Julia Pongratz

Post-doctoral Research Scientist

Department of Global Ecology

Carnegie Institution

260 Panama Street

Stanford, CA 94305, USA

Curriculum Vitae

E-mail: pongratzATstanfordDOTedu

Phone: +1-650-462-1047 x 247

Fax: +1-650-462-5968

Research interests

General interests

- Earth system modeling

- Biosphere-atmosphere interactions

- Carbon cycle

- Climate change

- Remote sensing of land cover

Current research

The vegetation covering the continents has decisive influence on climate, and humans are interfering substantially by agricultural expansion and deforestation. For example, about one third of past anthropogenic CO₂ emissions has been caused by land cover change. In my research I focus on the effects of land cover change on global and regional carbon fluxes, but also on the effects on climate of changes in the physical properties of the land surface. The timescales considered cover the last millennium to the near future, addressing questions on the beginning of human-induced climate change as well as possible future mitigation strategies by reforestation. The main tools for my research are comprehensive Earth system models.

Publications

Articles

J. Pongratz, C.H. Reick, T. Raddatz, M. Claussen, and K. Caldeira: Preferences of farmers increased mitigation potential of reforestation, in review.

J. Pongratz, K. Caldeira, C.H. Reick, and M. Claussen, 2011: Coupled climate-carbon simulations indicate minor global effects of wars and epidemics on atmospheric CO₂ between AD 800 and 1850, The Holocene, doi: 10.1177/0959683610386981.

Press coverage: Interview on BBC World Service.

G.A. Schmidt, J.H. Jungclaus, C.M. Ammann, E. Bard, P. Braconnot, T.J. Crowley, G. Delaygue, F. Joos, N.A. Krivova, R. Muscheler, B.L. Otto-Bliesner, J. Pongratz, D.T. Shindell, S.K. Solanki, F. Steinhilber, and L.E.A. Vieira, 2010: Climate forcing reconstructions for use in PMIP simulations of the last millennium (v1.0), Geosci. Model Dev., 4, pp. 33–45, doi: 10.1177/0959683610386981.

J. Pongratz, 2010: Global warming or cooling from historical land-cover change? iLEAPS Newsletter 10.

J. Pongratz, C.H. Reick, T. Raddatz, and M. Claussen, 2010: Biogeophysical versus biogeochemical climate response to historical anthropogenic land cover change, Geophys. Res. Lett. 37, L08702, doi:10.1029/2010GL043010.

K. Hibbard, A. Janetos, D. van Vuuren, J. Pongratz, S. Rose, R. Betts, M. Herold, and J. Feddema, 2010: Research priorities in land use and land-cover change for the Earth System and Integrated Assessment Modelling, International Journal of Climatology, doi:10.1002/joc.2150.

J.H. Jungclaus, S.J. Lorenz, C. Timmreck, C.H. Reick, V. Brovkin, K. Six, J. Segschneider, M.A. Giorgetta, T.J. Crowley, J. Pongratz, N.A. Krivova, L.E. Vieira, S.K. Solanki, D. Klocke, M. Botzet, M. Esch, V. Gayler, H. Haak, T.J. Raddatz, E. Roeckner, R. Schnur, H. Widmann, M. Claussen, B. Stevens, and J. Marotzke, 2010: Climate and carbon-cycle variability over the last millennium, Clim. Past Discuss., 6, pp. 1009–1044, doi:10.5194/cpd-6-1009-2010.

C. Reick, T. Raddatz, J. Pongratz, and M. Claussen, 2009: Contribution of anthropogenic land cover change emissions to pre-industrial atmospheric CO₂, Tellus, doi:10.1111/j.1600-0889.2010.00479.x.

E. Röckner, M. Giorgetta, T. Crüger, M. Esch, and J. Pongratz, 2009: Historical and future anthropogenic emission pathways derived from coupled climate-carbon cycle simulations, Climatic Change, doi:10.1007/s10584-010-9886-6.

J. Pongratz, C.H. Reick, T. Raddatz, and M. Claussen, 2009: Effects of anthropogenic land cover change on the carbon cycle of the last millennium, Global Biogeochem. Cycles 23, GB4001, doi:10.1029/2009GB003488.

