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Title: The Niwot Ridge Subalpine Forest US-NR1 AmeriFlux site – Part 1: Data acquisition and site record-keeping

Abstract

The Niwot Ridge Subalpine Forest AmeriFlux site (US-NR1) has been measuring eddy-covariance ecosystem fluxes of carbon dioxide, heat, and water vapor since 1 November 1998. Throughout this 17-year period there have been changes to the instrumentation and improvements to the data acquisition system. Here, in Part 1 of this three-part series of papers, we describe the hardware and software used for data-collection and metadata documentation. We made changes to the data acquisition system that aimed to reduce the system complexity, increase redundancy, and be as independent as possible from any network outages. Changes to facilitate these improvements were (1) switching to a PC/104-based computer running the National Center for Atmospheric Research (NCAR) In-Situ Data Acquisition Software (NIDAS) that saves the high-frequency data locally and over the network, and (2) time-tagging individual 10 Hz serial data samples using network time protocol (NTP) coupled to a GPS-based clock, providing a network-independent, accurate time base. Since making these improvements almost 2 years ago, the successful capture of high-rate data has been better than 99.98 %. Here, we also provide philosophical concepts that shaped our design of the data system and are applicable to many different types of environmental data collection.

Authors:
 [1];  [2];  [3];  [2];  [2];  [4]
  1. Univ. of Colorado, Boulder, CO (United States); National Center for Atmospheric Research, Boulder, CO (United States)
  2. National Center for Atmospheric Research, Boulder, CO (United States)
  3. Univ. of Colorado, Boulder, CO (United States)
  4. Univ. of Arizona, Tucson, AZ (United States)
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1327433
Alternate Identifier(s):
OSTI ID: 1375714
Grant/Contract Number:  
7094866
Resource Type:
Published Article
Journal Name:
Geoscientific Instrumentation, Methods and Data Systems (Online)
Additional Journal Information:
Journal Name: Geoscientific Instrumentation, Methods and Data Systems (Online); Journal Volume: 5; Journal Issue: 2; Journal ID: ISSN 2193-0864
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Burns, Sean P., Maclean, Gordon D., Blanken, Peter D., Oncley, Steven P., Semmer, Steven R., and Monson, Russell K. The Niwot Ridge Subalpine Forest US-NR1 AmeriFlux site – Part 1: Data acquisition and site record-keeping. United States: N. p., 2016. Web. doi:10.5194/gi-5-451-2016.
Burns, Sean P., Maclean, Gordon D., Blanken, Peter D., Oncley, Steven P., Semmer, Steven R., & Monson, Russell K. The Niwot Ridge Subalpine Forest US-NR1 AmeriFlux site – Part 1: Data acquisition and site record-keeping. United States. doi:10.5194/gi-5-451-2016.
Burns, Sean P., Maclean, Gordon D., Blanken, Peter D., Oncley, Steven P., Semmer, Steven R., and Monson, Russell K. Thu . "The Niwot Ridge Subalpine Forest US-NR1 AmeriFlux site – Part 1: Data acquisition and site record-keeping". United States. doi:10.5194/gi-5-451-2016.
@article{osti_1327433,
title = {The Niwot Ridge Subalpine Forest US-NR1 AmeriFlux site – Part 1: Data acquisition and site record-keeping},
author = {Burns, Sean P. and Maclean, Gordon D. and Blanken, Peter D. and Oncley, Steven P. and Semmer, Steven R. and Monson, Russell K.},
abstractNote = {The Niwot Ridge Subalpine Forest AmeriFlux site (US-NR1) has been measuring eddy-covariance ecosystem fluxes of carbon dioxide, heat, and water vapor since 1 November 1998. Throughout this 17-year period there have been changes to the instrumentation and improvements to the data acquisition system. Here, in Part 1 of this three-part series of papers, we describe the hardware and software used for data-collection and metadata documentation. We made changes to the data acquisition system that aimed to reduce the system complexity, increase redundancy, and be as independent as possible from any network outages. Changes to facilitate these improvements were (1) switching to a PC/104-based computer running the National Center for Atmospheric Research (NCAR) In-Situ Data Acquisition Software (NIDAS) that saves the high-frequency data locally and over the network, and (2) time-tagging individual 10 Hz serial data samples using network time protocol (NTP) coupled to a GPS-based clock, providing a network-independent, accurate time base. Since making these improvements almost 2 years ago, the successful capture of high-rate data has been better than 99.98 %. Here, we also provide philosophical concepts that shaped our design of the data system and are applicable to many different types of environmental data collection.},
doi = {10.5194/gi-5-451-2016},
journal = {Geoscientific Instrumentation, Methods and Data Systems (Online)},
number = 2,
volume = 5,
place = {United States},
year = {2016},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.5194/gi-5-451-2016

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Cited by: 3 works
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Works referenced in this record:

AmeriFlux US-NR1 Niwot Ridge Forest (LTER NWT1)
dataset, January 1998