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Title: A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling

Abstract

Earth’s terrestrial near-subsurface environment can be divided into relatively porous layers of soil, intact regolith, and sedimentary deposits above unweathered bedrock. Variations in the thicknesses of these layers control the hydrologic and biogeochemical responses of landscapes. Currently, Earth System Models approximate the thickness of these relatively permeable layers above bedrock as uniform globally, despite the fact that their thicknesses vary systematically with topography, climate, and geology. To meet the need for more realistic input data for models, we developed a high-resolution gridded global data set of the average thicknesses of soil, intact regolith, and sedimentary deposits within each 30 arcsec (~ 1 km) pixel using the best available data for topography, climate, and geology as input. Our data set partitions the global land surface into upland hillslope, upland valley bottom, and lowland landscape components and uses models optimized for each landform type to estimate the thicknesses of each subsurface layer. On hillslopes, the data set is calibrated and validated using independent data sets of measured soil thicknesses from the U.S. and Europe and on lowlands using depth to bedrock observations from groundwater wells in the U.S. As a result, we anticipate that the data set will prove useful as anmore » input to regional and global hydrological and ecosystems models.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Univ. of Arizona, Tucson, AZ (United States)
  2. National Center for Atmospheric Research, Boulder, CO (United States)
Publication Date:
Research Org.:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1235593
Alternate Identifier(s):
OSTI ID: 1235594; OSTI ID: 1258612
Grant/Contract Number:  
SC0006773
Resource Type:
Published Article
Journal Name:
Journal of Advances in Modeling Earth Systems
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 1942-2466
Publisher:
American Geophysical Union (AGU)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Pelletier, Jon D., Broxton, Patrick D., Hazenberg, Pieter, Zeng, Xubin, Troch, Peter A., Niu, Guo -Yue, Williams, Zachary, Brunke, Michael A., and Gochis, David. A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling. United States: N. p., 2016. Web. doi:10.1002/2015MS000526.
Pelletier, Jon D., Broxton, Patrick D., Hazenberg, Pieter, Zeng, Xubin, Troch, Peter A., Niu, Guo -Yue, Williams, Zachary, Brunke, Michael A., & Gochis, David. A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling. United States. doi:10.1002/2015MS000526.
Pelletier, Jon D., Broxton, Patrick D., Hazenberg, Pieter, Zeng, Xubin, Troch, Peter A., Niu, Guo -Yue, Williams, Zachary, Brunke, Michael A., and Gochis, David. Fri . "A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling". United States. doi:10.1002/2015MS000526.
@article{osti_1235593,
title = {A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling},
author = {Pelletier, Jon D. and Broxton, Patrick D. and Hazenberg, Pieter and Zeng, Xubin and Troch, Peter A. and Niu, Guo -Yue and Williams, Zachary and Brunke, Michael A. and Gochis, David},
abstractNote = {Earth’s terrestrial near-subsurface environment can be divided into relatively porous layers of soil, intact regolith, and sedimentary deposits above unweathered bedrock. Variations in the thicknesses of these layers control the hydrologic and biogeochemical responses of landscapes. Currently, Earth System Models approximate the thickness of these relatively permeable layers above bedrock as uniform globally, despite the fact that their thicknesses vary systematically with topography, climate, and geology. To meet the need for more realistic input data for models, we developed a high-resolution gridded global data set of the average thicknesses of soil, intact regolith, and sedimentary deposits within each 30 arcsec (~ 1 km) pixel using the best available data for topography, climate, and geology as input. Our data set partitions the global land surface into upland hillslope, upland valley bottom, and lowland landscape components and uses models optimized for each landform type to estimate the thicknesses of each subsurface layer. On hillslopes, the data set is calibrated and validated using independent data sets of measured soil thicknesses from the U.S. and Europe and on lowlands using depth to bedrock observations from groundwater wells in the U.S. As a result, we anticipate that the data set will prove useful as an input to regional and global hydrological and ecosystems models.},
doi = {10.1002/2015MS000526},
journal = {Journal of Advances in Modeling Earth Systems},
number = 1,
volume = 8,
place = {United States},
year = {2016},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1002/2015MS000526

Citation Metrics:
Cited by: 18 works
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    Works referencing / citing this record:

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