关注微信领¥50

百门课程¥0元


50万+已关注

科学美国人60秒:气候变化影响美西南部针叶林-托福听力下载

2016-11-30 10:30:15来源:科学美国人60秒

点击查看>>科学美国人60秒音频:气候变化影响美西南部针叶林

  科学美国人60秒中英文翻译:气候变化影响美西南部针叶林

  科学美国人60秒英文文本

  As you sit round the Christmas tree, consider the TLC you give O Tannenbaum:plenty of water and a relatively comfortable climate.

  Wouldn't want to dry out the tree, after all.

  Now consider that in the house we all live in—the planet—we're hardly giving the same courtesy to your Christmas tree's wild cousins.

  (Who, I might add, are actually still alive.)

  As the planet warms, droughts are getting even drier—and they're getting hotter too.

  In fact it's getting so bad that researchers are now forecasting that conifers in the arid southwestern United States could be completely wiped out by the end of the century.

  No more pinyon pines, ponderosas or junipers. No more forests.

  "It's definitely a distressing result for all of us.

  None of us want to see this happen.

  It's a bummer, honestly."

  Sara Rauscher, a climate scientist and geographer at the University of Delaware.

  She and her colleagues gathered data on how real-world evergreens in the southwest respond to drought and heat—they basically starve, unable to carry on photosynthesis or transport water.

  The researchers then combined those physiological data with a half dozen projections of how climate change might proceed.

  "But no matter what model we used, we always saw tree death."

  Specifically, 72 percent of the trees dead by 2050, and a near-complete annihilation by the year 2100.

  The results are in the journal Nature Climate Change.

  But we'll always have Paris, right?

  "Even if we used a scenario similar to what the Paris accords have agreed upon—so limiting global warming to 2 degrees—we still saw widespread die-off.

  It happened later in the century, but it still happened."

  That said, the study does not account for trees'ability to adapt, or whether new populations could find friendlier climes.

  That is, whether conifers in the southwest can pull up roots fast enough to beat climate change.

  中文翻译请点击下一页

为你特别匹配的托福超值课程,快速提分先人一步!
  • 托福12月公益课(第2期)

    托福12月公益课(第2期)

    特点:1天1节公益课,讲干货有实力,高效备考,快速突破!

    课时:10小时

    查看详情
  • 【活动价】新东方托福名师在线一对一(体验课)

    【活动价】新东方托福名师在线一对一(体验课)

    适合人群:想体验新东方在线致赢托福1对1辅导冲分课程的同学

    体验课时:30分钟

    查看详情
  • 大学生旗舰直达班 (冲110分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数110分!

    课时:343

    查看详情
  • 大学生旗舰直达班 (冲100分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数100分!

    课时:331

    查看详情
  • 大学生旗舰直达班 (冲90分)

    【知心托福】大学生旗舰直达班 (冲90分)

    适合人群:托福目标分数90分!

    课时:310

    查看详情
全部课程>>
单项突破
直播课堂

更多托福课程
新东方25年教学经验沉淀
托福考生必修课
托福考生,高效提分,安心之选

查看详情>>
更多>>
更多课程>>
更多>>
更多内容
更多>>
距结束 : 00 00 00 00

4小时甩掉“Broken English”,直击托福24+

实战经验分享三人成团免费学

口语6大题精讲;16天社群打卡学习&答疑 活动日期 : 2018.11.08-2018.12.13

价格 : ¥69

678人 已报名

查看详情
更多>>
更多公开课>>
更多>>
更多课程>>