Integrated assessment of global warming influence of ecosystems based on ecosystem global warming potential

基于生态系统全球变暖潜势的生态系统全球变暖影响综合评估

基本信息

批准号：
15310004
负责人：
MARIKO Shigeru
金额：
$ 9.6万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15310004/
关键词：
Carbon dioxide Gas flux GIS Global warming Ecosystem Methane Nitrogen monoxide Global warming potential 生態系温暖化ポテンシャル CO2 CH4 N2O

项目摘要

Our aim is to assess the influence of ecosystems on global warming based on the budgets of three greenhouse-effect gases (CO_2,CH_4,N_2O) between the atmosphere and ecosystems. The data of the gas fluxes were obtained from in situ measurements by some chamber methods and survey of previous papers. Here, gas influx to the ecosystem has a positive unit, and gas efflux from the ecosystem a negative unit. Based on global warming potential (GWP,IPCC 1996), the fluxes of CH_4 and N_2O were converted into an equivalent of CO_2. The sum of CO_2 flux and CO_2-equivalent fluxes of CH_4 and N_2O is defined as ecosystem global warming potential (EGWP).1.EGWPs in various types of ecosystemsStudied ecosystems (forest, grassland, wetlands, agroecosystems including croplands, rice paddy fields, orchards) were a sink for CO_2, a sink for CH_4 except wetlands, N2O and a weak source for N_2O. The strongest source of N_2O was croplands which were supplied with chemical fertilizer. The calculated EGWPs were positive in all the ecosystems, and the magnitude differed between ecosystems. Forests showed the highest EGWP, and wetlands the lowest EGWP. In agroecosystems, EGWP assessment revealed that croplands were wrong, rice paddy fields neutral, and orchards excellent.2.Case study of global warming influence on a regional scale based on EGWPLand use in Yamanashi Prefecture was mapped with a GIS technique. The map was overlaid with an EGWP distribution map. The analysis of the EGWP map suggests that EGWP assessment method developed by this study is available for planning future management of ecosystems.The obtained results will be published as some original papers.

我们的目的是根据大气和生态系统之间三种温室效应气体（CO_2，CH_4，N_2O）的预算来评估生态系统对全球变暖的影响。气通量的数据是通过某些腔室方法和先前论文的调查从原位测量中获得的。在这里，生态系统的气体涌入具有正单位，而来自生态系统的气体排出为负单位。基于全球变暖电位（GWP，IPCC 1996），CH_4和N_2O的磁通量被转换为相当于CO_2的。 CH_4和N_2O的CO_2通量和co_2等效通量的总和定义为生态系统全球变暖潜力（EGWP）.1.EGWPS .1.EGWPS .1.EGWPS。生态系统所研究的生态系统中的EGWP N_2O的湿地，N2O和弱来源。 N_2O的最强来源是耕地，这些农田提供了化肥。在所有生态系统中，计算出的EGWP均为阳性，生态系统之间的幅度也有所不同。森林显示出最高的EGWP，而湿地最低的EGWP。在农业生态系统中，EGWP评估表明，农田是错误的，稻田中立的，果园很出色。2。基于Yamanashi县的EGWPLAND使用，对全球变暖对区域尺度的影响进行了研究，并用GIS技术绘制了。该地图用EGWP分布图覆盖。对EGWP图的分析表明，本研究开发的EGWP评估方法可用于计划生态系统的未来管理。获得的结果将作为一些原始论文发表。