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Dr Heather Johnstone

Postdoktorand_innen

Gruppe: 

Paläozeanographie

Telefon: 

+49 0421 218-65988

Fax:

+49 0421 218-9865981

E-Mail:

Raum: 

GEO 2130

Heather Johnstone

ORCID 0000-0003-0646-7966

CV

Qualifiications

2010  Dr. rer. nat., Paleoceanography, University of Bremen, Germany

2000  M.Sc. Geochemistry, University of Leeds, England

1997  B.Sc. Geology with Analytical Chemistry, University of Luton, England                               

 

Expeditions

2016 RV Meteor, Cape Town – Port Stanley, M133
2005 RV Meteor, Dakar - Dakar, M65

2003 RV Charles Darwin, Muscat, Oman – Victoria, Seychelles, CD145

 

Research interests

Foraminifera, Mg/Ca paleo-temperature proxy, lab automation, carbon cycle

Lab. automation

 

Scientific publications

Ballalai, JM, Santos, TP, Lessa, DO, Venancio, IM, Chiessi, CM, Johnstone, HJH, Kuhnert, H, Claudio, MR, Toledo, F, Costa, KB and Albuquerque, ALS (2019) Tracking spread of the Agulhas Leakage into the western South Atlantic and its northward transmission during the Last Interglacial. Paleoceanography and Paleoclimatology. doi:10.1029/2019PA003653

Johnstone, HJH, Lee, W and Schulz, M (2016) Effect of preservation state of planktonic foraminifera tests on the decrease in Mg/Ca due to reductive cleaning and on sample loss during cleaning. Chemical Geology, 420. 23-36. doi:10.1016/j.chemgeo.2015.10.045 PANGAEA Supplementary Data

Johnstone, HJH, Steinke, S, Kuhnert, H, Bickert, T, Pälike, H and Mohtadi, M (2016) Automated cleaning of foraminifera shells before Mg/Ca analysis using a pipette robot. Geochemistry, Geophysics, Geosystems, 17(8). 3502-3511. doi:10.1002/2016GC006422

Johnstone, HJH, Kiefer, T, Elderfield, H and Schulz, M (2014) Calcite saturation, foraminiferal test mass, and Mg/Ca-based temperatures dissolution corrected using XDX-A 150 ka record from the western Indian Ocean. Geochemistry, Geophysics, Geosystems, 15(3). 781-797. doi:10.1002/2013GC004994 PANGAEA Supplementary Data

Johnstone, HJH, Yu, J, Elderfield, H and Schulz, M (2011) Improving temperature estimates derived from Mg/Ca of planktonic foraminifera using X-ray computed tomography-based dissolution index, XDX. Paleoceanography, 26. PA1215. doi:10.1029/2009PA001902 PANGAEA Supplementary Data

Zarriess, M, Johnstone, HJH, Prange, M, Steph, S, Groeneveld, J, Mulitza, S and Mackensen, A (2011) Bipolar seesaw in the northeastern tropical Atlantic during Heinrich stadials. Geophysical Research Letters, 38. L04706. doi:10.1029/2010GL046070 PANGAEA Supplementary Data

Johnstone, HJH (2010) Assessing dissolution in the tests of planktonic foraminifera using computed tomography (CT): potential for improving paleoceanographic reconstructions. PhD thesis, Elektronische Dissertationen an der Staats- und Universitätsbibliothek Bremen, Germany. urn:nbn:de:gbv:46-00101815-15

Johnstone, HJH, Schulz, M, Barker, S and Elderfield, H (2010) Inside story: An X-ray computed tomography method for assessing dissolution in the tests of planktonic foraminifera. Marine Micropaleontology, 77(1-2). 58-70. doi:10.1016/j.marmicro.2010.07.004 PANGAEA Supplementary Data

Steinke, S, Groeneveld, J, Johnstone, HJH and Rendle-Bühring, R (2010) East Asian summer monsoon weakening after 7.5 Ma: Evidence from combined planktonic foraminifera Mg/Ca and delta 0-18 (ODP Site 1146; northern South China Sea). Palaeogeography, Palaeoclimatology, Palaeoecology, 289(1-4). 33-43. doi:10.1016/j.palaeo.2010.02.007 PANGAEA Supplementary Data

