Workshop: CO2 and Climate Change Effects on Plants and Soil;to be held Washington, DC; November 1992

自工业革命开始以来，大气中的二氧化碳浓度已经上升了大约25%，从280ppmv上升到350ppmv。目前的气候模型估计，即使人为排放的二氧化碳能够保持在目前的速度，到2050年，大气中的二氧化碳也将增加到大约450ppmv，到2100年将增加到大约520ppmv(IPCC 1990)。大气二氧化碳浓度的这些增加，加上甲烷和一氧化二氮等其他温室气体浓度的增加，预计将导致全球气候变化，包括气温上升和水文循环的变化。二氧化碳浓度和气候的同时变化将如何影响相关的植物和土壤过程？这是当今关键的环境问题之一。美国国家范围委员会(环境问题科学委员会)将举办一次研讨会，探讨植被和土壤对二氧化碳增加和气候变化的相关反应。讲习班的目标是：1)结合当前对二氧化碳和气候变化对自然和管理的相互关联的植被和土壤系统的影响的认识。2)评估我们预测自然生态系统和农业生态系统对二氧化碳和气候同时变化的反应的能力。实现这些目标需要农学家、生态学家、植物生理学家和土壤学家的贡献。实验者和模型师都将被邀请，因为研讨会的一个关键目的是改善那些就增加二氧化碳和土地利用进行实验室和实地研究的科学家与那些通过使用模型预测大气和气候变化对生态系统的潜在影响的科学家之间的沟通。

Since the beginning of the industrial revolution the CO2 concentration in the atmosphere has risen by approximately 25%, from 280 ppmv to 350 ppmv. Current climate models estimate that even if man-made emissions of CO2 could be kept at present rates, atmospheric CO2 would increase to about 450 ppmv by the year 2050, and to about 520 ppmv by the year 2100 (IPCC 1990). These increases in atmospheric CO2 concentration, combined with increases in the concentrations of other greenhouse gases such as methane and nitrous oxide, are predicted to lead to global climate change comprised of higher temperatures and changes in the hydrological cycle. How will simultaneous changes of CO2 concentration and climate affect linked plant and soil processes? This is one of today's critical environmental questions. The U.S. National Committee of SCOPE (Scientific Committee on Problems of the Environment) will hold a workshop on linked vegetation and soil responses to increasing CO2 and climate change. The goals of the Workshop are: 1) To coalesce current understanding of CO2 and climate change effects on linked vegetation and soil systems, both natural and managed. 2) To evaluate our ability to predict responses of both natural ecosystems and agroecosystems to simultaneous changes in CO2 and climate. Contributions from agronomists, ecologists, plant physiologists, and soil scientists will be needed to accomplish these goals. Both experimentalists and modeler will be invited because a crucial aim of the workshop is to improve communication between those scientists conducting laboratory and field research on increasing CO2 and land use and those scientists who are projecting the potential effects of changing atmosphere and climate on ecosystems through the use of models.