T. and Spychala, Yvonne T. (2022). Blood, lead and spheres: a hindered settling equation for sedimentologists based on metadata analysis. Depositional Record, 8 (2), 603-615. doi: 10.1002/dep2.176

Blood, lead and spheres: a hindered settling equation for sedimentologists based on metadata analysis

2022

Book Chapter

Water masses, circulation and change in the modern Southern Ocean

Carter, Lionel, Bostock-Lyman, Helen and Bowen, Melissa (2022). Water masses, circulation and change in the modern Southern Ocean. Antarctic Climate Evolution. (pp. 165-197) Amsterdam, Netherlands: Elsevier. doi: 10.1016/b978-0-12-819109-5.00003-7

Water masses, circulation and change in the modern Southern Ocean

2021

Journal Article

Southern Ocean contribution to both steps in deglacial atmospheric CO2 rise

Ronge, Thomas A., Frische, Matthias, Fietzke, Jan, Stephens, Alyssa L., Bostock, Helen and Tiedemann, Ralf (2021). Southern Ocean contribution to both steps in deglacial atmospheric CO2 rise. Scientific Reports, 11 (1) 22117, 22117. doi: 10.1038/s41598-021-01657-w

Southern Ocean contribution to both steps in deglacial atmospheric CO2 rise

2021

Journal Article

The Southern Ocean Radiolarian (SO-RAD) dataset: a new compilation of modern radiolarian census data

Lawler, Kelly-Anne, Cortese, Giuseppe, Civel-Mazens, Matthieu, Bostock, Helen, Crosta, Xavier, Leventer, Amy, Lowe, Vikki, Rogers, John and Armand, Leanne K. (2021). The Southern Ocean Radiolarian (SO-RAD) dataset: a new compilation of modern radiolarian census data. Earth System Science Data, 13 (11), 5441-5453. doi: 10.5194/essd-13-5441-2021

The Southern Ocean Radiolarian (SO-RAD) dataset: a new compilation of modern radiolarian census data

2021

Journal Article

Calibrating the marine turbidite palaeoseismometer using the 2016 Kaikōura earthquake

Howarth, Jamie D., Orpin, Alan R., Kaneko, Yoshihiro, Strachan, Lorna J., Nodder, Scott D., Mountjoy, Joshu J., Barnes, Philip M., Bostock, Helen C., Holden, Caroline, Jones, Katie and Cağatay, M. Namik (2021). Calibrating the marine turbidite palaeoseismometer using the 2016 Kaikōura earthquake. Nature Geoscience, 14 (3), 161-167. doi: 10.1038/s41561-021-00692-6

Calibrating the marine turbidite palaeoseismometer using the 2016 Kaikōura earthquake

2021

Journal Article

Compiled Southern Ocean sea surface temperatures correlate with Antarctic Isotope Maxima

Anderson, H. J., Pedro, J. B., Bostock, H. C., Chase, Z. and Noble, T. L. (2021). Compiled Southern Ocean sea surface temperatures correlate with Antarctic Isotope Maxima. Quaternary Science Reviews, 255 106821, 106821. doi: 10.1016/j.quascirev.2021.106821

Compiled Southern Ocean sea surface temperatures correlate with Antarctic Isotope Maxima

2021

Journal Article

Seasonal and interannual variability of the Subtropical Front in the New Zealand region

Behrens, Erik, McC. Hogg, Andrew, England, Matthew H. and Bostock, Helen (2021). Seasonal and interannual variability of the Subtropical Front in the New Zealand region. Journal of Geophysical Research: Oceans, 126 (2) 2020JC016412. doi: 10.1029/2020jc016412

Seasonal and interannual variability of the Subtropical Front in the New Zealand region

2021

Journal Article

Frontal dynamics and water mass variability on the Campbell Plateau

Forcén-Vázquez, Aitana, Williams, Michael J. M., Bowen, Melissa, Carter, Lionel and Bostock, Helen (2021). Frontal dynamics and water mass variability on the Campbell Plateau. New Zealand Journal of Marine and Freshwater Research, 55 (1), 199-222. doi: 10.1080/00288330.2021.1875490

