共查询到20条相似文献，搜索用时 31 毫秒
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J. Williams 《Journal of Atmospheric Chemistry》2005,50(1):101-102
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Ted Munn founded Boundary-Layer Meteorology in 1970 and served as Editor for 75 volumes over a 25 year period. This short article briefly reviews Ted's scientific career with the Atmospheric Environment Service (of Canada), the International Institute for Applied Systems Analysis in Austria and with the Institute of Environmental Studies at the University of Toronto, and as editor of this journal. 相似文献
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长期以来,美国因缺少联邦政府层面的气候行动计划而受到国际社会的指责。这一情况在奥巴马总统的第二执政期有所改变。2013年6月,奥巴马行政当局发布《总统气候行动计划》,被认为是迄今为止最为全面的联邦气候变化应对计划。本文通过梳理行动计划的主要内容,从美国自身和国际社会角度分析了该行动计划出台的各种因素及影响,指出奥巴马行政当局旨在通过启动该气候行动和整合行政资源,修复国家气候战略,提升政治影响,同时此举有助于扭转美国在国际气候谈判中的被动地位,并重新确立领导地位。 相似文献
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LAURA GALLARDO JORGE CARRASCO GUSTAVO OLIVARES 《Tellus. Series B, Chemical and physical meteorology》2000,52(1):50-59
Increases in tropospheric ozone (O3 ) abundance are likely to take place in the near future in the populous and rapidly developing countries in the tropics and subtropics. An accurate evaluation of the future impact of increasing industrial activities in tropical and subtropical areas requires knowledge of the background levels of ozone. New ozone monitoring stations have been installed at several sites by the World Meteorological Organization (WMO) since the mid‐90s. We analyze ozone data collected during two years since April 1996 at Cerro Tololo (30°S, 70°W, 2200 m.a.s.l.) some 50 km east from the city of La Serena. In this paper, we describe some of the atmospheric chemistry and meteorology that characterizes the Tololo site. The data show a seasonal variation with maximum mixing ratios in late winter and spring and minimum mixing ratios in late summer and early fall. These variations are most likely associated with the large‐scale subsidence of the Hadley circulation and the location of the subtropical jet stream (STJ). Also, there is a diurnal variation that is probably partly associated with a mountain wind flow which is strongest in late spring and summer months. No significant mixing with marine boundary layer air perturbed by anthropogenic activities is apparent from the data. We find the Cerro Tololo site to be generally representative for background conditions of free‐tropospheric air in the subtropics of the Southern Hemisphere. This work is done within the framework of a larger effort recently started by several Chilean institutions in cooperation with research centers abroad. 相似文献
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Stuart A. Penkett 《Journal of Atmospheric Chemistry》2005,52(3):319-321
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Nick Hewitt 《Journal of Atmospheric Chemistry》2005,50(3):321-322
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Bertrand Hamaide 《Climate Policy》2003,3(2):171-177
Cooperation in the economic sense considers efficiency issues. Cooperation in the political sense, like the Kyoto Protocol, considers other issues like equity and historical responsibility. The environmental and economic impacts of the Kyoto Protocol and other scenarios are thus examined. The US pullout may then be viewed, among others, as the result of not untying “economic” and “political” cooperation; and since the Protocol will be much less effective without the US, it is shown that an external economic stimulus should and may theoretically be found for retaining their participation. 相似文献