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.

我们的目的是根据三种温室效应气体（CO_2、CH_4、N_2O）在大气和生态系统之间的预算来评估生态系统对全球变暖的影响。气体通量的数据是通过一些腔室方法的现场测量和对以前论文的调查获得的。这里，流入生态系统的气体具有正单位，而从生态系统流出的气体具有负单位。根据全球变暖潜势(GWP,IPCC 1996),将CH_4和N_2O的通量换算成CO_2的当量。 CO_2通量与CH_4和N_2O的CO_2当量通量之和定义为生态系统全球变暖潜势(EGWP)。1.各类生态系统的EGWP研究的生态系统(森林、草地、湿地、农业生态系统包括农田、稻田、果园) )是CO_2的汇、除湿地之外的CH_4的汇、N2O和N_2O的弱源。 N_2O的最强来源是施用化肥的农田。计算出的 EGWP 在所有生态系统中均为正值，且不同生态系统的大小不同。森林的 EGWP 最高，湿地的 EGWP 最低。在农业生态系统中，EGWP评估显示农田为错误，稻田为中性，果园为优秀。2.基于EGWP的区域尺度全球变暖影响案例研究利用GIS技术绘制了山梨县土地利用图。该地图上覆盖有 EGWP 分布图。对EGWP图的分析表明，本研究开发的EGWP评估方法可用于规划未来的生态系统管理。获得的结果将作为一些原创论文发表。