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首页> 外文期刊>Science of the total environment >Variability and role of long-wave radiation fluxes in the formation of net radiation and thermal features of grassy and bare soil active surfaces in Wroclaw
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Variability and role of long-wave radiation fluxes in the formation of net radiation and thermal features of grassy and bare soil active surfaces in Wroclaw

机译：长波辐射通量在弗罗茨瓦夫净辐射和热特征形成中长波辐射通量的变异性和作用

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摘要

The paper examines the variability of long-wave radiation fluxes in two contrasting types of urban active surfaces - grassy surface and surface without plants (bare soil) in Wroclaw (Poland) within a 12-year period (August 2007-July 2019). The study used net radiation and heat balance formulas to calculate the share of individual radiation fluxes in these balances, and then utilized the Stefan-Boltzmann formula to calculate the effective temperatures of researched surfaces. The analysis showed the temporal variability of these fluxes against the background of weather and climatic conditions and in relation to the variability of short-wave radiation fluxes. The role of long-wave radiation fluxes in forming net radiation was examined in detail to show the buffering role of vegetation surfaces regarding the variability of solar radiation fluxes and their heat effects. The mean monthly values of outgoing long-wave radiation fluxes change from 309.0 W-m~(-2) for bare soil, 309.8 W·m~(-2) for grassy surface, and 288.8 W·m~(-2) for downward atmospheric radiation to respectively 435.8,425.0 and 369.4 W·m~(-2) in July. The coefficient of variability for long-wave radiation daily fluxes are approximately one order of magnitude lower than for the short-wave radiation. The differences between values of long-wave radiation fluxes for bare soil and grassy surfaces vary from slight negative values in winter to relatively sizable positive values during the vegetation period (March-October). The weakening of the buffering effect for grassy surface and how air temperature then changes considerably compared to the effective temperature of the active surfaces were explained using the dry summer period of August 2015 as example. The obtained results are important, as they provide empirical arguments for urban planning to extend plant areas' share in big cities as well as to introduce there a friendly environmental system of irrigation in these areas using renewable solar energy.
机译：本文在12年期间（2007年8月至7月）内（2019年8月至7月），探讨了两种对比类型的城市活性表面 - 草地活性表面的长波辐射通量 - 草地和表面（裸露土壤）（波兰）（2007年8月至2019年7月）。该研究使用净辐射和热平衡公式来计算这些余量中各个辐射通量的份额，然后利用Stefan-Boltzmann公式来计算研究表面的有效温度。该分析显示了这些势态的时间可变性，以防止天气和气候条件以及与短波辐射通量的可变性有关。详细研究了长波辐射通量在形成净辐射中的作用，以显示植被表面关于太阳辐射助焊剂变异性的缓冲作用及其热效应。传出的长波辐射通量的平均每月值从309.0 Wm〜（-2）变化为裸土，309.8W·m〜（-2），用于向下大气的288.8 w·m〜（-2） 7月份辐射分别为435.8,425.0和369.4 W·m〜（2）。长波辐射日常助熔剂的变异系数大约比对于短波辐射的数量级。裸土和草地的长波辐射通量值之间的差异在冬季（3月至10月）期间从冬季略微负值到较大的阳性值不同。对于草地表面的缓冲效果和空气温度的弱化随后与活性表面的有效温度相比，使用2015年8月的干燥夏季解释了活性表面的有效温度。所获得的结果很重要，因为它们为城市规划提供了对大城市的股市份额的实证论据，以及使用可再生太阳能的这些地区有友好的环境制度。

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  • 来源
    《Science of the total environment》 |2020年第10期|141192.1-141192.12|共12页
  • 作者

    Krystyna Brys; Tadeusz Brys; Hanna Ojrzynska; Marderos Ara Sayegh; Arkadiusz Glogowski;

  • 作者单位

    Institute of Environmental Protection and Development Faculty of Environmental Engineering and Geodesy Wroclaw University of Environmental and Life Science pl. Grunwaldzki 24 50-363 Wroclaw Poland;

    Polish Geophysical Society. Wroclaw Division pl. Grunwaldzki 24 50-363 Wroclaw Poland;

    Institute of Geography and Regional Development Faculty of Earth Sciences and Environmental Management Wroclaw University pl. Uniwersytecki 1 50-137 Wroclaw. Poland;

    Faculty of Environmental Engineering Wroclaw University of Science and Technology ul. Norwida 4/6 50-337 Wroclaw Poland;

    5Institute of Environmental Protection and Development Faculty of Environmental Engineering and Geodesy Wroclaw University of Environmental and Life Science pl. Grunwaldzki 24 50-363 Wroclaw Poland;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Variability; Long-wave radiation fluxes; Net radiation; Active surface; Urban area; Buffer effect;

    机译：变化性;长波辐射助焊剂;净辐射;活性表面;市区;缓冲效果;

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