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Non-linear response of vegetation to coherent warming over northern high latitudes

Cited 10 time in scopus
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Title
Non-linear response of vegetation to coherent warming over northern high latitudes
Other Titles
고위도 지역 온난화에 따른 식물 성장의 비선형성에 관하여
Authors
Song-Feng
Kim, Baek-Min
David Medvigy
Ho, Chang-Hoi
Su-Jong Jeong
Subject
Imaging Science & Photographic Technology
Keywords
Arctic warming; high-latitude; vegetation; Remote Sensing
Issue Date
2012
Publisher
Taylor & Francis
Citation
Song-Feng, et al. 2012. "Non-linear response of vegetation to coherent warming over northern high latitudes". Remote Sensing Letters, 4: 123-130.
Abstract
This study evaluates the large-scale changes in vegetation greenness at northern high latitudes (>60?N) using satellite-measured normalized difference vegetation index (NDVI) and station-merged temperature, precipitation and soil moisture for the period 1982?2008. During this 27-year period, although coherent warming trends were observed at most of the high latitudes, changes in the NDVI showed apparent spatial and temporal heterogeneity. In particular, changes in the hemi- spheric mean NDVI increased until 1997, but decreased thereafter. Maximum covariance analysis, which is a statistical method to detect large-scale covariability between two variables over time, reveals significant relationships between NDVI and soil moisture (and/or precipitation) in the regions of negative NDVI trends. These results further suggest that local moisture availability also plays a consider- able role in the large-scale changes in vegetation as well as coherent warming over the northern high latitudes. moisture for the period 1982?2008. During this 27-year period, although coherent warming trends were observed at most of the high latitudes, changes in the NDVI showed apparent spatial and temporal heterogeneity. In particular, changes in the hemi- spheric mean NDVI increased until 1997, but decreased thereafter. Maximum covariance analysis, which is a statistical method to detect large-scale covariability between two variables over time, reveals significant relationships between NDVI and soil moisture (and/or precipitation) in the regions of negative NDVI trends. These results further suggest that local moisture availability also plays a consider- able role in the large-scale changes in vegetation as well as coherent warming over the northern high latitudes.
URI
http://repository.kopri.re.kr/handle/201206/6372
DOI
http://dx.doi.org/10.1080/2150704X.2012.703790
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