| 利用船测近海层湍流热通量资料验证OAFlux数据集 |
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| 引用本文： | 徐小慧,高志球.利用船测近海层湍流热通量资料验证OAFlux数据集[J].气候与环境研究,2012,17(3):281-291. |
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| 作者姓名： | 徐小慧 高志球 |
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| 作者单位： | 1. 中国科学院研究生院,北京100049;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100029
2. 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029 |
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| 基金项目： | 中国科学院"百人计划"项目:海-气、陆-气相互作用观测与模拟研究 |
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| 摘 要： | 美国伍兹霍尔海洋研究所(Woods Hole Oceanographic Institution,WHOI)的客观分析海气通量(Objectively Analyzed air-sea Fluxes,OAFlux)数据集中的近海层湍流热通量数据被公认为最可信,并被广泛地用于气候模式模拟结果检验。利用NOAA ETL(Environmental Technology Laboratory)两个固定观测站点的科学试验的船测通量数据库(TOGA COARE试验观测资料和KAWJEX试验观测资料),对OAFlux的热通量进行验证。结果表明:OAFlux的潜热通量普遍高于船测值,并且风速较大时,两者差异较大。风速对潜热通量的变化趋势起主导作用,海表和大气湿度差影响甚微。低风条件下,OAFlux的潜热通量和船测值差异则很小。海面湍流感热交换很弱,通量值本身依然受到风速的主导作用,但由于感热通量值与观测仪器误差十分接近,导致比较分析异常困难。分析结果表明:在上述两个观测试验期内,由于海表空气湿度和大气的湿度差变化不显著,海气相互作用的强度主要取决于海面风速的变化。
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| 关 键 词： | OAFlux 潜热通量 感热通量 风速 |
| 收稿时间： | 8/9/2010 12:00:00 AM |
| 修稿时间： | 2011/11/25 0:00:00 |
Testing OAFlux Field by Using the Shipborne Heat Flux Measurements |
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| XU Xiaohui and GAO Zhiqiu.Testing OAFlux Field by Using the Shipborne Heat Flux Measurements[J].Climatic and Environmental Research,2012,17(3):281-291. |
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| Authors: | XU Xiaohui and GAO Zhiqiu |
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| Institution: | Graduate University of Chinese Academy of Sciences, Beijing 100049;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The OAFlux (Objectively Analyzed air-sea Fluxes) database, provided by the Woods Hole Oceanographic Institution, and widely applied in the validation of climate models, is tested by using the TOGA COARE and KAWJEX measurements which are two serial survey databases of NOAA ETL(Environmental Technology Laboratory). The result shows that the latent heat flux of OAFlux is systematically higher than that of ETL, and the difference between them is comparatively large when the heat flux is large itself. Wind velocity plays a dominant role on the change of latent heat when the influence of humidity difference is minimal. In addition, when the sea surface temperature, air temperature, and wind direction do not vary much, the latent difference between OAflux and direct measurements is significant under medium to large wind speed condition and is minimal under the low wind condition. Meanwhile, the sensible heat exchange is very weak and the values are still mainly controlled by wind speed. However, the values of the measured sensible heat flux are very close to the instrument error, leading to difficulty in comparison analysis. The result also shows that the interaction between air and sea mainly depended on the wind velocity when the humidity difference between sea surface and air did not change much during the experimental periods. |
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| Keywords: | OAFlux latent heat flux sensible heat flux wind speed |
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