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Climate controls over the net carbon uptake period and amplitude of net ecosystem production in temperate and boreal ecosystems

Journal Article · · Agricultural and Forest Meteorology
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [5];  [4];  [11]
  1. Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China); Montana State University, Bozeman, MT (United States); DOE Office of Scientific and Technical Information (OSTI)
  2. Montana State University, Bozeman, MT (United States)
  3. Tsinghua University, Beijing (China); University of Oklahoma, Norman, OK (United States)
  4. Michigan State University, East Lansing, MI (United States)
  5. Chinese Academy of Sciences (CAS), Beijing (China)
  6. Forest Services of Autonomous Province of Bolzano (Italy); Free University of Bolzano (Italy)
  7. University of Innsbruck (Austria)
  8. University of Texas Rio Grande Valley, San Padre Island, TX (United States)
  9. University Federal de Lavras (Brazil)
  10. Technische University, Dresden (Germany)
  11. Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)
+ Show Author Affiliations
The seasonal and interannual variability of the terrestrial carbon cycle is regulated by the interactions of climate and ecosystem function. However, the key factors and processes determining the interannual variability of net ecosystem productivity (NEP) in different biomes are far from clear. Here in this paper, we quantified yearly anomalies of seasonal and annual NEP, net carbon uptake period (CUP), and the maximum daily NEP (NEPmax) in response to climatic variables in 24 deciduous broadleaf forest (DBF), evergreen forest (EF), and grassland (GRA) ecosystems that include at least eight years of eddy covariance observations. Over the 228 site-years studied, interannual variations in NEP were mostly explained by anomalies of CUP and NEPmax. CUP was determined by spring and autumn net carbon uptake phenology, which were sensitive to annual meteorological variability. Warmer spring temperatures led to an earlier start of net carbon uptake activity and higher spring and annual NEP values in DBF and EF, while warmer autumn temperatures in DBF, higher autumn radiation in EF, and more summer and autumn precipitation in GRA resulted in a later ending date of net carbon uptake and associated higher autumn and annual NEP. Anomalies in NEPmax s were determined by summer precipitation in DBF and GRA, and explained more than 50% of variation in summer NEP anomalies for all the three biomes. Results demonstrate the role of meteorological variability in controlling CUP and NEPmax, which in turn help describe the seasonal and interannual variability of NEP.
Research Organization:
Oregon State Univ., Corvallis, OR (United States)
Sponsoring Organization:
CAS Strategic Priority Research Program; China Scholarship Council; Midwestern Regional Center of NICCR; Ministry of Science and Technology of China; National Natural Science Foundation of China; National Science Foundation; US Department of Agriculture (USDA); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
FC02-06ER64158; FG02-04ER63911; FG02-04ER63917
OSTI ID:
1418524
Alternate ID(s):
OSTI ID: 1416191
Journal Information:
Agricultural and Forest Meteorology, Journal Name: Agricultural and Forest Meteorology Journal Issue: C Vol. 243; ISSN 0168-1923
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

54 ENVIRONMENTAL SCIENCES
climate
interannual variation
maximum carbon uptake amplitude
net carbon uptake period
net ecosystem productivity
phenology