Press coverage: Nature.

J. Pongratz, T. Raddatz, C.H. Reick, M. Esch, and M. Claussen, 2009: Radiative forcing from anthropogenic land cover change since A.D. 800, Geophys. Res. Lett. 36, L02709, doi:10.1029/2008GL036394.

J. Pongratz and C.H. Reick. 2009: Vorindustrielle Landwirtschaft: Klimawandel ohne Öl und Kohle, Jahrbuch der Max-Planck-Gesellschaft 2009.

J. Pongratz and C.H. Reick, 2009: Landwirtschaft pflügt das Klima um, MaxPlanckForschung 4.2009.

J. Pongratz, 2009: A model estimate on the effect of anthropogenic land cover change on the climate of the last millennium, Ph.D. Thesis, Reports on Earth System Science 68, ISSN 1614-1199.

J. Pongratz, C. Reick, T. Raddatz, and M. Claussen, 2008: A reconstruction of global agricultural areas and land cover for the last millennium, Global Biogeochem. Cycles 22, GB3018, doi:10.1029/2007GB003153.

J. Pongratz, C. Reick, T. Raddatz, and M. Claussen, 2008: A Global Land Cover Reconstruction AD 800 to 1992 – Technical Description. Reports on Earth System Science 51, ISSN 1614-1199.

J. Pongratz, L. Bounoua, R. DeFries, D.C. Morton, L.O. Anderson, W. Mauser, and C. Klink, 2006: The impact of land cover change on surface energy and water balance in Mato Grosso, Brazil, Earth Interactions 10 (19).

First-authored conference papers

J. Pongratz, and K. Caldeira, 2010: Relevance of preindustrial land cover change and emissions for attribution of excess atmospheric carbon dioxide. AGU Fall Meeting, Abstract A24A-07.

J. Pongratz, C. Reick, T. Raddatz, M. Claussen, and K. Caldeira, 2010: Biophysical versus carbon cycle effects of anthropogenic land cover change, Global Land Project Open Science Meeting.

J. Pongratz, C. Reick, K. Caldeira, T. Raddatz, and M. Claussen, 2010: Biophysical versus carbon cycle effects of anthropogenic land cover change, AIMES Open Science Conference.

J. Pongratz, C. Reick, T. Raddatz, K. Caldeira, and M. Claussen, 2009: Regional contributions to global climate change in present and future from anthropogenic land cover change, Eos 90(52), Fall Meet. Suppl., Abstract B21B-0345.

J. Pongratz, C.H. Reick, T. Raddatz, and M. Claussen, 2009: Anthropogenic land cover change and the carbon cycle - a GCM study on the beginning of the Anthropocene, 8^th International Carbon Dioxide Conference.

J. Pongratz, C.H. Reick, T. Raddatz, and M. Claussen, 2009: Preindustrial agriculture and the carbon cycle - a GCM study on the beginning of the Anthropocene, Geophysical Research Abstracts 11, EGU2009-5697.

J. Pongratz, T. Raddatz, C.H. Reick, and M. Claussen, 2008: Effects of pre-industrial agricultural expansion and epidemics on the climate and the carbon cycle, Eos Trans. AGU 89(53), Fall Meet. Suppl., Abstract U31A-0007.

J. Pongratz, C. Reick, T. Raddatz, and M. Claussen, 2008: Biogeophysical effects of anthropogenic land cover change during the last millennium, Geophysical Research Abstracts 10, EGU2008-A-03996.

J. Pongratz, C. Reick, T. Raddatz, and M. Claussen, 2007: A millennium of anthropogenic land cover change and its effects on climate. Eos Trans. AGU 88(52), Fall Meet. Suppl., Abstract GC54C-01.

J. Pongratz, C. Reick, T. Raddatz, and M. Claussen, 2007: Anthropogenic land cover change in the last millennium – assessing its extent and consequences for climate, Geophysical Research Abstracts 9, 01878.

J. Pongratz, R. DeFries, L. Bounoua, D.C. Morton, L.O. Anderson, and Y.E. Shimabukuro, 2004: Estimating climatic implications of soy and pasture expansion in Mato Grosso, III Conferência Científìca do LBA, Brasília, Brazil.