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初冬时期闽江河口区养殖塘排水后的CH_4和N_2O通量日变化特征 被引量:10
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作者 杨平 谭立山 +2 位作者 黄佳芳 何清华 仝川 《环境科学》 EI CAS CSCD 北大核心 2018年第1期300-309,共10页
排水活动是河口区养殖塘鱼、虾捕获后的重要管理方式之一.为探讨排水活动对河口区养殖塘温室气体通量的影响,采用静态(悬浮)箱-气相色谱法对初冬时期闽江河口区的未排干和排干养殖塘温室气体(CH_4和N_2O)通量日变化特征进行原位观测.结... 排水活动是河口区养殖塘鱼、虾捕获后的重要管理方式之一.为探讨排水活动对河口区养殖塘温室气体通量的影响,采用静态(悬浮)箱-气相色谱法对初冬时期闽江河口区的未排干和排干养殖塘温室气体(CH_4和N_2O)通量日变化特征进行原位观测.结果表明,(1)未排干与排干养殖塘CH_4通量范围分别介于0.04~0.10 mg·(m^2·h)^(-1)和14.04~33.72 mg·(m^2·h)^(-1),均值分别为(0.07±0.01)mg·(m^2·h)^(-1)和(24.74±2.33)mg·(m^2·h)^(-1),均表现为大气库中CH_4释放源,呈现夜高昼低的特征;(2)未排干养殖塘N_2O通量范围和均值分别介于-0.027~0.011 mg·(m^2·h)^(-1)和(0.002±0.004)mg·(m^2·h)^(-1),整体上呈现昼低夜高的特征,而排干养殖塘N_2O通量范围和均值分别介于0.59~1.76 mg·(m^2·h)^(-1)和(1.07±0.15)mg·(m^2·h)^(-1),整体上呈现昼高夜低的特征.以上研究结果初步揭示,排干初期的河口区养殖塘排水活动不仅显著增加温室气体(CH_4和N_2O)排放强度,也可以显著改变养殖塘温室气体通量的日动态特征. 展开更多
关键词 浅水池塘 温室气体 排水活动 日变化 环境因素 河口区
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Human Mobility in the Sendai Framework for Disaster Risk Reduction 被引量:1
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作者 Lorenzo Guadagno 《International Journal of Disaster Risk Science》 SCIE CSCD 2016年第1期30-40,共11页
This article looks at how population movements are addressed by the Sendai Framework for Disaster Risk Reduction 2015–2030(SFDRR), and highlights some of the potential implications of the SFDRR on disaster risk reduc... This article looks at how population movements are addressed by the Sendai Framework for Disaster Risk Reduction 2015–2030(SFDRR), and highlights some of the potential implications of the SFDRR on disaster risk reduction(DRR) and mobility management work. The article looks at the operational implications of the SFDRR text and covers issues of including migrants in DRR work;informing urban development about current and future mobility trends; managing relocations, evacuations, and displacement to prevent future risks and reduce existing ones; and preparing for and managing disaster-induced population movements to reduce the direct and indirect impacts of natural hazards. Overall, the references to human mobility within the SFDRR show an evolution in the way the issue is considered within global policy dialogues. Both the potential of population movements to produce risk and their role in strengthening the resilience of people and communities are now clearly recognized. This is an evolution of previously prevailing views of mobility as the consequence of disasters or as a driver of risk. While some implications of the DRR-mobility nexus might still be missing from DRR policy, population movements are now recognized as a key global risk dynamic. 展开更多
关键词 Disaster risk reduction DISPLACEMENT Human mobility MIGRATION RELOCATION Sendai framework for disaster risk reduction
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