Workshop on N2 Production from Denitrification, Spring 2004

PI将于2004年春季举办为期3天的研讨会，约有30人参加，重点是通过生物脱氮量化N2生产。 该讲习班的目标是：（1）评估我们对广泛的陆地和水生生态系统中的反硝化速率的了解状况;（2）比较不同科学学科所采用的方法，以期跨学科的合作能够产生方法上的进步;以及（3）列出目前的弱点和解决这些弱点所需的行动，以改进对生物圈中活性氮在何处、何时以及有多少转化为N2的全球评估。 两个重要的考虑因素将叠加在一个矩阵的生态系统类型和方法学的方法：（1）什么是适当的尺度上，N2生产可以和应该被测量？以及（2）如何将模型与测量相结合，以提高对过程的机械理解，并允许在更大的空间尺度、更长的时间尺度和一系列预测情景下估计通量？ 研讨会的成果将作为一份或多份综合论文在同行评审期刊上发表。 这项活动的更广泛的影响包括努力指导对氮循环的科学理解，以找到解决社会对生物圈富营养化问题的解决方案。 该讲习班是作为国际氮倡议的一个组成部分举办的，该倡议是SCOPE和IGBP的一个联合项目。 INI的总体目标是优化氮在可持续粮食和能源生产中的作用，同时最大限度地减少对人类健康和环境的负面影响。 因此，本次研讨会是一项努力的一部分，通过为未来的全球氮循环管理提供知识，以满足粮食安全和环境质量的目标，对社会产生了广泛的影响。

The PIs will hold a 3-day workshop in the spring of 2004 of about 30 participants to focus on quantification of N2 production via biological denitrification. The objectives of this workshop will be: (1) to evaluate the state of our knowledge of denitrification rates in a wide range of terrestrial and aquatic ecosystems; (2) to compare methodologies that have been adopted by different scientific disciplines, with the expectation that collaborations across disciplines could yield methodological advances; and (3) to chart out the current weaknesses and the actions needed to address those weaknesses for an improved global assessment of where, when, and how much reactive N is converted to N2 in the biosphere. Two important considerations will be superimposed over a matrix of ecosystem types and methodological approaches: (1) What are the appropriate scales over which N2 production can and should be measured?; and (2) How can models be integrated with the measurements to improve mechanistic understanding of the processes and permit estimation of fluxes at larger spatial scales, longer temporal scales, and across a range of forecasted scenarios? The results of the workshop will be published as one or more synthesis papers in a peer reviewed journal. The boarder impacts of this activity include an effort to direct scientific understanding of the N cycle toward finding solutions to society's concerns about eutrophication of the biosphere. The workshop is being organized as an integral part of the International Nitrogen Initiative (INI), a joint project of SCOPE and IGBP. The overall goal of the INI is to optimize nitrogen's role in sustainable food and energy production, while minimizing negative effects on human health and the environment. Hence, this workshop is part of an effort that has board implications for society by contributing knowledge to future management the global N cycle to meet objectives of both food security and environmental quality.