DOI: 10.1002/2017GB005658
Scopus记录号: 2-s2.0-85028346343
论文题名: Complex terrain influences ecosystem carbon responses to temperature and precipitation
作者: Reyes W ; M ; , Epstein H ; E ; , Li X ; , McGlynn B ; L ; , Riveros-Iregui D ; A ; , Emanuel R ; E
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期: 8 起始页码: 1306
结束页码: 1317
语种: 英语
英文关键词: carbon cycle
; climate change
; complex terrain
; ecosystem responses to climate
; land-atmosphere interactions
; landscape ecology
Scopus关键词: air temperature
; air-soil interaction
; carbon cycle
; climate change
; climate effect
; complex terrain
; conceptual framework
; ecosystem modeling
; ecosystem response
; landscape ecology
; precipitation (climatology)
; terrestrial ecosystem
; United States
英文摘要: Terrestrial ecosystem responses to temperature and precipitation have major implications for the global carbon cycle. Case studies demonstrate that complex terrain, which accounts for more than 50% of Earth's land surface, can affect ecological processes associated with land-atmosphere carbon fluxes. However, no studies have addressed the role of complex terrain in mediating ecophysiological responses of land-atmosphere carbon fluxes to climate variables. We synthesized data from AmeriFlux towers and found that for sites in complex terrain, responses of ecosystem CO2 fluxes to temperature and precipitation are organized according to terrain slope and drainage area, variables associated with water and energy availability. Specifically, we found that for tower sites in complex terrain, mean topographic slope and drainage area surrounding the tower explained between 51% and 78% of site-to-site variation in the response of CO2 fluxes to temperature and precipitation depending on the time scale. We found no such organization among sites in flat terrain, even though their flux responses exhibited similar ranges. These results challenge prevailing conceptual framework in terrestrial ecosystem modeling that assumes that CO2 fluxes derive from vertical soil-plant-climate interactions. We conclude that the terrain in which ecosystems are situated can also have important influences on CO2 responses to temperature and precipitation. This work has implications for about 14% of the total land area of the conterminous U.S. This area is considered topographically complex and contributes to approximately 15% of gross ecosystem carbon production in the conterminous U.S. ©2017. 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/77715
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States; Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States; Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE, United States; Nicholas School of the Environment, Duke University, Durham, NC, United States; Department of Geography, University of North Carolina, Chapel Hill, NC, United States
Recommended Citation:
Reyes W,M,, Epstein H,et al. Complex terrain influences ecosystem carbon responses to temperature and precipitation[J]. Global Biogeochemical Cycles,2017-01-01,31(8)