Diminishing carryover benefits of earlier spring vegetation growth

Nature Ecology & Evolution, Journal Year: 2024, Volume and Issue: 8(2), P. 218 - 228

Published: Jan. 3, 2024

Language: Английский

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Reviews and syntheses: Remotely sensed optical time series for monitoring vegetation productivity

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(2), P. 473 - 511

Published: Jan. 25, 2024

Abstract. Vegetation productivity is a critical indicator of global ecosystem health and impacted by human activities climate change. A wide range optical sensing platforms, from ground-based to airborne satellite, provide spatially continuous information on terrestrial vegetation status functioning. As Earth observation (EO) data are usually routinely acquired, can be monitored repeatedly over time, reflecting seasonal patterns trends in metrics. Such metrics include gross primary productivity, net biomass, or yield. To summarize current knowledge, this paper we systematically reviewed time series (TS) literature for assessing state-of-the-art monitoring approaches different ecosystems based remote (RS) data. the integration solar-induced fluorescence (SIF) processing chains has emerged as promising source, also relatively recent sensor modality. We define three methodological categories derive remotely sensed TS indices quantitative traits: (i) trend analysis anomaly detection, (ii) land surface phenology, (iii) assimilation TS-derived into statistical process-based dynamic models (DVMs). Although majority used streams originate acquired satellite aircraft unoccupied aerial vehicles have found their way studies. facilitate processing, list common toolboxes inferring further discuss validation strategies RS derived metrics: (1) using situ measured data, such yield; (2) networks distinct sensors, including spectroradiometers, flux towers, phenological cameras; (3) inter-comparison Finally, address challenges propose conceptual framework derivation, fully integrated DVMs radiative transfer here labelled “Digital Twin”. This novel meets requirements multiple enables both an improved understanding temporal dynamics response environmental drivers enhances accuracy monitoring.

Language: Английский

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Decadal increases in carbon uptake offset by respiratory losses across northern permafrost ecosystems

Nature Climate Change, Journal Year: 2024, Volume and Issue: 14(8), P. 853 - 862

Published: July 26, 2024

Abstract Tundra and boreal ecosystems encompass the northern circumpolar permafrost region are experiencing rapid environmental change with important implications for global carbon (C) budget. We analysed multi-decadal time series containing 302 annual estimates of dioxide (CO 2 ) flux across 70 non-permafrost ecosystems, 672 summer CO 181 ecosystems. find an increase in sink but not despite similar increases uptake. Thus, recent non-growing-season losses have substantially impacted balance Furthermore, analysis interannual variability reveals warmer summers amplify C cycle (increase productivity respiration) at putatively nitrogen-limited sites less reliant on precipitation water use. Our findings suggest that nutrient availability will be predictors C-cycle response these to future warming.

Language: Английский

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Synergistic effects of high atmospheric and soil dryness on record-breaking decreases in vegetation productivity over Southwest China in 2023

npj Climate and Atmospheric Science, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 8, 2025

Language: Английский

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Increased early-season productivity drives earlier peak of vegetation photosynthesis across the Northern Hemisphere

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: Feb. 27, 2025

Language: Английский

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Increasing temperature regulates the advance of peak photosynthesis timing in the boreal ecosystem

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 882, P. 163587 - 163587

Published: April 20, 2023

Language: Английский

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Tipping point in North American Arctic-Boreal carbon sink persists in new generation Earth system models despite reduced uncertainty

Environmental Research Letters, Journal Year: 2023, Volume and Issue: 18(2), P. 025008 - 025008

Published: Jan. 11, 2023

Abstract Estimating the impacts of climate change on global carbon cycle relies projections from Earth system models (ESMs). While ESMs currently project large warming in high northern latitudes, magnitude and sign future balance Arctic-Boreal ecosystems are highly uncertain. The new generation increased complexity Intergovernmental Panel Climate Change Sixth Assessment Report (IPCC AR6) is intended to improve projections. Here, we benchmark Coupled Model Intercomparison Project (CMIP) 5 6 (8 CMIP5 members 12 CMIP6 members) with International Land Benchmarking (ILAMB) tool over region NASA’s vulnerability experiment (ABoVE) North America. We show that projected average net biome production (NBP) 2100 higher than ABoVE domain, despite model spread being slightly narrower. Overall, shows better agreement contemporary observed variables (photosynthesis, respiration, biomass) CMIP5, except for soil turnover time. Although both CMIP ensemble domain will remain a sink by end 21st century, strength increases CO 2 emissions. ensembles indicate tipping point defined here as negative inflection NBP curve 2050–2080 independently shared socioeconomic pathway (SSP) or representative concentration (RCP) CMIP5. therefore suggest that, if keeps declining throughout America may become source next century.

Language: Английский

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Reassessment of growth-climate relations indicates the potential for decline across Eurasian boreal larch forests

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 8, 2023

Larch, a widely distributed tree in boreal Eurasia, is experiencing rapid warming across much of its distribution. A comprehensive assessment growth on needed to comprehend the potential impact climate change. Most studies, relying rigid calendar-based temperature series, have detected monotonic responses at margins but not region. Here, we developed method for constructing temporally flexible and physiologically relevant series reassess growth-temperature relations larch Eurasia. Our appears more effective assessing than previous methods. approach indicates widespread spatially heterogeneous that are driven by local climate. Models quantifying these results project negative will spread northward upward throughout this century. If true, risks Eurasia could be conveyed from works.

Language: Английский

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Climate warming-induced phenology changes dominate vegetation productivity in Northern Hemisphere ecosystems

Ecological Indicators, Journal Year: 2023, Volume and Issue: 151, P. 110326 - 110326

Published: May 7, 2023

The climate change is expected to trigger changes in vegetation phenology, temperature, and soil moisture (SM), altering the productivity of ecosystems. Despite numerous existing efforts, however, their contradicting conclusions suggest that how impacted by these factors still remains unclear Northern Hemisphere ecosystems (≥25°N). This study used optimal fingerprint (OFP) method redundancy analysis (RDA) attribute importance key drivers from 2001 2019 based on long-term remote sensing FLUXNET observation data. results showed solar-induced chlorophyll fluorescence (SIF), gross primary (GPP), net (NPP) were increased 72.01% 88.04% areas. We observed correlation between spring autumn growing season length (GSL), SM, temperature reached 99% significance level, where early delayed extended GSL, elevated all enhanced ecosystem productivity, with GSL being most important factor driving productivity. In addition, pixel-wise attribution indicated as dominant driver, accounted for 30.24% followed (23.79%), phenology (19.56%), (14.09%), SM (12.31%), which dominated positive effects (54.19% 73.14%). this serve references benefit our understanding mechanisms temperature-phenology-SM interactions

Language: Английский

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Shifts in the trends of vegetation greenness and photosynthesis in different parts of Tibetan Plateau over the past two decades

Agricultural and Forest Meteorology, Journal Year: 2023, Volume and Issue: 345, P. 109851 - 109851

Published: Dec. 8, 2023

Language: Английский

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