The weekly cycle of photosynthesis in Europe reveals the negative impact of particulate pollution on ecosystem productivity-Reference-Cited by-同舟云学术

The weekly cycle of photosynthesis in Europe reveals the negative impact of particulate pollution on ecosystem productivity

Published:2023-11-20 Issue:49 Volume:120 Page:
ISSN:0027-8424
Container-title:Proceedings of the National Academy of Sciences
language:en
Short-container-title:Proc. Natl. Acad. Sci. U.S.A.

Author:

He Liyin¹^ORCID,Rosa Lorenzo¹^ORCID,Lobell David B.²³^ORCID,Wang Yuan²,Yin Yi⁴⁵^ORCID,Doughty Russell⁶^ORCID,Yao Yitong⁴,Berry Joseph A.¹^ORCID,Frankenberg Christian⁴⁷^ORCID

Affiliation:

1. Department of Global Ecology, Carnegie Institution for Science, Stanford, CA 94305

2. Department of Earth System Science, Stanford University, Stanford, CA 94305

3. Center on Food Security and the Environment, Stanford University, Stanford, CA 94305

4. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125

5. Department of Environmental Studies, New York University, New York, NY 10003

6. College of Atmospheric and Geographic Sciences, University of Oklahoma, Norman, OK 73019

7. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109

Abstract

Aerosols can affect photosynthesis through radiative perturbations such as scattering and absorbing solar radiation. This biophysical impact has been widely studied using field measurements, but the sign and magnitude at continental scales remain uncertain. Solar-induced fluorescence (SIF), emitted by chlorophyll, strongly correlates with photosynthesis. With recent advancements in Earth observation satellites, we leverage SIF observations from the Tropospheric Monitoring Instrument (TROPOMI) with unprecedented spatial resolution and near-daily global coverage, to investigate the impact of aerosols on photosynthesis. Our analysis reveals that on weekends when there is more plant-available sunlight due to less particulate pollution, 64% of regions across Europe show increased SIF, indicating more photosynthesis. Moreover, we find a widespread negative relationship between SIF and aerosol loading across Europe. This suggests the possible reduction in photosynthesis as aerosol levels increase, particularly in ecosystems limited by light availability. By considering two plausible scenarios of improved air quality—reducing aerosol levels to the weekly minimum 3-d values and levels observed during the COVID-19 period—we estimate a potential of 41 to 50 Mt net additional annual CO 2 uptake by terrestrial ecosystems in Europe. This work assesses human impacts on photosynthesis via aerosol pollution at continental scales using satellite observations. Our results highlight i) the use of spatiotemporal variations in satellite SIF to estimate the human impacts on photosynthesis and ii) the potential of reducing particulate pollution to enhance ecosystem productivity.

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

Link

https://pnas.org/doi/pdf/10.1073/pnas.2306507120

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