Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Ice Storm Experiment Trace Gas

General Information

Data Package:
Local Identifier:	knb-lter-hbr.245.5
Title:	Hubbard Brook Experimental Forest: Ice Storm Experiment Trace Gas
Alternate Identifier:	knb-lter-hbr.245
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Trace gas fluxes were measured using the in situ chamber design similar to that described by Bowden and others (1990, 1991). Static gas soil sampling chambers (four per plot) of 20 cm diameter (ID) polyvinyl chloride (PVC) were placed on permanently installed PVC base rings immediately prior to measurement. At 0, 10, 20, and 30 min following placement of the chamber on the base, 8-mL gas samples were collected from gas sampling ports in the center of the chamber top by syringe. Samples were transferred to evacuated glass vials and stored at room temperature prior to analysis by gas chromatography (GC). CO2, N2O, and CH4 were analyzed on a Shimadzu GC-14 GC with thermal conductivity (CO2), electron capture (N2O), and flame ionization (CH4) detectors. These GC’s were capable of detecting ambient levels of these gases. Fluxes were calculated from the linear rate of change in gas concentration, the chamber internal volume and soil surface area. Flux rate calculations were not corrected for actual in situ temperature and pressure. Single points were removed from regressions if they were more than six times higher or lower than the other three values or if they contradicted a clear trend in the other three points. This procedure prevents inclusion of high flux rates based on non-significant regressions. Non-significant regressions were used in flux calculations to avoid biasing the statistical distribution of rates by setting all non-significant regressions to zero. Gas samples were collected prior to any icing treatment in September and October 2015, and then for 2 years after the icing treatments were initially applied (1st icing: 1/27/16; 2nd icing, only in MIDx2 plots: 1/14/17) in August 2016, July 2017, and October 2017.
Short Name:	ISE Trace Gas
Publication Date:	2019-11-08
Language:	English

Time Period

Begin:

2015-09-01

End:

2017-10-31

People and Organizations
Contact:	Information Manager (Hubbard Brook Ecosystem Study) [ email ]
Creator:	Groffman, Peter M
Creator:	Weitzman, Julie
Creator:	Martel, Lisa

Data Entities
Data Table Name:	HBEF Ice Storm Trace Gas Data
Description:	HBEF Ice Storm Trace Gas Data

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/245/5/7945c26e0b7873c02b35e6dc539c16a7
Name:	HBEF Ice Storm Trace Gas Data
Description:	HBEF Ice Storm Trace Gas Data
Number of Records:	200
Number of Columns:	11

Table Structure

Object Name:

HBEF_Ice_Storm_Trace_Gas_Data.csv

Size:

8936 byte

Authentication:

c324b5d2bd2d70fc11078952d185c91f Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Project name

Sample year

Sample date

Icing Year

Season sample collected

Icing Treatment

Sample plot location

Individual flux chamber

Carbon dioxide flux as grams of C

Nitrous oxide flux as nanograms of N

Methane flux as milligrams of CH4

Column Name:

Project

Year

Month

TrtYr

Season

Treatment

Plot

Chamber

CO2

N2O

CH4

Definition:

Project name

Sample year

Sample date

Icing Year

Season sample collected

Icing Treatment

Sample plot location

Individual flux chamber

Carbon dioxide flux as grams of C

Nitrous oxide flux as nanograms of N

Methane flux as milligrams of CH4

Storage Type:

string

date

string

float

Measurement Type:

nominal

dateTime

nominal

ratio

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	ISE
Definition	Ice Storm Experiment
Source

Format	YYYY
Precision

Definition

any text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	Pre-treatment (2015)
Source

Code Definition

Code	1
Definition	Post-treatment, Yr1 (2016)
Source

Code Definition

Code	2
Definition	Post-treatment, Yr2 (2017)
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	F
Definition	Fall
Source

Code Definition

Code	W
Definition	Winter
Source

Code Definition

Code	SP
Definition	Spring
Source

Code Definition

Code	SU
Definition	Summer
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	CONTROL
Definition	0.0 mm
Source

Code Definition

Code	LOW
Definition	6.4 mm
Source

Code Definition

Code	MID
Definition	12.7 mm
Source

Code Definition

Code	MIDx2
Definition	12.7 mm in Year1 & Year2
Source

Code Definition

Code	HIGH
Definition	19 mm
Source

Definition

any text

Definition

any text

Unit	gramsPerMeterSquaredPerHour
Type	real

Unit	nanogramPerCentimeterSquaredPerHour
Type	real

Unit	milligramPerMeterSquaredPerDay
Type	real

Missing Value Code:

