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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Surface heat fluxes from the NCEP/NCAR and NCEP/DOE reanalyses at the Kuroshio Extension Observatory buoy site
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Surface heat fluxes from the NCEP/NCAR and NCEP/DOE reanalyses at the Kuroshio Extension Observatory buoy site

机译：来自NCEP / NCAR和NCEP / DOE的表面热通量在黑潮延伸天文台浮标处进行了重新分析

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摘要

Surface heat fluxes from the Kuroshio Extension Observatory (KEO) buoy are compared with surface heat fluxes from the National Centers for Environmental Prediction (NCEP)/National Center for Atmospheric Research reanalysis (NRA1) and NCEP/Department of Energy reanalysis (NRA2). KEO surface measurements include downward solar and longwave radiation, wind speed and direction, relative humidity, rain rate, and air and sea surface temperature. For solar radiation, NRA2 had better agreement with KEO than NRA1. Both reanalyses underestimated shortwave radiation in summer and slightly overestimated it in winter. Turbulent surface heat fluxes are estimated with the KEO surface data using the Coupled Ocean-Atmosphere Response Experiment (COARE) version 3.0 bulk algorithm. Both NRA1 and NRA2 latent heat flux (LHF) are larger than KEO LHF, consistent with previous studies. However, the comparison shows larger errors than previously thought. Indeed, the latent heat flux bias for NRA1 is 41 W m?2 and for NRA2 is 62 W m?2 (indicating that the bias between NRA1 and NRA2 is 21 W m?2). For latent heat flux, the large bias is caused primarily by the NRA bulk flux algorithm, while the root mean square (RMS) error is caused primarily by errors in the NRA meteorological variables. The combination of the biases for each heat flux is such that total NRA heat transfer from the ocean to the atmosphere is considerably larger than observed by KEO. These results highlight the importance of maintaining in situ observations for monitoring surface heat fluxes in the Kuroshio/Kuroshio Extension regions.
机译：将黑潮延伸天文台（KEO）浮标的表面热通量与国家环境预测中心（NCEP）/国家大气研究再分析中心（NRA1）和NCEP /能源再分析部门（NRA2）的表面热通量进行了比较。 KEO表面测量包括向下的太阳辐射和长波辐射，风速和风向，相对湿度，降雨率以及空气和海面温度。对于太阳辐射，NRA2与KEO的协议要好于NRA1。两者都重新分析了夏季对短波辐射的低估，而冬季则略微高估了短波辐射。使用耦合海洋-大气响应实验（COARE）3.0版批量算法，利用KEO表面数据估算湍流表面热通量。 NRA1和NRA2潜热通量（LHF）均大于KEO LHF，这与以前的研究一致。但是，比较显示出比以前认为的更大的错误。实际上，NRA1的潜热通量偏差是41W m？2，NRA2的潜热通量偏差是62Wm？2（表明NRA1和NRA2之间的偏差是21W m？2）。对于潜热通量，较大的偏差主要由NRA体积通量算法引起，而均方根（RMS）误差主要由NRA气象变量中的误差引起。每个热通量的偏差组合起来使得NRA从海洋到大气的总传热比KEO观察到的大得多。这些结果突显了保持原位观测以监测黑潮/黑潮延伸区地表热通量的重要性。

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