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Carole Bedos Sophie Génermont Edith Le Cadre Lucas Garcia Enrique Barriuso Pierre Cellier 《Atmospheric environment (Oxford, England : 1994)》2009,43(22-23):3630-3639
Volatilization of pesticides participates in atmospheric contamination and affects environmental ecosystems including human welfare. Modelling at relevant time and spatial scales is needed to better understand the complex processes involved in pesticide volatilization. Volt'Air-Pesticides has been developed following a two-step procedure to study pesticide volatilization at the field scale and at a quarter time step. Firstly, Volt'Air-NH3 was adapted by extending the initial transfer of solutes to pesticides and by adding specific calculations for physico-chemical equilibriums as well as for the degradation of pesticides in soil. Secondly, the model was evaluated in terms of 3 pesticides applied on bare soil (atrazine, alachlor, and trifluralin) which display a wide range of volatilization rates. A sensitivity analysis confirmed the relevance of tuning to Kh. Then, using Volt'Air-Pesticides, environmental conditions and emission fluxes of the pesticides were compared to fluxes measured under 2 environmental conditions. The model fairly well described water temporal dynamics, soil surface temperature, and energy budget. Overall, Volt'Air-Pesticides estimates of the order of magnitude of the volatilization flux of all three compounds were in good agreement with the field measurements. The model also satisfactorily simulated the decrease in the volatilization rate of the three pesticides during night-time as well as the decrease in the soil surface residue of trifluralin before and after incorporation. However, the timing of the maximum flux rate during the day was not correctly described, thought to be linked to an increased adsorption under dry soil conditions. Thanks to Volt'Air's capacity to deal with pedo-climatic conditions, several existing parameterizations describing adsorption as a function of soil water content could be tested. However, this point requires further investigation. Practically speaking, Volt'Air-Pesticides can be a useful tool to make decision about agricultural practices such as incorporation or for the estimation of overall pesticide volatilization rates, and it holds promise for time specific dynamics. 相似文献
93.
Mustafa Mokrech Susan Hanson Robert J. Nicholls Judith Wolf Mike Walkden Corentin M. Fontaine Sophie Nicholson-Cole Simon R. Jude James Leake Peter Stansby Andrew R. Watkinson Mark D. A. Rounsevell Jason A. Lowe Jim W. Hall 《Journal of Coastal Conservation》2011,15(3):325-335
The threat of sea-level rise and climate change means that coastal managers are being increasingly asked to make long-term assessments of potential coastal impacts and responses. In the UK, shoreline management planning (for flood and erosion hazards) and spatial planning now takes a 100 year perspective. An integrated framework across a wide range of physical and social issues is required for the assessment of coastal impacts and consequently for making sound management decisions. This paper provides an overview of the development of the ‘Tyndall Coastal Simulator’ including the underlying philosophy that is being followed. The Simulator is based on a series of linked climate models (CM) within a nested framework which recognises three spatial scales: (i) the global (GCM) scale; (ii) the regional scale and (iii) the Simulator Domain (a physiographic unit, such as a coastal sub-cell). Within the nesting, the larger scale provides the boundary conditions for the smaller scale. The models feed into each other and describe a range of relevant processes: sea level, tides, surges, waves, sediment transport and coastal morphology. Different climate scenarios, as well as the range of uncertainty, are being explored. Communication of results is a major issue and the Simulator includes a dedicated GIS-based user interface that allows a wide range of queries of model outputs. The paper demonstrates the possibility of developing an integrated framework that is multi-scale and capable of linking various models in order to simulate complex coastal processes and consequently allowing long-term assessments that are useful for setting future management plans. 相似文献
94.
According to almost all forward-looking studies, the world′s energy consumption will increase in the future decades, mostly because of the growing world population and the long-term development of emerging countries. The effort to contain global warming makes it hard to exclude nuclear energy from the global energy mix. 相似文献
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This paper examines how the concept of sustainable development is being put into practice by local policy partnership networks. We suggest that due to the highly contested nature of the concept, these networks are facing problems in trying to unravel what sustainable development actually means. Few organisations are grappling with the more fundamental implications of the concept and, as a result, policies for sustainability are being developed cheek by jowl with those of economic growth and competitiveness. Moreover, established local policy networks play a dominant role in defining a vision of sustainable development to the detriment of groups outside the policy process. Mechanisms and institutions need to be established to widen participation and debate on the issue and to draw upon lessons and ideas from organisations outside established networks, such as environmental and campaign groups, third sector organisations, community associations and socially responsible businesses. Este documento examina como el concepto de desarrollo sostenible esta siendo puesto en práctica por redes de sociedades normativas locales. Nosotros sugerimos que debido a la alta naturaleza competitiva del concepto, estas redes estan enfrentando problemas al tratar de desenredar lo que significa realmente desarrollo sostenible. Pocas organizaciones están intentando resolver las implicaciones mas fundamentals del concepto y como resultado las políticas para la sostenibilidad estan siendo desarrolladas lado a lado con esas de crecimiento económico y competitividad. Además, las redes normativas locales establecidas juegan un papel predominante en definir una visión de desarrollo sostenible para el detrimento de grupos por fuera del proceso regulador. Los mecanismos y las instituciones necesitan ser establecidos para ampliar la participación y debatir sobre el asunto y para deducir sobre lecciones e ideas tomadas de organizaciones por fuera de las redes establecidas tales como grupos ambientales y de campaña, organizaciones del tercer sector, asociaciones comunitarias y negocios socialmente responsables. 相似文献
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Fang Chen Ping Liu Ying Gu Zhu Zhu Amulya Nanisetti Zhangzhang Lan Zhiwei Huang Jia Sophie Liu Xiongbin Kang Yuqing Deng Liqiong Luo Dan Jiang Yong Qiu Jianchang Pan Jun Xia Ken Xiong Chao Liu Lin Xie Qianyu Shi Jing Li Xiuqing Zhang Wei Wang Snezana Drmanac Lars Bolund Hui Jiang Radoje Drmanac Xun Xu 《黑龙江环境通报》2017,37(13):1311-1321
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