Reducing uncertainty of high-latitude ecosystem models through identification of key parameters
Reducing uncertainty of high-latitude ecosystem models through identification of key parameters
复制标题
通过识别关键参数减少高纬度生态系统模型的不确定性
DOI:
10.1088/1748-9326/ace637
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发表时间:
2023
影响因子:
6.7
通讯作者:
Susanne Euskirchen, Eugenie
中科院分区:
文献类型:
--
作者:
Mevenkamp, Hannah;Wunderling, Nico;Bhatt, Uma;Carman, Tobey;Friedemann Donges, Jonathan;Genet, Helene;Serbin, Shawn;Winkelmann, Ricarda;Susanne Euskirchen, Eugenie
Climate change is having significant impacts on Earth's ecosystems and carbon budgets, and in the Arctic may drive a shift from an historic carbon sink to a source. Large uncertainties in terrestrial biosphere models (TBMs) used to forecast Arctic changes demonstrate the challenges of determining the timing and extent of this possible switch. This spread in model predictions can limit the ability of TBMs to guide management and policy decisions. One of the most influential sources of model uncertainty is model parameterization. Parameter uncertainty results in part from a mismatch between available data in databases and model needs. We identify that mismatch for three TBMs, DVM-DOS-TEM, SIPNET and ED2, and four databases with information on Arctic and boreal above-and belowground traits that may be applied to model parametrization. However, focusing solely on such data gaps can introduce biases towards simple models and ignores structural model uncertainty, another main source for model uncertainty. Therefore, we develop a causal loop diagram (CLD) of the Arctic and boreal ecosystem that includes unquantified, and thus unmodeled, processes. We map model parameters to processes in the CLD and assess parameter vulnerability via the internal network structure. One important substructure, feed forward loops (FFLs), describe processes that are linked both directly and indirectly. When the model parameters are data-informed, these indirect processes might be implicitly included in the model, but if not, they have the potential to introduce significant model uncertainty. We find that the parameters describing the impact of local temperature on microbial activity are associated with a particularly high number of FFLs but are not constrained well by existing data. By employing ecological models of varying complexity, databases, and network methods, we identify the key parameters responsible for limited model accuracy. They should be prioritized for future data sampling to reduce model uncertainty.
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DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
N. Madani;N. Parazoo
通讯作者:
N. Parazoo
影响因子:
3.7
作者:
Stavros, E. Natasha;Chrone, Jon;Cawse-Nicholson, Kerry;Freeman, Anthony;Glenn, Nancy F.;Guild, Liane;Kokaly, Raymond;Lee, Christine;Luvall, Jeffrey;Pavlick, Ryan;Poulter, Benjamin;Uz, Stephanie Schollaert;Serbin, Shawn;Thompson, David R.;Townsend, Philip A.;Turpie, Kevin;Yuen, Karen;Thome, Kurt;Wang, Weile;Zareh, Shannon-Kian;Nastal, Jamie;Bearden, David;Miller, Charles E.;Schimel, David
通讯作者:
Schimel, David
影响因子:
4.3
作者:
L. Stone;D. Simberloff;Yael A. Artzy‐Randrup
通讯作者:
L. Stone;D. Simberloff;Yael A. Artzy‐Randrup
影响因子:
64.8
作者:
Walker, Xanthe J.;Baltzer, Jennifer L.;Mack, Michelle C.
通讯作者:
Mack, Michelle C.
DOI:
10.1029/2018jg004504
发表时间:
2018-12
期刊:
Journal of Geophysical Research: Biogeosciences
影响因子:
--
作者:
B. Raczka;M. Dietze;S. Serbin;K. Davis
通讯作者:
B. Raczka;M. Dietze;S. Serbin;K. Davis