首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The mystery of the expansion of sea ice around Antarctica, at the same time as global warming is melting swaths of Arctic sea ic
The mystery of the expansion of sea ice around Antarctica, at the same time as global warming is melting swaths of Arctic sea ic
admin
2014-09-18
36
问题
The mystery of the expansion of sea ice around Antarctica, at the same time as global warming is melting swaths of Arctic sea ice, has been solved using data from US military satellites.
Two decades of measurements show that changing wind patterns around Antarctica have caused a small increase in sea ice, the result of cold winds off the continent blowing ice away from the coastline.
" Until now these changes in ice drift were only speculated upon using computer models, " said Paul Holland at the British Antarctic Survey. "Our study of direct satellite observations shows the complexity of climate change.
" The Arctic is losing sea ice five times faster than the Antarctic is gaining it, so, on average, the Earth is losing sea ice very quickly. There is no inconsistency between our results and global warming. "
The extent of sea ice is of global importance because the bright ice reflects sunlight far more than the ocean, meaning temperature rises still further.
This summer saw a record low in Arctic sea ice since satellite measurements began 30 years ago. Holland said the changing pattern of sea ice at both poles would also affect global ocean circulation, with unknown effects. He noted that while Antarctic sea ice was growing, the Antarctic ice cap—the glacier and snow pack on the continent—was losing mass, with the fresh water flowing into the ocean.
The research on Antarctic sea ice, published in Nature Geoscience, revealed large regional variations. In places where warm winds blowing from the tropics towards Antarctica had become stronger, sea ice was being lost rapidly. "In some areas, such as the Bellingshausen Sea, the sea ice is being lost as fast as in the Arctic, " said Holland.
But in other areas, sea ice was being added as sea water left behind ice being blown away from the coast froze. The net effect is that there has been an extra 17, 000 sq km of sea ice each year since 1978—about a tenth of a percent of the maximum sea ice cover.
Antarctica is a continent surrounded by an ocean, whereas the Arctic is an ocean surrounded by a continent. For that reason, said Holland, sea ice was not able to expand by the same mechanism in the Arctic as at the southern pole, because if winds pushed the ice away from the pole it quickly hit land.
Holland did the research with Ron Kwok at Nasa’s jet propulsion laboratory in California, where maps of sea ice movements were created from more than 5 m individual daily measurements collected over 19 years. The maps showed, for the first time, the long-term changes in sea ice drift around Antarctica.
Kwok said; "The Antarctic sea ice cover interacts with the global climate system very differently than that of the Arctic, and these results highlight the sensitivity of the Antarctic ice coverage to changes in the strength of the winds around the continent. "
Which of the following is NOT true about the maps of sea ice movements?
选项
A、They arc the research results of Holland and Kwok.
B、They were made in a lab located in California.
C、The data for those maps have been collected over 19 years.
D、They show the temporary changes in sea ice drift.
答案
D
解析
细节题。由第十段最后一句可知,这些轨迹图第一次展示出南极周围海冰漂移的长期变化,[D]与文中的意思相反,故为正确答案。[A]“它们是霍兰德和郭的研究成果”、[B]“它们是在位于加利福尼亚州的一所实验室里绘制出来的”和[C]“轨迹图所用的数据已收集了19年多”都可以在本段中找到依据,故均排除。
转载请注明原文地址:https://kaotiyun.com/show/plTK777K
0
专业英语四级
相关试题推荐
Itcostheralotofmoney,butshedoesn’tregret______ayeartravelingaroundtheworld.
Youknowyouhavetoread"betweenthelines"togetthemostoutofanything.Iwanttopersuadeyoutodosomethingequallyim
Youknowyouhavetoread"betweenthelines"togetthemostoutofanything.Iwanttopersuadeyoutodosomethingequallyim
Thegovernmenthaspromisedtodo______liesinitspowertoeasethehardshipsofthevictimsintheflood-strickenarea.[2004
Shortlybeforehediedoflymphoma(淋巴瘤),thegreatwriterandphysicianLewisThomas,whosebooksturnedscienceintoawayofa
Shortlybeforehediedoflymphoma(淋巴瘤),thegreatwriterandphysicianLewisThomas,whosebooksturnedscienceintoawayofa
Moderatedrinkingreducesstrokerisk,studyconfirms.Similartothewayadrinkortwoadayprotectsagainstheartattacks,m
Duringthedebatemyopponentkeptcutting______.
Nomatterhowhardyoutry,youcanfindnoparallelexistingbetweenthem.Theunderlinedpartmeans______.
ThecarindustrysufferedanothersetbackyesterdaywhenLucasElectricalCompanyannouncedthatmanyofits12,000workersat1
随机试题
起重机的安全保护装置包括起重量限制器、起重力矩限制器、极限力矩限制器、起升高度限制器等。下列有关起重机械安全装置的说法中,错误的是()。
氢化物原子荧光法测砷的最低检测质量是()。
最早应用于CT检查的部位是
哮证发作期的主要病机是
除法律规定终局的行政复议外,申请人对行政复议决定不服的,可以在收到复议决定书之日起15日内,或者法律、法规规定的其他期限内向人民法院起诉。对申请人逾期不起诉又不履行复议决定的,按以下方法处理()。
大气含尘浓度属于测试统计数据,不同地区、不同气候大气含尘浓度不同。《教材》给出四类区域的大气含尘浓度供计算选用,大于等于0.5μm粒径粒子的浓度为30×104pc/L,相当于________。
承包、承租人按照合同规定只向发包方、出租人缴纳一定的费用,缴纳承包、承租费后的企业的经营成果归承包、承租人所有的,对其所得征所得税可用()税率。
心理效果事前测定常用的具体方法主要有()。 ①市场试验法②直接测试法 ③组群测试法④仪器测试法 ⑤回函测定法⑥综合测试法
Despiteyourbestintentionsandefforts,itis【B1】______:Atsomepointinyourlife,youwillbewrong.【B2】_______canbehar
Whatwouldyoudoifyoufailed?Manypeoplemaychoosetogiveup.However,thebestwaytosuccessistokeepyourdirectiona
最新回复
(
0
)