Warmer spring alleviated the impacts of 2018 European summer heatwave and drought on vegetation photosynthesis

Authors:Wang, SonghanZhang, YongguangJu, WeiminPorcar-Castell, AlbertYe, ShanshanZhang, ZhaoyingBruemmer, ChristianUrbaniak, MarekMammarella, IvanJuszczak, RadoslawBoersma, K. Folkert

Source:AGRICULTURAL AND FOREST METEOROLOGY

Volume:295

DOI:10.1016/j.agrformet.2020.108195

Published:2020

Document Type:Article

Abstract:Future projections of climate extremes are expected to become more frequent. Parts of Europe experienced an extensive heatwave and drought during 2018. However, its impacts on terrestrial carbon cycle remain elusive. Here we investigated the vegetation responses to the heatwave and drought during 2018 based on satellite solar-induced chlorophyll fluorescence (SIF) and near-infrared reflectance (NIRv) data, which were used to estimate gross primary productivity (GPP). Results showed that there were no significant (p= 0.60) reductions in GPP across most of Europe during April-August of 2018. The higher temperatures in spring enhanced vegetation GPP, largely alleviated the negative impacts of heatwave and drought on vegetation photosynthesis during the subsequent summer, which resulted in evident compensation effects. Concurrently, warmer spring also had lagged effects by diminishing soil moisture, accompanied by scarce precipitation, leading to water stress on plant growth during summer. This observation-based study highlights the need for more considerations of seasonal compensation and lagged effects on the interactions between climate extreme events and biosphere.

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Reprint Address:Zhang, YG (corresponding author), Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210023, Peoples R China.; Zhang, YG (corresponding author), Nanjing Univ, Sch Geog & Ocean Sci, Jiangsu Prov Key Lab Geog Informat Technol, Minist Nat Resources,Key Lab Land Satellite Remot, Nanjing 210023, Jiangsu, Peoples R China.; Zhang, YG (corresponding author), Collaborat Innovat Ctr Novel Software Technol & I, Nanjing 210023, Peoples R China.

Addresses:[Wang, Songhan; Zhang, Yongguang; Ju, Weimin; Zhang, Zhaoying] Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210023, Peoples R China. [Wang, Songhan; Zhang, Yongguang; Ju, Weimin; Zhang, Zhaoying] Nanjing Univ, Sch Geog & Ocean Sci, Jiangsu Prov Key Lab Geog Informat Technol, Minist Nat Resources,Key Lab Land Satellite Remot, Nanjing 210023, Jiangsu, Peoples R China. [Zhang, Yongguang] Collaborat Innovat Ctr Novel Software Technol & I, Nanjing 210023, Peoples R China. [Porcar-Castell, Albert] Univ Helsinki, Inst Atmospher & Earth Syst Res Forest Sci, Opt Photosynth Lab, Helsinki, Finland. [Ye, Shanshan] Hohai Univ, Coll Hydrol & Water Resources, Nanjing, Peoples R China. [Bruemmer, Christian] Thunen Inst Climate Smart Agr, Bundesallee 65, D-38116 Braunschweig, Germany. [Urbaniak, Marek] Poznan Univ Life Sci, Inst Construct & Geoengn, Lab Meteorol Dept, Poznan, Poland. [Mammarella, Ivan] Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res Phys, Helsinki, Finland. [Juszczak, Radoslaw] Poznan Univ Life Sci, Dept Ecol & Environm Protect, Lab Bioclimatol, Poznan, Poland. [Boersma, K. Folkert] Wageningen Univ, Meteorol & Air Qual Grp, NL-6700 AA Wageningen, Netherlands. [Boersma, K. Folkert] Royal Netherlands Meteorol Inst, Satellite Observat Dept, NL-3730 AE De Bilt, Netherlands.

E-mail Addresses:yongguang_zhang@nju.edu.cn

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