Assessment of the Outgoing Longwave Radiation Fields in the National Centers for Environmental Prediction (NCEP) Reanalysis and Forecast Products

小行星9523536 与对流活动相关的潜热释放是驱动大气环流的重要大气加热源。 由于云大大减少了地球向外的长波辐射（OLR），卫星获得的OLR场至少在热带地区可以用来识别强对流活动和大气加热的区域。 虽然热带对流和全球环流模式之间的关系已经在观测研究中建立，但由于缺乏可以与观测进行比较的模式导出的OLR场，因此对全球模式模拟这种联系的有效性进行评估受到阻碍。 作为国家环境预报中心（NCEP）正在进行的再分析项目的一部分，正在制作大气层顶的OLR场，作为数据同化的一部分，并用于预报（至8天）产品。 Nogues-Paegle博士将审查1985-1993年的再分析产品，将OLR的模型模拟与同期的卫星测量场进行比较。 她还将通过评估初始热带对流场的不确定性对中纬度地区预报的影响来评估NCEP模式的预报技巧。 这些研究将为更广泛的大气科学界提供关于再分析产品质量和NCEP模式参数化有效性的重要见解。 ***

9523536 Nogues-Paegle The latent heat release associated with convective activity is an important source of atmospheric heating which drives atmospheric circulations. Because clouds greatly reduce the earth's outgoing longwave radiation (OLR), satellite-derived OLR fields can be used, at least in tropical regions, to identify regions of vigorous convective activity, and atmospheric heating. While the relationship between tropical convection and global circulation patterns has been established in observational studies, an assessment of the effectiveness of global models to simulate this connection has been hampered by the lack of model derived OLR fields that could be compared with observations. As part of the reanalysis project underway at the National Centers for Environmental Prediction (NCEP), OLR fields for the top of the atmosphere are being produced both as part of the data assimilation and for the forecast (to eight days) products. Dr. Nogues-Paegle will examine the reanalysis products for 1985-1993, comparing the model simulations of OLR to satellite measured fields for the same periods. She also will assess the NCEP model forecast skill by assessing the effect of uncertainties in initial tropical convection field on forecasts for the mid-latitudes. These studies should provide for the broader atmospheric sciences community important insights into quality of the reanalysis products and the effectiveness of the NCEP model parameterizations. ***