第一篇:全球变暖英文资料Globe warming
As we all know, there is a big problem on the earth, ‘Globe warming’.It is related to human’s survival, so we should know the whole system of the earth, then we will understand why the warming will destroy and kill the life.Glacier ice exists on all the continents except Australia.Mountain glaciers, in particular, are very sensitive indicators of climate change, the glaciers and the ice serve many functions.Firstly, during the Arctic winter, the air is colder than the water, the ice helps to insulate the water from the atmosphere, where there is no ice there’s a huge heat flow from the water to the atmosphere, which causes the air temperature to go up;Secondly, the ice also restricts the energy of the wind from causing waves near the ice, that’s why ships often stay near the ice, where the seas are calmer;Thirdly, the ice also acts as a mass exchange preventing ocean water from evaporating into the atmosphere, and since ice is white, it reflects the sun’s energy and keeps the system cool, without ice, the temperature of the earth would be likely to increase, perhaps significantly.Even a modest of 2 to 4 degrees, Fahrenheit could have a profound effect, some regions of the world might experience more rainfall which leads to floods, which would have impact on agriculture and forest growth.Fertile wet lands could be lost due to rises in sea level, and low-lying areas might experience flooding from melting water run off, higher temperatures in most areas of the world could become fertile breeding grounds.So, we
could see malaria in areas of the world where it never existed before.What cause the temperature goes up? There are many things affecting the balance of temperature.Such as ‘precipitation’, humidity’, ‘wind speed’, ‘slope’, and ‘reflectivity’, which we call natural phenomenon.Except those things, there is a major thing, ‘human activity’, for example, ‘fossil fuel’, there is an evidence of melting data which suggests that since 1850 some alpine glaciers have lost between 30% and 40% of their surface area and about 50% of their volume, similar findings have been reported in other glaciers around the world.Global compilations show that sea level has risen about 1/10 of an inch per year, which may not sound like a lot, but by the year 2100, sea level may rise by almost two feet, if this warming trend continues.So what we should do to protect our planet? We should follow the advice, ‘car pool’, ‘using transportation’, ‘by bike’, ‘planting trees’, and so on.
第二篇:全球变暖原因 英文
Global warming is the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation.Some of the reasons for global warming, mainly divided into two aspects of both human factors and natural factors: Human Factors:
1、Population factors
In recent years, the dramatic increase in population is one of the main factors that contribute to global warming.At the same time, it also seriously threatens the balance between natural ecological environment.So many people, only their own emissions of carbon dioxide each year will be a staggering Numbers, the result will lead to make the content of carbon dioxide in the atmosphere directly increase unceasingly, this form of carbon dioxide “greenhouse effect” will directly affect the earth's surface climate change.2、Atmospheric environmental pollution factors
At present, the increasingly serious environmental pollution has constituted a major global problem, is also one of the main factors that contribute to global warming.Now, on global climate change research has clearly pointed out that since the end of last century had started to rise the temperature of the earth's surface.3、Marine ecological environment deterioration factors
At present, the change of sea level is continuously rising, according to experts predict the next century, sea level could rise 50 cm.If you don't take on the measures, will directly cause the destruction of freshwater resources and pollution.In addition, land activities to produce large amounts of toxic chemical waste and solid waste constantly into the sea;Major in sea water in the oil(leak)events and caused by human activities such as coastal areas such as the destruction of the ecological environment is the main factor that leads to the ecological environment destruction.4、Land erosion, salinization, desertification and other factors
Land erosion, salinization, desertification and other factors, human activities such as for wood and deforestation, cultivated land used for agricultural production and overgrazing reason, is still a serious damage to vegetation.The world per minute on average 20 hectares of forest are destroyed, 10 hectares of land desertification, 47000 tons of soil erosion.Soil erosion decreased soil fertility and water retention, thus reducing the biological productivity of the soil and its ability to maintain productivity;And can cause a wide range of floods and dust storms, causing great economic losses to the society, and the worsening ecological environment.5、The forest resources in factors
