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International workshop on nitrogen footprints

Local reality and global connections

Hokkaido University in Sapporo, Japan, 16-18 March 2015

The workshop took place at the Field Science Center for Northern Biosphere, Hokkaido University, Japan during March 16-18th, 2015.  The 28 experts on nitrogen footprint research--including senior and young researchers, postdoc, graduate and undergraduate students--attended the workshop from the USA, Netherlands, Australia, Denmark, China, Taiwan and Japan.  The overall objectives of this workshop were:

  • To share the recent results, knowledge, and different approaches on nitrogen footprint research to help reduce anthropogenic nitrogen loads to the environment locally, regionally, and globally.
  • To find the knowledge gaps and the further research questions on the nitrogen footprint
  • To develop the next agenda of further international collaboration for global nitrogen footprint research.

There were 17 outstanding talks on various aspects and new findings related to nitrogen footprints. The talks ranged in approach (e.g., top-down, bottom, multi-regional input-output analyses) and scale (e.g., national footprints, regional/global footpints). We had break-out discussions to address the following questions:

  • “What are the similarities, differences, and global connections for national N footprints?”
  • “What are possible options to reduce the N footprint at multiple scales?”
  • “What do we need to further advance N footprint research?”

We had very interactive and fruitful discussions on those topics during the workshop and also during the social programs such as the workshop dinner. The synthesis of the workshop will be come out as an academic paper in a peer-reviewed journal shortly. For more information on the workshop results, please contact us at

The organizing committee: Hideaki Shibata (Hokkaido Univ., Japan), James Galloway (Univ. of Virginia, USA), Allison Leach (University of New Hampshire, USA), Kazuyo Matsubae (Tohoku Univ., Japan), Keisuke Nansai (National Institute for Environmental Studies, Japan), Shin-Ichiro Mishima (National Institute for Agro-Environmental Sciences, Japan), Ken Tasaki (Mitsubishi Chemical America, USA), Ming-Chien Su (National Dong Hwa University, Taiwan)

The funding support: The KAITEKI Institute Inc., Japan; Green Network of Excellence - Environmental information (funded by Ministry of Education, Culture, Sports, Science and Technology, Japan); National Institute for Agro-Environmental Sciences, Japan; National Institute for Environmental Studies, Japan; Ministry of Education, Taiwan; National Dong Hwa University, Taiwan; Advanced Research and Education Center for Steel (ARECS), Tohoku University, Japan