Ecological Models and Data Intercomparison (EMDI): A proposal for an EMDI III Workshop (Ft.Collins, Colorado in March 2002)

国际地圈-生物圈计划(IGBP)全球分析、集成和建模工作组(GAIM)的生态系统模型-数据相互比较(EMDI)计划正在促进国际建模和数据合成团队之间的互动，这超出了任何单独团队可以合理提出或资助的范围。这项提议是关于2002年3月在国家生态分析与综合中心(NCEAS)举办第三次EMDI研讨会。拟议的讲习班将侧重于发展对碳循环中的性质和地理差异的新认识，其基础是先前的两次讲习班，在这两次讲习班中进行了模型相互比较和模型数据比较。本次研讨会将着重于区域和全球生态系统模型结果的空间分析，包括观测到的年度净初级生产力(NPP)、季节NPP以及来自FLUXNET通量塔观测的碳通量的时间序列。将进一步分析模型结果和新的IGBP-DIS/GAIM全球初级生产数据倡议(GPPDI)数据集。将模型产出与实地测量结果进行比较，将有助于确定我们对建立模型的碳循环动态所依据的过程和机制的信心程度。研讨会还将加强开发模型的科学家和进行现场测量的科学家之间正在进行的合作。

The Ecosystem Model-Data Intercomparison (EMDI) program of the International Geosphere- Biosphere Programme (IGBP) task force on Global Analysis, Integration, and Modelling (GAIM) is facilitating interactions between international modeling and data synthesis teams, beyond what any individual team can reasonably propose or fund. This proposal is for a third EMDI workshop to be held at the National Center for Ecological Analysis and Synthesis (NCEAS) in March, 2002. The proposed workshop will focus on the development of a new understanding of the nature and geographic variations in the carbon cycle, based on two earlier workshops in which model intercomparisons and model-data comparisons have been carried out. This workshop will focus on spatial analyses of regional and global ecosystem model results with observed annual net primary productivity (NPP), seasonal NPP, and time-series of carbon fluxes from FluxNet flux tower observations. Further analyses of model results and the new IGBP-DIS/GAIM Global Primary Production Data Initiative (GPPDI) data sets will be made. The comparisons of model outputs with field measurements will help to establish the level of confidence that we have in the processes and mechanisms that underlie the modeled carbon cycle dynamics. The workshop will also increase the ongoing collaboration between scientists developing models and those conducting field measurements.