Frontal dynamics and water mass variability on the Campbell Plateau

2021

Journal Article

Early deglacial CO2 release from the Sub-Antarctic Atlantic and Pacific oceans

Shuttleworth, R., Bostock, H.C., Chalk, T.B., Calvo, E., Jaccard, S.L., Pelejero, C., Martínez-García, A. and Foster, G.L. (2021). Early deglacial CO2 release from the Sub-Antarctic Atlantic and Pacific oceans. Earth and Planetary Science Letters, 554 116649, 116649. doi: 10.1016/j.epsl.2020.116649

Early deglacial CO2 release from the Sub-Antarctic Atlantic and Pacific oceans

2021

Journal Article

Timing of seafloor spreading cessation at the Macquarie Ridge Complex (SW Pacific) and implications for upper mantle heterogeneity

Jiang, Qiang, Merle, Renaud E., Jourdan, Fred, Olierook, Hugo K. H., Whitehouse, Martin J., Evans, Katy A., Wang, Xuan‐Ce, Conway, Chris E., Bostock, Helen C. and Wysoczanski, Richard J. (2021). Timing of seafloor spreading cessation at the Macquarie Ridge Complex (SW Pacific) and implications for upper mantle heterogeneity. Geochemistry, Geophysics, Geosystems, 22 (1) e2020GC009485. doi: 10.1029/2020gc009485

Timing of seafloor spreading cessation at the Macquarie Ridge Complex (SW Pacific) and implications for upper mantle heterogeneity

2021

Journal Article

Origin of geochemically heterogeneous mid-ocean ridge basalts from the Macquarie Ridge Complex, SW Pacific

Jiang, Qiang, Merle, Renaud E., Jourdan, Fred, Olierook, Hugo K.H., Chiaradia, Massimo, Evans, Katy A., Wang, Xuan-Ce, Conway, Chris E., Bostock, Helen C. and Wysoczanski, Richard J. (2021). Origin of geochemically heterogeneous mid-ocean ridge basalts from the Macquarie Ridge Complex, SW Pacific. Lithos, 380-381 105893, 1-18. doi: 10.1016/j.lithos.2020.105893

Origin of geochemically heterogeneous mid-ocean ridge basalts from the Macquarie Ridge Complex, SW Pacific

2020

Journal Article

The flux and provenance of dust delivered to the SW Pacific during the Last Glacial Maximum

Trudgill, M. D., Shuttleworth, R., Bostock, H. C., Burke, A., Cooper, M. J., Greenop, R. and Foster, G. L. (2020). The flux and provenance of dust delivered to the SW Pacific during the Last Glacial Maximum. Paleoceanography and Paleoclimatology, 35 (12) e2020PA003869. doi: 10.1029/2020pa003869

The flux and provenance of dust delivered to the SW Pacific during the Last Glacial Maximum

2020

Journal Article

The sensitivity of the Antarctic Ice Sheet to a changing climate: Past, present and future

Noble, T. L., Rohling, E. J., Aitken, A. R. A., Bostock, H. C., Chase, Z., Gomez, N., Jong, L. M., King, M. A., Mackintosh, A. N., McCormack, F. S., McKay, R. M., Menviel, L., Phipps, S. J., Weber, M. E., Fogwill, C. J., Gayen, B., Golledge, N. R., Gwyther, D. E., Hogg, A. Mc C., Martos, Y. M., Pena‐Molino, B., Roberts, J., Flierdt, T. and Williams, T. (2020). The sensitivity of the Antarctic Ice Sheet to a changing climate: Past, present and future. Reviews of Geophysics, 58 (4) e2019RG000663, 1-89. doi: 10.1029/2019rg000663

The sensitivity of the Antarctic Ice Sheet to a changing climate: Past, present and future

2020

Journal Article

Limited variability in the phytoplankton Emiliania huxleyi since the pre-industrial era in the Subantarctic Southern Ocean

