高三完形填空Two key climate change indicators global surface
时间:2016-12-24 13:57 作者:admin 来源:www.2abc8.com
Two key climate change indicators — global surface temperatures and Arctic sea ice extent — have broken numerous records through the first half of 2016, according to NASA analyses of ground-based observations and satellite data. Each of the first six months of 2016 set a record as the warmest (41) month globally in the modern temperature record, which (42) 1880, according to scientists at NASA's Goddard Institute for Space Studies (GISS) in New York. The six-month period from January to June was also the planet's warmest half-year on record, with a(n) (43) temperature 1.3 degrees Celsius (2.4 degrees Fahrenheit) warmer than the late nineteenth century.
Five of the first six months of 2016 also (44) the smallest respective monthly Arctic sea ice (45) since regular satellite records began in 1979, according to analyses developed by scientists at NASA's Goddard Space Flight Center, in Greenbelt, Maryland. The one (46)_____, March, recorded the second smallest for that month.
(47) these two key climate indicators have broken records in 2016, NASA scientists said it is more significant that global temperature and Arctic sea ice are continuing their decades-long trends of change. Both trends are ultimately driven by rising (48) of heat-trapping carbon dioxide and other greenhouse gases in the atmosphere.
The extent of Arctic sea ice at the peak of the summer melt season now typically (49) 40 percent less area than it did in the late 1970s and early 1980s. Arctic sea ice extent in September, the seasonal low point in the annual cycle, has been (50) at a rate of 13.4 percent per decade.
"While the El Nino event in the tropical Pacific this winter (51) the gaining global temperatures from October, it is the basic trend which is producing these record numbers," GISS Director Gavin Schmidt said.
(52) El Nino events have driven temperatures to what were then record levels, such as in 1998. But in 2016, even as the effects of the recent El Nino wear off, global temperatures have risen well beyond those of 18 years ago (53) the overall warming that has taken place in that time.
The global trend in rising temperatures falls behind the regional (54) in the Arctic, said Walt Meier, a sea ice scientist at NASA Goddard.
"It has been a record year so far for global temperatures, but the record high temperatures in the Arctic over the past six months have been even more extreme," Meier said. "This warmth as well as unusual weather (55) have led to the record low sea ice extents so far this year."
41. A. resistant B. respective C. resolved D. remote
42. A. makes sense of B. keeps up with C. dates back to D. goes ahead of
43. A. average B. ordinary C. common D. temporary
44. A. confirmed B. witnessed C. involved D. conducted
45. A. standard B. content C. amount D. extent
46. A. datum B. example C. month D. exception
47. A. While B. When C. After D. As
48. A. combinations B. reductions C. concentrations D. applications
49. A. includes B. covers C. approaches D. indicates
50. A. increasing B. changing C. declining D. moving
51. A. ended up with B. gave rise to C. broke away from D. resulted from
52. A. Frequent B. Natural C. Disastrous D. Previous
53. A. in return for B. in case of C. in spite of D. because of
54. A. warming B. falling C. gathering D. changing
55. A. forecasts B. varieties C. patterns D. illustrations
答案 41-45： BCABD 46-50： DACBC 51-55： BDDAC
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