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京津冀城市群生態(tài)空間格局變化與地表溫度關系研究
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自然資源部地球觀測與時空信息科學重點實驗室開放基金項目(201913)、中國博士后科學基金面上項目(2018M641218)和中央高校基本科研業(yè)務費專項資金項目(BLX201806)


Relationship between Change of Ecological Spatial Pattern and Land Surface Temperature in Beijing-Tianjin-Hebei Urban Agglomeration
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    摘要:

    為探究京津冀城市群樹木覆蓋率(TC)、短植被覆蓋率(SV)與裸地覆比率(BG)變化趨勢及生態(tài)空間格局對地表溫度的影響,基于京津冀城市群的MODIS遙感數據,運用景觀生態(tài)學理論并結合空間計量經濟學相關原理研究了京津冀生態(tài)空間與地表溫度的格局特征,運用Pearson相關性探究了兩者的相關性,分別運用空間雙變量自相關與空間自回歸模型探究了兩者的空間相關性。結果表明:京津冀地區(qū)中部、東北部以及西南邊界地區(qū)的樹木覆蓋率呈現增長趨勢,東北、西南邊界和東部沿海地區(qū)的短植被覆蓋率呈上升趨勢,承德市西北部和南部、保定市、石家莊市、邢臺市和邯鄲市的部分區(qū)域具有土地裸露風險。提取了京津冀城市群的綠色空間和藍色空間,各樣區(qū)內藍綠空間與地表溫度的空間分布具有顯著的空間自相關性。樣區(qū)5、7位于河北省北部,林地景觀比例較高,相關性以及雙變量空間自相關性高于其他樣區(qū),這與景觀優(yōu)勢度、斑塊破碎度有關。樣區(qū)1、4生態(tài)空間比例較低,對地表溫度影響有限。景觀類型比例對地表溫度影響較大,樣區(qū)7的生態(tài)空間比例較高,并且生態(tài)空間斑塊集中連片,對地表溫度影響明顯。樣區(qū)1~7的空間滯后模型與空間誤差模型擬合效果遠優(yōu)于OLS模型。各個樣區(qū)空間誤差模型的R2大于空間滯后模型,空間誤差模型解釋變量的能力更強。各個樣區(qū)空間誤差模型的LIK值較大,AIC、SC以及模型殘差的Moran’s I值較小,空間誤差模型的擬合效果優(yōu)于空間滯后模型。

    Abstract:

    Based on MODIS remote sensing data of Beijing-Tianjin-Hebei region, using landscape ecology and related principles of spatial econometrics, the pattern characteristics of ecological space and surface temperature in Beijing-Tianjin-Hebei region were discussed, Pearson correlation was used to explore the correlation between the two, and the spatial bivariate autocorrelation and spatial autocorrelation were used to explore the spatial correlation of the two. The results showed that the forest coverage in the central, northeast and southwest borders of Beijing-Tianjin-Hebei area was increasing, the cultivated land coverage in the northeast, southwest and east coastal areas was increasing, and some areas of Chengde City in the northwest and south, Baoding City, Shijiazhuang City, Xingtai City and Handan City were at risk of land exposure. The green space or blue space in July 2018 was extracted, and the spatial distribution of ecological space and surface temperature in various areas had significant spatial autocorrelation. Sample areas 5 and 7 were located in the north of Hebei Province. The proportion of forest landscape was higher, and the correlation and bivariate spatial autocorrelation were higher than that of other sample areas, which were related to landscape dominance and patch fragmentation. Due to the low proportion of ecological space between sample area 1 and sample area 4, the impact on LST was limited. The plant had a large impact on LST image, the proportion of sample area 7 was high, and the effect of ecological space patches and concentrated patches on surface temperature was obvious. The fitting effect of the spatial lag model and the spatial error model of sample areas 1 to 7 was much better than that of OLS. R2 of the spatial error model of each sample area was greater than that of the spatial lag model, and the spatial error model had stronger ability to interpret variables. The LIK value of the spatial error model of each sample area was larger, the value of AIC, SC and Moran’s I of the model residual were smaller, and the fitting effect of the spatial error model was better than that of the spatial lag model.

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王戈,于強,YANG Di,趙曉婷,趙桂芳,岳德鵬.京津冀城市群生態(tài)空間格局變化與地表溫度關系研究[J].農業(yè)機械學報,2021,52(1):209-218. WANG Ge, YU Qiang, YANG Di, ZHAO Xiaoting, ZHAO Guifang, YUE Depeng. Relationship between Change of Ecological Spatial Pattern and Land Surface Temperature in Beijing-Tianjin-Hebei Urban Agglomeration[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(1):209-218.

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  • 收稿日期:2020-02-27
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  • 在線發(fā)布日期: 2021-01-10
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