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Altered energy partitioning across terrestrial ecosystems in the European drought year 2018 : Energy partitioning in the drought 2018

Graf, Alexander ; Klosterhalfen, Anne ; Arriga, Nicola ; Bernhofer, Christian ; Bogena, Heye ; Bornet, Frédéric ; Brüggemann, Nicolas ; Brümmer, Christian ; Buchmann, Nina and Chi, Jinshu , et al. (2020) In Philosophical Transactions of the Royal Society B: Biological Sciences 375(1810).
Abstract

Drought and heat events, such as the 2018 European drought, interact with the exchange of energy between the land surface and the atmosphere, potentially affecting albedo, sensible and latent heat fluxes, as well as CO 2 exchange. Each of these quantities may aggravate or mitigate the drought, heat, their side effects on productivity, water scarcity and global warming. We used measurements of 56 eddy covariance sites across Europe to examine the response of fluxes to extreme drought prevailing most of the year 2018 and how the response differed across various ecosystem types (forests, grasslands, croplands and peatlands). Each component of the surface radiation and energy balance observed in 2018 was compared to available data per site... (More)

Drought and heat events, such as the 2018 European drought, interact with the exchange of energy between the land surface and the atmosphere, potentially affecting albedo, sensible and latent heat fluxes, as well as CO 2 exchange. Each of these quantities may aggravate or mitigate the drought, heat, their side effects on productivity, water scarcity and global warming. We used measurements of 56 eddy covariance sites across Europe to examine the response of fluxes to extreme drought prevailing most of the year 2018 and how the response differed across various ecosystem types (forests, grasslands, croplands and peatlands). Each component of the surface radiation and energy balance observed in 2018 was compared to available data per site during a reference period 2004-2017. Based on anomalies in precipitation and reference evapotranspiration, we classified 46 sites as drought affected. These received on average 9% more solar radiation and released 32% more sensible heat to the atmosphere compared to the mean of the reference period. In general, drought decreased net CO 2 uptake by 17.8%, but did not significantly change net evapotranspiration. The response of these fluxes differed characteristically between ecosystems; in particular, the general increase in the evaporative index was strongest in peatlands and weakest in croplands. This article is part of the theme issue 'Impacts of the 2018 severe drought and heatwave in Europe: from site to continental scale'.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
eddy covariance, energy balance, evapotranspiration, heat flux, net carbon uptake, water-use efficiency
in
Philosophical Transactions of the Royal Society B: Biological Sciences
volume
375
issue
1810
article number
20190524
pages
8 pages
publisher
Royal Society Publishing
external identifiers
  • pmid:32892732
  • scopus:85090376103
ISSN
0962-8436
DOI
10.1098/rstb.2019.0524
language
English
LU publication?
yes
additional info
Funding Information: Authors thank the funders (grant IDs and particularly concerned authors/sites in parentheses) French National Research Agency ANR (ANR-11-LABX-0002-01, ANR-16-SUMF-0001-01, LabEx ARBRE, M.C.), Alexander von Humbold Stiftung (MaNiP, T.S.E.-M., M.Mi.), German Federal Ministry of Education and Research BMBF (01LN1313A, A.G.; ICOS; DE-Geb), German Federal Ministry of Food and Agriculture BMEL (ERA-NET FACCE ERA-GAS, P.G., F.S., C.Br.), German Research Foundation DFG (BE1721/23, C.Be., T.G., DE-Tha; PAK 346; FOR 1695, A.P., J.I., H.W., DE-EC2, DE-EC4; INST 186/1118-1 FUGG, A.Kn., L.S.), GIP Ecofor SOERE F-ORE-T (M.C.), Finnish Center of Excellence (307331, I.M.), Research Foundation-Flanders FWO (BE-Bra; G0H3317N, B.G.), Hainich National Park (DE-Hai), Helmholtz Association HGF (TERENO; VH-NG-821, T.S.), Horizon 2020 (696356, P.G.), ICOS-FINLAND (281255, I.M.), Kempe Foundation (SMK-1743, J.C.), Knut and Alice Wallenberg Foundation (2015.0047, M.P.), Max-Planck Institute for Biogeochemistry (DE-Geb), Russian Foundation for Basic Research RFBR (19-04-01234-a, A.V.), Swiss National Science Foundation (ICOS-CH Phase 2 20FI20_173691, M.G., N.Bu.; InnoFarm 407340_172433, N.Bu.), European Commission (SUPER-G, S.G.; RINGO, L.H.; ERA-NET Sumforest No. 606803, M.C.), Service Public de Wallonie (DGO6, 1217769, A.D.L., B.H., B.L., C.V.), SustES (CZ.02.1.01/0.0/0.0/16_019/0000797, L.