1951年以来中国无霜期的变化趋势
宁晓菊, 张丽君, 杨群涛, 秦耀辰
Trends in the frost-free period in China from 1951 to 2012
Xiaoju NING, Lijun ZHANG, Quntao YANG, Yaochen QIN
地理学报 . 2015, (11): 1811 -1822 .  DOI: 10.11821/dlxb201511010