Chinese Journal of Polar Research

ADVANCES IN POLAR SCIENCE ›› 2007, Vol. 18 ›› Issue (1-English): 8-17.

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Analyses of structure of planetary boundary layer in ice camp over Arctic ocean

 Bian Lingen1, Lu Longhua1, Zhang Zhanhai2, Cheng Bin3 and Lu Changgui1   

  1. 1 Chinese Academy of Meteorological Sciences, Beijing 100081, China;
    2 Polar Research Institute of China, Shanghai 200136, China;
    3 Finish Institute of Marine Research, Helsinki FIN-00931, Finland
  • Online:1957-03-30 Published:1957-03-30
  • Contact: Bian Lingen

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Abstract:

The vertical structure of Planetary boundary layer over Arctic floating ice is presented by using about 50 atmospheric profiles and relevant data sounded at an ice station over Arctic Ocean from 22 August to 3 September, 2003. It shows that the height of the convective boundary layer in day is greater than that of the stability boundary layer in night.The boundary layer can be described as vertical structures of stability,instability and multipling The interaction between relative warm and wet down draft air from up level and cool air of surface layer is significant,which causes stronger wind shear, temperature and humidity inversion with typical wind shear of 10 m/s/100 m, intensity of temperature inversion of 8 ℃/100 m. While the larger pack ice is broken by such process, new ice free area in the high latitudes of arctic ocean. The interactions between air/ice/water are enhanced. The fact helps to understanding characteristics of atmospheric boundary layer and its effect in Arctic floating ice region.

Key words: Arctic Ocean, atmospheric profile sounding, boundary layer structure