Turn off MathJax
Article Contents
Jialiang Zhu, Yilin Liu, Xiaoyu Wang, Tao Li. Optical properties and surface energy flux of spring fast ice in the Arctic[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1828-9
Citation: Jialiang Zhu, Yilin Liu, Xiaoyu Wang, Tao Li. Optical properties and surface energy flux of spring fast ice in the Arctic[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1828-9

Optical properties and surface energy flux of spring fast ice in the Arctic

doi: 10.1007/s13131-021-1828-9
Funds:  The National Major Research High Resolution Sea Ice Model Development Program of China under contract No. 2018YFA0605903; the National Natural Science Foundation of China under contract No. 41776192; the Fundamental Research Funds for the Central Universities under contract No. 202165005.
More Information
  • Corresponding author: E-mail: litaoocean@ouc.edu.cn
  • Received Date: 2020-12-09
  • Accepted Date: 2021-02-19
  • Available Online: 2021-08-16
  • Over the past decades, sea ice in the polar regions has been significantly affecting local and even hemispheric climate through a positive ice albedo feedback mechanism. The role of fast ice, as opposed to drift ice, has not been well-studied due to its relatively small coverage over the earth. In this paper, the optical properties and surface energy balance of land fast ice in spring are studied using in situ observations in Barrow, Alaska. The results show that the albedo of the fast ice varied between 0.57 and 0.85 while the transmittance increased from 1.3×10−3 to 4.1×10−3 during the observation period. Snowfall and air temperature affected the albedo and absorbance of sea ice, but the transmittance had no obvious relationship with precipitation or snow cover. Net solar shortwave radiation contributes to the surface energy balance with a positive 99.2% of the incident flux, with sensible heat flux for the remaining 0.8%. Meanwhile, the ice surface loses energy through the net longwave radiation by 18.7% of the total emission, while the latent heat flux accounts for only 0.1%. Heat conduction is also an important factor in the overall energy budget of sea ice, contributing 81.2% of the energy loss. Results of the radiative transfer model reveal that the spectral transmittance of the fast ice is determined by the thickness of snow and sea ice as well as the amount of inclusions. As major inclusions, the ice biota and particulates have a significant influence on the magnitude and distribution of the spectral transmittance. Based on the radiative transfer model, concentrations of chlorophyll and particulate in the fast ice are estimated at 5.51 mg/m2 and 95.79 g/m2, which are typical values in the spring in Barrow.
  • loading
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (22) PDF downloads(0) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return