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  3. Scientists are actively investigating the feedback mechanism within the phys

Scientists are actively investigating the feedback mechanism within the phys

游客2024-01-03  50
问题     Scientists are actively investigating the feedback mechanism within the physical, chemical, and biological components of Earth’s climate system in order to make accurate predictions of the effects the rise in greenhouse gases will have on future global climates. Global circulation models are important tools in this process. These models incorporate current knowledge on atmospheric circulation patterns, ocean currents, the effect of landmasses, and the like to predict climate under changed conditions. There are several models, and all show agreement on a global scale. For example, all models show substantial changes in climate when carbon dioxide concentration is doubled. However, there are significant differences in the regional climates predicted by different models. Most models project greater temperature increases in mid-latitude regions and in mid-continental regions relative to the global average. Additionally, changes in precipitation patterns are predicted, with decreases in mid-latitude regions and increased rainfall in some tropical areas. Finally, most models predict that there will be increased occurrences of extreme events, such as extended periods without rain(drought), extreme heat waves, greater seasonal variation in temperatures, and increases in the frequency and magnitude of severe storms. Plants and animals have strong responses to virtually every aspect of these projected global changes. [br] The word "incorporate" in the passage is closest in meaning to
选项 A、describe
B、include
C、expand
D、present
答案 B
解析
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