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Hubbard Brook Experimental Forest (USDA Forest Service): Daily Temperature Record, 1955 – present

General Information
Data Package:
Local Identifier:knb-lter-hbr.59.9
Title:Hubbard Brook Experimental Forest (USDA Forest Service): Daily Temperature Record, 1955 – present
Alternate Identifier:DOI PLACE HOLDER
Abstract:

SAMPLING DESIGN:

Daily maximum and minimum temperatures from up to eight locations at HBEF were measured from October, 1955 through February, 2013 using mechanical hygrothermographs in weather shelters at seven locations. Six locations are in rain gage openings: 1/1A, 6, 14, 17, 23, and 24. One location is adjacent to the Headquarters building. At each station, air temperature (and usually relative humidity) was recorded by Belfort hygrothermographs housed in standard Stevenson screens, 5 feet off the ground. Standard, maximum and minimum thermometers were housed in the shelters alongside the hygrothermographs for weekly calibration checks of the current, max and min temperatures captured on the chart. The hygrothermograph charts were changed weekly, at which time the thermometers were read. Daily maximum and minimum temperatures were read manually from the charts. Correction for disagreement with the standard thermometers were seldom made as agreement is usually within 2 degrees F. The hygrothermographs were readjusted annually and rotated from site to site after lab calibration to prevent instrument bias. Maximum and minimum temperatures were converted from Fahrenheit to Celsius. Average daily temperature is calculated from the maximum and minimum.

Beginning during 2011, Campbell Scientific HMP50/60 or CS215 thermistors in six-plate Gill shields recorded daily maximum and minimum temperatures at each location. Gill shields were replaced with Apogee aspirated shields by mid-2016. Digital sensors and hygrothermographs were operated in the same clearing for an overlap period of at least one full year at all stations, and adjustments for changes in sensor and radiation shield technology were made by using linear interpolation to smooth median monthly differences to a daily scale. Prior to the transition to digital sensors, if a weather station was not operating, the value for that day was estimated from values at the other stations and was not not flagged. Currently, missing values are estimated according to linear regression with the best matched location and are indicated with a flag. Prior to the transition, the Fahrenheit to Celsius conversion and rounding to whole degrees Centigrade leads to considerable underrepresentation of -5, 0, 5, 10, etc. values. After the transition, values are rounded to the nearest 0.5 degree Centigrade. Station 24 is not included in this revision of the data because the transition to digital has not been completed.

VARIABLES:

date: format = yyyy-mm-dd

STA: values are "HQ", "STA1", "STA14", "STA17", "STA23", "STA6"

MAX: Maximum daily temperature (numeric; Celsius)

MIN: Minimum daily temperature (numeric; Celsius)

AVE: Average daily temperature (numeric; Celsius)

Flag: 0 = directly measured; 1 = estimated from nearby station; NA = not recorded (prior to the transition to digital).

Publication Date:2020-06-18

Time Period
Begin:
1957-01-01
End:
2019-12-31

People and Organizations
Contact:Hubbard Brook Ecosystem Study [  email ]
Organization:USDA Forest Service, Northern Research Station
Associate:Campbell, John (USDA Forest Service, Northern Research Station, Associated Party)
Associate:Bailey, Amey (USDA Forest Service, Northern Research Station, Associated Party)
Associate:Lany, Nina (USDA Forest Service, Northern Research Station, Associated Party)

Data Entities
Data Table Name:
HBEF daily temperature
Description:
HBEF daily temperature; min, max, avg
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/59/9/9723086870f14b48409869f6c06d6aa8
Name:HBEF daily temperature
Description:HBEF daily temperature; min, max, avg
Number of Records:105041
Number of Columns:6

Table Structure
Object Name:HBEF_air_temp_daily_1957-2019.csv
Size:3208527 bytes
Authentication:20dc550b363fa779ab220bd1e36442b3 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
 
Column Name:date  
STA  
MAX  
MIN  
AVE  
Flag  
Definition:Collection DateRain Gage NumberDaily maximum temperatureDaily maximum temperatureDaily maximum temperatureData quality flag
Storage Type:date  
string  
float  
float  
float  
string  
Measurement Type:dateTimenominalratioratiorationominal
Measurement Values Domain:
FormatYYYY-MM-DD
Precision
DefinitionRain Gage Number
Unitcelsius
Typereal
Min-29 
Max38 
Unitcelsius
Typereal
Min-36 
Max24 
Unitcelsius
Typereal
Min-32 
Max30 
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code0
Definitiondirectly measured
Source
Code Definition
Code1
Definitionestimated from nearby station
Source
Code Definition
Code“NA”
Definitionnot recorded (prior to the transition to digital)
Source
Missing Value Code:    
Code-999.9
Expldata not available
Code-999.9
Expldata not available
Code-999.9
Expldata not available
  
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:
LTER Controlled Vocabularyecosystems, forests, temperature, meteorology, weather
LTER Core Research Areadisturbance
HBES VocabularyHBR, Hubbard Brook LTER, New Hampshire, NH
National Research & Development TaxonomyEcology, Ecosystems, & Environment
ISO 19115 Topic CategoryclimatologyMeteorologyAtmosphere

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:

Air temperature is measured at seven locations in rain gage clearings throughout the experimental watersheds and at Headquarters. The oldest air temperature record dates back to October 20,1955 at Station 1. From 1955 - 2014, temperature measurements were made continuously using hygrothermographs housed in standard shelters. Beginning in 2014, digital sensors housed in solar radiation shields collected daily minimum and maximum temperature measurements. Measurements made by the hygrothermographs have been corrected for screen bias to match the current aspirated radiation shields.

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.

Publications related to this dataset:

Bailey, Amey Schenck; Hornbeck, James W.; Campbell, John L.; Eagar, Christopher. 2003. Hydrometeorological database for Hubbard Brook Experimental Forest: 1955-2000. Gen. Tech. Rep. NE-305. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 36 p.

People and Organizations

Creators:
Organization:USDA Forest Service, Northern Research Station
Contacts:
Organization:Hubbard Brook Ecosystem Study
Email Address:
hbr-im@lternet.edu
Associated Parties:
Individual: John Campbell
Organization:USDA Forest Service, Northern Research Station
Email Address:
john.campbell2@usda.gov
Id:https://orcid.org/0000-0003-4956-1696
Role:Associated Party
Individual: Amey Bailey
Organization:USDA Forest Service, Northern Research Station
Email Address:
amey.bailey@usda.gov
Id:https://orcid.org/0000-0003-3848-8550
Role:Associated Party
Individual: Nina Lany
Organization:USDA Forest Service, Northern Research Station
Email Address:
nina.lany@usda.gov
Id:https://orcid.org/0000-0003-0868-266X
Role:Associated Party

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
1957-01-01
End:
2019-12-31
Geographic Region:
Description:Hubbard Brook Experimental Forest
Bounding Coordinates:
Northern:  43.959Southern:  43.914
Western:  -71.8062Eastern:  -71.7022

Project

Parent Project Information:

Title:Hubbard Brook Long Term Meteorological Data Collection
Personnel:
Organization:USDA Forest Service, Northern Research Station
Role:Principal Investigator
Funding: USDA Forest Service Northern Research Station

Maintenance

Maintenance:
Description:ongoing
Frequency:
Other Metadata

Additional Metadata

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