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
Soot(煤烟灰)and Snow: a Hot Combination New research from NASA scientists suggests emissions of black soot after the way sunlig
Soot(煤烟灰)and Snow: a Hot Combination New research from NASA scientists suggests emissions of black soot after the way sunlig
admin
2015-08-05
60
问题
Soot(煤烟灰)and Snow: a Hot Combination
New research from NASA scientists suggests emissions of black soot after the way sunlight reflects off snow. According to a computer simulation, black soot may be responsible for 25 percent of observed global warming over the past century.
Soot in the higher latitudes(维度)of the Earth, where ice is more common, absorbs more of the sun’s energy and warmth than an icy, white background. Dark-colored black carbon, or soot, absorbs sunlight, while lighter colored ice reflects sunlight.
Soot in areas with snow and ice may play an important role in climate change. Also, if snow and ice covered areas begin melting, the warming effect increase, as the soot becomes more concentrated on the snow surface. "This provides a positive feedback, as glaciers and ice sheets melt, they tend to get even dirtier. " said Dr. James Hansen, a researcher at NASA’s Goddard Institute for Space Studies, New York.
Hansen found soot’s effect on snow albedo(反照率), which may be contributing to trends toward early springs in the Northern Hemisphere, such as thinning Arctic sea ice and melting glaciers permafrost. Soot also is believed to play a role in changes in the atmosphere above the oceans and land.
" Black carbon reduces the amount of energy reflected by snow back into space, thus heating the snow surface more than if there were no black carbon, " Hansen said. Soot’s increased absorption of solar energy is especially effective in warming the world’s climate. "This forcing is unusually effective, causing twice as much global warming as a carbon-dioxide forcing of the same magnitude. " Hansen noted.
Hansen cautioned, although the role of soot in altering global climate is substantial, it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past century. Such gases are expected to be the largest climate forcing for the rest of the century.
The researchers found that observed warming in the Northern Hemisphere was large in the winter and spring at middle and high latitudes. These observations were coherent with the researchers’ climate model situations, which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight.
Which of the following areas shows a greater warming effect?
选项
A、Ice sea areas.
B、Areas with black carbon.
C、Areas covered with white snow.
D、Melting glaciers.
答案
B
解析
根据第五段首句“Black caebon reduces the amount of energy reflected by snow back in一to space,thus heating the snow surface more than if there were no black carbon, ”可知,黑炭覆盖的地区有更强烈的加热效果。故本题选B。
转载请注明原文地址:https://kaotiyun.com/show/sxQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
From1994to1998thenumberofAmericanswhohaddonatedakidneyreached244.Peoplewithheartdisease,diabetesandhighbl
Angiogenesisfactorisasubstancethatcanpromoterapidhealingofwounds.Scientistsbelievethatifsomedayantibodiesagai
The"fourthweapon"curescancerby______.Beforehetiredthedrug-vaccinecombination,Mr.Parkerwaskeptalivethrough_____
Hestretchedthenetfromonesideoftherivertotheothersothatithungdownintothewater.
HitchhikingWhenIwasinmyteens(十几岁)and20s,hitchhikingwasamainformoflong-distancetransport.Thekindnessorcu
MoreAboutAlzheimer’sDiseaseScientistshavedevelopedskinteststhatmaybeusedinthefuturetoidentifypeoplewith
CanLoudMusicCauseHearingImpairment(损伤)?Haveyouevergonetoaconcertandrealizedthatyourseatswererightnextto
Hewaskeptinappallingconditionsinprison.
FinancialRisksSeveraltypesoffinancialriskareencounteredininternationalmarketing;themajorproblemsincludecommercia
随机试题
开环控制系统是指组成系统的控制装置与被控制对象之间只有反向作用而没有顺向联系的控制。()
A有限责任公司2011年发生的有关经济业务如下:(1)按照规定办理增资手续后,将资本公积90000元转增注册资本。该公司原有注册资本2910000元,其中甲、乙、丙三家公司各占1/3。(2)用盈余公积50000元弥补以前年度亏损。(3)从税后利润中提
食物在生态系统各成分间的消耗、转移和________过程就是能量的流通过程。
脊柱损伤伤员的正确搬运方法是
血清脂蛋白电泳可分α-脂蛋白、前β-脂蛋白、β-脂蛋白及CM四个条带,α-脂蛋白中所含的载脂蛋白是
某低压配电系统,接地形式为TN—S,各段线路计算电流(Ic)、接地故障电流(Id)值如下图所示,采用30kW额定电流IM=58.6A的笼型电动机,直接启动,启动电流Ist,M=410.2A,电动机末端回路选用aM型电动机保护用熔断器,上级配电干线用gG型熔
建立下表科目,并装入期初余额
()是由一组规则、一批组织和一系列产权所有者构成的一套市场机制。
TheTourismDepartment【K7】______aculturalexhibitattheKosanHallaspartofBhutan’sCulturalMonthcelebration.Theexhibit
WhichofthefollowingisNOTthepurposeofAmerica’scentralbank?
最新回复
(
0
)