An enhanced model of land water and energy for global hydrologic and earth-system studies
LM3 is a new model of terrestrial water, energy, and carbon, intended for use in global hydrologic analyses and as a component of earth-system and physical-climate models. It is designed to improve upon the performance and to extend the scope of the predecessor Land Dynamics (LaD) and LM3V models by...
Published in: | Journal of Hydrometeorology |
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Language: | English |
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American Meteorological Society
2014
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-210 https://doi.org/10.1175/JHM-D-13-0162.1 |
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ftncar:oai:drupal-site.org:articles_14399 2023-09-05T13:20:08+02:00 An enhanced model of land water and energy for global hydrologic and earth-system studies Milly, P. (author) Malyshev, Sergey (author) Shevliakova, Elena (author) Dunne, Krista (author) Findell, Kirsten (author) Gleeson, Tom (author) Liang, Zhi (author) Phillipps, Peter (author) Stouffer, Ronald (author) Swenson, Sean (author) 2014-10-01 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-210 https://doi.org/10.1175/JHM-D-13-0162.1 en eng American Meteorological Society Journal of Hydrometeorology http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-210 doi:10.1175/JHM-D-13-0162.1 ark:/85065/d7k0758q Copyright 2014 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Text article 2014 ftncar https://doi.org/10.1175/JHM-D-13-0162.1 2023-08-14T18:36:21Z LM3 is a new model of terrestrial water, energy, and carbon, intended for use in global hydrologic analyses and as a component of earth-system and physical-climate models. It is designed to improve upon the performance and to extend the scope of the predecessor Land Dynamics (LaD) and LM3V models by better quantifying the physical controls of climate and biogeochemistry and by relating more directly to components of the global water system that touch human concerns. LM3 includes multilayer representations of temperature, liquid water content, and ice content of both snowpack and macroporous soil–bedrock; topography-based description of saturated area and groundwater discharge; and transport of runoff to the ocean via a global river and lake network. Sensible heat transport by water mass is accounted throughout for a complete energy balance. Carbon and vegetation dynamics and biophysics are represented as in LM3V. In numerical experiments, LM3 avoids some of the limitations of the LaD model and provides qualitatively (though not always quantitatively) reasonable estimates, from a global perspective, of observed spatial and/or temporal variations of vegetation density, albedo, streamflow, water-table depth, permafrost, and lake levels. Amplitude and phase of annual cycle of total water storage are simulated well. Realism of modeled lake levels varies widely. The water table tends to be consistently too shallow in humid regions. Biophysical properties have an artificial stepwise spatial structure, and equilibrium vegetation is sensitive to initial conditions. Explicit resolution of thick (>100 m) unsaturated zones and permafrost is possible, but only at the cost of long (≫300 yr) model spinup times. Article in Journal/Newspaper Ice permafrost OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Hydrometeorology 15 5 1739 1761 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
LM3 is a new model of terrestrial water, energy, and carbon, intended for use in global hydrologic analyses and as a component of earth-system and physical-climate models. It is designed to improve upon the performance and to extend the scope of the predecessor Land Dynamics (LaD) and LM3V models by better quantifying the physical controls of climate and biogeochemistry and by relating more directly to components of the global water system that touch human concerns. LM3 includes multilayer representations of temperature, liquid water content, and ice content of both snowpack and macroporous soil–bedrock; topography-based description of saturated area and groundwater discharge; and transport of runoff to the ocean via a global river and lake network. Sensible heat transport by water mass is accounted throughout for a complete energy balance. Carbon and vegetation dynamics and biophysics are represented as in LM3V. In numerical experiments, LM3 avoids some of the limitations of the LaD model and provides qualitatively (though not always quantitatively) reasonable estimates, from a global perspective, of observed spatial and/or temporal variations of vegetation density, albedo, streamflow, water-table depth, permafrost, and lake levels. Amplitude and phase of annual cycle of total water storage are simulated well. Realism of modeled lake levels varies widely. The water table tends to be consistently too shallow in humid regions. Biophysical properties have an artificial stepwise spatial structure, and equilibrium vegetation is sensitive to initial conditions. Explicit resolution of thick (>100 m) unsaturated zones and permafrost is possible, but only at the cost of long (≫300 yr) model spinup times. |
author2 |
Milly, P. (author) Malyshev, Sergey (author) Shevliakova, Elena (author) Dunne, Krista (author) Findell, Kirsten (author) Gleeson, Tom (author) Liang, Zhi (author) Phillipps, Peter (author) Stouffer, Ronald (author) Swenson, Sean (author) |
format |
Article in Journal/Newspaper |
title |
An enhanced model of land water and energy for global hydrologic and earth-system studies |
spellingShingle |
An enhanced model of land water and energy for global hydrologic and earth-system studies |
title_short |
An enhanced model of land water and energy for global hydrologic and earth-system studies |
title_full |
An enhanced model of land water and energy for global hydrologic and earth-system studies |
title_fullStr |
An enhanced model of land water and energy for global hydrologic and earth-system studies |
title_full_unstemmed |
An enhanced model of land water and energy for global hydrologic and earth-system studies |
title_sort |
enhanced model of land water and energy for global hydrologic and earth-system studies |
publisher |
American Meteorological Society |
publishDate |
2014 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-210 https://doi.org/10.1175/JHM-D-13-0162.1 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
Journal of Hydrometeorology http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-210 doi:10.1175/JHM-D-13-0162.1 ark:/85065/d7k0758q |
op_rights |
Copyright 2014 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JHM-D-13-0162.1 |
container_title |
Journal of Hydrometeorology |
container_volume |
15 |
container_issue |
5 |
container_start_page |
1739 |
op_container_end_page |
1761 |
_version_ |
1776200854900047872 |