Data Package Metadata View Summary

Soil volumetric water content calculated from neutron hydroprobe data at 15 NPP study sites at the Jornada Basin LTER, 1989-ongoing

General Information

Data Package:
Local Identifier:	knb-lter-jrn.210013003.1
Title:	Soil volumetric water content calculated from neutron hydroprobe data at 15 NPP study sites at the Jornada Basin LTER, 1989-ongoing
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	This data package contains soil water content data calculated from monthly neutron hydroprobe count measurements made at 15 net primary production (NPP) study locations on Jornada Experimental Range (JER) and Chihuahuan Desert Rangeland Research Center (CDRRC) lands. Once a month, neutron probe measurements are made at 10 depths (where possible) at each of 10 access tubes at each of the 15 NPP sites using a neutron probe (CPN Model 503DR Hydroprobe). The raw dataset, also on EDI (knb-lter-jrn.210013001), consists of the count of thermalized neutrons at 30 cm depth intervals to a maximum depth of 300 cm. In this data package, the raw neutron counts have been adjusted for radioactive decay of the neutron source, then converted to volumetric water content (VWC) to a maximum depth of 270 cm using calibration equations (deepest probe depths are excluded from VWC calculations). The NPP sites these measurements are made at represent the 5 dominant vegetation types of the Jornada Basin, which consist of 3 shrub (creosotebush, mesquite dune, and tarbush) and 2 grass (upland grassland and playa) types. Three NPP sites are located in each of the types. This data collection is ongoing with new data collected monthly (updates to the EDI package may occur less frequently).
Publication Date:	2019-09-30

Time Period

Begin:

1989-07-05

End:

2019-05-03

People and Organizations
Contact:	Manager, Data (Jornada Basin LTER) [ email ]
Contact:	Vivoni, Enrique (Arizona State University)
Contact:	Anderson, John (Jornada Basin LTER)
Creator:	Virginia, Ross (Dartmouth College)
Creator:	Duniway, Mike (USGS)
Creator:	Vivoni, Enrique (Arizona State University)

Data Entities
Data Table Name:	Soil water content calculated from neutron probe counts, by depth, at 15 NPP sites
Description:	Soil water content calculated from neutron probe counts, by depth, at 15 NPP sites
Other Name:	Neutron moisture meter calibration (derivation of VWC regression equations)
Description:	Neutron moisture meter calibration (derivation of VWC regression equations)
Other Name:	Summary figure for number 5 access tubes
Description:	Summary figure for number 5 access tubes

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210013003/1/bcdac426820d1332f3a28e6c98b8d415
Name:	Soil water content calculated from neutron probe counts, by depth, at 15 NPP sites
Description:	Soil water content calculated from neutron probe counts, by depth, at 15 NPP sites
Number of Records:	322017
Number of Columns:	11

Table Structure

Object Name:

JRNStudy013_npp_soil_water_content_calc.csv

Size:

22197645 bytes

Authentication:

b2dd5808e7e8be9b15250854ee3637b4 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Date

DateFixed

SerialNumber

Zone

Site

site_id

tube_id

Depth

CntsAdj

VWC

Definition:

Date of data collection

Nearest first-of-the-month to the date the data was collected

Serial number (last 4 digits of the Hydraprobe serial number, beginning 1992)

Vegetation zone [C, G, M, P, T]

Site code [1 of 15 NPP site codes]

Access tube site and number [First 2 digits identify vegetation zone and site (see site_id), last 2 identify access tube number (see tube_id)]

NPP site code [01-15, each mapped to a unique vegetation zone/site name]

Access tube number [ 01-10: Odd tubes = BETWEEN shrubs or perennial grasses, Even tubes = UNDER canopy of shrubs or perennial grasses ]

Depth of probe measurement (cm)

Neutron count value adjusted for radioactive decay (of Americium 241/Beryllium) since probe calibration.

