![Alexander Krause BSc (Hons), MSc, PhD, FHEA](https://profiles-cardiff.imgix.net/attachments/6642?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Dr Alexander Krause
(e/fe)
BSc (Hons), MSc, PhD, FHEA
- Ar gael fel goruchwyliwr ôl-raddedig
Timau a rolau for Alexander Krause
Trosolwg
Yn fras, mae gen i ddiddordeb yn esblygiad biogeocemegol system y Ddaear dros amrywiaeth o amserlenni ac yn ceisio deall beth mae hyn yn ei olygu ac wedi ei olygu i fywyd ar y Ddaear, ac a allwn gymhwyso'r wybodaeth hon i ddod o hyd i fywyd mewn mannau eraill yn y Bydysawd. Yn fy ymchwil rwy'n adeiladu modelau rhifiadol o system y Ddaear ac yn cymharu fy nghanlyniadau â data biogeocemegol.
Rwyf hefyd yn gydlynydd rhaglen Daearyddiaeth Amgylcheddol ar gyfer yr adran.
Cyhoeddiad
2025
- Cosslett Kemeny, P. , Krause, A. and Kump, L. 2025. A historical perspective on long-term global biogeochemical box models. In: Coogan, L. A. et al., Hydrothermal Circulation and Seawater Chemistry: Links and Feedbacks. Geophysical Monograph Series Wiley(10.1002/9781394229185.ch12)
- Mills, B. J. et al., 2025. Exploring Neoproterozoic climate and biogeochemical evolution in the SCION model. Global and Planetary Change 249 104791. (10.1016/j.gloplacha.2025.104791)
- Liu, X. et al., 2025. Lithium isotope evidence shows Devonian afforestation may have significantly altered the global silicate weathering regime. Geochimica et Cosmochimica Acta 396 , pp.107-121. (10.1016/j.gca.2025.02.036)
2024
- Krause, A. J. et al. 2024. Modelling sulfate concentrations in the global ocean through Phanerozoic time. Journal of the Geological Society 181 (4)(10.1144/jgs2023-184)
- Krause, A. J. et al. 2024. Publisher correction: enhanced clay formation key in sustaining the middle eocene climatic optimum. Nature Geoscience 17 104. (10.1038/s41561-023-01280-6)
2023
- Pogge von Strandmann, P. A. et al., 2023. Assessing hydrological controls on the lithium isotope weathering tracer. Chemical Geology 642 121801. (10.1016/j.chemgeo.2023.121801)
- Bowyer, F. T. et al., 2023. Biological diversification linked to environmental stabilization following the Sturtian Snowball glaciation. Science Advances 9 (34) eadf9999. (10.1126/sciadv.adf9999)
- Krause, A. J. et al. 2023. Enhanced clay formation key in sustaining the middle eocene climatic optimum. Nature Geoscience 16 , pp.730-738. (10.1038/s41561-023-01234-y)
- Mills, B. J. et al., 2023. Evolution of atmospheric O2 through the Phanerozoic, revisited. Annual Review of Earth and Planetary Sciences 51 (1), pp.253-276. (10.1146/annurev-earth-032320-095425)
2022
- Krause, A. J. et al. 2022. Extreme variability in atmospheric oxygen levels in the late Precambrian. Science Advances 8 (41) eabm8191. (10.1126/sciadv.abm8191)
- Shi, W. et al., 2022. Decoupled oxygenation of the Ediacaran ocean and atmosphere during the rise of early animals. Earth and Planetary Science Letters 591 117619. (10.1016/j.epsl.2022.117619)
- Pogge von Strandmann, P. A. et al., 2022. Lithium isotope behaviour during basalt weathering experiments amended with organic acids. Geochimica et Cosmochimica Acta 328 , pp.37-57. (10.1016/j.gca.2022.04.032)
2020
- Alcott, L. J. et al., 2020. Development of iron speciation reference materials for Palaeoredox analysis. Geostandards and Geoanalytical Research 44 (3), pp.581-591. (10.1111/ggr.12342)
2019
- Mills, B. J. et al., 2019. Modelling the long-term carbon cycle, atmospheric CO2, and Earth surface temperature from late Neoproterozoic to present day. Gondwana Research 67 , pp.172-186. (10.1016/j.gr.2018.12.001)
2018
- Krause, A. J. et al. 2018. Stepwise oxygenation of the Paleozoic atmosphere. Nature Communications 9 (1) 4081. (10.1038/s41467-018-06383-y)
