Spatial correlations in time and frequency domains between chlorophyll-<italic style="font-style: italic">a</italic> concentration and environmental factors in the Bohai Sea

Wan XU; Di MU; Zhenteng YANG; Dekui YUAN

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Spatial correlations in time and frequency domains between chlorophyll-a concentration and environmental factors in the Bohai Sea

Ecology | Updated：2024-10-11

- Spatial correlations in time and frequency domains between chlorophyll-a concentration and environmental factors in the Bohai Sea
- Journal of Oceanology and Limnology Vol. 42, Issue 4, Pages: 1143-1156(2024)
- Affiliations：
  
  1.Department of Mechanics, Tianjin University, Tianjin 300350, China
  2.Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
  3.State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
- Author bio：
  
  dkyuan@tju.edu.cn
- Funds：
- DOI：
  CLC：
- Received：12 August 2023，
  
  Online First：04 November 2023，
  
  Published：01 July 2024
- Accepted：
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XU Wan,MU Di,YANG Zhenteng,et al.Spatial correlations in time and frequency domains between chlorophyll-a concentration and environmental factors in the Bohai Sea[J].Journal of Oceanology and Limnology,2024,42(04):1143-1156.
DOI：

XU Wan,MU Di,YANG Zhenteng,et al.Spatial correlations in time and frequency domains between chlorophyll-a concentration and environmental factors in the Bohai Sea[J].Journal of Oceanology and Limnology,2024,42(04):1143-1156. DOI：

摘要

Abstract

Based on the reconstructed MODIS data and ECMWF reanalysis data from 2003 to 2021

spatial correlations between chlorophyll

(Chl

) and sea surface temperature (SST)

photosynthetically available radiation (PAR)

aerosol optical thickness (AOT)

and wind speed (WS) in the Bohai Sea were analyzed from the perspective of time domain and frequency domain. Results indicate that the frequency-domain analysis was more conducive to revealing the correlations between Chl

and environmental factors. The spatial pattern of time-domain correlations was similar to the isobaths of the Bohai Sea

which was positive in shallow waters and negative in deep waters for SST

PAR

and AOT

and was reversed for WS. Frequency-domain correlations were obtained by performing Fourier Transform and were higher than correlations in time domain. The spatial distributions indicated that the effects of SST and PAR on Chl

were greater than AOT and WS in the Bohai Sea. Additionally

cross-spectrum analysis was applied to explore the response relationships. A depth-dependent pattern was shown in correlations and time lags

indicating that the influential mechanism of environmental factors on Chl-

concentration is related to seawater depth.

关键词

Keywords

references

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Spatial correlations in time and frequency domains between chlorophyll-a concentration and environmental factors in the Bohai Sea

DOI：

摘要

Abstract

关键词

Keywords

references