skip to primary navigation skip to content

Paul J. Krusic

Paul J. Krusic

Senior Research Associate, working with Prof Ulf Büntgen.


Trained as a forester, practiced in the field of Dendrochronology I am thrilled by finding new data and stories from the earth's varied natural archives.


  • 2009-2010: Programmer/Analyst; Stockholm University, Stockholm, Sweden
  • 1991-2008: Research Assistant; LDEO, Columbia University, NY, USA
  • 1993-1996: Programmer/Analyst; Glacier Research Group, University of New Hampshire, Durham, NH, USA
  • 1984-1991: Supervisory Forester; USDA Forest Service, NEFES, Durham, NH, USA
  • 1978-1980: Forester; Bureau of Indian Affairs, Warm Springs, OR, USA


  • 2011-Present: Stockholm University, PhD. Dept. of Physical Geography
  • University of New Hampshire, Dept. of Forest Resources, BSF 1981

Awards and scholarships

  • 2008: Richard L. Holmes Outstanding Service to Dendrochronology; Tree Ring Society
  • 1993: US State Department, Office of Oceans and International Scientific Affairs. in support of Russian science educators exchange.
  • 1993: USDA FS Global Climate Change Program Research Grant; for continued support of the North American Dendroecological Fieldweek
  • 1992: USDA FS Global Climate Change Program Research Grant; for continued support of the North American Dendroecological Fieldweek
  • 1991: USDA FS Global Climate Change Program Research Grant; for continued support of the North American Dendroecological Fieldweek
  • 1990: USDA Forest Service Spruce-Fir Cooperative Research Grant; in support of the first North American Dendroecological Fieldweek
  • 1990: USDA, Certificate of Merit; Sustained Superior Performance.
  • 1989: USDA, Certificate of Merit; Superior Performance
  • 1988: USDA; Certificate of Merit; In recognition of significant contributions to the research efforts of the National Vegetation Survey/Forest Response Program: Research on tree growth in New England and New York.
  • 1986: Northeast Computer Institute Software Grant; To Develop microcomputer graphics software to facilitate the analysis and cross-dating of tree-ring measurements.


My personal research activities include reconstructions of past environmental history, with emphasis on climate, and developing analytical tools to facilitate that exploration.



  • Büntgen,, (includes Krusic, P.J.) (2017). Reply to "Limited late antique cooling". Nature Geoscience, v. 10, p.243-. doi:10.1038/ngeo2927
  • Klippel, L., Krusic, P.J., Brandes, R., Hartl-Meier, C., Trouet, V., Meko, M., and J. Esper, (2017). High elevation inter-site differences in Mt. Smolikas tree-ring width data. Dendrochronologia. doi:10.1016/j.dendro.2017.05.006
  • Büntgen, U., and Krusic, P.J., (2017). Ideas and perspectives: New research examples of autumnal climate change ecology. Biogeosciences. doi:10.5194/bg-2017-265
  • Büntgen, U., Eggertsson, Ó., Wacker, L., Sigl, M., Charpentier Ljungqvist, F., Di Cosmo, N., Plunkett, G., Krusic, P. J., Esper, J., Lane, C., Reinig, F., and C. Oppenheimer, (2017). Multi-proxy dating of Island's major pre-settlement Katla eruption to 822-823 CE, Geolog.
  • Rao, M. P., Cook, B.I., Cook, E.R., D'Arrigo, R.D., Krusic, P. J., Anchukaitis, K., LeGrande, A., Buckley, B. M., Davi, N. K., Leland, C., and Griffin, K. L., (2017). European and Mediterranean hydroclimate responses to tropical volcanic forcing over the past millennium, GRL. doi:10.1002/2017GL073057
  • Büntgen,, (includes Krusic, P.J.) (2017). New tree-ring evidence from the Pyrenees reveals Western Mediterranean climate variability since medieval times. JCLI. doi:10.1175/JCLI-D-16-0526.1
  • Anchukaitis, K.J,, (includes Krusic, P.J.) (2017). Last millennium northern hemisphere summer temperatures from tree rings: Part II, spatially resolved Reconstructions. QSR, v. 163, p.1-22. doi:10.1016/j.quascirev.2017.02.020
  • Seiler, R., Tognetti, R., Krusic, P.J., Kirchner, J.W., Houlié, N., Andronico, D., Cullotta, S., D'Arrigo, R., Cherubini, P., (2017) Insensitivity of tree-ring growth to temperature and precipitation sharpens the puzzle of enhanced pre-eruption NDVI on Mt. Etna (Italy). Plos One, doi:10.1371/journal.pone.0169297
  • Konter, O., Krusic, P.J., Trouet, V., Esper, J. (2017) Meet Adonis; Europe's oldest dendrochronologically dated tree. Dendrochronologia, doi:10.1016/j.dendro.2016.12.001
  • Esper J, Büntgen U, Denzer S, Krusic, P.J., Luterbacher J, Schäfer R, Schreg R, Werner J (2016) Environmental drivers of historical grain price variations in Europe. Climate Research, v.72, No.1, p.39-52.


