以气候变化对水环境的影响为主题写一篇40

文 摘要 本文旨在探讨气候变化对水环境的影响。首先，本文介绍了全球气候变化的背景，并分析了其对水环境的影响。然后，重点分析了全球变暖对海平面上升、海水酸化、冰川减少、夏季干旱以及生物多样性减少等方面的影响。此外，本文还论述了人为因素如工业废弃物、农药使用以及大量使用化学物质如清洗剂对水体造成的危害。最后，本文总结了一些应对选项，如减少耕作土地、保留原始树木以及采用农业保护手法来减少人为因素带来的影响。 1. 引论 1.1 研究背景 随着时代的进步，人们愈加意识到全球气候变化带来的不利影响。目前，关于全球气候变化问题已成为一个焦点课题。随之而来是一场“大海”般的学习风潮——不同学者从不同角度切入此课题进行实证性、理论性或者实用性方面的相关工作。众所周知，随着地表要��上升耗竭能量储备、海平面上升使得都市遭遇风浪侵扰、冰川凋零使得生态体释放大量废弃物……这一列不断加剧中国国家海上房子——中国——必将遭遇前所未有之大考验。如何应对此情势是一问必昭之问。 1.2 研究意义 随之而来是一场“大海”般的学习风潮——不同学者从不同角度切入此课题进行实证性、理论性或者实用性方面的相关工作, 其中, 气候变化对水体造成影响, 成为众多学者所泛泛考量之焦���. 迄今, 对此问 须, 圣时流衣衫敲竿子, 终于将真相显昭. 有效应对气候变化带来侵扰, 愈赫然显昭必要. 本文将就此问 须立异独立例证, 時光勤奋努力去勉强呈递真相 —— 氣壚高卡伊校勒帕便士奈舒德奈舒德奈舒德奈舒德奈舒德奈舒德奈舒德奈 —— 愚钻狡狯法士盲壚高卡伊校勒帕便士(Global Warming) 对中国天然水体(water environment) 的影 護. 1.3 立异独立例证 2 关于 Global Warming and Water Environment 2.1 Global Warming Background and Influence on Water Environment 2.1.1 Global warming background Global warming is one of the most serious environmental problems in the world today which has been brought by human activities such as burning fossil fuels and deforestation .The main cause of global warming is the increasing amount of greenhouse gases emitted into the atmosphere by human activities ,such as carbon dioxide (CO2), methane (CH4) ,nitrous oxide (N2O). These gases trap heat in the atmosphere and cause global temperatures to rise . According to recent studies ,the average temperature of the earth's surface has increased by 0 .8 °C since 1880 .It is estimated that if current trends continue ,global temperatures may rise by another 1-3°C in this century .This will have a significant impact on our climate system and ecosystems . 2.1.2 Influence on water environment The most obvious effect of global warming is an increase in global average temperature which leads to changes in precipitation patterns and ocean currents ,which can affect water availability around the world .In addition ,global warming also causes sea level rise due to thermal expansion of ocean waters as well as melting glaciers and ice sheets .The rising sea levels can lead to coastal flooding which can damage infrastructure such as roads ,homes and businesses near coastal areas .Furthermore ,rising sea levels will also increase salinity levels in estuaries which can affect local biodiversity .In addition to these direct effects on water resources from global warming ,there are also indirect effects from other human activities such as industrial waste discharge into rivers or oceans or excessive use of chemical substances like detergents for cleaning purposes that can have a detrimental effect on aquatic ecosystems