نتایج جستجو برای: greenhouse gases

تعداد نتایج: 69589  

2007
J. D. Mahlman

Mankind's actix~itieshave increased carbon dioxide (CO?) in the atmosphere. This increase has the potential to warm the earth's climate by the "greenhouse effect" ( 1 ) in which COz ahsorbs infrared radiation and then re-radiates it back toward the surface of the planet. Other gases also act as greenhouse gases and may warm the climate ex7en further (Z),although human-produced airborne sulfate ...

2009
Margaret M Skutsch

Joint Implementation (JI) was a concept developed by the Conference of Parties (CoP) to the UN Framework Convention on Climate Change (UNFCCC) to help reduce the level of greenhouse gases, particularly CO2, in the global atmosphere. In JI projects, an organisation in a developed country invests in an organisation in a less developed country with the aim of reducing atmospheric greenhouse gases....

2006
M. N. Hansen K. Henriksen S. G. Sommer

Separation of slurry produces a solid fraction that is stored in manure heaps before being used as a fertiliser in crop production. Considerable amounts of ammonia (NH3) and greenhouse gases may be emitted during storage, which has deleterious environmental effects. The emission levels can be expected to depend on oxygenation level inside the bulk of the stored manure and therefore on storage c...

2013
Harald E. Rieder Lorenzo M. Polvani

[1] It has been suggested that the Arctic ozone losses observed in recent years might be a manifestation of climate change due to increasing greenhouse gases. We here offer evidence to the contrary, by focusing on the volume of polar stratospheric clouds (VPSC), a convenient proxy for polar ozone loss whose simplicity allows for easily reproducible results. First, we analyze the time series of ...

2003
Marc VIELLE Alain. L. BERNARD

Though the Kyoto Protocol concerns six greenhouse gases, most appraisals in the past have focused exclusively on CO2. But it is now acknowledged that, at least for some countries, there is an important potential of abating non-CO2 greenhouse gases with a relatively low cost. It is then the topic of the paper to present a multi-gas assessment of the Kyoto Protocol and to compare the results with...

2009
Cynthia Rosenzweig

concentration of carbon dioxide (CO 2 ) by some 30 percent since the industrial revolution, and that rise continues at a rate of approximately 0.4 percent per year. Despite its seemingly minute concentration (only 0.035 percent), CO 2 inhibits the escape of longwave (thermal) radiation emitted by the earth throughout the entire atmosphere, a process known as the “greenhouse effect.” The presenc...

2007
Richard Eckard

Introduction According to the National Greenhouse Gas Inventory (NGGI 2007) the agricultural sector contributes around 16% of national greenhouse gas emissions (Figure 1). The main greenhouse gases emitted from agriculture include methane lost during rumen digestion (enteric) and nitrous oxide lost from nitrogen fertilisers, animal excreta and soils (Figure 1). Agriculture accounts for 60% and ...

2017
Björn Hedin Philip Claesson

Food is a major contributor of greenhouse gases in the world. Changing what you eat to a less greenhouse gas intensive diet can have a major impact on the greenhouse gas emission. While campaigns and efforts about changing diets directed towards individuals have a potential to reduce total greenhouse gases, efforts directed towards institutional producers of meals have much greater potential to...

Journal: :تولید گیاهان زراعی 0
مجید عالیمقام دانشجوی کارشناسی ارشد اگرواکولوژی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان افشین سلطانی استاد گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان ابراهیم زینلی استادیار گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

application of appropriate agricultural operations is a strategy to reduce energy consumption and greenhouse gas emissions from agricultural productions process. in this study, fuel consumption and greenhouse gases emissions values for each farm operation was evaluated in gorgan and ali-abad katol to soybean product. all activities and production processes about operations were monitored and re...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید