Climate Variability in Ocean Surface Turbulent Fluxes

0136934将检查O‘BrienOcean表面湍流通量与气候有关的可变性。海温、风速和气压通常会在这类研究中得到检验。观测到的风(速度和方向)和海温的变化改变了湍流地表通量，这对区域气候具有深远的影响。预计地表湍流通量(应力、感热和潜热)与气候变化的关系比风和气压更直接。类似的做法将适用于两个重叠的时期。我们将客观地为S以北30度以北的全球海洋提供一组覆盖1950年至2005年的高质量月表层通量(及相关场)，以考察大范围时空尺度(季节到年代际)的变异性。我们还将创建从1999年7月22日到2005年的类似的日场(包括地表辐射通量)，具有更高的空间分辨率。我们的目标是产生最准确的可用的磁通场。通过将经验正交函数等传统技术应用于适当的区域，将识别许多时间尺度上的可变性。湍流通量、地面风和海温变化的位置和时间尺度将与已知的与气候有关的振荡有关。这些客观分析将深入了解地表通量、风和海温与气候变化有关的过程。表层通量数据集还将促进将海洋表面通量变异性与区域气候变化联系起来的广泛研究。为了减少再分析面场中的已知偏差，现场(船舶和浮标)和卫星观测将客观地结合起来，以产生更好的湍流通量产品。通过这项研究开发的地表通量场可以用来帮助验证用海洋-大气耦合模式创建的通量场。这项研究中使用的与卫星相关的表面通量场将通过强制墨西哥湾的高分辨率海洋模型进行间接内部验证，我们的月度产品将由长期的合作者进行外部验证。我们的现场月度产品将与卫星产品进行比较。所有目标字段都将公开可用。

0136934 O'BrienOcean surface turbulent fluxes will be examined for climate-related variability. SSTs, winds, and pressures are typically examined in such studies. The observed changes in winds (speed and direction) and SSTs alter turbulent surface fluxes, which have a far-reaching influence on regional climatologies. It is expected that surface turbulent fluxes (stress, sensible heat, and latent heat) are more directly linked to climate-related changes than winds and pressures. Similar approaches will be applied to two overlapping periods. We will objectively derive a high quality set of monthly surface fluxes (and related fields), covering 1950 to 2005, for the global oceans north of ~30 degrees S to examine variability on a wide range of spatial and temporal scales (seasonal to decadal). We will also create similar daily fields (including surface radiative fluxes) from July 22, 1999 through 2005, with greater spatial resolution. Our goal is to produce the most accurate flux fields available. Variability on many time scales will be identified by applying traditional techniques such as Empirical Orthogonal Functions to appropriate regions. The location and time scale of the variability in turbulent fluxes, surface winds, and SSTs will be associated with known climate related oscillations. These objective analyses will provide insight into the processes through which surface fluxes, winds and SSTs are connected to climate change. The surface flux data set will also facilitate a wide range of studies relating ocean surface flux variability to regional climate change. In order to reduce the know biases in reanalysis surface fields, in-situ (ship and buoy) and satellite observations will be objectively combined to create a better turbulent-flux product. The surface flux fields developed though this study can be used to help validate flux fields created with couple ocean-atmospheric models. The satellite-related surface flux fields used in this study will be indirectly validated in-house by forcing a high resolution ocean model for the Gulf of Mexico, and our monthly products will be validated externally by long-time collaborators. Our in-situ based monthly products will be compared to the satellite products. All of the objective fields will be made publicly available.