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The results showed that the following: (1) the iterative extraction of urban built-up areas using the threshold method based on nighttime light data combined with the definition of urban built-up areas had high accuracy. (2) Additionally, we found that the start of the growing season (SOS) in Liaoning Province occurred between day 100 and day 180, while the end of the growing season (EOS) occurred between days 260 and 330. The difference in the SOS between coastal cities (i.e., Dalian, Yingkou, Panjin, Jinzhou, Huludao, and Dandong) and inland cities (i.e., Chaoyang, Fuxin, Tieling, Shenyang, Fushun, Liaoyang, Benxi, and Anshan) was 1.70 days. However, the difference in the EOS was more significant, i.e., the EOS in coastal cities occurred 4.47 days later than that in the inland cities. (3) In urban areas of different sizes, the \u2206SOS and \u2206EOS of inland cities had negative correlations with urban size. Specifically, when the urban size increased 10-fold, the \u2206SOS and \u2206EOS advanced by 10.03 and 5.71 days, respectively. In contrast, the \u2206SOS and \u2206EOS of coastal cities had positive and negative correlations with the urban size, respectively. Specifically, when urban size increased 10-fold, \u2206SOS was delayed by 11.29 days while EOS was advanced by 8.83 days.<\/jats:p>","DOI":"10.1155\/2020\/7607936","type":"journal-article","created":{"date-parts":[[2020,6,20]],"date-time":"2020-06-20T23:31:12Z","timestamp":1592695872000},"page":"1-11","source":"Crossref","is-referenced-by-count":5,"title":["Response Patterns of Vegetation Phenology along Urban-Rural Gradients in Urban Areas of Different Sizes"],"prefix":"10.1155","volume":"2020","author":[{"given":"Xue","family":"Luo","sequence":"first","affiliation":[{"name":"Human Settlements Research Center, Liaoning Normal University, Dalian 116029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8503-2383","authenticated-orcid":true,"given":"Yuqing","family":"Zhang","sequence":"additional","affiliation":[{"name":"Human Settlements Research Center, Liaoning Normal University, Dalian 116029, 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