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首页> 外文期刊>Theoretical and applied climatology >Homogeneity assessment of a station climate series (1933-2005) in the Metropolitan Area of Sao Paulo: instruments change and urbanization effects
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Homogeneity assessment of a station climate series (1933-2005) in the Metropolitan Area of Sao Paulo: instruments change and urbanization effects

机译：圣保罗大都市区气象站序列（1933-2005年）的同质性评估：工具变化和城市化影响

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This work assessed homogeneity of the Institute of Astronomy, Geophysics and Atmospheric Sciences (IAG) weather station climate series, using various statis tical techniques. The record from this target station is one of the longest in Brazil, having commenced in 1933 with observations of precipitation, and temperatures and other variables later in 1936. Thus, it is one of the few stations in Brazil with enough data for long-term climate variability and climate change studies. There is, however, a possibility that its data may have been contaminated by some artifacts over time. Admittedly, there was an intervention on the observations in 1958, with the replacement of instruments, for which the size of impact has not been yet evaluated. The station transformed in the course of time from rural to urban, and this may also have influenced homogeneity of the observations and makes the station less representative for climate studies over larger spatial scales. Homogeneity of the target station was assessed applying both absolute, or single station tests, and tests relatively to regional climate, in annual scale, regarding daily precipitation, relative humidity, maximum (TMax), minimum (TMin), and wet bulb temperatures. Among these quantities, only precipita tion does not exhibit any inhomogeneity. A clear signal of change of instruments in 1958 was detected in the TMax and relative humidity data, the latter certainly because of its strong dependence on temperature. This signal is not very clear in TMin, but it presents non-climatic discontinuities around 1953 and around 1970. A significant homogeneity break is found around 1990 for TMax and wet bulb temperature. The discontinuities detected after 1958 may have been caused by urbanization, as the observed warming trend in the station is considerably greater than that corresponding to regional climate.
机译：这项工作使用各种统计技术评估了天文学，地球物理和大气科学研究所（IAG）气象站气候系列的均匀性。该目标站的记录是巴西最长的记录之一，始于1933年，始于1936年后期对降水，温度和其他变量的观测。因此，它是巴西为数不多的具有足够长期数据的站之一气候变异性和气候变化研究。但是，随着时间的流逝，其数据可能已被某些伪影污染。诚然，1958年对观测进行了干预，更换了仪器，但尚未评估影响的大小。随着时间的流逝，气象站从农村变为城市，这也可能影响观测的均一性，并使气象站在较大空间尺度上对气候研究的代表性降低。使用绝对或单站测试评估目标站的同质性，并在年度范围内就每日降水，相对湿度，最高（TMax），最低（TMin）和湿球温度进行相对于区域气候的测试。在这些数量中，只有沉淀不显示任何不均匀性。在TMax和相对湿度数据中检测到1958年仪器变化的明确信号，后者肯定是由于其对温度的强烈依赖性。该信号在TMin中不是很清楚，但是在1953年和1970年左右呈现非气候不连续性。在1990年左右，对于TMax和湿球温度，发现了明显的同质性断裂。 1958年后发现的不连续性可能是城市化造成的，因为观测到的站内变暖趋势大大大于对应于区域气候的变暖趋势。

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  • 来源
    《Theoretical and applied climatology》 |2012年第4期|p.361-374|共14页
  • 作者

    Shigetoshi Sugahara; Rosmeri Porfirio da Rocha; Rita Yuri Ynoue; Reinaldo Bomfim da Silveira;

  • 作者单位

    Institute de Pesquisas Meteorologicas e Programade Pos-Graduacao da Faculdade de Ciencias, UNESP/Bauru,Av. Luis Edmundo Carrijo Coube 14-01,Bauru, SP 17033-360, Brazil;

    Departamento de Ciencias Atmosfericas,Universidade de Sao Paulo,Rua do Matao, 1226, Cid. Universitaria,Sao Paulo, SP 05508-090, Brazil;

    Departamento de Ciencias Atmosfericas,Universidade de Sao Paulo,Rua do Matao, 1226, Cid. Universitaria,Sao Paulo, SP 05508-090, Brazil;

    Instituto Tecnologico SIMEPAR, Centra Politecnico da UFPR,Jardim das Americas,Curitiba, PR 81531-980, Brazil;

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