Remote Sensing Technology and Application, Volume. 39, Issue 1, 134(2024)

Multiple Influences and Seasonal Differences of Chlorophyll-a Concentration in Southeast Coast of China based on Generalized Additive Model

Jingwei ZHANG1,2、*, Zuoqi CHEN1,2, and Hua SU1,2
Author Affiliations
  • 1Key Laboratory of Spatial Data Mining and Information Sharing of Ministry of Education,National & Local Joint Engineering Research Center of Satellite Geospatial Information Technology,Fuzhou University,Fuzhou 350108,China
  • 2The Academy of Digital China,Fuzhou University,Fuzhou 350108,China
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    Figures & Tables(15)
    Location of the southeastern coastal areas of China
    Scatter plot of nighttime light brightness and chlorophyll-a concentration of cities in the southeast coast from 2012 to 2019
    Response curves between chlorophyll-a and factors in type Ⅰ cities
    Four seasons of wind field along the southeast coast of China
    Response curves between chlorophyll-a and factors in type Ⅱ cities
    Response curves between chlorophyll-a and factors in type Ⅲ cities
    Three-dimensional effect graph of interaction between human factors and natural factors on chlorophyll-a concentration in type Ⅱ cities
    Three-dimensional effect graph of interaction between human factors and natural factors on chlorophyll-a concentration in type Ⅲ cities
    • Table 1. Statistical information of chlorophyll-a data in coastal areas of each city

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      Table 1. Statistical information of chlorophyll-a data in coastal areas of each city

      城市总像元数重叠部分像元数叶绿素a浓度平均值叶绿素a浓度标准差样本总数
      防城港9826(钦州)2.530.7793
      钦州5620(北海),26(防城港)3.070.9893
      北海14533(湛江),20(钦州)2.590.6893
      湛江40220(茂名),33(北海)2.720.4393
      茂名6519(阳江),20(湛江)1.720.5693
      阳江11626(江门),19(茂名)1.870.6193
      江门12326(珠海),26(阳江)3.461.0093
      珠海13017(中山),9(广州),9(深圳),7(香港),26(江门)4.961.7693
      中山361(香港),11(东莞),28(广州),17(珠海)6.992.9293
      广州3516(东莞),26(深圳),2(香港),28(中山),9(珠海)7.283.1893
      东莞1611(中山),16(广州),14(深圳)7.513.3493
      深圳12919(中山),16(东莞),26(广州),9(珠海),60(香港)2.160.7993
      香港1592(广州),1(中山),60(深圳),7(珠海)2.541.1593
      惠州8734(深圳),24(汕尾)0.520.5793
      汕尾16724(惠州),16(揭阳)1.530.5593
      揭阳6316(汕尾),18(汕头)1.760.6393
      汕头7718(揭阳),17(潮州)2.961.1293
      潮州4817(汕头),23(漳州)3.131.1493
      漳州18723(潮州),22(厦门)2.500.4193
      厦门5222(漳州),18(泉州)2.960.6793
      泉州15018(厦门),31(莆田)2.350.4493
      莆田10131(泉州),38(福州)3.000.5293
      福州24338(莆田),21(宁德)3.120.5693
      宁德16121(福州)3.590.7193
    • Table 2. Statistical information of nighttime light data in coastal areas of each city

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      Table 2. Statistical information of nighttime light data in coastal areas of each city

      城市总像元数夜间灯光亮度平均值夜间灯光亮度标准差样本总数
      防城港29 9870.390.1293
      钦州53 8250.330.1093
      北海17 0561.200.3493
      湛江61 2680.710.2193
      茂名57 1060.560.1993
      阳江39 5480.640.1593
      江门46 9131.330.3593
      珠海8 1305.971.4893
      中山8 8338.771.6493
      广州36 6716.831.1693
      东莞12 42813.482.5393
      深圳9 97218.383.2793
      香港5 51715.942.8693
      惠州57 5101.700.4493
      汕尾24 5941.030.5893
      揭阳26 7801.800.5893
      汕头11 0035.541.5193
      潮州15 8671.710.4593
      漳州64 6901.180.3493
      厦门8 09511.822.7993
      泉州58 0272.760.52993
      莆田20 0742.410.6393
      福州60 3262.060.4793
      宁德68 1160.430.1493
    • Table 3. Data for research

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      Table 3. Data for research

      数据产品时间分辨率空间分辨率时间跨度
      叶绿素a浓度每天4 km×4 km2012.04.01~2019.12.30
      夜间灯光亮度每月约500 m×500 m2012.04.01~2019.12.30
      海表温度每天0.011°×0.011°2012.04.01~2019.12.30
      风速每月0.25°×0.25°2012.04.01~2019.12.30
      太阳辐射每月0.25°×0.25°2012.04.01~2019.12.30
      降水每月0.25°×0.25°2012.04.01~2019.12.30
    • Table 4. GAM model fitting results of type Ⅰ cities

