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Title: Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1

Abstract

Phase 1 of isotopes in the Project for Intercomparison of Land-surface Parameterization Schemes (iPILPS) compares the simulation of two stable water isotopologues ({sup 1}H{sub 2} {sup 18}O and {sup 1}H{sup 2}H{sup 16}O) at the land-atmosphere interface. The simulations are off-line, with forcing from an isotopically enabled regional model for three locations selected to offer contrasting climates and ecotypes: an evergreen tropical forest, a sclerophyll eucalypt forest and a mixed deciduous wood. Here we report on the experimental framework, the quality control undertaken on the simulation results and the method of intercomparisons employed. The small number of available isotopically-enabled land-surface schemes (ILSSs) limits the drawing of strong conclusions but, despite this, there is shown to be benefit in undertaking this type of isotopic intercomparison. Although validation of isotopic simulations at the land surface must await more, and much more complete, observational campaigns, we find that the empirically-based Craig-Gordon parameterization (of isotopic fractionation during evaporation) gives adequately realistic isotopic simulations when incorporated in a wide range of land-surface codes. By introducing two new tools for understanding isotopic variability from the land surface, the Isotope Transfer Function and the iPILPS plot, we show that different hydrological parameterizations cause very different isotopic responses. Wemore » show that ILSS-simulated isotopic equilibrium is independent of the total water and energy budget (with respect to both equilibration time and state), but interestingly the partitioning of available energy and water is a function of the models' complexity.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
COLLABORATION - Collaboration with ANSTO,Institute for Nuclear Geophysiology; NASA Goddard Institte for SpaceSciences and Columbia University; University of Technology at Sydney,Australia; Universi
OSTI Identifier:
901054
Report Number(s):
LBNL-60932
Journal ID: ISSN 0921-8181; GPCHE4; TRN: US200711%%777
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Global and Planetary Change; Journal Volume: 51; Journal Issue: 1-2 (Special Issue); Related Information: Journal Publication Date: May 2006
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; CLIMATES; ECOSYSTEMS; ENERGY BALANCE; EVAPORATION; FORESTS; FRACTIONATION; QUALITY CONTROL; SIMULATION; TRANSFER FUNCTIONS; VALIDATION; WATER; WOOD

Citation Formats

Henderson-Sellers, A., Fischer, M., Aleinov, I., McGuffie, K., Riley, W.J., Schmidt, G.A., Sturm, K., Yoshimura, K., and Irannejad, P. Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1. United States: N. p., 2005. Web.
Henderson-Sellers, A., Fischer, M., Aleinov, I., McGuffie, K., Riley, W.J., Schmidt, G.A., Sturm, K., Yoshimura, K., & Irannejad, P. Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1. United States.
Henderson-Sellers, A., Fischer, M., Aleinov, I., McGuffie, K., Riley, W.J., Schmidt, G.A., Sturm, K., Yoshimura, K., and Irannejad, P. Mon . "Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1". United States. doi:. https://www.osti.gov/servlets/purl/901054.
@article{osti_901054,
title = {Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1},
author = {Henderson-Sellers, A. and Fischer, M. and Aleinov, I. and McGuffie, K. and Riley, W.J. and Schmidt, G.A. and Sturm, K. and Yoshimura, K. and Irannejad, P.},
abstractNote = {Phase 1 of isotopes in the Project for Intercomparison of Land-surface Parameterization Schemes (iPILPS) compares the simulation of two stable water isotopologues ({sup 1}H{sub 2} {sup 18}O and {sup 1}H{sup 2}H{sup 16}O) at the land-atmosphere interface. The simulations are off-line, with forcing from an isotopically enabled regional model for three locations selected to offer contrasting climates and ecotypes: an evergreen tropical forest, a sclerophyll eucalypt forest and a mixed deciduous wood. Here we report on the experimental framework, the quality control undertaken on the simulation results and the method of intercomparisons employed. The small number of available isotopically-enabled land-surface schemes (ILSSs) limits the drawing of strong conclusions but, despite this, there is shown to be benefit in undertaking this type of isotopic intercomparison. Although validation of isotopic simulations at the land surface must await more, and much more complete, observational campaigns, we find that the empirically-based Craig-Gordon parameterization (of isotopic fractionation during evaporation) gives adequately realistic isotopic simulations when incorporated in a wide range of land-surface codes. By introducing two new tools for understanding isotopic variability from the land surface, the Isotope Transfer Function and the iPILPS plot, we show that different hydrological parameterizations cause very different isotopic responses. We show that ILSS-simulated isotopic equilibrium is independent of the total water and energy budget (with respect to both equilibration time and state), but interestingly the partitioning of available energy and water is a function of the models' complexity.},
doi = {},
journal = {Global and Planetary Change},
number = 1-2 (Special Issue),
volume = 51,
place = {United States},
year = {Mon Oct 31 00:00:00 EST 2005},
month = {Mon Oct 31 00:00:00 EST 2005}
}