A Geometric Model to Simulate Urban Thermal Anisotropy in Simplified Dense Neighborhoods (GUTA-Dense)
A Geometric Model to Simulate Urban Thermal Anisotropy in Simplified Dense Neighborhoods (GUTA-Dense)
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模拟简化密集社区（GUTA-Dense）中城市热各向异性的几何模型
DOI：
10.1109/tgrs.2019.2904871
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发表时间：
2019-08
影响因子：
8.2
通讯作者：
Yunhao Chen
中科院分区：
文献类型：
--
作者：
D;an Wang;Yunhao Chen
由于建筑物的三维结构和温度分布的不均匀性，遥感观测的城市表面温度随观测方向而变化。以前的模型，GUTA-osg，开发来模拟城市热各向异性（UTA）在简化的街区。然而，该模型失败的计划面积分数<inline-formula><tex-math notation="LaTeX">$\lambda _{p}> 0.3$</tex-math></inline-formula>和纵横比<inline-formula><tex-math notation="LaTeX">$h/w > 2$</tex-math></inline-formula>的社区。在本文中，一个限制的变化的组成部分，与UTA是强加在GUTA-osg和一个新的几何模型推导出模拟UTA在大视角天顶角（VZA）的高密度街区（GUTA-dense）。这两种几何模型具有统一的结构，因此它们的组合可以用于反演目的。使用3-D离散各向异性辐射传输（DART）模型的评估表明，使用的GUTA密集模型有助于获得可靠的组件的温度差异，从方向温度在高度密集的街区。根据这些局限性，推导出了GUTA稠密模型适用的VZAs和城市几何形状。<inline-formula><tex-math notation="LaTeX">在h/w_{\text {3D}} > 2$</tex-math></inline-formula>的稠密邻域内，大于50°的VZA的热各向异性应结合GUTA-osg和GUTA-dense模型进行模拟。<inline-formula><tex-math notation="LaTeX">$h/w_{\text {3D}}$</tex-math></inline-formula>越大，则需要GUTA密集模型的VZA越低。可变的建筑物高度往往会降低模型的准确性，因为屋顶开始有助于热各向异性。发射率的方向性是在下一步对远程观测亮温的角度变化进行建模时需要考虑的另一个因素。
Remotely observed urban surface temperature varies with viewing direction due to the 3-D structure of buildings and heterogeneous temperature distributions. A previous model, GUTA-osg, was developed to simulate urban thermal anisotropy (UTA) in simplified neighborhoods. However, this model fails in neighborhoods with plan area fraction <inline-formula> <tex-math notation="LaTeX">$\lambda _{p}> 0.3$ </tex-math></inline-formula> and aspect ratio <inline-formula> <tex-math notation="LaTeX">$h/w > 2$ </tex-math></inline-formula>. In this paper, a limitation of the variation of component fractions that are in relation with UTA is imposed on GUTA-osg and a new geometric model is derived to simulate UTA at large view zenith angles (VZA) for high-density neighborhoods (GUTA-dense). The two geometric models have a unified structure, and thus the combination of them can be used for inversion purposes. Evaluation using the 3-D discrete anisotropic radiative transfer (DART) model shows that the use of the GUTA-dense model helps obtain reliable component temperature differences from directional temperatures in highly dense neighborhoods. According to the limitations, the applicable VZAs and urban geometries of the GUTA-dense model are derived. In dense neighborhoods with <inline-formula> <tex-math notation="LaTeX">$h/w_{\text {3D}} > 2$ </tex-math></inline-formula>, thermal anisotropy for VZAs greater than 50° should be simulated by combining the GUTA-osg and GUTA-dense models. The larger the <inline-formula> <tex-math notation="LaTeX">$h/w_{\text {3D}}$ </tex-math></inline-formula>, the lower is the VZA where the GUTA-dense model is necessary. Variable building height tends to decrease model accuracy because roofs start to contribute to thermal anisotropy. The directionality of emissivity is another factor that needs to be considered in the next step to model the angular variation of remotely observed brightness temperature.
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影响因子：
13.5
作者：
William Morrison;S. Kotthaus;C. Grimmond;A. Inagaki;T. Yin;J. Gastellu-Etchegorry;M. Kanda;C. Me
通讯作者：
William Morrison;S. Kotthaus;C. Grimmond;A. Inagaki;T. Yin;J. Gastellu-Etchegorry;M. Kanda;C. Me
模拟稀疏城市表面热各向异性的几何模型（GUTA-稀疏）
影响因子：
13.5
作者：
Wang D;an;Chen Yunhao;Zhan Wenfeng
通讯作者：
Zhan Wenfeng
模拟简化社区的城市热各向异性的几何模型
影响因子：
8.2
作者：
Wang D;an;Chen Yunhao;Cui Yanhui;Sun Hao
通讯作者：
Sun Hao
影响因子：
5.2
作者：
K. Vinnikov;Yunyue Yu;M. Goldberg;D. Tarpley;P. Romanov;I. Laszlo;Ming Chen
通讯作者：
K. Vinnikov;Yunyue Yu;M. Goldberg;D. Tarpley;P. Romanov;I. Laszlo;Ming Chen
DOI：
10.1109/jstars.2011.2168195
发表时间：
2012-02-01
影响因子：
5.5
作者：
Huang, Xin;Zhang, Liangpei
通讯作者：
Zhang, Liangpei