Local and General Patterns of Terrestrial Water‐Carbon Coupling. Short Gianotti, D. J. & Entekhabi, D. Geophysical Research Letters, 51(12):e2024GL109625, June, 2024. ![Local and General Patterns of Terrestrial Water‐Carbon Coupling [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Abstract Terrestrial carbon uptake and water availability have coupled feedbacks; specifically water uptake for plant growth and soil drying via transpiration. While we might expect this coupling over time at arid sites, climatic water availability also widely covaries geographically with biomass variables that control photosynthetic rates. Using eddy covariance data globally, we find convex, positively‐covarying relations between carbon uptake and a turbulent flux metric controlled by land surface moisture ( r = 0.73 monthly across sites) at the site level. We estimate a general, empirical relationship based on site‐wise water‐carbon dynamics. Most sites, and the general relationship, show strong power‐law dependence, implicating the role of sub‐seasonal land‐cover dynamics. We also find that long‐term mean carbon/water states follow a similar convex relationship to the site‐specific temporal dynamics. We discuss opportunities and caveats for space‐for‐time frameworks of carbon/water feedback processes globally. , Plain Language Summary The amount of carbon dioxide that plants take from the air depends on how plants respond to water and water stress. At the same time, plants also control the loss of water from the landscape through transpiration. While we think of individual stressed plants in dry conditions as being very sensitive to the time‐variability in water available to them, we find here that the average carbon uptake by plants across climate zones is similarly related to climatic water availability. Water availability and carbon uptake rates seem not to depend strongly on location, so that most locations behave quite similarly, across many climates. This can be explained by similar structural changes in the vegetation canopy in response to water stress, whether it be over time at a site or across regions with different mean climate conditions. , Key Points Landscape carbon uptake displays strong relationships with landscape evaporative fraction These relations are non‐linear both at single sites and across bioclimates at eddy covariance tower sites Changes in structural canopy‐scale variables (e.g., leaf‐area) may dominate the coupling of water and carbon cycles similarly in both space and time
@article{short_gianotti_local_2024,
title = {Local and {General} {Patterns} of {Terrestrial} {Water}‐{Carbon} {Coupling}},
volume = {51},
issn = {0094-8276, 1944-8007},
url = {https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109625},
doi = {10.1029/2024GL109625},
abstract = {Abstract
Terrestrial carbon uptake and water availability have coupled feedbacks; specifically water uptake for plant growth and soil drying via transpiration. While we might expect this coupling over time at arid sites, climatic water availability also widely covaries geographically with biomass variables that control photosynthetic rates. Using eddy covariance data globally, we find convex, positively‐covarying relations between carbon uptake and a turbulent flux metric controlled by land surface moisture (
r
= 0.73 monthly across sites) at the site level. We estimate a general, empirical relationship based on site‐wise water‐carbon dynamics. Most sites, and the general relationship, show strong power‐law dependence, implicating the role of sub‐seasonal land‐cover dynamics. We also find that long‐term mean carbon/water states follow a similar convex relationship to the site‐specific temporal dynamics. We discuss opportunities and caveats for space‐for‐time frameworks of carbon/water feedback processes globally.
,
Plain Language Summary
The amount of carbon dioxide that plants take from the air depends on how plants respond to water and water stress. At the same time, plants also control the loss of water from the landscape through transpiration. While we think of individual stressed plants in dry conditions as being very sensitive to the time‐variability in water available to them, we find here that the average carbon uptake by plants across climate zones is similarly related to climatic water availability. Water availability and carbon uptake rates seem not to depend strongly on location, so that most locations behave quite similarly, across many climates. This can be explained by similar structural changes in the vegetation canopy in response to water stress, whether it be over time at a site or across regions with different mean climate conditions.
