Upper-Ocean Processes under the Stratus Cloud Deck in the Southeast Pacific Ocean

被引:24
作者
Zheng, Yangxing [1 ]
Shinoda, Toshiaki [2 ]
Kiladis, George N. [1 ]
Lin, Jialin [3 ]
Metzger, E. Joseph [2 ]
Hurlburt, Harley E. [2 ]
Giese, Benjamin S. [4 ]
机构
[1] NOAA, ESRL, CIRES Climate Diagnost Ctr, Boulder, CO 80305 USA
[2] USN, Res Lab, Stennis Space Ctr, MS 39529 USA
[3] Ohio State Univ, Dept Geog, Columbus, OH 43210 USA
[4] Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA
基金
美国海洋和大气管理局;
关键词
DATA ASSIMILATION ANALYSIS; TROPICAL PACIFIC; INTERANNUAL VARIABILITY; SEASONAL CYCLE; INDIAN-OCEAN; CIRCULATION; MODEL; COORDINATE; SENSITIVITY; DYNAMICS;
D O I
10.1175/2009JPO4213.1
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
The annual mean heat budget of the upper ocean beneath the stratocumulus/stratus cloud deck in the southeast Pacific is estimated using Simple Ocean Data Assimilation (SODA) and an eddy-resolving Hybrid Coordinate Ocean Model (HYCOM). Both are compared with estimates based on Woods Hole Oceanographic Institution (WHOI) Improved Meteorological (IMET) buoy observations at 20 degrees S, 85 degrees W. Net surface heat fluxes are positive (warming) over most of the area under the stratus cloud deck. Upper-ocean processes responsible for balancing the surface heat flux are examined by estimating each term in the heat equation. In contrast to surface heat fluxes, geostrophic transport in the upper 50 m causes net cooling in most of the stratus cloud deck region. Ekman transport provides net warming north of the IMET site and net cooling south of the IMET site. Although the eddy heat flux divergence term can be comparable to other terms at a particular location, such as the IMET mooring site, it is negligible for the entire stratus region when area averaged because it is not spatially coherent in the open ocean. Although cold-core eddies are often generated near the coast in the eddy-resolving model, they do not significantly impact the heat budget in the open ocean in the southeast Pacific.
引用
收藏
页码:103 / 120
页数:18
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