首页
登录
职称英语
The climate of Earth is changing. Climatologists are confident that over the
The climate of Earth is changing. Climatologists are confident that over the
游客
2025-04-19
41
管理
问题
The climate of Earth is changing. Climatologists are confident that over the past century, the global average surface temperature has increased by about half a degree Celsius. This warming is thought to be at least partly the result of human activities, such as the burning of fossil fuels and the clearing of forests for agriculture. As the global population grows and national economies expand, the global average temperature is expected to continue increasing by an additional 1.0 to 3.5°C by the year 2100.
Climate change is one of the most important environmental issues facing humankind. Understanding the potential impacts of climate change for natural ecosystems is essential if we are going to manage our environment to minimize the negative consequences of climate change and maximize the opportunities that it may offer. Because natural ecosystems are complex, nonlinear systems, it follows that their responses to climate change are likely to be complex. Climate change may affect natural ecosystems in a variety of ways. In the short term, climate change can alter the mix of plant species in land ecosystems such as grasslands. In the long term, climate change has the potential to dramatically alter the geographic distribution of major vegetation types — savannas, forests, and tundra. Climate change can also potentially alter global ecosystem processes, including the cycling of carbon, nitrogen, phosphorus, and sulfur. Moreover, changes in these ecosystem processes can affect and be affected by changes in the plant species of the ecosystem and vegetation type. All of the climate change-induced alterations of natural ecosystems affect the services that these ecosystems provide to humans.
The global average surface temperature increase of half a degree Celsius observed over the past century has been in part due to differential changes in daily maximum and minimum temperatures, resulting in a narrowing of the diurnal temperature range. Decreases in the diurnal temperature range were first identified in the United States, where large-area trends showed that maximum temperatures have remained constant or increased only slightly, whereas minimum temperatures have increased at a faster rate. In this issue, Alward’s report on the different sensitivities of rangeland plants to minimum temperatures increases. [br] According to the author, what may chiefly be responsible for the temperature increases observed over the past century?
选项
A、Increases of daily maximum temperatures.
B、Decreases of daily minimum temperatures.
C、Increases of diurnal temperature range.
D、Decreases in the diurnal temperature range.
答案
D
解析
本题的四个选项中,只有D项为正确答案。这可从文中第三段的内容推知,即上个世纪,每日最高、最低气温的范围缩小是造成全球平均表面气温上升0.5度的部分因素。
转载请注明原文地址:http://tihaiku.com/zcyy/4044698.html
相关试题推荐
Thepoliceinspector,havingreceivednewinformationfromaconfidentialsource
Itisstrictly_____thataccesstoconfidentialdocumentsisdeniedtoallbuta
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
InthePacificNorthwest,asclimateandtopographyvary,sodothespeciesthat
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthe
随机试题
[originaltext]M:HappyAnniversary!W:Oh,thankyou.Theflowersarebea
Whichofthefollowingsentencesexpressesprobability?A、Hemusthavepickedup
HowlongdidthespeakerstayinHollywoodlastChristmas?Shestayedtherefor_
A.知母B.栀子C.淡竹叶D.天花粉E.夏枯草能清热生津,消肿排脓的药物是()
下列各项,不属于筹资活动产生的现金流量的是()。A.支付职工薪酬的现金 B
在转换阶段,社会工作者所扮演的角色包括()。A.领导者 B.决策者 C.协助
时时眩晕,面白神疲,大便溏薄,小腹坠胀,舌质淡,脉细弱者,治法宜选 A.补脾益
甲与乙投宿同一旅店时,甲得知乙身携巨款,于是甲利用聊天机会在乙的茶杯中偷放安眠药
关于项目社会评价中利益相关者的说法,正确的是()。A.利益相关者是指与项目有直
根据《建筑起重机械安全监督管理规定》,建筑起重机械安装完毕后,由()组织验收。
最新回复
(
0
)