Tracy Twine

Associate Professor
[email protected]
612-625-7278
568 Borlaug Hall

1991 Upper Buford Circle
St Paul, MN 55108
United States

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Tracy's Google Scholar profile
Education
  • BS, Pennsylvania State University - 1994
  • MS, University of Wisconsin - Madison - 1998
  • PhD, University of Wisconsin - Madison - 2004

Areas of Interest

Atmosphere-Biosphere Interactions, Climate and Climate Change, Ecosystem Modeling, Urban Heat Islands

Teaching

  • ESPM 1425 The Atmosphere
  • ESPM 3131 Environmental Physics
  • ESPM 4093/LAAS 8195 Earth System Modeling
  • LAAS 5050 Integrated Topics in Land and Atmospheric Science
  • LAAS 5051 Thesis Proposal Writing for Land and Atmospheric Science

Research

I study how human land use and climate affect the structure and functioning of natural and managed ecosystems. I use numerical models to predict how forests, grasslands, croplands, and urban areas respond to changes in climate means as well as extreme weather (e.g., droughts and heavy rain events) and increases in greenhouse gas concentrations. I also use mounted sensors as well as a bicycle-mounted sensor system to characterize urban heat islands. 

Select Publications

  • Falconnier et al. 2020. Modelling climate change impacts on maize yields under low N input conditions in sub-Saharan Africa. Global Change Biology. Doi:10.1111/gcb.15261
  • Kimball et al. 2019. Simulation of maize evapotranspiration: An inter-comparison among 29 maize models, Agricultural and Forest Meteorology, https://doi.org/10.1016/j.agrformet.2019.02.037.
    Durand et al. 2018. How accurately do maize crop models simulate the interactions of atmospheric CO2 concentration levels with limited water supply on water use and yield? European Journal of Agronomy, doi:10.1016/j.eja.2017.01.002.
  • Mykleby, P.M., P.K. Snyder, and T. E. Twine. 2017. Quantifying the trade-off between carbon sequestration and albedo in midlatitude and high-latitude North American forests. Geophysical Research Letters, doi:10.1002/2016GL071459.
  • Sun, J., T. Twine, J. Hill, R. Noe, J. Shi, and M. Li. 2017. Effects of land use change for crops on water and carbon budgets in the Midwest USA. Sustainability, 9(2), doi:10.3390/su9020225.
  • Harding, K.J., T. E. Twine, A. VanLoocke, J. E. Bagley, and J. Hill. 2016. Impacts of second-generation biofuel feedstock production in the central U.S. on the hydrologic cycle and global warming mitigation potential. Geophysical Research Letters, 43, doi:10.1002/2016GL069981.
  • Mykleby, P.M., J. D. Lenters, G. T. Cutrell, K. S. Herrman, E. Istanbulluglu, D. T. Scott, T. E. Twine, C. J. Kucharik, T. Awada, M. E. Soylu, B. Dong. 2016. Energy and water balance response of a vegetated wetland to herbicide treatment of invasive Phragmites Australis, Journal of Hydrology, doi:10.1016/j.jhydrol.2016.05.015.
  • VanLoocke, A., T. E. Twine, C. J. Kucharik, C. J. Bernacchi. 2016. Assessing the potential to decrease the Gulf of Mexico hypoxic zone with Midwest US perennial cellulosic feedstock production. Global Change Biology-Bioenergy, doi:10.1111/gcbb.12385.
  • Xu, H., T.E. Twine, and E. Girvetz. 2016. Climate change and maize yield in Iowa. PLoSONE 11(5):e0156083. Doi: 10.1371/journal.pone.0156083.
  • Harding, K., T.E. Twine, and Y. Lu. Effects of dynamic crop growth on the simulated precipitation response to irrigation. 2015. Earth Interactions special issue on Biogeophysical Climate Impacts of Land Use and Land Cover Change, 19, paper no. 14. Doi: 10.1175/EI-D-150030.1.
  • Smoliak, B. V., P. K. Snyder, T. E. Twine, W. F. Hertel, P. M. Mykleby. 2015. Dense network sampling of the Twin Cities canopy layer urban heat island. Journal of Applied Meteorology and Climatology. doi: http://dx.doi.org/10.1175/JAMC-D-14-0239.1.
  • Ummenhofer, C., H. Xu, T. Twine, E. Girvetz, H. McCarthy, N. Chhetri, and K. Nicholas. 2015. How climate change affects extremes in maize and wheat yield in two cropping regions. Journal of Climate, 28, 4653-4687, doi:10.1175/JCLI-D-13-00326.1.
  • Vashisht, B. B., T. Nigon, D. J. Mulla, C. Rosen, H. Xu, T. Twine, and S. K. Jalota. 2015. Adaptation of water and nitrogen management to future climates for sustaining potato yield in Minnesota: Field and simulation study. Agricultural Water Management, 152, 198-206, doi:10.1016/j.agwat.2015.01.011.
  • VanLoocke, A., T. E. Twine, M. Zeri, C. J. Bernacchi. 2012. A regional comparison of water use efficiency for miscanthus, switchgrass and maize, Agricultural and Forest Meteorology, 164, 82-95, doi:10.1016/j.agformet.2012.05.016.
  • Anderson-Teixeira, K. J., P. K. Snyder, T. E. Twine, S. V. Cuadra, M. H. Costa, E. H. DeLucia. 2012. Climate regulation services of natural and agricultural ecoregions of the Americas, Nature Climate Change, doi:10.1038/nclimate1346.
  • Powers, J.S., M.D. Corre, T.E. Twine, E. Veldkamp, 2011. Geographic bias of field observations of soil carbon stocks with tropical land-use changes precludes spatial extrapolation. Proceedings of the National Academy of Sciences, doi:10.1073/pnas.1016774108.
  • VanLoocke, A., C. J. Bernacchi, and T. E. Twine, 2010. The impacts of Miscanthus x giganteus production on the Midwest U.S. hydrologic cycle, Global Change Biology Bioenergy, 2, 180-191. doi: 10.1111/j.1757-1707.2010.01053.x.
  • Twine, T. E. and C. J. Kucharik. 2009. Climate impacts on net primary productivity trends in natural and managed ecosystems of the central and eastern United States. Agricultural and Forest Meteorology, doi:10.1016/j.agrformet.2009.05.012.

Honors and Awards