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DOI10.1088/1748-9326/aa5b3a
Detecting spatiotemporal changes of peak foliage coloration in deciduous and mixedforests across the Central and Eastern United States
Liu, Lingling1; Zhang, Xiaoyang1,2; Yu, Yunyue3; Donnelly, Alison4
2017-02-01
发表期刊ENVIRONMENTAL RESEARCH LETTERS
ISSN1748-9326
出版年2017
卷号12期号:2
文章类型Article
语种英语
国家USA
英文摘要

The timing of fall foliage coloration, especially peak coloration, is of great importance to the climate change research community as it has implications for carbon storage in forests. However, its long-term variation and response to climate change are poorly understood. To address this issue, we examined the long-term trends and breakpoints in satellite derived peak coloration onset from 1982 to 2014 using an innovative approach that combines Singular Spectrum Analysis (SSA) with Breaks for Additive Seasonal and Trend (BFAST). The peak coloration trend was then evaluated using both field foliage coloration observations and flux tower measurements. Finally, interannual changes in peak coloration onset were correlated with temperature and precipitation variation. Results showed that temporal trends in satellite-derived peak coloration onset were comparable with both field observations and flux tower measurements of gross primary productivity. Specifically, a breakpoint in long-term peak coloration onset was detected in 25% of pixels which were mainly distributed at latitudes north of 37 degrees N. The breakpoint tended to occur between 1998 and 2004. Peak coloration onset was delayed before the breakpoint while it was transformed to an early trend after the breakpoint in nearly all pixels. The remaining 75% of pixels exhibited monotonic trends, 35% of which revealed a late trend and 40% an early trend. The results indicate that the onset of peak coloration experienced a late trend during the 1980s and 1990s in most deciduous and mixed forests. However, the trend was reversed during the most recent decade when the timing of peak coloration became earlier. The onset of peak coloration was significantly correlated with late summer and autumn temperature in 55.5% of pixels from 1982 to 2014. This pattern of temperature impacts was also verified using field observations and flux tower measurements. In the remaining 44.5% of pixels, 12.2% of pixels showed significantly positive correlation between the onset of peak coloration and cumulative precipitation during late summer and autumn period from 1982 to 2014. Our findings can improve understanding of the impact of changes in autumn phenology on carbon uptake in forests, which in turn facilitate more reliable measures of carbon dynamics in vegetation-climate interactions models.


英文关键词peak coloration long-term trend satellite data flux data field observation temperature Singular Spectrum Analysis
领域气候变化
收录类别SCI-E
WOS记录号WOS:000395633000001
WOS关键词SINGULAR-SPECTRUM ANALYSIS ; ENHANCED VEGETATION INDEX ; LAND-SURFACE PHENOLOGY ; IMAGE TIME-SERIES ; CLIMATE-CHANGE ; SPRING PHENOLOGY ; GROWING-SEASON ; SATELLITE DATA ; AUTUMN PHENOLOGY ; TIBETAN PLATEAU
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/37557
专题气候变化
作者单位1.South Dakota State Univ, GSCE, 1021 Medary Ave, Brookings, SD 57007 USA;
2.South Dakota State Univ, Dept Geog, Brookings, SD 57007 USA;
3.NOAA NESDIS STAR, 5200 Auth Rd, Camp Springs, MD 20746 USA;
4.Univ Wisconsin Milwaukee, Dept Geog, Milwaukee, WI 53201 USA
推荐引用方式
GB/T 7714
Liu, Lingling,Zhang, Xiaoyang,Yu, Yunyue,et al. Detecting spatiotemporal changes of peak foliage coloration in deciduous and mixedforests across the Central and Eastern United States[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(2).
APA Liu, Lingling,Zhang, Xiaoyang,Yu, Yunyue,&Donnelly, Alison.(2017).Detecting spatiotemporal changes of peak foliage coloration in deciduous and mixedforests across the Central and Eastern United States.ENVIRONMENTAL RESEARCH LETTERS,12(2).
MLA Liu, Lingling,et al."Detecting spatiotemporal changes of peak foliage coloration in deciduous and mixedforests across the Central and Eastern United States".ENVIRONMENTAL RESEARCH LETTERS 12.2(2017).
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