Code	-9999.99
Expl	Data missing or not taken at this time

Code	-9999.99
Expl	Data missing or not taken at this time

Code	-9999.99
Expl	Data missing or not taken at this time

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

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:
Hubbard Brook Ecosystem Study	HBEF ISE Plots, HBR, ice damage, ice storm, trace gas
LTER Network Controlled Vocabulary	carbon dioxide, ecosystems, flux, forests, gases, inorganic nitrogen, methane, nitrous oxide, soil
LTER Network Core Research Areas	disturbance, primary production

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:

As the climate changes, it is thought that ice storms will begin to occur with increasing frequency. This project evaluates the damage and changes ice storms cause to northern hardwood forests in nutrient cycling. Ten 20x30 meter plots were established in a predominately sugar maple stand, with 4 icing treatments and 2 control plots. This data set includes soil:atmosphere fluxes of the trace gases carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4) monitored in the Ice Storm Experiment plots at the Hubbard Brook Experimental Forest from 2015-2017.

People and Organizations

Publishers:

Organization:

Hubbard Brook Ecosystem Study

Address:

234 Mirror Lake Road,

North Woodstock, NH 03262 United States

Creators:

Individual:

Peter M Groffman

Email Address:

GroffmanP@caryinstitute.org

Id:

https://orcid.org/0000-0001-8371-6255

Individual:

Julie Weitzman

Email Address:

julie.weitzman@gc.cuny.edu

Id:

https://orcid.org/0000-0002-6554-4776

Individual:	Lisa Martel
Id:	https://orcid.org/0000-0002-0156-4954

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Position:

Information Manager

Address:

234 Mirror Lake Road,

North Woodstock, NH 03262 United States

Email Address:

hbr-im@lternet.edu

Web Address:

https://hubbardbrook.org

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2015-09-01

End:

2017-10-31

Geographic Region:

Description:

The Ice Storm Experiment plots located at Hubbard Brook Experimental Forest

Bounding Coordinates:

Northern:	43.9362	Southern:	43.935
Western:	-71.7592	Eastern:	-71.7557

Project

Parent Project Information:

Title:

LTER: Long-term ecological research at the Hubbard Brook Experimental Forest and Collaborative Research: Understanding the Impacts of Ice Storms on Forest Ecosystems of the Northeastern United States

Personnel:

Individual:	Gary Lovett
Role:	principalInvestigator

Individual:	Peter Groffman
Role:	Co-Investigator

Individual:	Timothy Fahey
Role:	principalInvestigator

Individual:	Charles Driscoll
Role:	principalInvestigator

Funding:

Wholly or in part by NSF LTER #1637685 and #1114804 (Fahey, Groffman, Lovett) and NSF #1457675 (Driscoll)

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'g/m^2/hr'
        |     |     |     |  \___attribute 'id' = 'gramsPerMeterSquaredPerHour'
        |     |     |     |  \___attribute 'multiplierToSI' = '0.0000166667'
        |     |     |     |  \___attribute 'name' = 'gramsPerMeterSquaredPerHour'
        |     |     |     |  \___attribute 'parentSI' = 'kilogramsPerMeterSquaredPerSecond'
        |     |     |     |  \___attribute 'unitType' = 'arealMassDensityRate'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'grams per meter square per hour'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'mg m-2 d-1'
        |     |     |     |  \___attribute 'constantToSI' = '0'
        |     |     |     |  \___attribute 'id' = 'milligramPerMeterSquaredPerDay'
        |     |     |     |  \___attribute 'name' = 'milligramPerMeterSquaredPerDay'
        |     |     |     |  \___attribute 'parentSI' = 'kilogramPerMeterSquaredPerSecond'
        |     |     |     |  \___attribute 'unitType' = 'areaMassDensityRate'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'an areal flux unit. often used for a primary production rate, e.g., for an integrated water column. May have context of dry weight, or specific to an element, e.g., carbon'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'nanogramPerCentimeterSquaredPerHour'
        |     |     |        \___attribute 'name' = 'nanogramPerCentimeterSquaredPerHour'
        |     |     |        \___attribute 'unitType' = 'massFlux'
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Ice Storm Experiment Trace Gas

Data Entities

Data Table

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:

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Ice Storm Experiment Trace Gas

+/- Data Entities

Data Table

+/- 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:

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Additional Metadata