大气中的CO2在巨型城市杭州,中国:城郊差异,来源和影响因素
Yuanyuan Chen1, Yanran Lu1, Bing Qi2
1Zhejiang Carbon Neutral Innovation Institute & Zhejiang International Cooperation Base for Science and Technology on Carbon Emission Reduction and Monitoring, Zhejiang University of Technology, Hangzhou 310014, China; College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
The Science of the total environment
|March 15, 2024
概括
杭州大气中的二氧化碳监测显示,城市和郊区之间的差异比中国其他城市要小. 高海拔站提供了更准确的区域背景二氧化碳评估.
科学领域:
- 大气化学和物理大气化学和物理
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 城市地区有限的大气二氧化碳 (CO2) 监测阻碍了对城市和郊区差异的理解.
- 杭州是中国经济最发达地区的大都市,需要详细的二氧化碳分析.
研究的目的:
- 调查杭州大气二氧化碳水平,日间和季节性变化的城市和郊区差异.
- 确定影响二氧化碳度的潜在来源和影响因素.
- 为了建立一个更准确的基准区域二氧化碳排放在长江三角洲.
主要方法:
- 利用了来自三个大气观测站的数据:杭州 (HZ),临安 (LAN) 和高海拔的达明山 (DMS).
- 从2020年11月到2021年10月,分析了大气中的CO2分子分数.
- 与正常化差异植被指数 (NDVI) 和边界层高度相关的CO2变化.
主要成果:
- 年平均二氧化碳度:HZ (446.52 ppm),LAN (441.56 ppm),DMS (422.02 ppm). 气体中的二氧化碳度是每年平均每年的二氧化碳度.
- 杭州的城市-郊区二氧化碳差异不如中国其他主要城市那么明显.
- DMS测量提供了更具代表性的背景二氧化碳水平,这表明LAN可能会高估区域背景约10.92 ppm.
结论:
- 高海拔的DMS站对于长江三角洲地区精确的区域二氧化碳背景评估至关重要.
- 植物树冠显著影响较低海拔地区的季节性二氧化碳变化.
- 边界层高度对低海拔站的影响比高海拔站更大.
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