Temporal variability of temperature-nitrate relationship in a coastal region

Jianping Yin; Li Lin; Youshao Wang; Jianwei Du

doi:10.1007/s00343-014-3136-0

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Temporal variability of temperature-nitrate relationship in a coastal region

Updated：2023-05-16

- Temporal variability of temperature-nitrate relationship in a coastal region
- Journal of Oceanology and Limnology Vol. 32, Issue 4, Pages: 879-885(2014)
- Affiliations：
  
  1. State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
  3. South China Institute of Environmental Sciences of Ministry of Environmental Protection
- Author bio：
- Funds：
- DOI：10.1007/s00343-014-3136-0
  CLC：
- Online First：11 July 2014，
  
  Published：2014
- Accepted：
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Yin, J., Lin, L., Wang, Y. et al. Temporal variability of temperature-nitrate relationship in a coastal region., Chin. J. Ocean. Limnol. 32, 879–885 (2014). https://doi.org/10.1007/s00343-014-3136-0
DOI：

Yin, J., Lin, L., Wang, Y. et al. Temporal variability of temperature-nitrate relationship in a coastal region., Chin. J. Ocean. Limnol. 32, 879–885 (2014). https://doi.org/10.1007/s00343-014-3136-0 DOI：

摘要

Abstract

The inverse relationship between nitrate and temperature (N-T relationship) has been used to estimate new production from remotely sensed sea surface temperature at the regional or global scale of oceans. This study aimed to develop a time-series model of the N-T relationship from automated

continuous hourly observations over two years on the coast of Halifax

Canada. The model demonstrated time-series variability of the N-T relationship at a coastal station on the Nova Scotia Shelf

with adjusted R 2 =0.999 4 and RMSE=0.025 7. The maximum residual value was 0.077. The annual temperature variations described a sine curve

and daily

weekly

and monthly variations fluctuated within the normal ranges

controlled by the local climate. The annual variation of nitrate concentration formed nearly a sine curve. Heavy or longlasting rainfall increased nitrate concentration by 4 to 30-fold in 24 h

and then the increased nitrogen was quickly depleted by phytoplankton growth in 10 to 48 h. In general

biological activity was a key factor in causing nitrate concentration change

dependent mainly on seawater temperature. The power function of the N-T relationship observed in our study area could be used to quickly estimate sea surface nitrate concentration

in combination with temperature data obtained by remote sensing.

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Keywords

references

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