Climate Variability in Ocean Surface Turbulent Fluxes

[136934]海洋表面湍流通量将被研究与气候有关的变率。在这类研究中，海温、风和压力是典型的检查对象。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）比风和压力与气候相关的变化有更直接的联系。类似的办法将适用于两个重叠的时期。我们将客观地推导出一套高质量的1950年至2005年期间~30°S以北全球海洋的月地表通量（及相关场），以便在广泛的空间和时间尺度（季节到年代际）上检验其变异性。从1999年7月22日到2005年，我们还将以更高的空间分辨率创建类似的每日场（包括地表辐射通量）。我们的目标是产生最精确的通量场。许多时间尺度上的变异性将通过在适当区域应用传统技术（如经验正交函数）来确定。湍流通量、地面风和海温变率的位置和时间尺度将与已知的与气候有关的振荡联系起来。这些客观分析将有助于深入了解地表通量、风和海温与气候变化之间的联系过程。表面通量数据集还将促进将海洋表面通量变率与区域气候变化联系起来的广泛研究。为了减少再分析表面场的已知偏差，将现场（船舶和浮标）和卫星观测客观地结合起来，以产生更好的湍流通量产品。通过本研究建立的表面通量场可以用来帮助验证由一对海洋-大气模型建立的通量场。本研究中使用的与卫星相关的地表通量场将通过强迫墨西哥湾的高分辨率海洋模型在内部间接验证，我们每月的产品将由长期合作者在外部验证。我们基于现场的月度产品将与卫星产品进行比较。所有的客观领域都将公开提供。

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.