Ocean Heat Uptake Processes: A Model Intercomparison
Ocean Heat Uptake Processes: A Model Intercomparison
复制标题
海洋吸热过程：模型比较
DOI：
10.1175/jcli-d-14-00235.1
复制
发表时间：
2015
影响因子：
4.9
通讯作者：
Robin S. Smith
中科院分区：
文献类型：
--
作者：
E. Exarchou;T. Kuhlbrodt;J. Gregory;Robin S. Smith
为了识别和解释海洋热吸收(OHU)过程的模式间差异，比较了三种全球气候模式的准平衡热平衡以及对4×CO2扰动的响应。研究发现，在准平衡状态下，对流和混合层过程以及与涡旋有关的过程都会导致次表层海洋的冷却。由平流和昼夜扩散过程引起的变暖平衡了冷却。研究还发现，在CO2扰动的气候中，OHU的最大贡献来自垂直混合过程和平均环流的变化，特别是在温带地区，这既是由风强迫的变化引起的，也是由高纬度浮力强迫的变化引起的。热带地区的气候显著变暖：其中很大一部分是由于温带外水平平流的变化造成的。昼夜扩散对OHU的贡献很小，主要是在热带地区，这主要是由于层结的增加而引起的。
AbstractThe quasi-equilibrium heat balances, as well as the responses to 4 × CO2 perturbation, are compared among three global climate models with the aim to identify and explain intermodel differences in ocean heat uptake (OHU) processes. It is found that, in quasi equilibrium, convective and mixed layer processes, as well as eddy-related processes, cause cooling of the subsurface ocean. The cooling is balanced by warming caused by advective and diapycnally diffusive processes. It is also found that in the CO2-perturbed climates the largest contribution to OHU comes from changes in vertical mixing processes and the mean circulation, particularly in the extratropics, caused both by changes in wind forcing and by changes in high-latitude buoyancy forcing. There is a substantial warming in the tropics: a significant part of which occurs because of changes in horizontal advection in extratropics. Diapycnal diffusion makes only a weak contribution to the OHU, mainly in the tropics, because of increased strati...