Environmental Data Initiative logo
EDI Staging Environment

Data Package Metadata   View Summary

Sap Flow in the Soil Freezing Study at the Hubbard Brook Experimental Forest, 2010

General Information
Data Package:
Local Identifier:knb-lter-hbr.250.3
Title:Sap Flow in the Soil Freezing Study at the Hubbard Brook Experimental Forest, 2010
Alternate Identifier:knb-lter-hbr.250
Alternate Identifier:DOI PLACE HOLDER
Abstract:

The climate is changing in many temperate forests with the amount of forest area dominated by sugar maple experiencing an insulating snowpack expected to shrink between 49 and 95% compared to 1951-2005 values. A reduced snowpack and increased depth and duration of soil frost can injure fine roots, which are essential for plant water uptake. Water uptake is a crucial component of ecosystem functioning because this process strongly impacts other biological processes, such as primary productivity and nutrient uptake. We evaluated the effects of changing winter climate, including snow and soil frost dynamics, by measuring sap flow rates in the Soil Freezing Study plots at the Hubbard Brook Experimental Forest.

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.

Analysis of these data are published in: Harrison, J.L., Reinmann, A.B., Maloney, A.S. et al. Transpiration of Dominant Tree Species Varies in Response to Projected Changes in Climate: Implications for Composition and Water Balance of Temperate Forest Ecosystems. Ecosystems (2020). https://doi.org/10.1007/s10021-020-00490-y

Short Name:Soil Freeze Sap Flow
Publication Date:2020-04-22
Language:English

Time Period
Begin:
2010-05-01
End:
2010-09-30

People and Organizations
Contact:Information Manager (Hubbard Brook Ecosystem Study) [  email ]
Creator:Templer, Pamela H 
Creator:Harrison, Jamie L 
Creator:Reinmann, Andy 
Creator:Socci Maloney, Anne 
Creator:Phillips, Nathan 
Creator:Juice, Stephanie m 
Creator:Webster, Alex J 

Data Entities
Data Table Name:
Hubbard Brook Soil Freeze Plot Sapflow, 2010
Description:
Hubbard Brook Soilr Freeze Plot Sapflow, 2010
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/250/3/090b56febd13439ce63aef3c1ab966d6
Name:Hubbard Brook Soil Freeze Plot Sapflow, 2010
Description:Hubbard Brook Soilr Freeze Plot Sapflow, 2010
Number of Records:144768
Number of Columns:7

Table Structure
Object Name:HubbardBrook_SoilFreezePlots_sapflow_2010.csv
Size:5937029 byte
Authentication:46394d05df69ce696a3a3416f765d6ae Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 DayTimeYearPlotTreatmentTreeInstant_Sap
Column Name:Day  
Time  
Year  
Plot  
Treatment  
Tree  
Instant_Sap  
Definition:Julian day of year in 2010Time of sample collection in EST with daylight savings observed. Data recorded every 30 minutes.Year of sample collection (2010)An integer representing plotTreatment type representing ambient snow conditions (Reference) or snow removal (Treatment)An integer representing the treeInstantaneous Sap Flow – grams of water per meter squared of sapwood per second
Storage Type:date  
date  
date  
string  
string  
string  
float  
Measurement Type:dateTimedateTimedateTimenominalnominalnominalratio
Measurement Values Domain:
FormatDDD
Precision
Formathh:mm
Precision
FormatYYYY
Precision
Definitionany text
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeReference
Definitionambient snow conditions
Source
Code Definition
CodeTreatment
Definitionsnow removal treatment
Source
Definitionany text
UnitgramPerMeterSquaredPerSecond
Typereal
Missing Value Code:              
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 StudyHBEF Soil Freezing Study, Hubbard Brook LTER, sap flow, sugar maple
LTER Network Controlled Vocabularytranspiration, water

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:

We used a constant heat-flow method (Granier 1987; Lu and others 2004) consisting of three thermal dissipation probes per tree installed at ~1.4 m height in the bole of each tree. Sap flow sensors were installed at Hubbard Brook in May 2010 (before leaf-out; n = 3 sensors per tree, evenly distributed around the bole of the tree; n = 10 trees in reference plots and n = 12 trees in snow removal plots) and left in place until late September in 2010. Each sap flow sensor consisted of two fine-wire copper constantan probes which formed a thermocouple joined at the constantan leads to determine the temperature difference (∆T) between the thermocouples as influenced by rates of sap flow. Bark was chiseled from each sensor’s location to expose the sapwood, then sensors were installed in freshly drilled holes extending 21mm into the sapwood. The heated sensor within each thermocouple had electrically insulated constantan heating wire coiled around its length, was coated with thermally conducting silicon grease, and installed in the sapwood inside of an aluminum cylinder. Each heated sensor was oriented in the sapwood approximately 10 cm above an unheated reference probe and received 200 mW power. Once installed, sap flow sensors were covered with a plastic housing affixed to the tree with acid-free silicon sealant to prevent stem flow from reaching them. To minimize temperature fluctuations due to direct solar heating, sap flow sensors were tented with Reflectix (Markleville, IN) aluminum insulated wrap. Temperatures were recorded at 30 s intervals, and 30 min averages were recorded on multichannel dataloggers (Campbell Scientific CR1000 with AM16/32 multiplexers). Sap flow per unit area sapwood per second (Js, in g H2O m-2 sapwood area s-1) was calculated using an empirical calibration equation by Granier (1987

Granier A. 1987. Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements. Tree Physiology 3:309–20. https://academic.oup.com/treephys/article-lookup/doi/10.1093/treephys/3.4.309

Lu P, Urban L, Zhao P. 2004. Granier’s thermal dissipation probe TDP method for measuring sap flow in trees: theory and practice. Acta Botanica Sinica-English Edition 466:631–46.

People and Organizations

Publishers:
Organization:Hubbard Brook Ecosystem Study
Address:
234 Mirror Lake Road,
North Woodstock, NH 03262 United States
Creators:
Individual: Pamela H Templer
Email Address:
ptempler@bu.edu
Id:https://orcid.org/0000-0002-6570-3837
Individual: Jamie L Harrison
Email Address:
harrisoj@bu.edu
Id:https://orcid.org/0000-0001-7937-0503
Individual: Andy Reinmann
Email Address:
reinmann@bu.edu
Id:https://orcid.org/0000-0002-6486-943X
Individual: Anne Socci Maloney
Email Address:
amsocci@bu.edu
Individual: Nathan Phillips
Email Address:
nathan@bu.edu
Individual: Stephanie m Juice
Email Address:
sjuice@uvm.edu
Id:https://orcid.org/0000-0002-0891-2202
Individual: Alex J Webster
Email Address:
ajwebster@ucdavis.edu
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:
2010-05-01
End:
2010-09-30
Sampling Site: 
Description:Soil Freezing Plot 1
Site Coordinates:
Longitude (degree): -71.76793Latitude (degree): 43.93409
Sampling Site: 
Description:Soil Freezing Plot 2
Site Coordinates:
Longitude (degree): -71.7683Latitude (degree): 43.93404
Sampling Site: 
Description:Soil Freezing Plot 3
Site Coordinates:
Longitude (degree): -71.76772Latitude (degree): 43.93521
Sampling Site: 
Description:Soil Freezing Plot 4
Site Coordinates:
Longitude (degree): -71.76773Latitude (degree): 43.93486
Sampling Site: 
Description:Soil Freezing Plot 5
Site Coordinates:
Longitude (degree): -71.76476Latitude (degree): 43.9279
Sampling Site: 
Description:Soil Freezing Plot 6
Site Coordinates:
Longitude (degree): -71.76492Latitude (degree): 43.92771
Sampling Site: 
Description:Soil Freezing Plot 7
Site Coordinates:
Longitude (degree): -71.76292Latitude (degree): 43.93088
Sampling Site: 
Description:Soil Freezing Plot 8
Site Coordinates:
Longitude (degree): -71.76324Latitude (degree): 43.93081

Project

Parent Project Information:

Title:Soil Freezing Study
Personnel:
Individual: Pamela Templer
Role:principalInvestigator
Funding:

Wholly or in part, by NSF grant numbers #1149929, #1637685, #1114804 (LTER-HBR), Northern States Research Cooperative, and the Andrew W. Mellon Foundation

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |        \___attribute 'abbreviation' = 'g/m2/sec'
        |     |     |        \___attribute 'id' = 'gramPerMeterSquaredPerSecond'
        |     |     |        \___attribute 'name' = 'gramPerMeterSquaredPerSecond'
        |     |     |        \___attribute 'unitType' = 'massFlux'
        |     |     |___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:

UNM logo UW-M logo