Volumetric water content (cubic cm/cubic cm)

Storage Type:

date

string

float

string

float

Measurement Type:

dateTime

nominal

ratio

nominal

ratio

Measurement Values Domain:

Format	YYYY-MM-DD
Precision

Format	YYYY-MM-DD
Precision

Definition

Serial number (last 4 digits of the Hydraprobe serial number, beginning 1992)

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	C
Definition	Creosotebush
Source

Code Definition

Code	G
Definition	Grassland
Source

Code Definition

Code	P
Definition	Playa
Source

Code Definition

Code	T
Definition	Tarbush
Source

Code Definition

Code	M
Definition	Mesquite dune
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	GRAV
Definition	Gravel
Source

Code Definition

Code	SAND
Definition	Sand
Source

Code Definition

Code	CALI
Definition	Caliche
Source

Code Definition

Code	SUMM
Definition	Mt.Summerford
Source

Code Definition

Code	BASN
Definition	Basin
Source

Code Definition

Code	IBPE
Definition	IBP exclosure
Source

Code Definition

Code	SMAL
Definition	Small
Source

Code Definition

Code	COLL
Definition	College ranch
Source

Code Definition

Code	TOBO
Definition	Tobosa tank
Source

Code Definition

Code	TAYL
Definition	Taylor well
Source

Code Definition

Code	EAST
Definition	East
Source

Code Definition

Code	WEST
Definition	West
Source

Code Definition

Code	NORT
Definition	North natural vegetation exclosure
Source

Code Definition

Code	RABB
Definition	Rabbit rain gauge
Source

Code Definition

Code	WELL
Definition	West well
Source

Unit	number
Type	natural
Min	101
Max	1510

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	C-GRAV
Source

Code Definition

Code	2
Definition	C-SAND
Source

Code Definition

Code	3
Definition	C-CALI
Source

Code Definition

Code	4
Definition	G-SUMM
Source

Code Definition

Code	5
Definition	G-BASN
Source

Code Definition

Code	6
Definition	G-IBPE
Source

Code Definition

Code	7
Definition	P-SMAL
Source

Code Definition

Code	8
Definition	P-COLL
Source

Code Definition

Code	9
Definition	P-TOBO
Source

Code Definition

Code	10
Definition	T-TAYL
Source

Code Definition

Code	11
Definition	T-EAST
Source

Code Definition

Code	12
Definition	T-WEST
Source

Code Definition

Code	13
Definition	M-NORT
Source

Code Definition

Code	14
Definition	M-RABB
Source

Code Definition

Code	15
Definition	M-WELL
Source

Unit	number
Type	natural
Min	1
Max	10

Unit	centimeter
Type	natural
Min	30
Max	270

Unit	number
Type	real
Min	578.21
Max	63361.75

Unit	dimensionless
Type	real
Min	-0.11
Max	1.63

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

Neutron moisture meter calibration (derivation of VWC regression equations)

Entity Type:

unknown

Description:

Neutron moisture meter calibration (derivation of VWC regression equations)

Physical Structure Description:

Object Name:

Duniway_and_Crossland_2016_NeutronMoisture_Meter_Calibration.pdf

Size:

819587 bytes

Authentication:

79fe6eaa12429802225d1a8375225d92 Calculated By MD5

Externally Defined Format:

Format Name:

unknown

Data:

https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210013003/1/43ef6c4fca24c60a8983447f8328bd92

Non-Categorized Data Resource

Name:

Summary figure for number 5 access tubes

Entity Type:

unknown

Description:

Summary figure for number 5 access tubes

Physical Structure Description:

Object Name:

NeutronVWC_figure.png

Size:

4762449 bytes

Authentication:

bc951392816ea151dcd0ddeb9d8390e5 Calculated By MD5

Externally Defined Format:

Format Name:

unknown

Data:

https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210013003/1/23b461d91a0f2c21e4d3e8081850879d

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
JRN Dataset Keywords	Hydrology, Climate, Soils, and Atmosphere, long-term
Jornada Place Names	C-CALI, C-GRAV, C-SAND, G-BASN, G-SAND, G-SUMM, M-NORT, M-RABB, M-WELL, P-COLL, P-SMAL, P-TOBO, T-EAST, T-TAYL, T-WEST, NPP locations
Jornada Study Names	NPP, study 013
LTER Core Area	Inorganic Nutrients, Primary Production
LTER Controlled Vocabulary	soil, soil water content, soil moisture, soil water, net primary production, neutron probe

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

Monthly soil water content measurements measurements are made at 10 depths (where possible) at each of 10 probe access tubes at each of the 15 plant NPP sites. The 10 probe access tubes at each site are paired on each of the four sides and in the middle of the 70m x 70m area used for long term plant NPP measurements. At the time of access tube installation (aluminum 2 inch diameter irrigation pipe), the pairing consisted of an access tube inserted vertically into the ground midway under a shrub canopy of the dominant species and one between shrubs. For grass dominated habitats, an access tube was installed in the middle of the dominant perennial grass with the second in the bare area between grass patches. Changes in perennial plant cover through mortality or establishment may have changed this relationship for some access tubes over the years.

