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Title: Changes in sea surface temperature seasonality in the Bay of Biscay over the last decades (1982-2014)
Author: Costoya, X.
deCastro, M.
Gómez-Gesteira, M.
Santos, F.
Keywords: Sea surface temperature
Bay of Biscay
Warm season duration
Extreme hot SST days
Issue Date: 2015
Publisher: Elsevier
Abstract: Sea surface temperature (SST) variability was analyzed for the Bay of Biscay over the period 1982–2014 using data from NOAA 1/4 degree daily OI database. Trends were analyzed on a monthly scale since previous studies suggest that the rate of change was not homogeneous at annual and seasonal scales. The warming calculated for the whole area at the annual scale was 0.26 ± 0.03°C dec−1, although the intensity was observed to depend on themonth. Higher warming trends were detected from September to November and from April to June with values higher than 0.3°C dec−1, whilst lower SST trends were detected from January to March and from July to August with values below0.2°C dec−1.Warming ismainly due to the increase in the duration of thewarmseason (between 6 and 14 days dec−1)more than the milder winters or warmer summers. This fact ismainly responsible for the increase in the frequency of extreme hot SST days measured in spring (1.16 ± 0.23 days dec−1) and autumn (1.81±0.42 days dec−1). In contrast, trends observed during the warmestmonth (August), are characterized by an increase (~1.0 days dec−1) near shore and a decrease (~−1.0 days dec−1) in the oceanic part of the bay.
Peer review: yes
DOI: 10.1016/j.jmarsys.2015.06.002
ISSN: 0924-7963
Appears in Collections:CESAM - Artigos

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