DOI: 10.1002/gbc.20017
Scopus记录号: 2-s2.0-84881069188
论文题名: Inter- and intra-annual variability of vegetation in the northern hemisphere and its association with precursory meteorological factors
作者: Myoung B ; , Choi Y ; -S ; , Hong S ; , Park S ; K
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 1 起始页码: 31
结束页码: 42
语种: 英语
英文关键词: atmosphere-vegetation linkage
; EOF analysis
; LAI interannual variability
; precipitation
; temperature
; vapor pressure deficit
; Vegetation phenology
Scopus关键词: atmosphere-vegetation linkage
; Eof analysis
; Interannual variability
; Vapor pressure deficit
; Vegetation phenology
; Advanced very high resolution radiometers (AVHRR)
; Atmospheric temperature
; Biology
; Crops
; Forestry
; Geothermal springs
; Needles
; Precipitation (chemical)
; Temperature
; Vapors
; Vegetation
; annual variation
; AVHRR
; growing season
; irrigation
; meteorology
; Northern Hemisphere
; phenology
; precipitation (climatology)
; shortwave radiation
; temperature effect
; vegetation structure
; vegetation type
; Canada
; Siberia
; United States
英文摘要: Determination of phenological variation is one of the most critical challenges in dynamic vegetation modeling, given the lack of a strong theoretical framework. Previous studies generally focused on the timing of a phenological event (e.g., bud-burst or onset of growing season) and its atmospheric prompts, but not on the interactive variations across phenological stages. This study, therefore, investigated the inter- and intra-annual variability existing in all the phenological stages and the relations of the variability with four meteorological variables (surface temperature (T s), shortwave radiation (SW), vapor pressure deficit (VPD), and precipitation (PRCP)) using a 25-year (1982-2006) dataset of leaf area index (LAI) from the Advanced Very High Resolution Radiometer (AVHRR). Our six study sites of each 4° × 4°grids (mixed forest in China, deciduous needle-leaf forest in Siberia, evergreen needle-leaf forest in western Canada, grass in Gobi, and crops in the Central United States and southeastern Europe) include various vegetation types, local climates, and land-use types in the mid-latitudes of the northern hemisphere. Empirical orthogonal function (EOF) analysis with detrended LAI anomalies identified the two leading EOF modes that account for the amplitude and phase of the monthly LAI variations. The inter-annual correlation between the principle components (PCs) of the two modes and the meteorological variables for spring and summer showed that the amplitude and phase modes (AM and PM, respectively) were affected by different dominant meteorological factors. Over most of the study regions, AM was positively correlated with PRCP and negatively with Ts, SW, and VPD, while PM was predominantly positively correlated with Ts. The contrasting responses of the two EOF modes to Ts reflect environmental limitations on plant growth such as early start of growth, but with a reduced value of maximum LAI in a year with a warm spring. In addition, insignificant correlations between AM and PRCP, as well as negative correlations between PM and PRCP, in the crop regions suggest that human interventions such as advanced irrigation systems also play a key role in vegetative activity. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77627
Appears in Collections: 气候变化事实与影响
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作者单位: New Engineering Bldg. 105-3, Ewha Womans University, Daehyun-Dong, Seodaemoon-Gu, Seoul, South Korea; Severe Storm Research Center, Ewha Womans University, Seoul, South Korea; Department of Environmental Science and Engineering, Ewha Womans University, Seoul, South Korea
Recommended Citation:
Myoung B,, Choi Y,-S,et al. Inter- and intra-annual variability of vegetation in the northern hemisphere and its association with precursory meteorological factors[J]. Global Biogeochemical Cycles,2013-01-01,27(1)