【正文】 e the science fiction films, involving the advanced digital video effects and many horrible and disastrous scenes to demonstrate the power of the nature and to make people worry about the future of environment and human beings’ existence and , the plots of these two movies are similar to each Day after Tomorrow mainly tells us that Jack Hall, who is the climatologist, predicts that global warming will lead to a new ice age and he issues a warning at a New Delhi conference, hoping the American vicepresident can take measures to deal with , the vicepresident refuses to listen to Jack and he doesn’t believe that prediction will e long, some abnormal phenomena happen in man , the scary disaster es much faster than Jack has imagined , tornados, floods, the snow, and the hailstones attack many the president starts to pay attention to Jack’ suggestion and decides to evacuate residents of the north so as to save people as soon as the center of the story, Jack tries to save the world from the effects of global warming while he promises to save his son, Sam, who is trapped in New , Jack succeeds in rescuing his son through many 2012, the main character, Jackson, a writer in Los Angeles, who works as a driver for the Russian billionaire Yuri, accidentally finds the big secret that the heads of government officials choose 400000 people to get on gigantic arks in order to ensure the continuity of human life when the world Jackson rents a private plane, and escapes from the disaster of destruction with his exwife, his son, daughter and his xwife’ boyfriend, center of plot mainly tells us the process of his adventurous journey to get on gigantic , a small percentage of humans survive from the , these two movies show us the unusual trips and feasts for eyes and ears, which make us experience some moving scenes and learn some meaningful can experience the warmth of the brilliant humanity of people from these two The brilliance of the deeply is the film’s principle and eternal theme, so do these two disastrous these two films show us the terrifying scenes during the disaster, we still see the earnest and deeply love anywhere, such as the love between parents and kids, the love between the lovers, the love between the doctor and the little cancer patient, the love between dogs and the love between the beautiful loves fill in the films and make us deeply these two films, what impresses me is the love between Jack and his son, Sam, and the love between Jackson and his kids, Noah and and Jackson are busy in working and have no time in acpanying with their sons, so Sam and Noah misunderstand that their father don’t care about , their fathers really love them all the Sam is trapped in New York, Jack determines to go from Washington New York to rescue Sam through the ice 2012 when the disaster happens, Jackson tries his best to save his son and daughter。等到新仙女木冰期結(jié)束時候，人類進入了文明時代。新仙女木冰期大約持續(xù)了1000~1300年，約在公元前9500年結(jié)束。至于農(nóng)業(yè)的發(fā)明并沒有一般想象的那么困難，很有可能早期的狩獵/采集者發(fā)現(xiàn)，如果把自己吃剩下的果實留下一些扔到地里，第二年再來的時候同一個地方就會有豐富的食物；重復(fù)幾次，農(nóng)業(yè)就誕生了。當(dāng)然，人類也會適應(yīng)。當(dāng)冰期來臨時，雪線和林線會下移和南移；大量淡水被鎖在高緯度地區(qū)的冰雪中，低緯度地區(qū)的降水會劇減，這都會極大干擾人類的生活。從9月到次年5月，暴風(fēng)雪幾乎從不間斷。在新仙女木冰期，氣溫接近于末次盛冰期。一旦墨西哥灣暖流終止，西北歐地區(qū)氣溫就會降到同緯度其他地區(qū)加拿大北部和西伯利亞的水平，冰川會在挪威、瑞典、芬蘭和蘇格蘭等地開始發(fā)育，潔白的冰雪會把更多的太陽輻射反射回太空，減少地球所能獲得的熱量，進一步降低氣溫；氣溫降低又會促進冰川的發(fā)育，如此反復(fù)。而北大西洋高緯度地區(qū)海洋表面的海水之所以下沉，是因為其溫度、鹽度造成其密度較大；如果其溫度高一些，或者鹽度淡一些，則其密度就要降低；如果其溫度足夠高或者鹽度足夠淡，其密度可能就不足以大到下沉所需的密度，從而終止墨西哥灣暖流乃至全球海洋熱鹽環(huán)流。墨西哥灣暖流之所以能不中斷，就在于北大西洋高緯度地區(qū)海洋表面的海水因為下沉、流走，把加勒比海地區(qū)的溫水“拉”了過來；如果北大西洋高緯度地區(qū)的海水不下沉，就沒有給加勒比海的溫水的空間。墨西哥灣暖流在向北流去的過程中，不斷與空氣進行熱交換，水溫降低；同時，因為墨西哥灣暖流在海洋表面進行，所以水分會不