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    不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响

    张青全 潘云 宫辉力 郑龙群 诸云强

    张青全, 潘云, 宫辉力, 郑龙群, 诸云强, 2019. 不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响. 地球科学, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153
    引用本文: 张青全, 潘云, 宫辉力, 郑龙群, 诸云强, 2019. 不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响. 地球科学, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153
    Zhang Qingquan, Pan Yun, Gong Huili, Zheng Longqun, Zhu Yunqiang, 2019. The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area. Earth Science, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153
    Citation: Zhang Qingquan, Pan Yun, Gong Huili, Zheng Longqun, Zhu Yunqiang, 2019. The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area. Earth Science, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153

    不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响

    doi: 10.3799/dqkx.2019.153
    基金项目: 

    国家自然科学基金面上项目 41771456

    贵州省公益性基础性地质工作项目 黔国土资地环函[2014]23号

    国家重点研发计划 2017YFC0405802

    详细信息
      作者简介:

      张青全(1995-), 男, 硕士研究生, 主要从事遥感水文方面的研究

      通讯作者:

      潘云

    • 中图分类号: P343

    The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area

    • 摘要: 不同滤波方法反演陆地水储量变化的结果不同,但目前关于西南岩溶区的不同滤波方法之间的对比研究相对较少.利用Gauss 200 km、Fan 200 km、Han 200 km和DDK4四种滤波方法反演了西南岩溶区的陆地水储量变化,并采用尺度因子进行了校正.在空间分布上,Han和Fan滤波较Gauss滤波更为平滑,但损失的真实信号更多,Han滤波损失最为严重;DDK滤波在进行南北向滤波的同时更能保持原始信号的量级和形状.在时间序列上,4种滤波的陆地水储量距平(TWSA)年趋势分别为8.64、8.77、9.05和9.39 mm/a,周年振幅分别为90.19、94.47、112.92和89.34.不同滤波反演的陆地水储量变化的空间分布差异较大;4种滤波的周年相位差别不大,且由于尺度因子的影响,校正后的陆地水储量距平振幅大小顺序为Han > Fan > Gauss > DDK.对于研究区的陆地水储量变化反演,Fan滤波和DDK滤波较好.

       

    • 图  1  西南岩溶区分布与研究区位置

      Fig.  1.  Southwest karst area distribution and the location of the study area

      图  2  GRACE反演的陆地水储量变化与实测对比

      Fig.  2.  The comparison between GRACE inversion of terrestrial water storage changes and in situ data

      图  3  Gauss 200 km、Fan 200 km、Han 200 km、DDK4反演的陆地水储量变化(a~d)及尺度因子校正后的储量变化(e~h)

      Fig.  3.  The change trend of terrestrial water storage inversion of Gauss 200 km, Fan 200 km, Han 200 km, and DDK4 before(a-d)and after(e-h)the scale factor correction

      图  4  经尺度因子校正的4种滤波反演的TWSA与降水量的时间序列图

      Fig.  4.  Time series diagram of TWSA and precipitation by four kinds of filter inversion corrected by scale factor

      图  5  不同滤波器反演的TWSA时间序列周年振幅空间分布

      Fig.  5.  The annual amplitude spatial distribution of TWSA time series for different filter inversion

      a.Gauss 200 km; b.Fan 200 km; c.Han 200 km; d.DKK4

      图  6  不同滤波器反演的TWSA时间序列周年相位空间分布

      Fig.  6.  The annual phase spatial distribution of TWSA time series for different filter inversion

      a.Gauss 200 km; b.Fan 200 km; c.Han 200 km; d.DKK4

      表  1  不同滤波器反演的TWSA时间序列年趋势及其周期信息

      Table  1.   Annual trend of TWSA time series and its period information for different filter inversion

      滤波函数 年趋势
      (mm/a)
      周年振幅
      (mm)
      半周年振幅
      (mm)
      周年相位 半周年相位
      Gauss 200 km 8.64 90.19 26.28 232.25° 153.73°
      Fan 200 km 8.77 94.47 21.78 231.47° 150.31°
      Han 200 km 9.05 112.92 16.35 228.61° 139.31°
      DKK4 9.39 89.34 19.00 232.91° 158.46°
      下载: 导出CSV
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    • 收稿日期:  2019-06-12
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