DOI: 10.1007/s10584-016-1730-1
Scopus记录号: 2-s2.0-84976521901
论文题名: The El Niño – La Niña cycle and recent trends in supply and demand of net primary productivity in African drylands
作者: Abdi A.M. ; Vrieling A. ; Yengoh G.T. ; Anyamba A. ; Seaquist J.W. ; Ummenhofer C.C. ; Ardö J.
刊名: Climatic Change
ISSN: 0165-0009
EISSN: 1573-1480
出版年: 2016
卷: 138, 期: 2018-01-02 起始页码: 111
结束页码: 125
语种: 英语
英文关键词: Climate variability
; Drylands
; El Niño-southern oscillation
; Net primary productivity
; Sub-Saharan Africa
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate change
; Economics
; Ecosystems
; Nickel
; Oceanography
; Photosynthesis
; Phytoplankton
; Population statistics
; Surface waters
; Climate variability
; Dry land
; Net primary productivity
; Southern oscillation
; Sub-saharan africa
; Climatology
; annual variation
; climate change
; demand analysis
; dryland farming
; El Nino
; El Nino-Southern Oscillation
; La Nina
; net primary production
; sea surface temperature
; United Nations
; urban area
; Southern Africa
; Sub-Saharan Africa
英文摘要: Inter-annual climatic variability over a large portion of sub-Saharan Africa is under the influence of the El Niño-Southern Oscillation (ENSO). Extreme variability in climate is a threat to rural livelihoods in sub-Saharan Africa, yet the role of ENSO in the balance between supply and demand of net primary productivity (NPP) over this region is unclear. Here, we analyze the impact of ENSO on this balance in a spatially explicit framework using gridded population data from the WorldPop project, satellite-derived data on NPP supply, and statistical data from the United Nations. Our analyses demonstrate that between 2000 and 2013 fluctuations in the supply of NPP associated with moderate ENSO events average ± 2.8 g C m−2 yr.−1 across sub-Saharan drylands. The greatest sensitivity is in arid Southern Africa where a + 1 °C change in the Niño-3.4 sea surface temperature index is associated with a mean change in NPP supply of −6.6 g C m−2 yr.−1. Concurrently, the population-driven trend in NPP demand averages 3.5 g C m−2 yr.−1 over the entire region with densely populated urban areas exhibiting the highest mean demand for NPP. Our findings highlight the importance of accounting for the role ENSO plays in modulating the balance between supply and demand of NPP in sub-Saharan drylands. An important implication of these findings is that increase in NPP demand for socio-economic metabolism must be taken into account within the context of climate-modulated supply. © 2016, Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/84231
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, Lund, Sweden; Faculty of Geo-information Science and Earth Observation, University of Twente, P.O. Box 217, Enschede, Netherlands; Lund University Center for Sustainability Studies, Lund, Sweden; Goddard Space Flight Center, Biospheric Sciences Laboratory, National Aeronautics and Space Administration, Greenbelt, MD, United States; Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Recommended Citation:
Abdi A.M.,Vrieling A.,Yengoh G.T.,et al. The El Niño – La Niña cycle and recent trends in supply and demand of net primary productivity in African drylands[J]. Climatic Change,2016-01-01,138(2018-01-02)