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Sea Surface Temperature Variability at the Scripps Institution of Oceanography Pier

机译:斯克里普斯海洋学研究所的海面温度变化

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摘要

Sea surface temperature (SST) has been measured from near the end of the Scripps Institution of Oceanography (SIO) pier daily since 1916. It is one of the world's longest instrumental time series of SST. It is widely used in studies of climate and marine ecosystems and in fisheries management. The authors hypothesized that a discontinuity exists in 1988, when the old pier was replaced with the present pier. A regression of annual-mean SST at SIO (SST_(SIO)) on the Pacific decadal oscillation index for 1916-87 was used to predict annual-mean SST (SST_(SIO, PDO)) for 1916-present. The residual (ResSST_(SIO) = SST_(SIO) - SST_(SIO, PDO)) time series shows a positive discontinuity in 1988, when the present SIO pier was first used to measure SST_(SIO). No discontinuity in 1988 was observed for ResSST at 12 other shore stations or in nearby waters. Use of the first principal component of other shore station time series of annual-mean SST as the predictor yields similar results. SST_(SIO) measured over 3 days shows a diel cycle and short-term variability consistent with rip current transport of warm surf-zone water to the end of the SIO pier. This study hypothesizes that rip current transport increased with the change from the old to the present pier and contributed to the observed discontinuity in SIO pier SST. The authors estimate an artifact of about +0.45℃ due to both rapid (1988 pier change) and gradual processes. Adjusting the SIO pier SST time series for this artifact reduces the long-term trend from +1.1° to +0.6℃ century~(-1), consistent with the global rate of change of SST over the past century.
机译:自1916年以来,每天都在斯克里普斯海洋学研究所(SIO)码头附近的尽头测量海表温度(SST)。它是世界上最长的SST仪器时间序列之一。它被广泛用于气候和海洋生态系统的研究以及渔业管理。作者假设,在1988年,当旧墩替换为现在的墩时,存在不连续性。使用1916-87年太平洋十年振荡指数的SIO年平均SST(SST_(SIO))回归来预测1916年至今的年平均SST(SST_(SIO,PDO))。剩余时间(ResSST_(SIO)= SST_(SIO)-SST_(SIO,PDO))时间序列在1988年呈正不连续性,当时该SIO墩首次用于测量SST_(SIO)。 1988年在其他12个岸站或附近水域未发现ResSST出现间断。使用年平均SST的其他岸站时间序列的第一个主成分作为预测变量,将产生相似的结果。在3天中测得的SST_(SIO)显示出diel周期和短期变异性,与温暖的冲浪带水向SIO码头末端的裂隙电流输送一致。这项研究假设,随着从旧码头到现在码头的变化,裂隙电流传输增加,并且导致SIO码头SST中观察到的不连续性。作者估计,由于快速(1988年码头变化)和逐渐发展的过程,人为产物约为+ 0.45℃。调整SIO码头SST的时间序列可降低这一长期趋势,从+ 1.1°到+ 0.6℃世纪〜(-1),与过去一个世纪SST的全球变化率一致。

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  • 来源
    《Journal of Physical Oceanography》 |2014年第11期|2877-2892|共16页
  • 作者单位

    Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0218;

    Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California;

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