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Ice Storm Experiment (ISE) Canopy Structure Data, 2015-present

General Information
Data Package:
Local Identifier:knb-lter-hbr.300.1
Title:Ice Storm Experiment (ISE) Canopy Structure Data, 2015-present
Alternate Identifier:DOI PLACE HOLDER
Abstract:

To evaluate the effects of ice storm disturbance on forest canopy structure and complexity terrestrial lidar data were collected within the Hubbard Brook Ice Storm Experiment plots starting in 2015 (prior to ice treatment) and annually thereafter. Data were collected using a ground-based portable canopy lidar (PCL) system during the growing season in August of each year along 5 permanently marked 30 m transects in each 20 x 30 m ISE plot.

These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

Publication Date:2021-04-28

Time Period
Begin:
2015-08-01
End:
2020-08-20

People and Organizations
Contact:Hubbard Brook Ecosystem Study [  email ]
Creator:Fahey, Robert TRUE (University of Connecticut)

Data Entities
Data Table Name:
ISElidar_filemanifest
Description:
manifest table describing files in .zip
Other Name:
HBISE_PCL_All_2015-2020
Description:
zip archive of canopy LiDAR files
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/300/1/df9f3f94e85c4b7a2b5236f0cafa1ef3
Name:ISElidar_filemanifest
Description:manifest table describing files in .zip
Number of Records:300
Number of Columns:7

Table Structure
Object Name:ISElidar_filemanifest.csv
Size:29517 bytes
Authentication:0e7f1061527044c1da125972aaa1ec3e Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 
Column Name:md5sum  
fileDirectory  
fileName  
year  
plot  
transect  
fileSize  
Definition:MD5 checksumfile directoryfile nameyear of collectionplot nametransect namefile size in bytes
Storage Type:string  
string  
string  
date  
string  
string  
float  
Measurement Type:nominalnominalnominaldateTimenominalnominalratio
Measurement Values Domain:
DefinitionMD5 checksum
Definitionfile directory
Definitionfile name
FormatYYYY
Precision
Definitionplot name
Definitiontransect name
Unitbytes
Typenatural
Min94262 
Max173353 
Missing Value Code:              
Accuracy Report:              
Accuracy Assessment:              
Coverage:              
Methods:              

Non-Categorized Data Resource

Name:HBISE_PCL_All_2015-2020
Entity Type:unknown
Description:zip archive of canopy LiDAR files
Physical Structure Description:
Object Name:HBISE_PCL_All_2015-2020.zip
Size:11786055 bytes
Authentication:46462d34c3ddbc0b3f4f7a1196a9d625 Calculated By MD5
Externally Defined Format:
Format Name:application/zip
Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/300/1/3aff6bfcae00b4a23f3c5599df00b1a2

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:
LTER Controlled Vocabularyecosystems, forests, watersheds, ice, storms
LTER Core Research Areadisturbance
HBES VocabularyHBR, Hubbard Brook LTER, Hubbard Brook Experimental Forest, Hubbard Brook Ecosystem Study, HBES, HBEF, New Hampshire, NH, White Mountain National Forest, ice damage, ice storm, Ice Storm Experiment, ISE, extreme weather events
ISO 19115 Topic Categorybiota, climatologyMeteorologyAtmosphere
National Research & Development TaxonomyClimate change, Climate change effects, Ecology, Ecosystems, & Environment

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:

Data were collected using a ground-based portable canopy lidar (PCL) system (Parker et al. 2004). The PCL is based on an upward looking, near infrared pulsed-laser operating at 2000 Hz (model LD90- 3100VHS-FLP; Riegl USA, Inc., Orlando, Florida, USA). Our system was mounted on a portable frame worn by the operator and positioned at 1.05m above the ground surface. The high sampling rate relative to the operator’s walking speed allows the system to record vegetative surfaces distributed at all heights throughout the canopy with high spatial resolution. Data were collected during the growing season in August of each year (2015-2020) along 5 permanently marked 30 m transects per plot spaced 5m apart. The first year of collection (2015) represents pre-treatment conditions and all others were collected following the treatment in winter 2016. In each plot, Transect 1 originated from the Southeast corner of the plot and the user traversed T1 in an E-W (plots 2, 6) or S-N (Plots 1, 3-5, 7-10) direction depending on plot orientation. Transect travel direction then alternated (i.e., T2 W-E or N-S, T3 E-W or S-N, etc.). Transects 1 and 5 border the edge of the entire 30 x 20 m ISE plot, while Transects 2 and 4 border the interior 20 x 10 m “intensive” plot. For analysis published in Fahey et al. (2020) raw PCL transect data were processed using the forestr package in R (Atkins et al. 2018). In the forestr algorithm, PCL returns are binned into 1 m2 bins with light saturation corrections made based on LiDAR return density. A suite of canopy structure metrics are then calculated that describe a variety of canopy structure metrics focused on the density, distribution, and variance of LiDAR returns along the horizontal and vertical axes of the 2D plane that transects the canopy ( Atkins et al. 2018).

Each file in the .zip archive is a comma-separated 2-column file. The columns are:

return_height meters above user height (1.05m) of return units=meters

return_intensity intensity of laser return units=unitless (0-256)

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Creators:
Individual: Robert TRUE Fahey
Organization:University of Connecticut
Email Address:
robert.fahey@uconn.edu
Contacts:
Organization:Hubbard Brook Ecosystem Study
Email Address:
hbr-im@lternet.edu

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
2015-08-01
End:
2020-08-20
Geographic Region:
Description:The Ice Storm Experiment plots located at Hubbard Brook Experimental Forest
Bounding Coordinates:
Northern:  43.9362Southern:  43.935
Western:  -71.759Eastern:  -71.756

Project

Parent Project Information:

Title:Collaborative Research: Understanding the Impacts of Ice Storms on Forest Ecosystems of the Northeastern United States
Personnel:
Individual: Charles Driscoll
Organization:Syracuse University
Email Address:
ctdrisco@syr.edu
Id:https://orcid.org/0000-0003-2692-2890
Role:Principal Investigator
Funding: NSF 1457675

Maintenance

Maintenance:
Description:ongoing
Frequency:
Other Metadata

Additional Metadata

additionalMetadata
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        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'bytes'
        |     |     |     |  \___attribute 'name' = 'bytes'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'bytes'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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