  • Esper, J., Krusic, P.J., Ljungqvist,F.C., Luterbacher, J., Carrer, M., Cook,E., Davi, N., Hartl-Meier,C., Kirdyanov, A., Konter, O., Myglan ,V., Timonen, M., Treydte, K., Trouet, V., Villalba, R., Yang, B.,and Büntgen, U, (2016). Review of tree-ring temperature reconstructions of the past millennium. QSR, v. 145, p.134-151. doi:10.1016/j.quascirev.2016.05.009
  • Leland, C. Hom, J, Skowronski, N., Ledig, F.T., Krusic, P.J., Cook, E., Martin-Benito, D., Martin-Fernandez, J., and Pederson, N., (2016). Missing rings and common variability in a New Jersey, Pitch pine (Pinus rigida) provenance plantation, Plos One, doi:10.1371/journal.pone.0154730
  • Ljungqvist, F.C., Krusic, P.J., Sundqvist, H., Zorita, E., Brattstrom, G., Frank, D., (2016). Northern Hemisphere hydroclimatic variability over the past 12 centuries. Nature, 532, 94-98: doi:10.1038/nature17418
  • Büntgen U.,, (includes: Krusic, P.J.), (2016). Cooling and societal change during the Late Antique Little Ice Age from 536 to around 660 CE. Nature Geoscience, v. 9, p.231-236. doi:10.1038/ngeo2652
  • Wilson, R., etal.,(includes: Krusic, P.J.), (2016) Last millennium northern hemisphere summer temperatures from tree rings: Part I: The long term context. QSR, v. 134, p.1-18. doi:10.1016/j.quascirev.2015.12.005


  • Cook.E.R.,,(includes: Krusic, P.J.), (2015) Old World Megadroughts and pluvials during the Common Era. Vol.1, no.10, Science Advances
  • Schollaen, K., Karamperidou, C., Krusic, P.J, Cook, E., and Helle, G. (2015). ENSO flavors in tree-ring δ18O records of Tectona grandis from Indonesia, Clim. Past, v.11, p.325-1333, doi:10.5194/cp-11-1325-2015
  • Krusic, PJ., E. R.Cook, D. Dukpa, S. Rupper, A. Putnam, J. Schaefer (2015), 635 years of summer temperature variability over the Bhutanese Himalaya. GRL. 42, 2988-2994.
  • Esper J, Konter O, Krusic, P.J., Saurer M, Holzkämper S, Büntgen U. (2015). Long-term summer temperature variations in the Pyrenees from detrended stable carbon isotopes. Geochronometria, v. 42, p.53-59. doi:10.1515/geochr-2015-0006
  • Büntgen U, Trnka, M., Krusic, P.J, Kyncl T, Kyncl J, Nicolussi K, Luterbacher J, Zorita E, Charpentier Ljungqvist F, Auer I, Konter O, Schneider L, Tegel W, Stepanek P, Brönnimann S, Hellmann L, Nievergelt D, Esper J (2015) Tree-ring amplification of the early-19th century summer cooling in Central Europe. Journal of Climate, v. 28, p.5272-5288. doi:10.1175/JCLI-D-14-00673.1
  • Buntgen, U., W. Tegel, M. Carrer., P.J. Krusic, M. Hayes. J. Esper (2015). Limited tree-ring evidence for a 1540 European "Megadrought". Climatic Change, v. 131, p.183-190. doi:10.1007/s10584-015-1423-1


