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Assessment and enhancement of MERRA land surface hydrology estimates

Rolf H Reichle, Randal D Koster, Gabriëlle De Lannoy UGent, Barton A Forman, Qing Liu, Sarith PP Mahanama and Ally Toure (2011) JOURNAL OF CLIMATE. 24(24). p.6322-6338
abstract
The Modern-Era Retrospective Analysis for Research and Applications (MERRA) is a state-of-the-art reanalysis that provides, in addition to atmospheric fields, global estimates of soil moisture, latent heat flux, snow, and runoff for 1979 present. This study introduces a supplemental and improved set of land surface hydrological fields ("MERRA-Land") generated by rerunning a revised version of the land component of the MERRA system. Specifically, the MERRA-Land estimates benefit from corrections to the precipitation forcing with the Global Precipitation Climatology Project pentad product (version 2.1) and from revised parameter values in the rainfall interception model, changes that effectively correct for known limitations in the MERRA surface meteorological forcings. The skill (defined as the correlation coefficient of the anomaly time series) in land surface hydrological fields from MERRA and MERRA-Land is assessed here against observations and compared to the skill of the state-of-the-art ECMWF Re-Analysis-Interim (ERA-I). MERRA-Land and ERA-I root zone soil moisture skills (against in situ observations at 85 U.S. stations) are comparable and significantly greater than that of MERRA. Throughout the Northern Hemisphere, MERRA and MERRA-Land agree reasonably well with in situ snow depth measurements (from 583 stations) and with snow water equivalent from an independent analysis. Runoff skill (against naturalized stream flow observations from 18 U.S. basins) of MERRA and MERRA-Land is typically higher than that of ERA-I. With a few exceptions, the MERRA-Land data appear more accurate than the original MERRA estimates and are thus recommended for those interested in using MERRA output for land surface hydrological studies.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
GAUGE OBSERVATIONS, FORECAST SYSTEM, SATELLITE-OBSERVATIONS, GLOBAL SOIL-MOISTURE, SNOW WATER EQUIVALENT, ERA-INTERIM REANALYSIS, DATA ASSIMILATION SYSTEM, CATCHMENT-BASED APPROACH, FORCING DATA, PRECIPITATION
journal title
JOURNAL OF CLIMATE
J. Clim.
volume
24
issue
24
pages
6322 - 6338
Web of Science type
Article
Web of Science id
000298201300004
JCR category
METEOROLOGY & ATMOSPHERIC SCIENCES
JCR impact factor
4.097 (2011)
JCR rank
7/70 (2011)
JCR quartile
1 (2011)
ISSN
0894-8755
DOI
10.1175/JCLI-D-10-05033.1
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2075906
handle
http://hdl.handle.net/1854/LU-2075906
date created
2012-03-28 11:50:52
date last changed
2016-12-19 15:42:24
@article{2075906,
  abstract     = {The Modern-Era Retrospective Analysis for Research and Applications (MERRA) is a state-of-the-art reanalysis that provides, in addition to atmospheric fields, global estimates of soil moisture, latent heat flux, snow, and runoff for 1979 present. This study introduces a supplemental and improved set of land surface hydrological fields ({\textacutedbl}MERRA-Land{\textacutedbl}) generated by rerunning a revised version of the land component of the MERRA system. Specifically, the MERRA-Land estimates benefit from corrections to the precipitation forcing with the Global Precipitation Climatology Project pentad product (version 2.1) and from revised parameter values in the rainfall interception model, changes that effectively correct for known limitations in the MERRA surface meteorological forcings. The skill (defined as the correlation coefficient of the anomaly time series) in land surface hydrological fields from MERRA and MERRA-Land is assessed here against observations and compared to the skill of the state-of-the-art ECMWF Re-Analysis-Interim (ERA-I). MERRA-Land and ERA-I root zone soil moisture skills (against in situ observations at 85 U.S. stations) are comparable and significantly greater than that of MERRA. Throughout the Northern Hemisphere, MERRA and MERRA-Land agree reasonably well with in situ snow depth measurements (from 583 stations) and with snow water equivalent from an independent analysis. Runoff skill (against naturalized stream flow observations from 18 U.S. basins) of MERRA and MERRA-Land is typically higher than that of ERA-I. With a few exceptions, the MERRA-Land data appear more accurate than the original MERRA estimates and are thus recommended for those interested in using MERRA output for land surface hydrological studies.},
  author       = {Reichle, Rolf H and Koster, Randal D and De Lannoy, Gabri{\"e}lle and Forman, Barton A and Liu, Qing and Mahanama, Sarith PP and Toure, Ally},
  issn         = {0894-8755},
  journal      = {JOURNAL OF CLIMATE},
  keyword      = {GAUGE OBSERVATIONS,FORECAST SYSTEM,SATELLITE-OBSERVATIONS,GLOBAL SOIL-MOISTURE,SNOW WATER EQUIVALENT,ERA-INTERIM REANALYSIS,DATA ASSIMILATION SYSTEM,CATCHMENT-BASED APPROACH,FORCING DATA,PRECIPITATION},
  language     = {eng},
  number       = {24},
  pages        = {6322--6338},
  title        = {Assessment and enhancement of MERRA land surface hydrology estimates},
  url          = {http://dx.doi.org/10.1175/JCLI-D-10-05033.1},
  volume       = {24},
  year         = {2011},
}

Chicago
Reichle, Rolf H, Randal D Koster, Gabriëlle De Lannoy, Barton A Forman, Qing Liu, Sarith PP Mahanama, and Ally Toure. 2011. “Assessment and Enhancement of MERRA Land Surface Hydrology Estimates.” Journal of Climate 24 (24): 6322–6338.
APA
Reichle, R. H., Koster, R. D., De Lannoy, G., Forman, B. A., Liu, Q., Mahanama, S. P., & Toure, A. (2011). Assessment and enhancement of MERRA land surface hydrology estimates. JOURNAL OF CLIMATE, 24(24), 6322–6338.
Vancouver
1.
Reichle RH, Koster RD, De Lannoy G, Forman BA, Liu Q, Mahanama SP, et al. Assessment and enhancement of MERRA land surface hydrology estimates. JOURNAL OF CLIMATE. 2011;24(24):6322–38.
MLA
Reichle, Rolf H, Randal D Koster, Gabriëlle De Lannoy, et al. “Assessment and Enhancement of MERRA Land Surface Hydrology Estimates.” JOURNAL OF CLIMATE 24.24 (2011): 6322–6338. Print.