气候变化研究进展 ›› 2021, Vol. 17 ›› Issue (5): 503-513.doi: 10.12006/j.issn.1673-1719.2020.246
收稿日期:
2020-10-23
修回日期:
2020-11-22
出版日期:
2021-09-30
发布日期:
2021-09-28
通讯作者:
任国玉
作者简介:
何佳骏,男,硕士研究生, 基金资助:
HE Jia-Jun1(), REN Guo-Yu1,2(), ZHANG Pan-Feng1,3
Received:
2020-10-23
Revised:
2020-11-22
Online:
2021-09-30
Published:
2021-09-28
Contact:
REN Guo-Yu
摘要:
当前的地面气候观测资料普遍存在非气候性因素导致的非均一性,对气候变化监测和研究结论可靠性造成重要影响。结合观测台站的历史沿革数据,使用ACMANT和Pairwise Comparisons方法以及RHtest V4软件,对北京地区20个台站均一化前的月平均气温序列进行了非均一性检验和订正,最后评估了均一化对北京地区气温序列变化趋势及其城市化偏差估算的影响。结果表明:除元数据中记录的断点外,无元数据记录的断点也会对序列的趋势变化造成明显影响,其中乡村站最显著;经过订正,1958—2018年整个北京地区、乡村站以及城市站增温趋势分别为0.27℃/(10 a)、0.10℃/(10 a)和0.32℃/(10 a),较订正前分别上升了0.03℃/(10 a)、0.06℃/(10 a)和0.02℃/(10 a)。利用均一化资料估算,1958—2018年北京观象台的城市化影响为0.24℃/(10 a),城市化贡献率为70.2%,评估结果较前人结论有所降低。可见,在现有的北京地区气温资料序列中,仍可能存在较明显的非均一性和未被记录的断点,对区域平均气温趋势估算具有显著影响。
何佳骏, 任国玉, 张盼峰. 资料均一化对气温变化趋势及其城市化偏差估计的影响:以北京地区为例[J]. 气候变化研究进展, 2021, 17(5): 503-513.
HE Jia-Jun, REN Guo-Yu, ZHANG Pan-Feng. Effects of data homogenization on the estimates of temperature trend and urbanization bias: taking Beijing area as an example[J]. Climate Change Research, 2021, 17(5): 503-513.
图3 斋堂站(a)、霞云岭站(b)、北京观象台(c)、大兴站(d)、乡村站(e)和城市站(f)订正前后的序列及其趋势对比
Fig. 3 Comparison of series and their trends before and after adjustment for Zhaitang station (a), Xiayunling station (b), Beijing Observatory (c), Daxing station (d), rural stations (e) and urban stations (f)
图5 北京地区20个台站的本文订正序列、Cao等[21]序列以及原始序列的对比
Fig. 5 Comparison between adjusted series from this paper (red), adjusted series from Cao et al[21] (blue), and raw series (green) of 20 stations in Beijing
图6 北京观象台、所有站、乡村站和城市站的年平均气温距平
Fig. 6 Annual mean surface air temperature anomaly of Beijing Observatory, all stations, rural stations and urban stations
表3 不同时期北京观象台的增温趋势、城市化影响和城市化贡献及其与前人研究的对比
Table 3 Warming trend, urbanization effects and urbanization contribution of Beijing observatory in different periods and comparison with previous studies
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