新疆天山北坡经济带主要城市群热岛效应对植被物候的影响

doi:10.19741/j.issn.1673-4831.2021.0675

摘要/Abstract

摘要： 随着城市化进程的加快,城市热岛效应对植被物候的影响受到更多关注。采用MODIS数据和产品(MOD11A2、MCD12Q2和MOD13Q1),并结合其他相关数据分析天山北坡经济带主要城市群--乌鲁木齐-昌吉、石河子-玛纳斯和乌苏-克拉玛依-奎屯区域城市热岛效应和植被物候时空分布特征以及两者之间的关系。结果表明,3个主要城市群中乌鲁木齐-昌吉区域城市热岛强度(UHII)最为明显,热岛强度范围为0.39~2.49℃,整体表现为夜晚热岛强度高于白天。沿城乡梯度方向分布的植被物候具有明显差异性,即城市植被生长开始期(SOS)早于郊区和乡村,植被生长结束期(EOS)晚于郊区和乡村,植被生长季(GSL)长于郊区和乡村。其中,乌鲁木齐-昌吉区域植被SOS最早,EOS最晚,GSL最长。沿城乡梯度分布的植被物候与城市热岛强度呈显著相关性。其中,UHII与△SOS呈显著负相关,与△EOS和△GSL呈高度正相关。夜晚UHII对植被物候影响更明显。研究结果有助于更深入认识天山北坡经济带沿城乡梯度分布的植被物候对城市热岛效应的影响,也可以为改善天山北坡经济带城市群生态环境提供理论依据和参考。

关键词: 新疆天山北坡经济带, 城市群, 城市热岛效应, 城市热岛强度, 植被物候

Abstract: With the accelerating of urbanization, the impact of urban heat island effect on vegetation phenology is receiving more attention. MODIS data and products (MOD11A2, MCD12Q2, MOD13Q1) were used in combination with other related data to analyze the urban heat island effect and spatial and temporal distribution characteristics of vegetation phenology in the Urumqi-Changji, Shihezi-Manas, and Wusu-Kramay-Kuidun regions. In addition, the major urban clusters of the Tianshan Northslope Economic Belt and the relationship between them were analyzed. The results of the study show that the urban heat island intensity (UHII) was most pronounced in the Urumqi-Changji region among the three major urban agglomerations, with a range of 0.39-2.49℃. The overall performance show that the heat island intensity at night was higher than that during the day. The vegetation phenology distribution along the urban-rural gradient direction showed obvious differences. Start of growing season (SOS) was earlier, end of growing season (EOS) was later, and the vegetation growth season (GSL) was longer in urban than in suburban and rural areas. Among them, the vegetation in the Urumqi-Changji region had the earliest SOS, the latest EOS, and the longest GSL. The vegetation distribution phenology along the urban-rural gradient was significantly correlated with UHII, which showed a significant negative correlation with △SOS and a high positive correlation with △EOS and △GSL. The effect of UHII on vegetation phenology was more obvious at night. The results of this study are helpful in understanding the influence of vegetation phenology on urban heat island effect along the urban-rural gradient in the Tianshan Northslope Economic Belt and can also provide a theoretical basis and reference for improving the ecological environment of urban clusters in this economic zone.

Key words: the Tianshan Northslope Economic Belt, city clusters, urban heat island effect, urban heat island intensity, vegetation phenology

中图分类号:

古丽拜合热姆·艾合麦提, 昝梅. 新疆天山北坡经济带主要城市群热岛效应对植被物候的影响[J]. 生态与农村环境学报, 2022, 38(7): 872-881.

GULBAKRAM·Ahmed, ZAN Mei. The Influence of Heat Island Effect on Vegetation Phenology in Major Urban Clusters in the Tianshan Northslope Economic Belt of Xinjiang[J]. Journal of Ecology and Rural Environment, 2022, 38(7): 872-881.

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