南海海域MODIS-Aqua叶绿素浓度产品的精度对比和区域性算法修正

赵文静; 曹文熙; 王桂芬; 胡水波; 林俊芳; 许占堂

doi:10.3788/OPE.20142211.3081

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南海海域MODIS-Aqua叶绿素浓度产品的精度对比和区域性算法修正

信息科学 | 更新时间：2020-08-13

- 南海海域MODIS-Aqua叶绿素浓度产品的精度对比和区域性算法修正
- Comparison of chlorophyll products derived from MODIS-Aqua and modification of operational algorithms in the South China Sea
- 光学精密工程 2014年22卷第11期页码：3081-3090
- 作者机构：
  
  1. 中国科学院大学北京,中国,100049
  2. 中国科学院南海海洋研究所, 热带海洋环境国家重点实验室,广东广州,510301
  3. 环境保护部华南环境科学研究所,广东广州,510655
- 作者简介：
- 基金信息：
  
  国家自然科学基金"广东省自然科学基金联合资助项目"(No.U0933005)();国家自然科学基金资助项目(No.41076014,No.41176035,No.412
- DOI：10.3788/OPE.20142211.3081
  中图分类号： TP79
- 收稿日期：2014-04-09，
  
  修回日期：2014-05-19，
  
  纸质出版日期：2014-11-25
- 稿件说明：
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赵文静, 曹文熙, 王桂芬等. 南海海域MODIS-Aqua叶绿素浓度产品的精度对比和区域性算法修正[J]. 光学精密工程, 2014,22(11): 3081-3090

ZHAO Wen-jing, CAO Wen-xi, WANG Gui-fen etc. Comparison of chlorophyll products derived from MODIS-Aqua and modification of operational algorithms in the South China Sea[J]. Editorial Office of Optics and Precision Engineering, 2014,22(11): 3081-3090
赵文静, 曹文熙, 王桂芬等. 南海海域MODIS-Aqua叶绿素浓度产品的精度对比和区域性算法修正[J]. 光学精密工程, 2014,22(11): 3081-3090 DOI： 10.3788/OPE.20142211.3081.

ZHAO Wen-jing, CAO Wen-xi, WANG Gui-fen etc. Comparison of chlorophyll products derived from MODIS-Aqua and modification of operational algorithms in the South China Sea[J]. Editorial Office of Optics and Precision Engineering, 2014,22(11): 3081-3090 DOI： 10.3788/OPE.20142211.3081.

摘要

利用2004~2012年在南海获得的9个航次的实测

Chl-a

数据

采用NASA标准业务化算法OC3和针对低

Chl-a

水体所发展的最新算法OCI反演获得了相应的MODIS-Aqua

Chl-a

产品。通过建立实测与遥感产品的时空匹配数据对

开展了

Chl-a

产品的适用性评估

并对比分析了上述两种算法的性能。在此基础上

利用南海实测遥感反射率(

(

))和MODIS-Aqua

(

)产品以及相应实测

Chl-a

的匹配数据集

分别对算法OC3和OCI进行了区域性修正。结果显示:基于算法OC3和OCI反演所得的MODIS-Aqua

Chl-a

产品值均高估了实测值

平均绝对误差(APD) 的精度分别为56.30%和42.58%

且算法OCI可明显改善低

Chl-a

水体(

0.25 mg·m

-3

)的反演精度;采用南海MODIS-Aqua

(

)产品与实测

Chl-a

匹配数据集(

=82)修正后的区域性算法NOC3和NOCI的精度均有不同程度提高

APD精度分别为37.85%和36.74%;采用现场实测

(

)与

Chl-a

匹配数据集(

=123)进行区域性修正后的算法INOC3和INOCI的APD精度分别为36.61%和37.79%

上述两种方案精度较为接近。因此

对于南海海域而言

算法的区域性修正对于改善MODIS-Aqua

Chl-a

产品精度非常重要。

Abstract

The performance of MODIS-Aqua

Chl-a

derived from the standard OC3 band-ratio algorithm and a new band-difference OCI algorithm are compared in the South China Sea(SCS) from the MODIS instrument on the Aqua satellite with nine cruises of chlorophyll measurements collected from 2004 to 2012. Then

the algorithms of OC3 and OCI were corrected by the parameter adjustments based on the satellite

in situ

remote sensing reflectance (

(

)) and corresponding

in situ

Chl-a

pairs respectively. The results show that MODIS-Aqua

Chl-a

products derived from OC3 and OCI algorithms overestimate the

in situ

data

with the Average Relative Error(APD) of 59.41% and 44.17%

respectively. However

the algorithm OCI significantly improves the retrieval accuracy for low chlorophyll concentration waters(

0.25 mg·m

-3

). After regional correction by MODIS-Aqua

(

) and corresponding

Chl-a

pairs

the algorithms are likely to fare better

and the modified algorithm NOC3 and NOCI show their APD accuracies are 37.85% and 36.74%

respectively. Moreover

the algorithms NOC3 and NOCI modified by

in situ

(

) and corresponding

Chl-a

pairs also give a good estimateion with the APD accuracy of 36.61% and 37.79%. Therefore

it suggests that to conduct the regional correction for the operational algorithms is important to improve the accuracy of

Chl-a

estimation in the SCS.

关键词

Keywords

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