Around the world, because of natural or man-made factors causing forest area is greatly reduced.6、Acid rain harm factors
The effects of acid rain to the ecological environment has become more and more attention all over the world.Acid rain can destroy forest, acidification lakes, endanger biological, etc.At present, the acid rain in the world more concentrated in Europe and North America, most of the acid rain occurred in developed countries, some developing countries, acid rain, also in the occurrence and development rapidly.7.、Factors accelerate extinctions Life on earth is a valuable human resources, and biodiversity is the foundation of human survival and development.But now the biological species on the earth are shrinking at an unprecedented rate.8、Water pollution factors
According to the global environment monitoring system for water quality monitoring project shows that about 10% of the global monitoring of the pollution of the river, since this century, the human water consumption is dramatically increased, at the same time, water pollution, scale is continually expanding, this creates a contradiction between supply and demand of fresh water.Therefore, the treatment of water pollution is very urgent and important.9、Toxic waste pollution factors
Growing toxic chemicals not only pose a serious threat to human survival, but also to the ecological environment of the earth's surface will lead to harm.10、Human activities
Since the industrial revolution, human activities widely changed the shape of the earth's surface and the distribution of plants and animals, especially the extensive use of fossil fuels and other ways to discharge a large amount of greenhouse gases into the atmosphere.This makes the original content of greenhouse gases in the atmosphere of increased;Also added some originally not in the atmosphere, has strong greenhouse gases, such as CFCS and HFCS, PFCS [2].With the increase of greenhouse gas concentrations in the atmosphere, atmosphere further hindered the launch of the long wave radiation, the earth into space to keep the radiation balance, will heat up on the ground, in order to enhance longwave radiation.But the surface temperature will not continue to rise, corresponding to the concentration of greenhouse gases, will reach a new equilibrium.Natural Factors
1、The world is in a warm period.2、The earth periodic track changes
The earth periodic track by oval into circular trajectory, distance closer to the sun.According to some scientists study the earth's temperature has a moderate high low temperature alternating, there is a certain regularity.The China meteorological administration, deputy director of the national climate center, said luo according to many scientists predict that in the world in the next 50-100 human will completely into a warming world.Because of the influence of human activity in the 21st century, the concentration of greenhouse gases and sulphate aerosols increase quickly, make the future of the world in 100, east Asia and China's temperature is rising rapidly, the global average surface temperature to rise 1.4 ℃ to 5.8 ℃.To 2050, the average temperatures would rise by 2.2 ℃.“Frequent rare heavy fog weather since winter is also a sign of warmer winters.” Luo said that the fog weather is due to “warm winter” cause strong cold air is very weak.The reality of global warming is to ring alarm bells around the world, climate warming has the serious influence to human survival and sustainable development of society, it is not only a matter of science, and it is a political, economic, energy and other aspects of the comprehensive problem, the fact that global warming has risen to the height of national security
第三篇:英语全球变暖
Nowadays,we always hear about global warming on TV,in the newspaper and so on.Global warming occurs when heat-trapping gases, such as carbon dioxide, get trapped in the atmosphere, causing the Earth's temperature to rise.The emission of green house gases is believed to be one of the reasons for global warming.The main cause of global warming is human pollution,such as people cut down many trees recently,so trees could not absorb the carbon dioxide as much as possible.The balance of nature and ecological environment has been broken,it has a bad influence on our life.We must take measures to protect our earth.First,human must stop deforesting,and more tree planting.Second,we should save fossil fuels as far as possible,and developing new fuels to take place fossil fuels.Third,reduce,reuse,recycle.Recycling a stack of newspapers only four inches high will save a good sized tree.More importantly, we should form the habit of saving energy in our daily life.We hope the situation will soon change.We cannot wait any longer.Do it.Do it right.Do it right now.