Measurements with the neutron hydroprobe are taken at 30cm, 60cm, 90cm, 120cm, 150cm, 180cm, 210cm, 240cm, 270cm, and 300cm when possible or to the greatest depth to which the associated access tube could be installed before hitting an impenetrable petrocalcic layer (caliche). Periodic "case standard" measurements are also taken with the probe for each measurement campaign. The hydroprobe detector totals the returning thermalized neutrons over a 16 second sample time. This raw count value is then substituted into the proper regression equation to calculate cubic centimeters of water per cubic centimeter of soil (volumetric water content - VWC). Values of VWC for the deepest available depth at each access tube are not calculated because the soil volume directly below the probe is greater, and therefore biased, relative to shallower depths.

Initial calibration regression equations were derived for the LTER-I Transect soil water content study and applied to the measurements at the NPP sites. Between 2003 and 2007 individual site regressions were developed by Mike Duniway to better represent the variation in soil characteristics. All data since initiation of the study (1989) have now been recalculated using the new equations. The raw counts of thermalized neutrons have also been adjusted to account for drift associated with the decay rate of the Americium 241/Beryllium used to generated the neutrons.

This data package provides the adjusted neutron counts, calculated VWC, and ancillary calibration information (the attached "Duniway_and_Crossland_2016_NeutronMoisture_Meter_Calibration.pdf"). The raw neutron count hydroprobe data, field methods, and measurement history are provided in a separate Jornada Basin LTER data package on EDI (knb-lter-jrn.210013001).

People and Organizations

Creators:

Individual:	Ross Virginia
Organization:	Dartmouth College
Id:	https://orcid.org/0000-0002-0890-0981

Individual:	Mike Duniway
Organization:	USGS
Id:	https://orcid.org/0000-0002-9643-2785

Individual:	Enrique Vivoni
Organization:	Arizona State University
Id:	https://orcid.org/0000-0002-2659-9459

Contacts:

Individual:

Data Manager

Organization:

Jornada Basin LTER

Email Address:

datamanager.jrn.lter@gmail.com

Individual:	Enrique Vivoni
Organization:	Arizona State University
Id:	https://orcid.org/0000-0002-2659-9459

Individual:	John Anderson
Organization:	Jornada Basin LTER
Id:	https://orcid.org/0000-0002-6417-8022

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

1989-07-05

End:

2019-05-03

Geographic Region:

Description:

NPP (and soil water) is measured at 15 sites, spanning 5 vegetation community types in the Jornada Basin. This bounding box includes all 15 sites. More precise geographic coordinates for this study may be requested from the JRN LTER Data Manager.

Bounding Coordinates:

Northern:	32.669	Southern:	32.488
Western:	-106.865	Eastern:	-106.713

Project

Parent Project Information:

Title:

Jornada Basin LTER

Personnel:

Individual:	Enrique Vivoni
Organization:	Arizona State University
Id:	https://orcid.org/0000-0002-2659-9459
Role:	Principal Investigator

Funding:

NSF: DEB-1832194

Maintenance

Maintenance:

Description:	This study is ongoing. Readings occur roughly once a month at all access tubes and sites.
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'count'
        |     |     |     |  \___attribute 'multiplierToSI' = '1'
        |     |     |     |  \___attribute 'name' = 'count'
        |     |     |     |  \___attribute 'parentSI' = 'count'
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'number of thermalized neutrons'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

Soil volumetric water content calculated from neutron hydroprobe data at 15 NPP study sites at the Jornada Basin LTER, 1989-ongoing

Data Entities

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Soil volumetric water content calculated from neutron hydroprobe data at 15 NPP study sites at the Jornada Basin LTER, 1989-ongoing

+/- Data Entities

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata