Paper in Press
GEOPHYSICAL RESEARCH LETTERS, doi:10.1029/2012GL054431
Predicting changes in temperate forest budburst using continental-scale observations and models
- First framework for understanding large-scale phenology using species level data
- Climate driven ecological variation within and between species
- Implications for dynamic global vegetation models improvement
A new framework for understanding the macro-scale variations in spring phenology is developed by using new data from the USA National Phenology Network. Changes in spring budburst for the U.S. are predicted by using Coupled Model Intercomparison Project phase 5 outputs. Macro-scale budburst simulations for the coming century indicate that projected warming leads to earlier budburst by up to 17 days. The latitudinal gradient of budburst becomes less pronounced due to spatially-varying sensitivity of budburst to climate change, even in the most conservative emissions scenarios. Currently existing inter-species differences in budburst date are predicted to become smaller, indicating the potential for secondary impacts at the ecosystem level. We expect that these climate-driven changes in phenology will have large effects on the carbon budget of U.S. forests and these controls should be included in dynamic global vegetation models.
Received 31 October 2012; accepted 03 December 2012.
Citation: (2012), Predicting changes in temperate forest budburst using continental-scale observations and models, Geophys. Res. Lett., doi:10.1029/2012GL054431, in press.