| A COMPARISON AND EVALUATION OF TWO CENTENNIAL-SCALE SEA SURFACE TEMPERATURE DATASETS IN THE CHINA SEAS AND THEIR ADJACENT SEA AREAS |
| Revised:September 11, 2018 |
| KeyWords:sea surface temperature regional climate change comparison linear trend Taylor diagram |
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| Abstract: |
| Two reconstructed sea surface temperature (SST) datasets
(HadISST1 and COBE SST2) with centennial-scale are compared on the SST
climate change over the China Seas and their adjacent sea areas. Two
independent datasets show consistency in statistically significant
trends, with a warming trend of 0.07–0.08°C per decade from 1890 to
2013. However, in shorter epochs (such as 1961–2013 and 1981–2013),
HadISST1 exhibits stronger warming rates than those of COBE SST2. Both
datasets experienced a sudden decrease in the global hiatus period
(1998–2013), but the cooling rate of HadISST1 is lower than that of
COBE SST2. These differences are possibly caused by the different
observations sources which are incorporated to fill with data-sparse
regions since 1982. Different data sources may lead to higher values in
HadISST1 from 1981 to 2013 than that in COBE SST2. Meanwhile, the
different data sources and bias adjustment before the World War II may
also cause the large divergence between COBE SST2 and HadISST1, leading
to lower SST from 1891 to 1930. These findings illustrate that the
long-term linear trends are broadly similar in the centennial-scale in
the China Seas using different datasets. However, there are large
uncertainties in the estimate of warming or cooling tendency in the
shorter epochs, because there are different data sources, different
bias adjustment and interpolation method in different datasets. |
| DOI：10.16555/j.1006-8775.2018.04.004 |
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