Recent spring phenology shifts in western Central Europe based on multiscale observations

物候学 归一化差异植被指数 弹簧(装置) 生长季节 气候学 环境科学 原位 句号(音乐) 植被(病理学) 自然地理学 气候变化 地理 大气科学 生态学 生物 气象学 地质学 机械工程 医学 物理 病理 声学 工程类
作者
Yongshuo H. Fu,Shilong Piao,Maarten Op de Beeck,Nan Cong,Hongfang Zhao,Yuan Zhang,Annette Menzel,Ivan A. Janssens
出处
期刊:Global Ecology and Biogeography [Wiley]
卷期号:23 (11): 1255-1263 被引量:243
标识
DOI:10.1111/geb.12210
摘要

Abstract Aim Although numerous studies have reported advanced N orthern H emisphere spring phenology since the 1980s, recent studies based on remote sensing have reported a reversal or deceleration of this trend. This study aimed (1) to fully understand recent spring phenology shifts using both in situ observations and satellite‐based normalized difference vegetation index ( NDVI ) datasets, and (2) to test whether the NDVI methods capture the trends observed in situ. Location W estern C entral E urope. Methods Temporal spring phenology trends (leaf unfolding dates) were examined using 1,001,678 in situ observations of 31 plant species at 3984 stations, as well as NDVI ‐based start‐of‐season dates, obtained using five different methods, across the pixels that included the phenology stations. Results In situ and NDVI observations both indicated that spring phenology significantly advanced during the period 1982–2011 at an average rate of −0.45 days yr −1 . This trend was not uniform across the period and significantly weakened over the period 2000–2011. Furthermore, opposite trends were found between in situ and NDVI observations over the period 2000–2011. Averaged over all species, the in situ observations indicated a slower but still advancing trend for leaf unfolding, whereas the NDVI series showed a delayed spring phenology. Main conclusions The recent trend reversal in the advancement of spring phenology in western C entral E urope is likely to be related to the response of early spring species to the cooling trend in late winter. In contrast, late spring species continued to exhibit advanced leaf unfolding, which is consistent with the warming trend during spring months. Because remote sensing does not distinguish between species, the signal of growing‐season onset may only reflect the phenological dynamics of these earliest species in the pixel, even though most species still exhibit advancing trends.
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