第四篇:全球变暖原因
全球变暖的原因
资料来源:
http:// 新华网综述:随着全球人口的急剧增长、世界经济的高速发展、人类对自然资源的无节制开发和生态环境的日益恶化,自上世纪70年代起,全球气候已明显变暖。但导致全球气候变暖的真正原因是什么?科学家们似乎尚无定论,尽管它对全球经济发展和人类社会活动的影响无疑是巨大的,但对它们的评估务必谨慎,因为这是人类应对全球气候变化决策的依据。
全球变暖的原因众说纷纭
全球变暖致家园告急
据新的科学研究显示,目前地球正变得越来越热的原因是,太阳辐射处于近一千年来最强烈的时期。著名的马克斯·普朗克太阳能系统研究所的负责人萨米·索兰基博士认为:“这一点现在可能影响到了全球温度。”
索兰基博士说,强烈的太阳辐射,以及高水平的温室气体,这两个因素共同导致了地球温度的变化,但他说不准哪个因素对全球变暖的影响更大一些。
在过去几十年中,大多数科学家都同意温室气体效应导致了全球变暖,但对太阳辐射增强是否也是全球变暖的一个因素存疑。
为了确定太阳对全球变暖的影响,索兰基博士的研究组对太阳耀斑进行了测量。他们还分析了过去几百年的太阳耀斑数据,终于发现:太阳耀斑较少的年份,往往对应于地球的一个低温期—这一时期可能长达50年 — 但上世纪,太阳耀斑的数量明显增多,地球的温度也稳定上升。
但索兰基博士不知道是什么原因引起太阳辐射增强,也不知道这一过程将持续多长时间。他说,过去20年中太阳辐射的增强还不足以引起地球上所发生的气候变化,他相信,太阳辐射增强对臭氧层和云层的影响给气候带来的变化可能比太阳光本身造成的影响更大。
瑞士皇家气象学会成员、气候学家比尔·伯罗斯博士对索兰基博士的研究成果表示赞赏。他说:“这一研究显然是非常有价值的。它表明值得对太阳进行进一步的研究。在我们还没有确信人类活动是造成气候变化的主要原因之前,我们也许把太多的注意力放在了人类活动对气候的影响上。”
不过,英国气象局的气候研究员加雷思·琼思博士说:“太阳辐射可能的确对气候变化造成了影响,但这一因素需要与其他因素结合起来看。”
对全球气候变暖的评估被夸大了
据美国航空航天局(NASA)的研究发现,过去的某些气候预测夸大了对全球气候变暖这一现象的评估。该局的模拟研究发现,过去人们对地球气温升高进入地球大气层的水蒸气的数量估计过高。
许多科学家们信奉的理论认为,由于人类活动产生的大量二氧化碳等温室气体迅速增多,地球气候不断变暖,海洋中的更多水分被蒸发到大气层中。NASA指出,温室效应是否存在、其影响范围究竟有多大等问题,不同的科学家仍持有不同的
看法。上述最新研究结果表明,大气层中的水蒸气数量的确比以前增多了,但远没有气候预测计算机所说的那样神乎其神。
NASA的科学家德斯勒表示,科学的责任之一,就是对未来的气候做出比较准确的预测,因为这种预测是决策者们制定政策的依据。
我国气象学家王明星也认为:对于气候变化的影响的评价问题很多、很复杂。这首先表现为到目前为止,还没有形成统一的客观的科学评价体系。气候变化的影响是多方面的,“影响评价”的尺度标准是十分复杂而难以定量的。当前研究较多的是对农业生产,森林和其它生态系统的影响。研究结果基本上都是定性的描述,而且,有些定量结果也都是很粗的估计值。
王明星说,关于气候变化影响评价的不确定性的另一原因,是所依据的气候变化预测结果的极不确定性。关于未来气候变化预测结果中只有全球平均地表温度一项是可以接受的。关于气温变化的空间分布,降水变化及气候极端事件的预测都是很不确定的。
然而,对于气候变化的影响评价来说,恰恰需要各地区的气温变化,降水变化,气候极端事件变化等。人们不难理解,对于气温很高降水丰富的热带和亚热带地区,气温上升1-2度对农业和其它生态系统的影响可能并不明显,而对于气温偏低,降水相对较多的冷温带地区,气温上升对农业和生态系统的影响总体上反而是有利的;而对于气温适中,降水相对偏少的暖带大多数地区,气候变化的影响显然主要取决于降水的变化,在这些地区如果气温上升,伴随着较大幅度的降水增加,则气候变化对农业和其它生态系统显然是有利的。相反,气温上升降水不增加甚至减少,气候变化对农业和其它生态系统将造成灾难性结果。
