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Title: Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis

Abstract

Climate change and rising CO2 are altering the behavior of land plants in ways that influence how much biomass they produce relative to how much water they need for growth. This study shows that it is possible to detect changes occurring in plants using long-term measurements of the isotopic composition of atmospheric CO2. These measurements imply that plants have globally increased their water use efficiency at the leaf level in proportion to the rise in atmospheric CO2 over the past few decades. While the full implications remain to be explored, the results help to quantify the extent to which the biosphere has become less constrained by water stress globally.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1535353
Grant/Contract Number:  
SC0012167
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 114; Journal Issue: 39; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
Science & Technology - Other Topics

Citation Formats

Keeling, Ralph F., Graven, Heather D., Welp, Lisa R., Resplandy, Laure, Bi, Jian, Piper, Stephen C., Sun, Ying, Bollenbacher, Alane, and Meijer, Harro A. J. Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis. United States: N. p., 2017. Web. doi:10.1073/pnas.1619240114.
Keeling, Ralph F., Graven, Heather D., Welp, Lisa R., Resplandy, Laure, Bi, Jian, Piper, Stephen C., Sun, Ying, Bollenbacher, Alane, & Meijer, Harro A. J. Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis. United States. doi:10.1073/pnas.1619240114.
Keeling, Ralph F., Graven, Heather D., Welp, Lisa R., Resplandy, Laure, Bi, Jian, Piper, Stephen C., Sun, Ying, Bollenbacher, Alane, and Meijer, Harro A. J. Mon . "Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis". United States. doi:10.1073/pnas.1619240114. https://www.osti.gov/servlets/purl/1535353.
@article{osti_1535353,
title = {Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis},
author = {Keeling, Ralph F. and Graven, Heather D. and Welp, Lisa R. and Resplandy, Laure and Bi, Jian and Piper, Stephen C. and Sun, Ying and Bollenbacher, Alane and Meijer, Harro A. J.},
abstractNote = {Climate change and rising CO2 are altering the behavior of land plants in ways that influence how much biomass they produce relative to how much water they need for growth. This study shows that it is possible to detect changes occurring in plants using long-term measurements of the isotopic composition of atmospheric CO2. These measurements imply that plants have globally increased their water use efficiency at the leaf level in proportion to the rise in atmospheric CO2 over the past few decades. While the full implications remain to be explored, the results help to quantify the extent to which the biosphere has become less constrained by water stress globally.},
doi = {10.1073/pnas.1619240114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 39,
volume = 114,
place = {United States},
year = {2017},
month = {9}
}

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Cited by: 19 works
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Works referenced in this record:

Can bottom-up ocean CO2 fluxes be reconciled with atmospheric 13C observations?
journal, January 2010


Closing the global radiocarbon budget 1945–2005
journal, January 2006

  • Naegler, Tobias; Levin, Ingeborg
  • Journal of Geophysical Research, Vol. 111, Issue D12
  • DOI: 10.1029/2005JD006758

Global Carbon Sinks and Their Variability Inferred from Atmospheric O2 and δ13C
journal, March 2000