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、整合和建模（GAIM）工作组的生态系统模型-数据比对（EMDI）计划正在促进国际建模和数据合成团队之间的互动，超出任何单个团队可以合理提出或资助的范围。本提案是为2002年3月在国家生态分析与综合中心（NCEAS）举行的第三次EMDI研讨会而提出的。拟议的讲习班将侧重于发展对碳循环的性质和地理变化的新认识，其基础是先前的两次讲习班，其中进行了模式间比较和模式数据比较。本次研讨会将重点关注区域和全球生态系统模型结果的空间分析，其中包括观测到的年度净初级生产力（NPP）、季节性NPP以及来自FluxNet通量塔观测的碳通量时间序列。将对模型结果和新的IGBP-DIS/GAIM全球初级生产数据倡议（GPPDI）数据集进行进一步分析。将模型输出与实地测量结果进行比较，将有助于建立我们对模拟碳循环动力学的过程和机制的信心水平。该研讨会还将加强开发模型的科学家与进行实地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.