Š., M.F.), CzeCOS (grant no. LM2015061, L.F., L.Š., M.F., N.K.), Swedish Research Council FORMAS (2016-01289, M.P.; 942-2015-49, J.C.) and University of Padua (CDPA148553, 2014, A.Pi.) Acknowledgements
id
d286df45-5310-4455-80b5-1c424d31e6d3
date added to LUP
2021-03-15 18:04:46
date last changed
2021-05-18 15:16:54
@article{d286df45-5310-4455-80b5-1c424d31e6d3,
  abstract     = {<p>Drought and heat events, such as the 2018 European drought, interact with the exchange of energy between the land surface and the atmosphere, potentially affecting albedo, sensible and latent heat fluxes, as well as CO 2 exchange. Each of these quantities may aggravate or mitigate the drought, heat, their side effects on productivity, water scarcity and global warming. We used measurements of 56 eddy covariance sites across Europe to examine the response of fluxes to extreme drought prevailing most of the year 2018 and how the response differed across various ecosystem types (forests, grasslands, croplands and peatlands). Each component of the surface radiation and energy balance observed in 2018 was compared to available data per site during a reference period 2004-2017. Based on anomalies in precipitation and reference evapotranspiration, we classified 46 sites as drought affected. These received on average 9% more solar radiation and released 32% more sensible heat to the atmosphere compared to the mean of the reference period. In general, drought decreased net CO 2 uptake by 17.8%, but did not significantly change net evapotranspiration. The response of these fluxes differed characteristically between ecosystems; in particular, the general increase in the evaporative index was strongest in peatlands and weakest in croplands. This article is part of the theme issue 'Impacts of the 2018 severe drought and heatwave in Europe: from site to continental scale'. </p>},
  author       = {Graf, Alexander and Klosterhalfen, Anne and Arriga, Nicola and Bernhofer, Christian and Bogena, Heye and Bornet, Frédéric and Brüggemann, Nicolas and Brümmer, Christian and Buchmann, Nina and Chi, Jinshu and Chipeaux, Christophe and Cremonese, Edoardo and Cuntz, Matthias and Dušek, Jiří and El-Madany, Tarek S. and Fares, Silvano and Fischer, Milan and Foltýnová, Lenka and Gharun, Mana and Ghiasi, Shiva and Gielen, Bert and Gottschalk, Pia and Grünwald, Thomas and Heinemann, Günther and Heinesch, Bernard and Heliasz, Michal and Holst, Jutta and Hörtnagl, Lukas and Ibrom, Andreas and Ingwersen, Joachim and Jurasinski, Gerald and Klatt, Janina and Knohl, Alexander and Koebsch, Franziska and Konopka, Jan and Korkiakoski, Mika and Kowalska, Natalia and Kremer, Pascal and Kruijt, Bart and Lafont, Sebastien and Léonard, Joël and De Ligne, Anne and Longdoz, Bernard and Loustau, Denis and Magliulo, Vincenzo and Mammarella, Ivan and Manca, Giovanni and Mauder, Matthias and Mölder, Meelis and Nilsson, Mats and Vereecken, Harry},
  issn         = {0962-8436},
  language     = {eng},
  month        = {10},
  number       = {1810},
  publisher    = {Royal Society Publishing},
  series       = {Philosophical Transactions of the Royal Society B: Biological Sciences},
  title        = {Altered energy partitioning across terrestrial ecosystems in the European drought year 2018 : Energy partitioning in the drought 2018},
  url          = {http://dx.doi.org/10.1098/rstb.2019.0524},
  doi          = {10.1098/rstb.2019.0524},
  volume       = {375},
  year         = {2020},
}