Earlier spring leaf unfolding is a frequently observed response of plants to climate warming. Many deciduous tree species require chilling for dormancy release, and warming-related reductions in chilling may counteract the advance of leaf unfolding in response to warming. Empirical evidence for this, however, is limited to saplings or twigs in climate-controlled chambers.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/declining-global-warming-effects-phenology-spring-leaf-unfolding
[2] http://admin.indiaenvironmentportal.org.in/category/author/yongshuo-h-fu
[3] http://admin.indiaenvironmentportal.org.in/category/author/hongfang-zhao
[4] http://admin.indiaenvironmentportal.org.in/category/author/shilong-piao-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-science
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/flora
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/europe