Taking off the training wheels: the properties of a dynamic vegetation model without climate envelopes, CLM4.5(ED)

被引：192

作者：

Fisher, R. A. ^{[1
]}

Muszala, S. ^{[1
]}

Verteinstein, M. ^{[1
]}

Lawrence, P. ^{[1
]}

Xu, C. ^{[2
]}

McDowell, N. G. ^{[2
]}

Knox, R. G. ^{[3
]}

Koven, C. ^{[3
]}

Holm, J. ^{[3
]}

Rogers, B. M. ^{[4
]}

Spessa, A. ^{[5
,6
]}

Lawrence, D. ^{[1
]}

Bonan, G. ^{[1
]}

机构：

[1] Natl Ctr Atmospher Res, Boulder, CO 80305 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87454 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[4] Woods Hole Res Ctr, Falmouth, MA USA

[5] Open Univ, Dept Environm Earth & Ecosyst, Milton Keynes MK7 6AA, Bucks, England

[6] Max Planck Inst Chem, Dept Atmospher Chem, D-55128 Mainz, Germany

来源：

GEOSCIENTIFIC MODEL DEVELOPMENT | 2015年 / 8卷 / 11期

基金：

美国国家科学基金会;

关键词：

COMPUTATIONALLY EFFICIENT METHOD; CARBON-CYCLE FEEDBACKS; EARTH SYSTEM MODEL; ROOT TURNOVER; TERRESTRIAL ECOSYSTEMS; INTERNAL VARIABILITY; BENCHMARKING SYSTEM; PLANT GEOGRAPHY; GLOBAL CLIMATE; RAIN-FOREST;

D O I：

10.5194/gmd-8-3593-2015

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We describe an implementation of the Ecosystem Demography (ED) concept in the Community Land Model. The structure of CLM(ED) and the physiological and structural modifications applied to the CLM are presented. A major motivation of this development is to allow the prediction of biome boundaries directly from plant physiological traits via their competitive interactions. Here we investigate the performance of the model for an example biome boundary in eastern North America. We explore the sensitivity of the predicted biome boundaries and ecosystem properties to the variation of leaf properties using the parameter space defined by the GLOPNET global leaf trait database. Furthermore, we investigate the impact of four sequential alterations to the structural assumptions in the model governing the relative carbon economy of deciduous and evergreen plants. The default assumption is that the costs and benefits of deciduous vs. evergreen leaf strategies, in terms of carbon assimilation and expenditure, can reproduce the geographical structure of biome boundaries and ecosystem functioning. We find some support for this assumption, but only under particular combinations of model traits and structural assumptions. Many questions remain regarding the preferred methods for deployment of plant trait information in land surface models. In some cases, plant traits might best be closely linked to each other, but we also find support for direct linkages to environmental conditions. We advocate intensified study of the costs and benefits of plant life history strategies in different environments and the increased use of parametric and structural ensembles in the development and analysis of complex vegetation models.

引用

页码：3593 / 3619

页数：27

共 155 条

[21] Improving plant functional groups for dynamic models of biodiversity: at the crossroads between functional and community ecology [J].