,
Key Points
Landscape carbon uptake displays strong relationships with landscape evaporative fraction
These relations are non‐linear both at single sites and across bioclimates at eddy covariance tower sites
Changes in structural canopy‐scale variables (e.g., leaf‐area) may dominate the coupling of water and carbon cycles similarly in both space and time},
language = {en},
number = {12},
urldate = {2024-11-26},
journal = {Geophysical Research Letters},
author = {Short Gianotti, Daniel J. and Entekhabi, Dara},
month = jun,
year = {2024},
pages = {e2024GL109625},
}
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Using eddy covariance data globally, we find convex, positively‐covarying relations between carbon uptake and a turbulent flux metric controlled by land surface moisture ( r = 0.73 monthly across sites) at the site level. We estimate a general, empirical relationship based on site‐wise water‐carbon dynamics. Most sites, and the general relationship, show strong power‐law dependence, implicating the role of sub‐seasonal land‐cover dynamics. We also find that long‐term mean carbon/water states follow a similar convex relationship to the site‐specific temporal dynamics. We discuss opportunities and caveats for space‐for‐time frameworks of carbon/water feedback processes globally. , Plain Language Summary The amount of carbon dioxide that plants take from the air depends on how plants respond to water and water stress. At the same time, plants also control the loss of water from the landscape through transpiration. While we think of individual stressed plants in dry conditions as being very sensitive to the time‐variability in water available to them, we find here that the average carbon uptake by plants across climate zones is similarly related to climatic water availability. Water availability and carbon uptake rates seem not to depend strongly on location, so that most locations behave quite similarly, across many climates. This can be explained by similar structural changes in the vegetation canopy in response to water stress, whether it be over time at a site or across regions with different mean climate conditions. , Key Points Landscape carbon uptake displays strong relationships with landscape evaporative fraction These relations are non‐linear both at single sites and across bioclimates at eddy covariance tower sites Changes in structural canopy‐scale variables (e.g., leaf‐area) may dominate the coupling of water and carbon cycles similarly in both space and time","language":"en","number":"12","urldate":"2024-11-26","journal":"Geophysical Research Letters","author":[{"propositions":[],"lastnames":["Short","Gianotti"],"firstnames":["Daniel","J."],"suffixes":[]},{"propositions":[],"lastnames":["Entekhabi"],"firstnames":["Dara"],"suffixes":[]}],"month":"June","year":"2024","pages":"e2024GL109625","bibtex":"@article{short_gianotti_local_2024,\n\ttitle = {Local and {General} {Patterns} of {Terrestrial} {Water}‐{Carbon} {Coupling}},\n\tvolume = {51},\n\tissn = {0094-8276, 1944-8007},\n\turl = {https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109625},\n\tdoi = {10.1029/2024GL109625},\n\tabstract = {Abstract\n \n Terrestrial carbon uptake and water availability have coupled feedbacks; specifically water uptake for plant growth and soil drying via transpiration. While we might expect this coupling over time at arid sites, climatic water availability also widely covaries geographically with biomass variables that control photosynthetic rates. Using eddy covariance data globally, we find convex, positively‐covarying relations between carbon uptake and a turbulent flux metric controlled by land surface moisture (\n r\n = 0.73 monthly across sites) at the site level. We estimate a general, empirical relationship based on site‐wise water‐carbon dynamics. Most sites, and the general relationship, show strong power‐law dependence, implicating the role of sub‐seasonal land‐cover dynamics. We also find that long‐term mean carbon/water states follow a similar convex relationship to the site‐specific temporal dynamics. We discuss opportunities and caveats for space‐for‐time frameworks of carbon/water feedback processes globally.\n \n , \n Plain Language Summary\n The amount of carbon dioxide that plants take from the air depends on how plants respond to water and water stress. At the same time, plants also control the loss of water from the landscape through transpiration. While we think of individual stressed plants in dry conditions as being very sensitive to the time‐variability in water available to them, we find here that the average carbon uptake by plants across climate zones is similarly related to climatic water availability. Water availability and carbon uptake rates seem not to depend strongly on location, so that most locations behave quite similarly, across many climates. This can be explained by similar structural changes in the vegetation canopy in response to water stress, whether it be over time at a site or across regions with different mean climate conditions.\n , \n Key Points\n \n \n \n Landscape carbon uptake displays strong relationships with landscape evaporative fraction\n \n \n These relations are non‐linear both at single sites and across bioclimates at eddy covariance tower sites\n \n \n Changes in structural canopy‐scale variables (e.g., leaf‐area) may dominate the coupling of water and carbon cycles similarly in both space and time},\n\tlanguage = {en},\n\tnumber = {12},\n\turldate = {2024-11-26},\n\tjournal = {Geophysical Research Letters},\n\tauthor = {Short Gianotti, Daniel J. and Entekhabi, Dara},\n\tmonth = jun,\n\tyear = {2024},\n\tpages = {e2024GL109625},\n}\n\n\n\n","author_short":["Short Gianotti, D. 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