Short Name:

SMERGE_RZSM0_40CM

Smerge-Noah-CCI root zone soil moisture 0-40 cm L4 daily 0.125 x 0.125 degree V2.0 (SMERGE_RZSM0_40CM) at GES DISC

Smerge-Noah-CCI root zone soil moisture 0-40 cm L4 daily 0.125 x 0.125 degree V2.0 is a multi-decadal root-zone soil moisture product. Smerge is developed by merging the North American Land Data Assimilation System (NLDAS) land surface model output with surface satellite retrievals from the European Space Agency Climate Change Initiative. The data have a 0.125 degree resolution at a daily time-step, covering the entire continental United States and spanning nearly four decades (January 1979 to May 2019). This data product contains root-zone soil moisture of 0 - 40 cm layer, CCI derived soil moisture anomalies of 0-40 cm layer, and a soil moisture data estimation flag.

Overview Download Data Services Tools Citation Information Documentation Additional Information

Science Keywords:

Spatial Extent:

Bounding Rectangle:

N: 53 S: 25 E: -67 W: -125

Data Format(s):

Distribution: netCDF

Temporal Extent:

1979-01-02 to now

Platform(s):

Noah-LSM

Data Center(s):

NASA/GSFC/SED/ESD/GCDC/GESDISC

Instrument(s):

NOT APPLICABLE

Version:

2.0

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Title: Smerge-Noah-CCI root zone soil moisture 0-40 cm L4 daily 0.125 x 0.125 degree V2.0
Version: 2.0
Creator: Crow, Wade (USDA ARS) and K. Tobin (Texas A&M IU)
Publisher: Goddard Earth Sciences Data and Information Services Center (GES DISC)
Release Date: 2018-11-16T00:00:00.000Z
Linkage: https://disc.gsfc.nasa.gov/datacollection/SMERGE_RZSM0_40CM_2.0.html

DOI

10.5067/PAVQY1KHTMUT

READ-ME: https://hydro1.gesdisc.eosdis.nasa.gov/data/SMERGE/SMERGE_RZSM0_40CM.2.0/doc/README_SMERGE2.pdf, README Document
HOW-TO: https://disc.gsfc.nasa.gov/information/howto?tags=hydrology, How to read and plot the data.

Version Description
SMERGE version 2.0 is an improvement of the previous version (v1.0) of the dataset. The main differences between SMERGE v1.0 and SMERGE v2.0 are the addition of a new variable, CCI derived soil moisture anomalies of 0-40 cm layer, and an additional year of data for 2016.
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Data Dates

Creation	2018-11-01T00:00:00.000Z
Last Revision	2018-11-01T00:00:00.000Z

Processing Level

Quality The data are provisional and subject to change as model improvements are implemented and new input data sets become available.

Collection Progress
Complete
Use Constraints
The Earth Observing System Data and Information System (EOSDIS) data use policy for NASA data can be accessed at https://earthdata.nasa.gov/earth-observation-data/data-use-policy. For information on how to properly cite and acknowledge data from the NASA GES DISC, refer to https://disc.gsfc.nasa.gov/information/documents?title=data-policy.
Access Constraints

None

Publication References

Title: Validation of a New Root-Zone Soil Moisture Product: Soil MERGE

Publication Date: 2019-01-01

Author(s): Tobin, K. J., W. T. Crow, J. Dong, and M. E. Bennett

Series: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

Volume: 12

Pages: 3351-3365

DOI: 10.1109/JSTARS.2019.2930946
Title: Multi-decadal analysis of root-zone soil moisture applying the exponential filter across CONUS

Publication Date: 2017-01-01

Author(s): Tobin, K.J., R. Torres, W. Crow, and M.E. Bennett

Series: Hydrol. Earth Syst. Sci.

Volume: 21

Pages: 4403-4417

DOI: 10.5194/hess-21-4403-2017

Related URLs

Ancillary Keywords

Hydrology

ISO Topic Categories

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Projects

Project Short Name	Campaigns	Project Dates
SMERGE	No campaigns listed.	No dates provided.

Coverage Type	Zone Identifier	Geometry	Granule Representation
HORIZONTAL		CARTESIAN	CARTESIAN

Location Keywords

- CONTINENT
- NORTH AMERICA

NASA/GSFC/SED/ESD/GCDC/GESDISC
ARCHIVER

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
NASA GES DISC Website
https://disc.gsfc.nasa.gov/

Home Page

Hualan Rui
Metadata Author

Hualan Rui
- Goddard Earth Sciences Data and Information Services Center
  Code 610.2
  NASA Goddard Space Flight Center
  Greenbelt, MD 20771
301-614-5200

301-614-5268

Email
GES DISC HELP DESK SUPPORT GROUP
Data Center Contact

GES DISC HELP DESK SUPPORT GROUP
NASA/GSFC/SED/ESD/GCDC/GESDISC
- Goddard Earth Sciences Data and Information Services Center
  Code 610.2
  NASA Goddard Space Flight Center
  Greenbelt, MD 20771
301-614-5224

301-614-5268

Email

Metadata Dates

Creation	2018-10-12T00:00:00.000Z
Last Revision	2020-05-20T00:00:00.000Z

File Distribution Information

Format: netCDF

Format Type: Native

Media: Online Archive

Fees: No Fee

There is no direct distribution information for this collection.

CMR Search

Smerge-Noah-CCI root zone soil moisture 0-40 cm L4 daily 0.125 x 0.125 degree V2.0 (SMERGE_RZSM0_40CM) at GES DISC

Collection Information

Data Identification

Data Dates

Publication References

Related URLs

Other Descriptive Keywords

Ancillary Keywords

ISO Topic Categories

Acquisition Information

Projects

Temporal Information

Spatial Information

Location Keywords

Data Centers

NASA/GSFC/SED/ESD/GCDC/GESDISC

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Contacts

Hualan Rui

Hualan Rui

GES DISC HELP DESK SUPPORT GROUP

GES DISC HELP DESK SUPPORT GROUP

Metadata Dates

Archive And Distribution Information

File Distribution Information