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Daily temperature and pressure series for Salem, Massachusetts (1786–1829)

机译:马萨诸塞州塞勒姆的每日温度和压力系列(1786-1829年)

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The digitization and homogenization of a record with four daily thermometer and two daily barometer readings is described for the meteorological journal of Dr. E. A. Holyoke of Salem (Massachusetts). These records begin in January 1786 and span the period to March 1829 for temperature, and the period to December 1820 for pressure. The records are reconstructed and some inhomogeneities are identified and corrected for. The temperature data compares favourably with monthly temperature data from New Haven (Connecticut) and a comparison with independently reconstructed daily pressure data for nearby Cambridge (1780–1789) show that the temporal variations of the data agree very well. It is shown that the number of extremely cold days was considerably greater during 1786–1829 than recent times, while the number of warm days in the early and modern records are comparable. A probability distribution of daily winter pressure values shows a mean of the distribution which is 3 to 4 hPa lower during 1786–1820.
机译:塞勒姆(E.A.这些记录始于1786年1月,温度跨度一直到1829年3月,压力跨度一直到1820年12月。重建记录,识别并纠正一些不均匀性。该温度数据与来自纽黑文(康涅狄格州)的每月温度数据相比具有优势,并且与附近剑桥(1780–1789年)独立重建的每日压力数据的比较表明,数据的时间变化非常吻合。结果表明,在1786年至1829年期间,极端寒冷的天数比最近的要多得多,而早期和现代记录中的温暖天数是可比的。每日冬季压力值的概率分布显示了在1786年至1820年之间平均分布降低了3至4 hPa。

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