The Coherence and Impact of Meridional Heat Transport Anomalies in the Atlantic Ocean Inferred from Observations
The Coherence and Impact of Meridional Heat Transport Anomalies in the Atlantic Ocean Inferred from Observations
复制标题
根据观测推断大西洋经向热传输异常的一致性和影响
DOI：
10.1175/jcli-d-12-00131.1
复制
发表时间：
2013
影响因子：
4.9
通讯作者：
J. Lyman
中科院分区：
文献类型：
--
作者：
K. Kelly;L. Thompson;J. Lyman
摘要利用水文资料中的热致海平面（TSL）、重力恢复与气候实验（GRACE）的等效水厚（EWT）和测高海面高度（SSH）来推断大西洋经向热输运（MHT）异常。在8个区域中，每个区域的卡尔曼滤波器的“未知控制”版本从对月地表热量和淡水通量的响应与观测到的质量和热含量之间的差异中提取热传输收敛（HTC）的平滑估计。使用了两个模型：模型A只使用1993-2010年的热量预算，模型B同时使用2003 - 2010年的热量和质量预算。基于质量对SSH的贡献较小，使用SSH代替TSL重新运行模型A，以提高时间分辨率和数据一致性。MHT的估计是通过假定在北纬67°的异常可以忽略不计或将MHT设置为北纬40°附近的观测值，将HTC从北到南加起来得出的。两种方法都表明MHT是高度coh的。
AbstractObservations of thermosteric sea level (TSL) from hydrographic data, equivalent water thickness (EWT) from the Gravity Recovery and Climate Experiment (GRACE), and altimetric sea surface height (SSH) are used to infer meridional heat transport (MHT) anomalies for the Atlantic Ocean. An “unknown control” version of a Kalman filter in each of eight regions extracts smooth estimates of heat transport convergence (HTC) from discrepancies between the response to monthly surface heat and freshwater fluxes and observed mass and heat content. Two models are used: model A using only the heat budget for 1993–2010 and model B using both heat and mass budgets for 2003–10. Based on the small contributions of mass to SSH, model A is rerun using SSH in place of TSL to improve temporal resolution and data consistency. Estimates of MHT are derived by summing the HTC from north to south assuming either negligible anomalies at 67°N or setting MHT to observed values near 40°N. Both methods show that MHT is highly coh...
影响因子：
5.2
作者：
Bingham, Rory J.;Hughes, Chris W.;Williams, Richard G.
通讯作者：
Williams, Richard G.