globalchange  > 气候变化与战略
DOI: 10.1175/JCLI-D-18-0381.1
Scopus ID: 2-s2.0-85060974691
Global NDVI patterns in response to atmospheric water vapor anomalies over the Indo-Pacific warm pool during April-June
Author: Wang Z.; Huang M.; Wang R.; Wang S.; Liu X.; Xie X.; Liu Z.; Gong H.; Hao M.
Source Publication: Journal of Climate
ISSN: 8948755
Publishing Year: 2019
Volume: 32, Issue:4
pages begin: 1167
pages end: 1180
Language: 英语
Keyword: Atmosphere-land interaction ; Biosphere-atmosphere interaction ; Ecosystem effects ; Geographic information systems (GIS) ; Vegetation-atmosphere interactions
Scopus Keyword: Geographic information systems ; Moisture ; Oceanography ; Vegetation ; Atmosphere-land interactions ; Atmospheric water vapor ; Biosphere-atmosphere interactions ; Ecosystem effects ; Southern Hemisphere ; Spatial correlations ; Terrestrial vegetation ; Vegetation-atmosphere interactions ; Water vapor
English Abstract: Vertically integrated atmospheric water vapor (VIWV) over the Indo-Pacific warm pool (IPWP) indirectly affects terrestrial vegetation growth (TVG) patterns through atmospheric water vapor transmission. However, their linkages and mechanisms are poorly understood. This study intends to understand the contributions of VIWV IPWP to TVG and the mechanisms by which VIWV IPWP impacts TVG. Combining monthly SST, VIWV, and NDVI data from 1982 to 2015, the linkage between VIWV IPWP and NDVI is investigated during April-June (AMJ). A strong correlation between VIWV IPWP and NDVI suggests that VIWV IPWP is an important factor affecting TVG.Acomposite analysis of VIWV IPWP anomalies and their relation to NDVI patterns shows that VIWV IPWP positively influences the NDVI of 68.1% of global green land during high- VIWV IPWP years but negatively influences 74.7% in low years. Corresponding to these results, during high- VIWV IPWP years, the warm and humid terrestrial climate conditions improved TVG by 9% and 2% in the Northern and Southern Hemispheres, respectively, but cold and dry conditions inhibited TVG for both hemispheres during the low years. Additionally, strong spatial correlations betweenVIWV IPWP and precipitation imply that VIWV IPWP affects the spatial-temporal pattern of precipitation. There is a stronger interaction between the Pacific north-south ridge and the two land troughs during high-VIWV IPWP years than during low-VIWV IPWP years. The zonally averaged wind at 850 hPa and VIWV results indicate that, during high-VIWV IPWP years, the enhanced wind from the ocean brings more atmospheric water vapor to land, increasing the probability of precipitation and resulting in moist climate conditions that promote AMJ vegetation growth. In brief, VIWV IPWP indirectly induces vegetation growth by affecting the distributions of terrestrial VIWV and precipitation. © 2019 American Meteorological Society.
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Document Type: 期刊论文
Appears in Collections:气候变化与战略

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Recommended Citation:
Wang Z.,Huang M.,Wang R.,et al. Global NDVI patterns in response to atmospheric water vapor anomalies over the Indo-Pacific warm pool during April-June[J]. Journal of Climate,2019-01-01,32(4)
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