- Zhang, S. et al., 2018. Model based Paleozoic atmospheric oxygen estimates: a revisit to GEOCARBSULF. American Journal of Science 318 (5), pp.557–589. (10.2475/05.2018.05)
Adrannau llyfrau
- Cosslett Kemeny, P. , Krause, A. and Kump, L. 2025. A historical perspective on long-term global biogeochemical box models. In: Coogan, L. A. et al., Hydrothermal Circulation and Seawater Chemistry: Links and Feedbacks. Geophysical Monograph Series Wiley(10.1002/9781394229185.ch12)
Erthyglau
- Mills, B. J. et al., 2025. Exploring Neoproterozoic climate and biogeochemical evolution in the SCION model. Global and Planetary Change 249 104791. (10.1016/j.gloplacha.2025.104791)
- Liu, X. et al., 2025. Lithium isotope evidence shows Devonian afforestation may have significantly altered the global silicate weathering regime. Geochimica et Cosmochimica Acta 396 , pp.107-121. (10.1016/j.gca.2025.02.036)
- Krause, A. J. et al. 2024. Modelling sulfate concentrations in the global ocean through Phanerozoic time. Journal of the Geological Society 181 (4)(10.1144/jgs2023-184)
- Krause, A. J. et al. 2024. Publisher correction: enhanced clay formation key in sustaining the middle eocene climatic optimum. Nature Geoscience 17 104. (10.1038/s41561-023-01280-6)
- Pogge von Strandmann, P. A. et al., 2023. Assessing hydrological controls on the lithium isotope weathering tracer. Chemical Geology 642 121801. (10.1016/j.chemgeo.2023.121801)
- Bowyer, F. T. et al., 2023. Biological diversification linked to environmental stabilization following the Sturtian Snowball glaciation. Science Advances 9 (34) eadf9999. (10.1126/sciadv.adf9999)
- Krause, A. J. et al. 2023. Enhanced clay formation key in sustaining the middle eocene climatic optimum. Nature Geoscience 16 , pp.730-738. (10.1038/s41561-023-01234-y)
- Mills, B. J. et al., 2023. Evolution of atmospheric O2 through the Phanerozoic, revisited. Annual Review of Earth and Planetary Sciences 51 (1), pp.253-276. (10.1146/annurev-earth-032320-095425)
- Krause, A. J. et al. 2022. Extreme variability in atmospheric oxygen levels in the late Precambrian. Science Advances 8 (41) eabm8191. (10.1126/sciadv.abm8191)
- Shi, W. et al., 2022. Decoupled oxygenation of the Ediacaran ocean and atmosphere during the rise of early animals. Earth and Planetary Science Letters 591 117619. (10.1016/j.epsl.2022.117619)
- Pogge von Strandmann, P. A. et al., 2022. Lithium isotope behaviour during basalt weathering experiments amended with organic acids. Geochimica et Cosmochimica Acta 328 , pp.37-57. (10.1016/j.gca.2022.04.032)
- Alcott, L. J. et al., 2020. Development of iron speciation reference materials for Palaeoredox analysis. Geostandards and Geoanalytical Research 44 (3), pp.581-591. (10.1111/ggr.12342)
- Mills, B. J. et al., 2019. Modelling the long-term carbon cycle, atmospheric CO2, and Earth surface temperature from late Neoproterozoic to present day. Gondwana Research 67 , pp.172-186. (10.1016/j.gr.2018.12.001)
- Krause, A. J. et al. 2018. Stepwise oxygenation of the Paleozoic atmosphere. Nature Communications 9 (1) 4081. (10.1038/s41467-018-06383-y)
- Zhang, S. et al., 2018. Model based Paleozoic atmospheric oxygen estimates: a revisit to GEOCARBSULF. American Journal of Science 318 (5), pp.557–589. (10.2475/05.2018.05)
Ymchwil
Rwy'n fiogeocemegydd ac mae fy mhrif ddiddordeb yw ceisio deall cyd-esblygiad bywyd a'r Ddaear trwy amser daearegol.
Rwy'n adeiladu modelau rhifiadol o system y Ddaear, gan ymgorffori ystod eang o ddata daearegol, er mwyn archwilio'r newidiadau i'r amgylchedd arwyneb (cefnforoedd-atmosffer-crwst uchaf) dros amrywiaeth o amserlenni ac ymchwilio i ba brosesau allai fod wedi gyrru'r newidiadau hyn.