全球气候变化的“周期性”说
在美国旧金山举行的2004年美国地球物理学会的年会上,美国冰河学家朗尼·汤普森声称,他通过对许多气象记录中的一些标志性数据的研究表明:大约在5200年前,地球的气候突然发生了变化,而这种变化今天似乎又在重复出现。
汤普森在他的研究报道中列举了一系列有趣的实例:1991年,在阿尔卑斯冰川,登山者在融化的冰川中发现了一个保存完好的男子尸体。之后的测试结果显示,这个被实验室人员称作“奥兹(Oetzi)”的男子大约是在5200年前被困于此的。
来自爱尔兰和英国的一项横跨了7000年历史的树年轮研究表明,大约在5200年前,树年轮是最密集的,这表明了那些树所经历的最干旱时期也大约是在5200年前。
借助氧的两种同位素,汤普森还引用了非洲乞力马扎罗山顶的冰原释放速度的冰核记录。这些记录能够显示降雪时大气的温度。记录表明,在距今5200年前温度是最低的。
此外,汤普森还列举了撒哈拉沙漠从一个可居住的地区到一个荒芜的沙漠的
变化、在南美的湖床中心发现的植物花粉的重大变化、以及在格陵兰和北极从冰核中释放的甲烷的最低的水平记录,所有的一切都发生在同一时间,5200年前。
汤普森说,所有的这些证据都清楚地指向历史上的这一时间,以及发生的某个事件,这同样也指出类似的变化可能正在今天的气候中发生。
汤普森相信,5200年前的变化可能是由于到达地球的太阳能量剧烈波动引起的。科学家们已经知道了历史上曾经存在一个全球冷却期,在公元1450年到1850年之间,并把那个时期称为“小冰期”,与太阳活动减弱的两个时期重合。
证据显示,大约在5200年前,太阳能量输出首先出现急剧下降,然后在一小段时间内上升。汤普森认为,正是这种巨大的能量振动引发了他本人在所有记录中看到的气候变化。
汤普森指出,天气系统对自然界的变化十分敏感。同样地,它对于人类活动带来的影响也同样敏感,比如温室气体的增加、土地利用政策的变化和对于不可再生能源的依赖,都会给天气系统造成影响。
为此,汤普森强调指出:“我们还没有能够完全了解天气系统的复杂性。正因为我们不懂,我们就应当非常谨慎地评估。”
(来源:新华网综合)
第五篇:全球变暖 观后感
《难以忽视的真相》观后感
农经1班
刘恬园
今天,老师组织我们看《难以忽视的真相》这部电影,我开始对这部电影很好奇,看过之后,我才深深感受到温室效应所带给我们的危害,这是我之前从未思考过的,冰川融化,动物失去了它们的家园,濒临灭绝;而带给我们不断地自然灾害,干旱,洪涝和飓风等自然灾害,在灾难中,给人类带来精神压力和财产损失,一次次袭击着我们,考验着我们;在某些地方,还可能发生不知名的物质运动,我们应该予以注意。现在,我们应该学会如何去预防这些灾难的发生。
原来,我总是认为全球变暖就是单纯的各地温度的升高,在看完影片后,我认识到了全球变暖所带给我们的危害,北极熊即将没有栖息地,人类也将失去他们美好的地球家园,在数据的分析统计下,我们应该引起重视,重视全球变暖对我们的日常生活的变化,不要等有朝一日,我们的生态环境变得不好时,才让我们后悔莫及,我们应该呼吁更多的人来了解温室效应,了解全球变暖,知道它们所即将带来的灾难,我们每个人都是地球的一份子,每个人都应该为地球的美丽与健康做出一份贡献,地球是我们赖以生存的家园,我们祖祖辈辈生活在这里,让我们共同来保护它——地球。全球变暖是由于二氧化碳排放过多引发温室效应而造成的,在我们日常生活中,我们可能观察生活环境变化的不大,并没有影响我们的日常生活,但殊不知,在地球的某一端,生态环境却在发生着巨大的变化,全球变暖,是多么可怕的事情呀,如果人类再不引起重视和实施防护措施,也许,在不远的将来,地球只剩人类这个唯一生存的生物,试想,我们能生存下去吗?
