TY - JOUR
T1 - Impacts of spatial clustering of urban land cover on land surface temperature across Köppen climate zones in the contiguous United States
AU - Wang, Chuyuan
AU - Li, Yubin
AU - Myint, Soe W.
AU - Zhao, Qunshan
AU - Wentz, Elizabeth A.
N1 - Funding Information:
This material is based upon work supported by the National Aeronautics and Space Administration under Grant No. 13-LCLUC13-2-0012 issued through the Research Opportunities in Space and Earth Science (ROSES-2013), Program Element A.2: Land Cover/Land Use Change (LCLUC13-2). Any opinions, findings, and conclusions or recommendations expressed in this article are those of the authors and do not necessarily reflect the views of the National Aeronautics and Space Administration. The authors would like to thank Dr. Karen Seto, Dr. Burak Güneralp and all the anonymous reviewers for their insightful comments and suggestions on the earlier version of this manuscript.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/12
Y1 - 2019/12
N2 - This study examines the effects of spatial clustering of urban land cover types on land surface temperature (LST). The potential impact of the background regional climate is also taken into consideration. To study this relationship, multiple cities, each representing a major Köppen climate region in the U.S., namely Portland, Los Angeles, Chicago, Denver, Kansas City, Orlando, and Phoenix, were selected. Urban land cover types were derived from the 2011 National Land Cover Database (NLCD); summer mean LST from 2011 was calculated using the Moderate Resolution Imaging Spectroradiometer (MODIS) LST products. Spatial clustering was quantified using Moran's I, and was analyzed against LST using correlation and multivariate regression analyses. The results indicate that in most climate regions, clustered impervious surfaces can elevate LST for both daytime and nighttime. The cooling effect of clustered vegetation cover was only found significant in regions with dry and warm summers, such as in Phoenix and Portland. Clustered water bodies have a strong cooling effect during the daytime but have a warming effect at night, except for cities such as Los Angeles and Phoenix, which have scant large water bodies. Furthermore, policy recommendations were put forward to suggest that reducing the spatial clustering of impervious surfaces, having more spatially clustered greenspaces, and having spatially dispersed water bodies with clustered greenspaces nearby are potential strategies to reduce urban warming in most cities in the contiguous U.S.
AB - This study examines the effects of spatial clustering of urban land cover types on land surface temperature (LST). The potential impact of the background regional climate is also taken into consideration. To study this relationship, multiple cities, each representing a major Köppen climate region in the U.S., namely Portland, Los Angeles, Chicago, Denver, Kansas City, Orlando, and Phoenix, were selected. Urban land cover types were derived from the 2011 National Land Cover Database (NLCD); summer mean LST from 2011 was calculated using the Moderate Resolution Imaging Spectroradiometer (MODIS) LST products. Spatial clustering was quantified using Moran's I, and was analyzed against LST using correlation and multivariate regression analyses. The results indicate that in most climate regions, clustered impervious surfaces can elevate LST for both daytime and nighttime. The cooling effect of clustered vegetation cover was only found significant in regions with dry and warm summers, such as in Phoenix and Portland. Clustered water bodies have a strong cooling effect during the daytime but have a warming effect at night, except for cities such as Los Angeles and Phoenix, which have scant large water bodies. Furthermore, policy recommendations were put forward to suggest that reducing the spatial clustering of impervious surfaces, having more spatially clustered greenspaces, and having spatially dispersed water bodies with clustered greenspaces nearby are potential strategies to reduce urban warming in most cities in the contiguous U.S.
KW - Köppen climate classification
KW - Land surface temperature
KW - Moran's I
KW - Spatial clustering
KW - Urban land cover
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U2 - 10.1016/j.landurbplan.2019.103668
DO - 10.1016/j.landurbplan.2019.103668
M3 - Article
AN - SCOPUS:85072553731
SN - 0169-2046
VL - 192
JO - Landscape and Urban Planning
JF - Landscape and Urban Planning
M1 - 103668
ER -