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      Table 4. GAM model fitting results of type Ⅰ cities

      季节R2模型解释率影响因素自由度P值贡献率
      春季0.52761.2%夜间灯光亮度5.6960.051 991.8%
      风速4.1364.5E-6***16.6%
      海表温度3.0990.002 01**10.7%
      太阳辐射2.4620.212 072.3%
      降水7.4180.107 476.5%
      夏季0.42852.4%夜间灯光亮度5.5830.100 7365.7%
      风速3.2310.022 400*6.5%
      海表温度4.4280.000 429***11.6%
      太阳辐射5.0930.164 4805.6%
      降水1.0000.805 0930.1%
      秋季0.43450.9%夜间灯光亮度1.6240.195 803.5%
      风速2.4990.002 99**9.4%
      海表温度4.0911.57E-5***17.1%
      太阳辐射4.4920.100 457.2%
      降水4.1410.098 885.9%
      冬季0.56462.1%夜间灯光亮度3.3020.085 94.3%
      风速1.5440.320 40.4%
      海表温度7.768<2E-16***39.8%
      太阳辐射2.3340.185 05.9%
      降水1.8400.278 10.9%
    • Table 5. GAM model fitting results of type Ⅱ cities

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      Table 5. GAM model fitting results of type Ⅱ cities

      季节R2模型解释率影响因素自由度P值贡献率
      春季0.53760.9%夜间灯光亮度1.0000.634 1840.1%
      风速2.970<2E-16***15.2%
      海表温度2.9800.000 101***10.1%
      太阳辐射1.0000.591 5740.5%
      降水8.7940.000 256***15%
      夏季0.68972%夜间灯光亮度1.7690.008 964 6**1.3%
      风速1.0000.193 5630.5%
      海表温度5.476<2E-16***25.4%
      太阳辐射2.0110.054 2750.9%
      降水1.1310.000 604***4.4
      秋季0.62465%夜间灯光亮度3.020.033 21*3%
      风速1.000.000 57***3.8%
      海表温度1.860.003 86**3.4%
      太阳辐射1.000.346 070.3%
      降水1.000.129 090.8%
      冬季0.6568.7%夜间灯光亮度1.0000.613 50.1%
      风速1.000<2E-16***21.9%
      海表温度1.7510.136 81.4%
      太阳辐射4.0008.39E-5***8.7%
      降水2.5370.090 52.2%
    • Table 6. GAM model fitting results of type Ⅲ cities

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      Table 6. GAM model fitting results of type Ⅲ cities

      季节R2模型解释率影响因素自由度P值贡献率
      春季0.55265%夜间灯光亮度2.5205.92E-7***33.9%
      风速8.1860.002 52**21.4%
      海表温度2.1190.108 583.1%
      太阳辐射1.7540.412 231.3%
      降水1.0000.103 672.9%
      夏季0.36544.2%夜间灯光亮度1.0000.015 5*6%
      风速1.5160.115 63.7%
      海表温度1.5600.065 74.9%
      太阳辐射2.1840.374 13.6%
      降水2.2980.078 67.3%
      秋季0.49454.9%夜间灯光亮度3.9008.83E-6***23.7%
      风速1.7250.448 12.4%
      海表温度1.7500.343 22.9%
      降水1.0000.036 1*4.5%
      冬季0.55661.7%夜间灯光亮度1.5600.406 421.3%
      风速1.0000.019 57*5%
      海表温度2.0020.001 57**8.9%
      太阳辐射1.5770.177 062%
      降水3.3490.002 32**7
    • Table 7. Results of significance test for interaction of influencing factors

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      Table 7. Results of significance test for interaction of influencing factors

      城市类型季节交互项自由度P值
      类型Ⅱ夜间灯光亮度+风速2.000<2E-16***
      夜间灯光亮度+海表温度1.000<2E-16***
      夜间灯光亮度+降水1.9080.0315*
      夜间灯光亮度+风速2.0009.65E-7***
      夜间灯光亮度+海表温度1.0000.0141*
      夜间灯光亮度+风速2.000<2E-16***
      夜间灯光亮度+太阳辐射2.8300.000153***
      类型Ⅲ夜间灯光亮度+风速2.0000.0495*
      夜间灯光亮度+风速2.0000.0135*
      夜间灯光亮度+太阳辐射2.5440.000642***
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    Jingwei ZHANG, Zuoqi CHEN, Hua SU. Multiple Influences and Seasonal Differences of Chlorophyll-a Concentration in Southeast Coast of China based on Generalized Additive Model[J]. Remote Sensing Technology and Application, 2024, 39(1): 134

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    Paper Information

    Category: Research Articles

    Received: Nov. 18, 2022

    Accepted: --

    Published Online: Jul. 22, 2024

    The Author Email: ZHANG Jingwei (1005718085@qq.com)

    DOI:10.11873/j.issn.1004-0323.2024.1.0134

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