Quantifying albedo impact and radiative forcing of management practices in European wheat cropping systems

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Ke Yu - , Université de Versailles Saint-Quentin-en-Yvelines (Autor:in)
  • Yang Su - , Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, Ecole Normale Superieure (Autor:in)
  • Philippe Ciais - , Université de Versailles Saint-Quentin-en-Yvelines (Autor:in)
  • Ronny Lauerwald - , Université Paris-Saclay, Université libre de Bruxelles (ULB) (Autor:in)
  • Eric Ceschia - , Université de Toulouse (Autor:in)
  • David Makowski - , Université Paris-Saclay (Autor:in)
  • Yidi Xu - , Université de Versailles Saint-Quentin-en-Yvelines (Autor:in)
  • Ezzeddine Abbessi - , Université de Versailles Saint-Quentin-en-Yvelines (Autor:in)
  • Hassan Bazzi - , Université Paris-Saclay, Atos France (Autor:in)
  • Tiphaine Tallec - , Université de Toulouse (Autor:in)
  • Aurore Brut - , Université de Toulouse (Autor:in)
  • Bernard Heinesch - , University of Liege (Autor:in)
  • Christian Brümmer - , Johann Heinrich von Thunen Institute (Autor:in)
  • Marius Schmidt - , Forschungszentrum Jülich (Autor:in)
  • Manuel Acosta - , Global Change Research Institute CAS (Autor:in)
  • Pauline Buysse - , Université Paris-Saclay (Autor:in)
  • Thomas Gruenwald - , Professur für Meteorologie (Autor:in)
  • Daniel S. Goll - , Université de Versailles Saint-Quentin-en-Yvelines (Autor:in)

Abstract

Management practices that increase the surface albedo of cultivated land could mitigate climate change, with similar effectiveness to practices that reduce greenhouse gas emissions or favor natural CO2 sequestration. Yet, the efficiency of such practices is barely quantified. In this study, we quantified the impacts of seven different management practices on the surface albedo of winter wheat fields (nitrogen fertilizer, herbicide, fungicide, sowing, harvest, tillage, and crop residues) by analyzing observed daily albedo dynamics from eight European flux-tower sites with interpretable machine learning. We found that management practices have significant influences on surface albedo dynamics compared with climate and soil conditions. The nitrogen fertilizer application has the largest effect among the seven practices as it increases surface albedo by 0.015 ± 0.004 during the first two months after application, corresponding to a radiative forcing of −4.39 ± 1.22 W m−2. Herbicide induces a modest albedo decrease of 0.005 ± 0.002 over 150 d after application by killing weeds in the fallow period only, resulting in a magnitude of radiative forcing of 1.33 ± 1.06 W m−2 which is higher than radiative forcing of other practices in the same period. The substantial temporal evolution of the albedo impacts of management practices increases uncertainties in the estimated albedo-mediated climate impacts of management practices. Although these albedo effects are smaller than published estimates of the greenhouse gas-mediated biogeochemical practices, they are nevertheless significant and should thus be accounted for in climate impact assessments.

Details

OriginalspracheEnglisch
Aufsatznummer074042
FachzeitschriftEnvironmental Research Letters
Jahrgang19
Ausgabenummer7
PublikationsstatusVeröffentlicht - 1 Juli 2024
Peer-Review-StatusJa

Externe IDs

Scopus 85197345030
ORCID /0000-0003-2263-0073/work/163765950

Schlagworte

Schlagwörter

  • management practices, radiative forcing, surface albedo, temporal evolution