Search

Your search keyword '"Trachsel, Mathias"' showing total 18 results
Start Over Author "Trachsel, Mathias" Publication Year Range Last 10 years
18 results on '"Trachsel, Mathias"'

3. Forest responses to last‐millennium hydroclimate variability are governed by spatial variations in ecosystem sensitivity

Author

Rollinson, Christine R., Dawson, Andria, Raiho, Ann M., Williams, John W., Dietze, Michael C., Hickler, Thomas, Jackson, Stephen T., McLachlan, Jason, Moore, David J. P., Poulter, Benjamin, Quaife, Tristan, Steinkamp, Jörg, Trachsel, Mathias, and Morin, Xavier

Abstract

Forecasts of future forest change are governed by ecosystem sensitivity to climate change, but ecosystem model projections are under‐constrained by data at multidecadal and longer timescales. Here, we quantify ecosystem sensitivity to centennial‐scale hydroclimate variability, by comparing dendroclimatic and pollen‐inferred reconstructions of drought, forest composition and biomass for the last millennium with five ecosystem model simulations. In both observations and models, spatial patterns in ecosystem responses to hydroclimate variability are strongly governed by ecosystem sensitivity rather than climate exposure. Ecosystem sensitivity was higher in models than observations and highest in simpler models. Model‐data comparisons suggest that interactions among biodiversity, demography and ecophysiology processes dampen the sensitivity of forest composition and biomass to climate variability and change. Integrating ecosystem models with observations from timescales extending beyond the instrumental record can better understand and forecast the mechanisms regulating forest sensitivity to climate variability in a complex and changing world.

Published
2021

4. Author response for 'Forest responses to last-millennium hydroclimate variability are governed by spatial variations in ecosystem sensitivity'

Author

null Rollinson, Christine R., null Dawson, Andria, null Raiho, Ann M., null Williams, John W., null Dietze, Michael C., null Hickler, Thomas, null Jackson, Stephen T., null McLachlan, Jason, null Moore, David J. P., null Poulter, Benjamin, null Quaife, Tristan, null Steinkamp, Joerg, and null Trachsel, Mathias

Published
2020
Full Text
View/download PDF

5. Forest responses to last‐millennium hydroclimate variability are governed by spatial variations in ecosystem sensitivity

Author

Rollinson, Christine R., primary, Dawson, Andria, additional, Raiho, Ann M., additional, Williams, John W., additional, Dietze, Michael C., additional, Hickler, Thomas, additional, Jackson, Stephen T., additional, McLachlan, Jason, additional, JP Moore, David, additional, Poulter, Benjamin, additional, Quaife, Tristan, additional, Steinkamp, Jörg, additional, and Trachsel, Mathias, additional

Published
2020
Full Text
View/download PDF

6. Forest responses to last-millennium hydroclimate variability are governed by spatial variations in ecosystem sensitivity

Author

Rollinson, Christine, primary, Dawson, Andria, additional, Raiho, Ann, additional, Williams, John, additional, Dietze, Michael, additional, Hickler, Thomas, additional, Jackson, Stephen, additional, McLachlan, Jason, additional, Moore, David, additional, Poulter, Ben, additional, Quaife, Tristan, additional, Steinkamp, J rg, additional, and Trachsel, Mathias, additional

Published
2020
Full Text
View/download PDF

7. Comparison of settlement-era vegetation reconstructions for STEPPS and REVEALS pollen–vegetation models in the northeastern United States

Author

Trachsel, Mathias, primary, Dawson, Andria, additional, Paciorek, Christopher J., additional, Williams, John W., additional, McLachlan, Jason S., additional, Cogbill, Charles V., additional, Foster, David R., additional, Goring, Simon J., additional, Jackson, Stephen T., additional, Oswald, W. Wyatt, additional, and Shuman, Bryan N., additional

Published
2020
Full Text
View/download PDF

9. Reference Climate and Recent Change

Author

Scherrer, Simon C., Schwierz, Cornelia, Brönnimann, Stefan, Casanueva, Ana, Fukutome, Sophie, Graf, Michael Arthur, Martius, Olivia, Raible, Christoph, Trachsel, Mathias, Fischer, Andreas M., and Strassmann, Kuno M.

Subjects
550 Earth sciences & geology, 910 Geography & travel
Published
2018
Full Text
View/download PDF

11. Calibrating aquatic microfossil proxies with regression-tree ensembles

Author

University of Helsinki, Department of Geosciences and Geography, Salonen, J Sakari, Verster, Adrian J, Engels, Stefan, Soininen, Janne, Trachsel, Mathias, Luoto, Miska, University of Helsinki, Department of Geosciences and Geography, Salonen, J Sakari, Verster, Adrian J, Engels, Stefan, Soininen, Janne, Trachsel, Mathias, and Luoto, Miska

Published
2016

18. All age–depth models are wrong, but are getting better.

Author

Trachsel, Mathias and Telford, Richard J.

Subjects
*STRATIGRAPHIC geology, *SEDIMENTS, *BAYESIAN analysis, *RADIOCARBON dating, *VARVES
Abstract

The construction of accurate age–depth relationships and a realistic assessment of their uncertainties is one of the fundamental prerequisites for comparing and correlating late Quaternary stratigraphical proxy records. Four widely used age–depth modelling routines – CLAM, OxCal, Bacon and Bchron – were tested using radiocarbon dates simulated from varved sediment stratigraphies. All methods produce mean age–depth models that are close to the true varve age, but the uncertainty estimation differs considerably among models. Age uncertainties are usually underestimated by CLAM, whereas age uncertainties produced by Bchron are often too large. With OxCal and Bacon, the setting of model-specific parameters influences the estimated uncertainties, which vary from too large to too small. The variability of sediment accumulation rates is underestimated by CLAM but overestimated by Bacon and Bchron. Bayesian age–depth models mainly improve the assessment of uncertainties of age–depth models. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results