A Comparison Study Between Spring and Summer Fogs in the Yellow Sea-Observations and Mechanisms

作者：Zhang Suping^*; Li Man; Meng Xiangui; Fu Gang; Ren Zhaopeng; Gao Shanhong

来源：Pure and Applied Geophysics, 2012, 169(5-6): 1001-1017.

DOI：10.1007/s00024-011-0358-3

• Yellow Sea fog
• mechanism
• atmospheric boundary layer
• longwave radiation

New observations from buoys and soundings reveal the discrepancies in air-sea interface and in vertical structures between spring (April to May) and summer (July) fogs in the Yellow Sea. Spring fogs are shallow with a robust temperature inversion, dry layer and cold phase (surface air temperature or SAT is lower than sea surface temperature or SST); summer fogs are deep with weaker stability, indistinct fog top and warm phase (SAT > SST). Along with numerical simulations, conceptual models for the mechanisms of temperature inversion are suggested. The land-sea contrast is responsible for the robust temperature inversion in spring, and the deep southerlies derived from the east Asian summer monsoon and the adiabatic sinking from the western Pacific subtropical high contributes to the weaker inversion in summer. The dry layer above the sea fog top intensifies the longwave radiative cooling effect to lead to the cold phase in spring fogs. The radiative cooling is weaker in summer fogs resulting in SAT > SST.

• 出版日期2012-5
• 单位中国海洋大学