Yn benodol, mae llawer o'm gwaith yn canolbwyntio ar: dehongli'r crynodiadau ocsigen yn yr atmosffer a'r cefnforoedd yng ngorffennol y Ddaear; penderfynu pryd a pham roedd crynodiadau yn amrywio; a sut y gallem ddefnyddio'r wybodaeth hon ar gyfer y Ddaear bresennol a'r dyfodol, yn ogystal ag wrth chwilio am fywyd mewn mannau eraill yn y Bydysawd. Mae gen i ddiddordeb hefyd mewn defnyddio proxies geocemegol, gan gynnwys cymarebau isotop, i helpu i ail-greu paleohinsoddau a hindreuliad daearol yn y gorffennol, i ddeall sut mae'r Ddaear yn mynd i mewn ac allan o eithafion hinsawdd (bydoedd tŷ poeth a digwyddiadau Snowball Earth).
Addysgu
Ar hyn o bryd rwy'n dysgu ar y modiwlau canlynol yng Nghaerdydd:
- Deall y Blaned Fyw (blwyddyn 1af)
- Sgiliau Maes Daearyddiaeth (blwyddyn 1af)
- Biogeocemeg a Gwyddor Ecosystemau (2il flwyddyn)
- Gwaith Maes Daearyddol a Safbwyntiau (2il flwyddyn)
Rwyf hefyd yn goruchwylio nifer o fyfyrwyr traethawd hir israddedig.
Yn flaenorol, roeddwn hefyd yn dysgu ar y modiwl Amgylcheddau Eithafol (3ydd flwyddyn).
Bywgraffiad
Medi 2024 - Yn bresennol: Darlithydd mewn Cylchoedd Biogeocemegol Byd-eang, Prifysgol Caerdydd, UK
Ionawr 2024 - Awst 2024: Cymrawd Ymchwil mewn Modelu Biogeocemegol, Prifysgol Leeds, UK
Ionawr 2020 - Rhagfyr 2023: Cymrawd Ymchwil ym Modelu'r System Ddaear, UCL, DU
Hydref 2016 - Jul 2020: PhD mewn Gwyddorau Daear, Esblygiad planed y gellir byw ynddi: Astudiaeth modelu biogeocemegol o gynnydd ocsigen i lefelau modern, Prifysgol Leeds, UK
Medi 2014 - Awst 2016: MSc mewn Gwyddor yr Amgylchedd, Prifysgol East Anglia, UK
Medi 2013 - Jul 2014: Tystysgrif i Raddedigion mewn Daeareg, Birbeck, Coleg Prifysgol Llundain, UK
Hydref 2002 - Jul 2005: BSc mewn Ffiseg a Meteoroleg, Prifysgol Reading, UK
Aelodaethau proffesiynol
- Aelod o Gymdeithas Geocemeg Ewrop.
- Rwy'n aelod cyfetholedig o grŵp diddordeb arbennig Earth System Science Cymdeithas Ddaearegol Llundain.
- Aelod o gymdeithas Cynghori a Thiwtora'r DU.
Pwyllgorau ac adolygu
Rydw i ar bwyllgor trefnu cynhadledd flynyddol, Bywyd a Phlanws grŵp Gwyddorau'r System Ddaear.
Rwyf wedi darparu adolygiadau cymheiriaid ar gyfer y cyfnodolion canlynol:
- Geowyddoniaeth Natur
- Cyfathrebu Natur
- Ymchwil Gondwana
- Journal of the Geological Society of London
- Geochimica et Cosmochimica Acta
- Newid Byd-eang a Planedol
Meysydd goruchwyliaeth
Mae gen i ddiddordeb mewn goruchwylio unrhyw fyfyrwyr sydd â diddordeb yn esblygiad (bio)geocemegol y Ddaear dros amser, gan gynnwys cysylltiadau ag esblygiad a difodiant bywyd, a digwyddiadau newid hinsawdd amser dwfn.
Ar hyn o bryd rwy'n gyd-oruchwyliwr Jennifer Sides-Crump ym Mhrifysgol Leeds, y DU. Teitl y traethawd hir: Alternative Earths and their habitability for complex life.
Contact Details
Themâu ymchwil
Arbenigeddau
- Biogeocemeg
- Modelu System Ddaear
- Cyd-esblygiad y Ddaear a Bywyd
- Paleoclimates a Weathering
- Geocemeg isotopau