Decadal variability of chlorophyll a in the South China Sea: a possible mechanism

Fenfen Liu; Chuqun Chen; Haigang Zhan

doi:10.1007/s00343-012-1282-9

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Decadal variability of chlorophyll a in the South China Sea: a possible mechanism

Updated：2023-05-16

- Decadal variability of chlorophyll a in the South China Sea: a possible mechanism
- Journal of Oceanology and Limnology Vol. 30, Issue 6, Pages: 1054-1062(2012)
- Affiliations：
  
  1. State Key Laboratory of Oceanography in the Tropics South China Sea Institute of Oceanology Chinese Academy of Sciences
  2. Graduate University of Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-012-1282-9
  CLC：
- Online First：17 November 2012，
  
  Published：2012
- Accepted：
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Liu, F., Chen, C. & Zhan, H. Decadal variability of chlorophyll a in the South China Sea: a possible mechanism., Chin. J. Ocean. Limnol. 30, 1054–1062 (2012). https://doi.org/10.1007/s00343-012-1282-9
DOI：

Liu, F., Chen, C. & Zhan, H. Decadal variability of chlorophyll a in the South China Sea: a possible mechanism., Chin. J. Ocean. Limnol. 30, 1054–1062 (2012). https://doi.org/10.1007/s00343-012-1282-9 DOI：

摘要

Abstract

Four climatologies on a monthly scale (January

April

May and November) of chlorophyll a within the South China Sea (SCS) were calculated using a Coastal Zone Color Scanner (CZCS) (1979-1983) and the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) (1998-2002). We analyzed decadal variability of chlorophyll a by comparing the products of the two observation periods. The relationships of variability in chlorophyll a with sea surface wind speed (SSW)

sea surface temperature (SST)

wind stress (WS)

and mixed layer depth (MLD) were determined. The results indicate that there is obvious chlorophyll a decadal variability in the SCS. The decadal chlorophyll a presents distinct seasonal variability in characteristics

which may be as a result of various different dynamic processes. The negative chlorophyll a concentration anomaly in January was associated with the warming of SST and a shallower MLD. Generally

there were higher chlorophyll a concentrations in spring during the SeaWiFS period compared with the CZCS period. However

the chlorophyll a concentration exhibits some regional differences during this season

leading to an explanation being diffi cult. The deepened MLD may have contributed to the positive chlorophyll a concentration anomalies from the northwestern Luzon Island to the northeastern region of Vietnam during April and May. The increases of chlorophyll a concentration in northwestern Borneo during May may be because the stronger SSW and higher WS produce a deeper mixed layer and convective mixing

leading to high levels of nutrient concentrations. The higher chlorophyll a off southeastern Vietnam may be associated with the advective transport of the colder water extending from the Karimata Strait to southeastern Vietnam.

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