Articles | Volume 16, issue 5
Clim. Past, 16, 1901–1916, 2020
https://doi.org/10.5194/cp-16-1901-2020
Clim. Past, 16, 1901–1916, 2020
https://doi.org/10.5194/cp-16-1901-2020

Research article 19 Oct 2020

Research article | 19 Oct 2020

Sampling density and date along with species selection influence spatial representation of tree-ring reconstructions

Justin T. Maxwell et al.

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Cited articles

Alexander, M. R., Pearl, J. K., Bishop, D. A., Cook, E. R., Anchukaitis, K. J., and Pederson, N.: The potential to strengthen temperature reconstructions in ecoregions with limited tree line using a multispecies approach, Quaternary Res., 92, 583–597, https://doi.org/10.1017/qua.2019.33, 2019. 
Anchukaitis, K. J., Wilson, R., Briffa, K. R., Büntgen, U., Cook, E. R., D'Arrigo, R., Davi, N., Esper, J., Frank, D., Gunnarson, B. E., Hegerl, G., Helama, S., Klesse, S., Krusic, P. J., Linderholm, H. W., Myglan, V., Osborn, T. J., Zhang, P., Rydval, M., Schneider, L., Schurer, A., Wiles, G., and Zorita, E.: Last millennium Northern Hemisphere summer temperatures from tree rings: Part II, spatially resolved reconstructions, Quaternary Sci. Rev., 163, 1–22, https://doi.org/10.1016/j.quascirev.2017.02.020, 2017. 
Au, T. F., Maxwell, J. T., Novick, K. A., Robeson, S. M., Warner, S. M., Lockwood, B. R., Phillips, R. P., Harley, G. L., Telewski, F. W., Therrell, M. D., and Pederson, N.: Demographic shifts in eastern US forests increase the impact of late-season drought on forest growth, Ecography, 43, 1475–1486, https://doi.org/10.1111/ecog.05055, 2020. 
Bussberg, N. W., Maxwell, J. T., Robeson, S. M., and Huang, C.: The effect of end-point adjustments on smoothing splines used for tree-ring standardization, Dendrochronologia, 60, 125665, https://doi.org/10.1016/j.dendro.2020.125665, 2020. 
Casson, N. J., Contosta, A. R., Burakowski, E. A., Campbell, J. L., Crandall, M. S., Creed, I. F., Eimers, M. C., Garlick, S., Lutz, D. A., Morison, M. Q., Morzillo, A. T., and Nelson, S. J.: Winter Weather Whiplash: Impacts of Meteorological Events Misaligned With Natural and Human Systems in Seasonally Snow-Covered Regions, Earth's Future, 7, 1434–1450, https://doi.org/10.1029/2019EF001224, 2019. 
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We found that increasing the density of chronologies in the tree-ring network resulted in estimated soil moisture conditions that better matched the spatial variability of the values that were instrumentally recorded for droughts and, to a lesser extent, pluvials. By sampling trees in 2010 compared to 1980, the sensitivity of tree rings to soil moisture decreased in the southern portion of our region, where severe drought conditions have been absent over recent decades.