在如今这个快节奏的21世纪,科技越来越发达,人们的生活变得方便快捷,在享受科技带给我们的便捷的同时,又有谁在想着科技也同样带给我们一系列的生态问题,这就是人类改造自然的结果吗?一草一木并不会说些什么,但在不远的将来,一系列的生态问题又有谁来解决呢?在现如今这个社会,为了利益与金钱,不惜牺牲生态环境来赚得利润的人太多太多,我们应该呼吁倡导节能减排,让每个人了解生态危害,防治生态污染的发生,这是我们每个人都应尽的一份责任,大家不需要尽多大的力量去做,从身边的一点一滴小事做起,种植植物,少开私家车,多乘坐公共交通工具,这样的小事,既环保又能锻炼身体,何乐而不为呢,我们都应该行动起来,传递保护生态环境的正能量,为了地球家园,让我们都行动起来吧!为了更好的生活环境而努力,控制二氧化碳,保护我们的家园,创造更优的生活环境,给地球的每个人一个整洁的蓝色地球。
在不少大城市中,环境污染已经成为当前面临的一大关键问题,环境污染,生态破坏,这些不断的发生在我们身边的每一处,随处可见的白色污染,地上充斥着刚刚吐完的痰迹,路人刚刚扔给的包装袋,远处烟囱中刚刚排放出的污染物,这些生活中的事例还有许多许多,难道不足以引起我们的重视吗?善待我们的家园,善待我们的地球,共创一个美好的生活环境。与此同时,大气环境正在一步步恶化,未来气候还会变暖,变暖的停滞现象可能还会持续一二十年,甚至还要更短的时间,中国处于经济快速发展的阶段,煤,石油,天然气,各种能源的使用,排放的二氧化碳增多。导致全球地表平均温度增高了0.85度,其中北半球高于南半球,冬半年升温高于夏半年,在过去的130年来全球升温0.85度,全球变暖体现在全球气温升高,海洋变暖,冰雪大范围融化,海平面持续上升等各个方面,人类对气候系统的影响越来越明显;人类对气候的干扰越大,人类所面临的风险就越高;人类可以采取更多的措施限制减缓气候变化,建立一个更加繁荣可持续的未来。人类对气候系统的影响非常明显,人类活动排放的温室气体指标目前达到史上最高水平。最近气候变化对自然系统的状况造成了强烈影响,气候变暖已不容置疑。如果未来不采取必要措施减少二氧化碳排放,那么变暖现象完全有可能持续,而21世纪末以前可能会导致出现“严重且不可逆转的后果”。我们都不希望地球是这样的,人类面对地球生态环境快速恶化的风险,每个人必须尽快行动,降低温室气体排放,否则将引发生态和社会灾难。
北京这座大城市,已经受到了大气的污染,雾霾的一次次来袭,让一个个北京人已经深受其害,雾霾多发是否和全球气候变暖有关?答案是肯定的,全球气候变暖一定程度上加剧了雾霾多发。雾霾的危害或在10年至20年集中显现,全球变暖所带来的暖冬使得冷空气活动减弱,不利于污染物的扩散,使得雾霾不断来袭,污染着大气,气象条件是“帮凶”,大气污染才是“主凶”。立即行动起来,减少二氧化碳的大量排放,让灰蒙的天空早日重现清澈的蓝天。各地都开始实施预防的措施,实行单双号限制,燃煤改为天然气或热力来减少煤的排放量,加油站油气回收治理,公交车和出租车实行电力运行,在一定程度上减少了二氧化碳的排放,但这需要大家每一个人共同坚持,共同保护这一片蓝天。当大街上每个人都戴着口罩,周围一片灰蒙蒙的天空时,你应该行动起来,从身边的每件节能减排的小事做起,地球不是我们一个人的,是每个人的,我们都应让我们的地球家园变成蓝色港湾,让我们都行动起来!