 

M.J. Dalby, S.Childs, M.O. Riehle, H.J.H. Johnstone, S. Affrossman and A.S.G.Curtis (2003):  Fibroblast Reaction to Island Topography: Changes in Cytoskeleton and Morphology with Time. Biomaterials 24; 927-935 http://www.elsevier.com/locate/biomaterials

M.J.Dalby, G.E.Marshall, H.J.H. Johnstone, S.Afrossman, M.O.Riehle (2003):  Interactions of Human Blood and Tissue Cell Types with 95nm Polymer Demixed Islands: Tissue Engineering Potentials. IEEE Transactions in Nanobioscience 1; 18-231 http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?puNumber=7728

M.J.Dalby, S.J.Yarwood, M.O.Riehle, H.J.H. Johnstone, S.Afrossman, M.O.Riehle (2003):  Fibroblast Signalling Events in Response to Nano-Topography. A Gene Array Study. IEEE Transactions in Nanobioscience 1; 12-17 http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?puNumber=7728

O. Riehle, M. J. Dalby, H.J.H. Johnstone, A. MacIntosh, S. Affrossman (2003): Cell Behaviour of Rat Calvaria Bone Cells on Surfaces with Random Nanometric Features. Materials Science & Engineering C. 23 337-340 Sp. Iss. SI MAR 3 2003 http://www.sciencedirect.com/science/journal/00255416

M.J. Dalby, M.O. Riehle, H.J.H. Johnstone, S. Affrossman and A.S.G. Curtis (2003):  Non-adhesive nanotopography: fibroblast response to poly(n-butylmethacrylate) - poly(styrene) demixed surface features.  Journal of Biomedical Materials Research. 67A 1025-32 http://www3.interscience.wiley.com/cgi-bin/jhome/30728

M.J. Dalby, M.O. Riehle, H.J.H. Johnstone, S. Affrossman, A.S.G. Curtis. Investigating the limits of filopodial sensing: a brief report using SEM to image the interaction between 10 nm high nano-topography and fibroblast filopodia. Cell Biology International.

Buttiglieri, D. Pasqui, M. Migliori, H. Johnstone, S. Affrossmann, L. Sereni, R. Barbucci, C. Tetta, G. Camussi (2003): Endothelization and adherence of leucocytes to nanostructured surfaces. Biomaterials, 24, 2731-2738 http://www.elsevier.com/locate/biomaterials

M.J. Dalby, S. J. Yarwood, M.O. Riehle, H.J.H. Johnstone, S. Affrossman and A.S.G. Curtis (2002): Increasing Fibroblast Response to Materials Using Nano-Topography: Morphological and Genetic Measurements of Cell Response to 13nm High Polymer Demixed Islands. Experimental Cell Research 276, 1-9
http://www.sciencedirect.com/science/journal/00144827

M.J.Dalby, M.O.Riehle, H.J.H. Johnstone, S.Affrossman and A.S.G. Curtis (2002):  Polymer Demixed Nano-Topography: Control of Fibroblast Spreading and Proliferation. Tissue Engineering 8; 1099-1108 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12542955&dopt=Abstract

M Riehle, M Dalby, H.J.H. Johnstone, J Gallagher, M A Wood, B Casey, K McGhee, S Affrossman, C D W Wilkinson and A.S.G. Curtis (2002):  Nanometric Surface Patterns for Tissue Engineering: Fabrication and Biocompatibility In vitro. Mat. Res. Soc. Symp. Proc. Vol. 705
http://www.mrs.org/publications/epubs/proceedings/fall2001/y/

M.J. Dalby, M.O. Riehle, H.J.H. Johnstone, S. Affrossman, A.S.G. Curtis (2002):  In vitro reaction of endothelial cells to polymer demixed nano-topography.  Biomaterials 23 2945-2954. http://www.elsevier.com/locate/biomaterials