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3 期 汪 红等:基于GWR降尺度的哀牢山2000 -2020年降水时空变化特征研究 653
图10 不同插值方法降水量(单位: mm)结果对比图(以2020年8月的数据为例)
Fig. 10 The comparisons of precipitation results (unit: mm) by different interpolation methods: EBK (Empirical
Bayesian Kriging) (a), AUNSPLINE method (b), and GWR downscaling method (c) in
this study (taking data in August 2020 as an example)
表1 2020年8月不同插值方法所得降水量与站点实测 dus Basin (UIB)[J]. Science of the Total Environment, 784:
数据对比 147140. DOI: 10. 1016/j. scitotenv. 2021. 147140.
Table 1 The comparisons of precipitation by different Arulraj M, Barros A P, 2019. Improving quantitative precipitation es‐
interpolation methods and from stations, taking timates in mountainous regions by modelling low--level seeder-
data in August 2020 as an example feeder interactions constrained by Global Precipitation Measure‐
ment Dual-frequency Precipitation Radar measurements[J]. Re‐
站点 站点数据 EBK AUNSPLINE GWR
mote Sensing of Environment, 231: 111213. DOI: 10. 1016/j.
编号 /mm /mm /mm /mm
rse. 2019. 111213.
1 425. 6 413. 7 145. 5 346. 7
Ashouri H, Hsu K L, Sorooshian S, et al, 2015. PERSIANN-CDR
2 113. 1 137. 1 37. 2 247. 3 daily precipitation climate data record from multisatellite observa‐
3 186. 6 195. 2 62. 3 283. 4 tions for hydrological and climate studies[J]. Bulletin of the
American Meteorological Society, 96 (1): 69-84. DOI: 10.
4 170. 4 179. 8 46. 1 165. 7
1175/BAMS-D-13-00068. 1.
5 432. 9 428. 2 301. 5 404. 8
Aslami F, Ghorbani A, Sobhani B, et al, 2019. Comprehensive com‐
parison of daily IMERG and GSMaP satellite precipitation prod‐
数据的空间细节得到明显丰富, 比原始数据更能满
ucts in Ardabil Province, Iran[J]. International Journal of Re‐
足地形复杂山区降水时空特征研究的需求。
mote Sensing, 40(8): 3139-3153. DOI: 10. 1080/01431161.
(2) 哀 牢 山 的 年 均 降 水 量 为 759. 2~1761. 7 2018. 1539274.
mm, 存在明显的时空差异, 且降水量在一定的海 Beck H E, van Dijk A, Levizzani V, et al, 2017. MSWEP: 3-hourly
拔(1200~1400 m)处存在高值区。降水量从 2 -12 0. 25 degrees global gridded precipitation (1979-2015) by merg‐
月呈先增加后降低的趋势, 在 7 月达到峰值。1 月 ing gauge, satellite, and reanalysis data[J]. Hydrology and Earth
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降水量的年际波动大, 受大气环流的影响显著。月
589-2017.
降水的空间分布特征与年降水基本一致。
Brunsdon C, Fotheringham A S, Charlton M E, 1996. Geographically
(3) 2000 -2020 年, 哀牢山年降水量的均值在 Weighted Regression: a method for exploring spatial nonstation‐
时间上的变化趋势不显著。哀牢山多数地区的年 arity[J]. Geographical Analysis, 28: 281-298. DOI: 10. 1111/
降水量呈减少趋势, 呈增加趋势的地区集中在哀牢 j. 1538-4632. 1996. tb00936. x.
山东南部。从月尺度上看, 1 月的降水量显著增 Chen M Y, Xie P P, Janowiak J E, et al, 2002. Global land precipita‐
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加, 5 月显著减少, 而其他月份的降水变化均不
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显著。
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