Rigual-Hernández, A. S., Sánchez-Santos, J. M., Eriksen, R., Moy, A. D., Sierro, F. J., Flores, J. A., Abrantes, F., Bostock, H., Nodder, S. D., González-Lanchas, A. and Trull, T. W. (2020). Limited variability in the phytoplankton Emiliania huxleyi since the pre-industrial era in the Subantarctic Southern Ocean. Anthropocene, 31 100254, 100254. doi: 10.1016/j.ancene.2020.100254

Limited variability in the phytoplankton Emiliania huxleyi since the pre-industrial era in the Subantarctic Southern Ocean

2020

Journal Article

Late Quaternary climate variability and change from Aotearoa New Zealand speleothems: progress in age modelling, oxygen isotope master record construction and proxy-model comparisons

Lorrey, Andrew M., Williams, Paul W., Woolley, John-Mark, Fauchereau, Nicolas C., Hartland, Adam, Bostock, Helen, Eaves, Shaun, Lachniet, Matthew S., Renwick, James A. and Varma, Vidya (2020). Late Quaternary climate variability and change from Aotearoa New Zealand speleothems: progress in age modelling, oxygen isotope master record construction and proxy-model comparisons. Quaternary, 3 (3) 24, 24. doi: 10.3390/quat3030024

Late Quaternary climate variability and change from Aotearoa New Zealand speleothems: progress in age modelling, oxygen isotope master record construction and proxy-model comparisons

2020

Journal Article

Ageing Deep-Sea Black Coral Bathypathes patula

Marriott, Peter, Tracey, Dianne Margaret, Bostock, Helen, Hitt, Nicholas and Fallon, Stewart J. (2020). Ageing Deep-Sea Black Coral Bathypathes patula. Frontiers in Marine Science, 7 479. doi: 10.3389/fmars.2020.00479

Ageing Deep-Sea Black Coral Bathypathes patula

2020

Journal Article

Coupled evolution of stable carbon isotopes between the Southern Ocean and the atmosphere over the last 260 ka

Hu, Rong, Bostock, Helen C., Greaves, Mervyn, Piotrowski, Alexander M. and McCave, I. Nicholas (2020). Coupled evolution of stable carbon isotopes between the Southern Ocean and the atmosphere over the last 260 ka. Earth and Planetary Science Letters, 538 116215, 116215. doi: 10.1016/j.epsl.2020.116215

Coupled evolution of stable carbon isotopes between the Southern Ocean and the atmosphere over the last 260 ka

2020

Journal Article

Coccolithophore biodiversity controls carbonate export in the Southern Ocean

Rigual Hernandez, Andres S., Trull, Thomas W., Nodder, Scott D., Flores, Jose A., Bostock, Helen, Abrantes, Fatima, Eriksen, Ruth S., Sierro, Francisco J., Davies, Diana M., Ballegeer, Anne-Marie, Fuertes, Miguel A. and Northcote, Lisa C. (2020). Coccolithophore biodiversity controls carbonate export in the Southern Ocean. Biogeosciences, 17 (1), 245-263. doi: 10.5194/bg-17-245-2020

Coccolithophore biodiversity controls carbonate export in the Southern Ocean

2019

Journal Article

Hydrodynamics and sediment transport on the North Canterbury Shelf, New Zealand

Nokes, Cowan R., Bostock, Helen C., Strachan, Lorna J. and Hadfield, Mark G. (2019). Hydrodynamics and sediment transport on the North Canterbury Shelf, New Zealand. New Zealand Journal of Marine and Freshwater Research, 55 (1), 1-20. doi: 10.1080/00288330.2019.1699584

Hydrodynamics and sediment transport on the North Canterbury Shelf, New Zealand

2019

Journal Article

Paleoproductivity in the SW Pacific Ocean during the early Holocene climatic optimum

