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Title: Cross-scale impact of climate temporal variability on ecosystem water and carbon fluxes

Abstract

While the importance of ecosystem functioning is undisputed in the context of climate change and Earth system modeling, the role of short-scale temporal variability of hydrometeorological forcing (~1 h) on the related ecosystem processes remains to be fully understood. Additionally, various impacts of meteorological forcing variability on water and carbon fluxes across a range of scales are explored here using numerical simulations. Synthetic meteorological drivers that highlight dynamic features of the short temporal scale in series of precipitation, temperature, and radiation are constructed. These drivers force a mechanistic ecohydrological model that propagates information content into the dynamics of water and carbon fluxes for an ensemble of representative ecosystems. The focus of the analysis is on a cross-scale effect of the short-scale forcing variability on the modeled evapotranspiration and ecosystem carbon assimilation. Interannual variability of water and carbon fluxes is emphasized in the analysis. The main study inferences are summarized as follows: (a) short-scale variability of meteorological input does affect water and carbon fluxes across a wide range of time scales, spanning from the hourly to the annual and longer scales; (b) different ecosystems respond to the various characteristics of the short-scale variability of the climate forcing in various ways, dependingmore » on dominant factors limiting system productivity; (c) whenever short-scale variability of meteorological forcing influences primarily fast processes such as photosynthesis, its impact on the slow-scale variability of water and carbon fluxes is small; and (d) whenever short-scale variability of the meteorological forcing impacts slow processes such as movement and storage of water in the soil, the effects of the variability can propagate to annual and longer time scales.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Duke Univ., Durham, NC (United States). Nicholas School of the Environment; Institute of Environmental Engineering, ETH Zurich (Switzerland)
  2. Institute of Environmental Engineering, ETH Zurich (Switzerland)
  3. Duke Univ., Durham, NC (United States). Nicholas School of the Environment and Department of Civil and Environmental Engineering
  4. Univ. of Michigan, Ann Arbor, MI (United States). Department of Civil and Environmental Engineering
Publication Date:
Research Org.:
Duke Univ., Durham, NC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1454922
Alternate Identifier(s):
OSTI ID: 1402273
Grant/Contract Number:  
SC0006967; SC0011461
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Biogeosciences
Additional Journal Information:
Journal Volume: 120; Journal Issue: 9; Journal ID: ISSN 2169-8953
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; cross-scale interactions; ecohydrological modeling; ecosystem response; interannual variability; short-scale temporal climate variability; spectral analysis

Citation Formats

Paschalis, Athanasios, Fatichi, Simone, Katul, Gabriel G., and Ivanov, Valeriy Y. Cross-scale impact of climate temporal variability on ecosystem water and carbon fluxes. United States: N. p., 2015. Web. doi:10.1002/2015JG003002.
Paschalis, Athanasios, Fatichi, Simone, Katul, Gabriel G., & Ivanov, Valeriy Y. Cross-scale impact of climate temporal variability on ecosystem water and carbon fluxes. United States. doi:10.1002/2015JG003002.
Paschalis, Athanasios, Fatichi, Simone, Katul, Gabriel G., and Ivanov, Valeriy Y. Fri . "Cross-scale impact of climate temporal variability on ecosystem water and carbon fluxes". United States. doi:10.1002/2015JG003002. https://www.osti.gov/servlets/purl/1454922.
@article{osti_1454922,
title = {Cross-scale impact of climate temporal variability on ecosystem water and carbon fluxes},
author = {Paschalis, Athanasios and Fatichi, Simone and Katul, Gabriel G. and Ivanov, Valeriy Y.},
abstractNote = {While the importance of ecosystem functioning is undisputed in the context of climate change and Earth system modeling, the role of short-scale temporal variability of hydrometeorological forcing (~1 h) on the related ecosystem processes remains to be fully understood. Additionally, various impacts of meteorological forcing variability on water and carbon fluxes across a range of scales are explored here using numerical simulations. Synthetic meteorological drivers that highlight dynamic features of the short temporal scale in series of precipitation, temperature, and radiation are constructed. These drivers force a mechanistic ecohydrological model that propagates information content into the dynamics of water and carbon fluxes for an ensemble of representative ecosystems. The focus of the analysis is on a cross-scale effect of the short-scale forcing variability on the modeled evapotranspiration and ecosystem carbon assimilation. Interannual variability of water and carbon fluxes is emphasized in the analysis. The main study inferences are summarized as follows: (a) short-scale variability of meteorological input does affect water and carbon fluxes across a wide range of time scales, spanning from the hourly to the annual and longer scales; (b) different ecosystems respond to the various characteristics of the short-scale variability of the climate forcing in various ways, depending on dominant factors limiting system productivity; (c) whenever short-scale variability of meteorological forcing influences primarily fast processes such as photosynthesis, its impact on the slow-scale variability of water and carbon fluxes is small; and (d) whenever short-scale variability of the meteorological forcing impacts slow processes such as movement and storage of water in the soil, the effects of the variability can propagate to annual and longer time scales.},
doi = {10.1002/2015JG003002},
journal = {Journal of Geophysical Research. Biogeosciences},
number = 9,
volume = 120,
place = {United States},
year = {2015},
month = {8}
}

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journal, January 2013

  • Papalexiou, S. M.; Koutsoyiannis, D.; Makropoulos, C.
  • Hydrology and Earth System Sciences, Vol. 17, Issue 2
  • DOI: 10.5194/hess-17-851-2013

A biochemical model of photosynthetic CO2 assimilation in leaves of C3 species
journal, June 1980

  • Farquhar, G. D.; von Caemmerer, S.; Berry, J. A.
  • Planta, Vol. 149, Issue 1
  • DOI: 10.1007/BF00386231

Coupled Dynamics of Photosynthesis, Transpiration, and Soil Water Balance. Part I: Upscaling from Hourly to Daily Level
journal, June 2004


The role of local-scale heterogeneities in terrestrial ecosystem modeling
journal, February 2015

  • Pappas, Christoforos; Fatichi, Simone; Rimkus, Stefan
  • Journal of Geophysical Research: Biogeosciences, Vol. 120, Issue 2
  • DOI: 10.1002/2014JG002735

Modeling multiyear observations of soil moisture recharge in the semiarid American Southwest
journal, August 2000

  • Scott, Russell L.; Shuttleworth, W. James; Keefer, Timothy O.
  • Water Resources Research, Vol. 36, Issue 8
  • DOI: 10.1029/2000WR900116

Carbon in Amazon Forests: Unexpected Seasonal Fluxes and Disturbance-Induced Losses
journal, November 2003


Temporal dynamics of soil moisture in a northern temperate mixed successional forest after a prescribed intermediate disturbance
journal, October 2013