Nitro­gen ex­per­i­ment among break­throughs

China Daily (USA) - - TOP NEWS - By ZHAO XINYING zhaoxiny­ing@chi­

The voy­age taken by the re­search ship Tan Suo Yi Hao to the Mar­i­anas Trench from late June un­til Aug 12 made a se­ries of break­throughs in deep-sea sci­en­tific exploration, both do­mes­ti­cally and in­ter­na­tion­ally, ac­cord­ing to sci­en­tists from the Chi­nese Academy of Sciences.

The break­throughs in­clude a suc­cess­ful nitro­gen cy­cle ex­per­i­ment con­ducted by the Yuan­wei Shiyan (“on-site ex­per­i­ment”) deep-sea el­e­va­tor, a re­search de­vice that is low­ered with an an­chor and was de­vel­oped by the In­sti­tute of Deep-Sea Science and Engi­neer­ing of CAS.

“It made his­tory among sim­i­lar de­vices in­ter­na­tion­ally,” said Li­uXincheng, the CAS sci­en­tist who headed the ex­pe­di­tion.

Ac­cord­ing to Liu, the Tianya deep-sea lan­der, an­other de­vice taken on the voy­age, also made his­tory. It col­lected deep-sea wa­ter sam­ples of more than 100 liters for the first time — more than coun­ter­parts from other coun­tries.

Dur­ing the voy­age, China’s un­manned sub­mersible, the Haidou, dived for the first time to a depth of more than 10,000 me­ters, reach­ing 10,767 me­ters.

Jiao­long, China's manned sub­mersible, reached a depth of 7,062 me­ters in theMar­i­anas Trench in June 2012.

Bai Chunli, pres­i­dent of CAS, said the break­throughs are part of China’s exploration of the sea at a depth of 10,000 me­ters, which is among the key projects of the coun­try’s 13th Five Year Plan (2016-20).

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