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

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Zheng Fu - , CAS - Institute of Geographical Sciences and Natural Resources Research, University of Chinese Academy of Sciences, Montana State University (Autor:in)
  • Paul C. Stoy - , Montana State University (Autor:in)
  • Yiqi Luo - , Tsinghua University, University of Oklahoma (Autor:in)
  • Jiquan Chen - , Michigan State University (Autor:in)
  • Jian Sun - , CAS - Institute of Geographical Sciences and Natural Resources Research (Autor:in)
  • Leonardo Montagnani - , Provincia autonoma di Bolzano, Libera Universita di Bolzano (Autor:in)
  • Georg Wohlfahrt - , Universität Innsbruck (Autor:in)
  • Abdullah F. Rahman - , University of Texas Rio Grande Valley (Autor:in)
  • Serge Rambal - , Université de Montpellier, Universidade Federal de Lavras (Autor:in)
  • Christian Bernhofer - , Professur für Meteorologie (Autor:in)
  • Jinsong Wang - , CAS - Institute of Geographical Sciences and Natural Resources Research (Autor:in)
  • Gabriela Shirkey - , Michigan State University (Autor:in)
  • Shuli Niu - , CAS - Institute of Geographical Sciences and Natural Resources Research, University of Chinese Academy of Sciences (Autor:in)

Abstract

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, 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.

Details

OriginalspracheEnglisch
Seiten (von - bis)9-18
Seitenumfang10
FachzeitschriftAgricultural and forest meteorology
Jahrgang243
PublikationsstatusVeröffentlicht - 15 Sept. 2017
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • Climate, Interannual variation, Maximum carbon uptake amplitude, Net carbon uptake period, Net ecosystem productivity, Phenology