A fundamental study on a CO_2-dimate-vegitation system

CO_2-二甲酸盐植被系统的基础研究

• 批准号: 10308024
• 负责人: KIDA Hideji
• 金额: $ 18.43万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10308024/
• 关键词: CO_2; carbon dioxide; climate change; climate model; Terrestrial Bio. Model; global warming

Along the main purpose of the research project, a numerical simulation was conducted on the transports, sinks and sources of CO2 using a global transport model developed in this research project. A regional model was also applied to a high-resolution smulation of transport in order to study the regional CO2 budget. This research has showed that the model will be usable to join our vegitation model with the climate model.Some numerical potential questions on use of a regional-area climate model was almost not serious in long-term integrations but practically away from problem, so the regional high-resolution climate model run very well. In the near future we need to increase the resolution of the numerical model for the more acurate simulations than the present.We have begun a study on a combined climate-vegitation simulation. The first stage was grossly well done with given parameters of climate factors such as temperature, presipitation, humidity, soil wetness, and CO2 mixing ration. An interesting result is that the modeled vegitation over huge desert areas completely disappeared. This must be, however, checked by many respects to confirm whether it is real or not. It have been suggested that the vegitation models are very sensitive to conditions of meteorological and climatological factors.The present fundamental research project was original in the worldwide and the first stage to investigate a combined system of CO2-climate-vegitation from interdisciplinary approaces. We have clearly showed the potentiality of modeling the combained system.

根据该研究项目的主要目的，使用本研究项目中开发的全球传输模型对二氧化碳的传输、汇和来源进行了数值模拟。区域模型还应用于高分辨率交通模拟，以研究区域二氧化碳预算。这项研究表明，该模型可用于将我们的植被模型与气候模型结合起来。使用区域气候模型的一些潜在数值问题在长期集成中几乎不严重，但实际上远离问题，因此区域高分辨率气候模型运行得很好。在不久的将来，我们需要提高数值模型的分辨率，以实现比现在更准确的模拟。我们已经开始了气候-植被联合模拟的研究。在给定的气候因素参数（例如温度、降水量、湿度、土壤湿度和二氧化碳混合比）的情况下，第一阶段做得非常好。一个有趣的结果是，模拟的大片沙漠地区的植被完全消失了。但这必须从多方面进行验证，以确认其是否真实。有人认为，植被模型对气象和气候因素条件非常敏感。本研究项目为国际原创，也是第一阶段从跨学科的角度研究CO2-气候-植被组合系统。我们已经清楚地展示了对组合系统进行建模的潜力。