Bostock, H. C., Prebble, J. G., Cortese, G., Hayward, B., Calvo, E., Quirós-Collazos, L., Kienast, M. and Kim, K. (2019). Paleoproductivity in the SW Pacific Ocean during the early Holocene climatic optimum. Paleoceanography and Paleoclimatology, 34 (4), 580-599. doi: 10.1029/2019PA003574

Paleoproductivity in the SW Pacific Ocean during the early Holocene climatic optimum

Current funding

  • 2023 - 2025
    Australian Membership of the International Ocean Discovery Program 2023-24 (ARC LIEF administered by The Australian National University)
    Australian National University
    Open grant
  • 2022 - 2025
    Is there a climatic tipping point for Antarctic Bottom Water formation?
    ARC Discovery Projects
    Open grant
  • 2022 - 2025
    Millennial climate change in southern Australia during the Last Glacial (ARC Discovery Project administered by the University of Melbourne)
    University of Melbourne
    Open grant

Past funding

  • 2021 - 2023
    Australian Membership of the International Ocean Discovery Program (ARC LIEF project administered by ANU)
    Australian National University
    Open grant
  • 2020 - 2023
    Ocean circulation and Australian climate change across the Mid-Pleistoscene Transition (MPT)
    Australian National University
    Open grant

Availability

Associate Professor Helen Bostock Lyman is:
Available for supervision

Before you email them, read our advice on how to contact a supervisor.

Available projects

  • Microplastics in Moreton Bay

    Globally we consume and dispose of significant quanitites of plastic. Some of these end up in our water ways and eventually make it to the coast and out into the ocean. This project will look at the distribution, concentration of microplastics in Moreton Bay, Southeast Queensland sediments and waters to determine how much microplastic is getting in to and being trapped in this coastal embayment.

    The student should have an interest in environmental and marine sciences. The project will involve field work, lab work and with the potential for some modelling. The project is joint with the Queensland Alliance for Environmental Health Science at UQ and Engineering School.

  • Oceanography and Paleoceanography of the Coral Sea

    The Coral Sea sits offshore northeast Queensland, Australia, and has a strong influence on the Great Barrier Reef and other reefs within the large Coral Sea Marine Park. However, we still have little understanding of the oceanography and paleoceanography of this region and how it has evolved and influenced the development of the reef over the last 1 million years.

    The project will involve analysing oceanographic data from the region, and also lab work to process some recently collected long marine sediment cores from the northern Great Barrier Reef (2022) for their microfossils, sedimentology and stable isotopes.

    This project would require someone with an oceanographic and/or a marine geology/sedimentology/geochemistry background.

  • Changes in the Antarctic Intermediate Water around Australia over the last glacial cycle

    Antarctic Intermediate Water (AAIW) sits at a water depth of 500-1500 m around Australia. This water mass that forms in the Southern Ocean plays an important role in the uptake of carbon and is thought to play an important role in providing nutrients to the subtropics. The AAIW has also been proposed to play an key role in the climate change over glacial cycles. Despite this we know relatively little about this water mass around Australia and how it has changed over time and its influence on the regional climate.

    This project will look at oceanographic data and process a series of marine sediment cores from the Indian, Southern and Pacific oceans to understand past changes in AAIW over the last glacial cycle (~150 ka). The project will involve lab work to process microfossils and stable isotopes and other geochemical proxies.

    The project would suit someone with an oceanography and/or marine geology/sedimentology/micropaleontology background.

Supervision history

Current supervision

  • Doctor Philosophy

    Exploring the interactions of the East Australian Current with canyons

    Principal Advisor

  • Doctor Philosophy

    Reconstructing past environmental changes in the Cape Darnley, East Antarctica, region using microfossils from marine sediment cores

    Principal Advisor

    Other advisors: Dr Kevin Welsh

  • Doctor Philosophy

    Oceanography and modelling on the Cape Darnley region, East Antarctica

    Principal Advisor

Completed supervision

Enquiries

Contact Associate Professor Helen Bostock Lyman directly for media enquiries about:

  • Ocean carbon
  • Oceanography
  • Past climate
  • Seafloor mapping

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