亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线

 

Scientists to complete land map of Antarctica

0 CommentsPrint E-mail Xinhua, October 27, 2009
Adjust font size:

Scientists from China's 26th Antarctic expedition are expected to complete the world's first land cover map of Antarctica at the end of this year.

It will be the most accurate map of the continent, presenting various land features, they said aboard the icebreaker Xuelong.

The research team will collect a wide range of field spectral data to create the map.

The map, with the application of high resolution remote sensing technology, will for the first time in the history show the distribution of key features on the continent, including sea ice, snow, blue ice, rocks, soil marshes, lakes and ice crevices.

Remote sensing technology is one of the most effective ways of mapping. It has been widely used in China's polar expeditions during the past decade and has made great contributions to Antarctic studies in the fields of mapping, biology research and communication.

High precision

The map is also based on 1,073 remote sensing images acquired from the United States satellite Landsat that were taken mainly during the austral summer from 1999 to 2002, Cheng Xiao, deputy dean of the College of Global Change and Earth System Science, Beijing Normal University, said via e-mail.

"The precision of the map is 15 meters, about 20 times more than former Antarctic maps made by other countries," Cheng said. "It will greatly advance our geographic knowledge of Antarctica."

The map will provide not only more accurate ground parameters for scientists to forecast global change or global warming with climate system models, but also important data for detection on changes of Antarctica land cover in a long run, Cheng said.

The 26th expedition team began its journey on October 11 from Shanghai. Xuelong reached Australia's Coral Sea on Sunday.

Print E-mail Bookmark and Share

Comments

No comments.

Add your comments...

  • Your Name Required
  • Your Comment
  • Comments are moderated and generally will be posted if they are on-topic and not abusive.
Send your storiesGet more from China.org.cnMobileRSSNewsletter
    1. <ul id="556nl"><kbd id="556nl"><form id="556nl"></form></kbd></ul>
      <thead id="556nl"></thead>

      1. <em id="556nl"><tt id="556nl"></tt></em>
        <ul id="556nl"><kbd id="556nl"><form id="556nl"></form></kbd></ul>

        <ul id="556nl"><small id="556nl"></small></ul>
        1. <thead id="556nl"></thead>

          亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线 人妻无码久久影视 日韩久久久久久久久久久久 精品国产香蕉伊思人在线 无码国产手机在线a√片无灬 91在线视频无码