排序方式: 共有165条查询结果,搜索用时 203 毫秒
161.
为探寻快速城镇化地区资源优化配置方式,实现区域内“三生空间”可持续发展,以乌鲁木齐市2004—2018年间3期的Landsat遥感影像为数据源,并建立以“三生空间”为主导的土地利用类型分类体系,采用ArcGIS分析15年间乌鲁木齐市土地利用功能转型特征及生态服务价值时空演变规律。结果表明:(1)15年间乌鲁木齐市的生活生产空间呈现持续扩张的趋势,生产生态空间和生态生产空间都出现先上升后下降的趋势,生态空间持续下降,生活生产空间的大幅增长来自其对生态空间以及生产生态空间的占用;(2)2004—2018年间乌鲁木齐市生态服务价值下降了13.87%,生态空间的生态服务价值下降总量最大;(3)未来应重点保护和规划生态空间内的林地、草地以及湿地等,高效集约利用生活、生产功能用地。 相似文献
162.
Wen Lei Song Qianqian 《Environmental science and pollution research international》2022,29(50):75550-75565
Environmental Science and Pollution Research - In order to find the model of rural energy transformation in Henan Province. In this paper, Tapio decoupling model is employed to investigate the... 相似文献
163.
Huang Qianqian Peng Benhong Sheng Xin Wan Anxia 《Environment, Development and Sustainability》2022,24(8):9985-10004
Environment, Development and Sustainability - Peoples’ livelihood and environmental governance are interrelated and interact with each other, which is a new starting point for the study of... 相似文献
164.
Dou Qianqian Gao Xinwei 《Environmental science and pollution research international》2022,29(45):67856-67874
Environmental Science and Pollution Research - The digital economy, which gradually emerged with a new generation of information technologies, has become an unavoidable reality for manufacturing... 相似文献
165.
Vertical distribution and temporal evolution of formaldehyde and glyoxal derived from MAX-DOAS observations: The indicative role of VOC sources 下载免费PDF全文
Zhenfeng Wu Qianqian Hong Cheng Liu Qihou Hu Yanli Zhang Chengzhi Xing Jinping Ou Wei Tan Haoran Liu Xiaoqing Huang 《环境科学学报(英文版)》2022,34(12):92-104
Formaldehyde (HCHO) and glyoxal (CHOCHO) are important oxidization intermediates of most volatile organic compounds (VOCs), but their vertical evolution in urban areas is not well understood. Vertical profiles of HCHO, CHOCHO, and nitrogen dioxide (NO2) were retrieved from ground-based Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations in Hefei, China. HCHO and CHOCHO vertical profiles prefer to occur at higher altitudes compared to NO2, which might be caused by the photochemistry-oxidation of longer-lived VOCs at higher altitudes. Monthly means of HCHO concentrations were higher in summer, while enhanced amounts of NO2 were mainly observed in winter. CHOCHO exhibited a hump-like seasonal variation, with higher monthly-averaged values not only occurred in warm months (July-August) but also in cold months (November-December). Peak values mainly occurred during noon for HCHO but emerged in the morning for CHOCHO and NO2, suggesting that HCHO is stronger link to photochemistry than CHOCHO. We further use the glyoxal to formaldehyde ratio (GFR) to investigate the VOC sources at different altitudes. The lowest GFR value is almost found in the altitude from 0.2 to 0.4 km, and then rises rapidly as the altitude increases. The GFR results indicate that the largest contributor of the precursor VOC is biogenic VOCs at lower altitudes, while at higher altitudes is anthropogenic VOCs. Our findings provide a lot more insight into VOC sources at vertical direction, but more verification is recommended to be done in the future. 相似文献