Importance of Circulation Changes to Atlantic Heat Storage Rates on Seasonal and Interannual Time Scales
Importance of Circulation Changes to Atlantic Heat Storage Rates on Seasonal and Interannual Time Scales
复制标题
环流变化对季节性和年际时间尺度上大西洋储热率的重要性
DOI：
10.1175/jcli-d-11-00123.1
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发表时间：
2012
影响因子：
4.9
通讯作者：
R. Ponte
中科院分区：
文献类型：
--
作者：
C. Piecuch;R. Ponte
摘要：对海洋热量收支和传输进行诊断，以阐明大气环流变化对大西洋储热率的重要性。重点是低纬度和中纬度地区以及季节和年际时间尺度。使用了对 1993 年至 2004 年海洋状况的估计，该估计是通过拉格朗日乘数方法拟合观测结果的粗分辨率大气环流模型产生的。经向热传输首先分解为时均和时变速度和温度的贡献，其次分解为纬向对称斜压（翻转，包括埃克曼）和纬向不对称（环流和其他空间相关）环流的贡献。然后，储热率归因于海洋-大气热交换、扩散混合以及与经向热传输的各个组成部分相关的平流过程。结果表明，季节性蓄热变化通常代表对地表热量输入的局部响应，但季节性平流变化......
AbstractOcean heat budgets and transports are diagnosed to elucidate the importance of general circulation changes to Atlantic Ocean heat storage rates. The focus is on low- and midlatitude regions and on seasonal and interannual time scales. An estimate of the ocean state over 1993–2004, produced by a coarse-resolution general circulation model fit to observations via the method of Lagrange multipliers, is used. Meridional heat transports are first decomposed into contributions from time-mean and time-variable velocity and temperature and second from zonally symmetric baroclinic (overturning, including Ekman) and zonally asymmetric (gyre and other spatially correlated) circulations. Heat storage rates are then ascribed to ocean–atmosphere heat exchanges, diffusive mixing, and advective processes related to the various components of the meridional heat transport. Results show that seasonal heat storage changes generally represent a local response to surface heat inputs, but seasonal advective changes are ...