| 摘要: |
| Argo浮标观测的溶解氧数据的质量控制方法目前还还不够完善，其中传统的气候态校正方法存在的问题主要表现为会受到异常剖面和异常斜率系数的影响。本文针对这些问题，提出了一套气候态校正方法的改进方案，包括：1）使用中值法取代平均值法；2）利用比较浮标观测的溶解氧饱和度整个剖面与气候态剖面的方法，提出了一种异常剖面的剔除标准；3）提出了一种异常斜率系数的剔除标准。改进后的溶解氧剖面与气候态剖面更为接近，有效避免了异常剖面与异常值的影响，显著提高了Argo浮标观测溶解氧的整体数据质量。 |
| 关键词: Argo浮标 溶解氧 气候态校正 斜率系数 异常剖面 |
| DOI：10.11693/hyhz20190100002 |
| 分类号:P332.7;P714;P715.5 |
| 基金项目:青岛海洋科学与技术试点国家实验室开放基金项目，QNLM2016ORP0103号；中央级公益性科研院所基本科研业务费专项资金资助项目，QNYC1702号，14283号。 |
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| AN IMPROVEMENT ON CLIMATOLOGY-BASED CORRECTION METHOD OF ARGO-OBSERVED DISSOLVED OXYGEN DATA |
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LIU Ye, XING Xiao-Gang
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Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
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| Abstract: |
| To date, the quality control methods on Argo-observed dissolved oxygen data remain inadequate, marked mainly by the vulnerability of classical climatology-based correction method to abnormal float-observed oxygen profiles and abnormal slope coefficients. In this context, we proposed a set of improvements on the classical method, including 1) replacing the average with the median, 2) proposing an Abnormal Profile Elimination Criterion to remove some slope coefficients with abnormal profiles based on comparison between the whole float-observed profile and climatology, and 3) proposing an Outlier Elimination Criterion to remove some outliers of slope coefficients. Using the improved correction coefficients, the corrected oxygen profiles are much closer to the climatology, which could effectively avoid the influence of abnormal profiles and abnormal slope coefficients, and significantly enhance the Argo-observed oxygen data quality. |
| Key words: Argo float dissolved oxygen climatology-based correction slope coefficient abnormal profile |