  • Chawchai, S., A Chabangborn, S. Fritz, M. Väliranta, C. Mörth, M. Blaauw, P.J.Reimer, P J. Krusic, L. Löwemark, B. Wohlfarth (2014). Hydroclimatic shifts in northeast Thailand during the last two millennia - the record of Lake Pa Kho JQS, v.111, p.62-71. doi:10.1016/j.quascirev.2015.01.007
  • Siem, A., K. Treydte, V. Trouet, D. Frank, P. Fonti, W. Tegel. M. Panayotov, L. Fernandez-Donado, P.J. Krusic, and U. Buntgen. (2014). Climate sensitivity of Mediterranean pine growth reveals distinct east-west dipole. Int. Journal of Climatology, v.35,p.2503-2513, doi:10.1002/joc.4137
  • Buntgen, U., L. Waker, K. Nicolussi, D. Guttler, W. Tegel. P.J. Krusic and J. Esper. (2014). Extraterrestrial confirmation of tree-ring dating. Nature Climate Change, v. 4, p.404-405. doi:10.1038/nclimate2240
  • Esper, J., E. Duthorn, P.J. Krusic, M. Timonen, and U. Buntgen. (2014). Northern European summer temperature variations over the Common Era from integrated tree-ring density records. JQS, v. 29, p.487-494. doi:10.1002/jqs.2726
  • Martin-Benito, D., N. Pederson, M. McDonald, B. Buckley, P.J. Krusic, K. Anchukaitis, R. D'Arrigo, L. Andreu-Hayles, and E. Cook, (2014). Dendrochronological dating of the World Trade Center ship, Lower Manhattan, New York City. Tree-Ring Research, v.70(2), p.65-77, doi:10.3959/1536-1098-70.2.65


  • Schollaen, K.I., Heinrich, B. Neuwirth, P.J. Krusic, R. D;Arrugo, O. Karyanto, G. Helle. Multiple tree-ring chronologies (ring width, δ13C and δ18O) reveal dry and rainy season signals of rainfall in Indonesia. (2013). OSR, v.73, p.170-181
  • Esper, J., L. Schneider, P. J. Krusic, J. Luterbacher, U. Büntgen, M. Timonen, F. Sirocko, E. Zorita.(2013). European summer temperature response to annually dated volcanic eruptions over the past nine centuries. Bull Volcanol, v. 75, p.1-14. doi:10.1007/s00445-013-0736-z
  • Esper,J , U. Büntgen , J. Luterbacher , P. J. Krusic, (2013) Testing the hypothesis of globally missing rings in temperature sensitive dendrochronological data. Dendrochronologia, v. 31, p.216-222. doi:10.1016/j.dendro.2012.11.002
  • PAGES 2k Consortium, (includes: Krusic, P.J.), (2013). Continental-scale temperature variability during the last two millennia. Nature Geoscience, v.6, p.339-346, doi:10.1038/ngeo1797.


  • Anchukaitis, K.J.,, (includes: Krusic, P.J.), (2012). Tree rings and volcanic cooling, Nature Geoscience, v. 5, p.836-837. doi:10.1038/ngeo1645
  • Cook, E.R., P.J. Krusic, K.J. Anchukaitis, B.M. Buckley, T. Nakatsuka, M. Sano and the PAGES Asia 2k members, (2012). Tree-ring reconstructed summer temperature anomalies for temperate East Asia since 800 C.E., Climate Dynamics, v.41(11), p.2957-2972, doi:10.1007/s00382-012-1611-x
  • Björklund J.A, Gunnarson B.E, Krusic P.J, Grudd H., Josefsson T., Östlund L. and Linderholm H.W., (2012). Advances towards improved low-frequency tree-ring reconstructions, using an updated Pinus sylvestris L. MXD network from the Scandinavian Mountains. Theoretical and Applied Climatology, v.113(3), p.697-710. doi:10.1007/s00704-012-0787-7
  • Ljungqvist ,F. C., P.J. Krusic G. Brattstrom, and H. S. Sundqvist. (2012). Northern Hemisphere temperature patterns in the last 12 centuries. Clim. Past. v.8, p.227-249, doi:10.5194/cp-8-227-2012


  • D'Arrigo,R.D., Jonathan Palmer, Caroline C. Ummenhofer, Nyi Nyi Kyaw4 and Paul J. Krusic.(2011).Three centuries of Myanmar monsoon climate variability inferred from teak tree rings. GRL. v.38(24), doi:10.1029/2011GL049927
  • Esper J, P. J. Krusic, K. Peters, D. Frank. (2009). Exploration of long-term growth changes using the tree-ring detrending program Spotty. Dendrochronologia 27, 75-82
  • Cook, E.R., P.J. Krusic. (2008). Experimental reconstruction of large-scale summer monsoon drought over India and the Tibetan Plateau using tree rings from 'High Asia. The Palaeobotanist
  • D'Arrigo, R., R. Wilson, J. Palmer, P. J. Krusic, A. Curtis, J. Sakulich, S. Bijaksana, S. Zulaikah, O. Ngkoimani and S. Tudhope. (2006). Reconstructed Indonesian warm pool SSTs from tree rings and corals: linkages with ENSO and the Asian monsoon. Paleoceanography. v.21(3), doi:10.1029/2005PA001256
  • D'Arrigo, R., R. Wilson, J. Palmer, P. J. Krusic, A. Curtis, J. Sakulich S. Bijaksana, S. Zulaikah and O. Ngkoimani. (2006). Monsoon drought over Java, Indonesia during the past two centuries. GRL. v.33, doi:10.1029/2005GL024565
  • Cook, E.R., P. J. Krusic, and P.D. Jones. (2003). Dendroclimatic signals in long tree-ring chronologies from the Himalayas of Nepal. International Journal of Climatology. V.23, p.707-732, doi:10.1002/joc.911
  • Esper J., E.R.Cook, P. J. Krusic, K. Peters, F.H. Schweingruber. (2003). Tests of the RCS method for preserving low-frequency variability in long tree-ring chronologies. Tree-Ring Research. v.59(2), p.81-98
  • Stahle, D. W., R. D. D'Arrigo, P.J. Krusic, M. K. Cleaveland, E. R. Cook, R. J. Allan, J. E. Cole, R. B. Dunbar, M. D. Therrell, D. A. Gay, M. D. Moore, M. A. Stokes, B. T. Burns and L. G. Thompson. (1998). Experimental dendroclimatic reconstruction of the Southern Oscillation. Bull. Amer. Met. v.79(10), p.2137-2152.
  • D'Arrigo, R. D., E. R. Cook, J. Salinger, J. Palmer, B. M. Buckley, P. J. Krusic and R. Villalba. (1998). Temperature-sensitive tree-ring records from New Zealand: long-term context for recent warming trend. Climate Dynamics. V.14(3), p.191-199, doi:10.1007/s003820050217
  • Cook, E.R., W. Nance, P, Krusic, G. Grissom. 1997. Modelling the Differential Sensitivity of Loblolly Pine to Climate Change Using Tree Rings. In. The Productivity and Sustainability of Southern Forest Ecosystems in a Changing Environment (R. Mickler and S.Fox eds.), Ecological Studies, Vol.128, p.717-739, Springer, NY
  • D'Arrigo, R., Barbetti, M., Watanasak, M., Buckley, B., Krusic, P., Boonchirdchoo, S., Sarutanon, S., (1997). Progress in dendroclimatic studies of Mountain pine in Northern Thailand. IAWA J. 18 (4), 433-444.
  • D'Arrigo, R.D., G.C.Jacoby and P.J. Krusic. (1994). Progress in Dendroclimatic Studies in Indonesia. Terrestrial, Atmospheric and Oceanographic Sciences. V.5, p.349-363.
  • Krusic, P.J., (1993). Final Report, Fourth Annual Dendroecological Fieldweek. Submitted to the USDA FS Global Climate Change Program.
  • Brown, P., P.J. Krusic, (1992). Final Report, Third Annual Dendroecological Fieldweek. Submitted to the USDA FS Global Climate Change Program.
  • Krusic, P.J., (1991). Final Report, Second Annual Dendroecological Fieldweek. Submitted to the USDA FS Global Climate Change Program.
  • Krusic, P.J., M. Kenney, J. Hornbeck, (1991). Preserving decayed wood samples for tree-ring measurement. Tree-Ring Bulletin
  • Krusic, P.J., (1990). Final Report, First Annual Dendroecological Fieldweek. Submitted to the USDA FS Spruce-Fir Cooperative Program.
  • Smith, R.B., J. Hornbeck, C.A. Federer, P.J. Krusic, (1990). Regionally averaged diameter growth in New England forests, Northeastern Exp. Station Research Rep. no. NE-637. USDA Forest Service, Radnor, PA
  • Krusic, P.J., J. Hornbeck, M. Kenney, (1988). Preparation of increment cores for tree-ring measurement. N. Journal of Applied Forestry, 4:104-105


For the past 30 years, I have organised and participated in numerous field-schools and summer school programs dedicated to the acquisition and analysis or natural environmental archives. These include the creation of the North American DendroEcological Fieldweek, in 1990 as well as the first three Bolin Centre, Climate Research, Summer Schools. I have hosted many students from around the world keen to learn the fundamentals of tree-ring research, most recently from India and Bhutan.