Summertime net ecosystem exchange, ecosystem respiration flux and sources
The multifactorial experiment, established in 2003, consists of a control and three treatments: +4 degrees C warming; wetting; and +4 degrees C warming × wetting. The warming treatment was based on temperature models to mimic ~2050. Irrigation treatments increase growing season precipitation by appr...
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Arctic Data Center
2014
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Online Access: | https://doi.org/10.18739/A28S5G |
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dataone:doi:10.18739/A28S5G 2024-06-03T18:46:52+00:00 Summertime net ecosystem exchange, ecosystem respiration flux and sources M. Lupascu J. M. Welker U. Seibt K. Maseyk X. Xu Claudia I. Czimczik NORTH AMERICA > GREENLAND ENVELOPE(68.83,68.83,76.53,76.53) BEGINDATE: 2010-05-01T00:00:00Z ENDDATE: 2012-08-31T00:00:00Z 2014-01-13T00:00:00Z https://doi.org/10.18739/A28S5G unknown Arctic Data Center EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > RESPIRATION RATE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL GAS/AIR EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > SOIL TEMPERATURE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL RESPIRATION IN SITU/LABORATORY INSTRUMENTS > CHEMICAL METERS/ANALYZERS > CO2 ANALYZERS IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE OBSERVATORY AUTOMATED SURFACE OBSERVING SYSTEM POINT LESS THAN 1 METER 1 MINUTE TO 1 HOUR environment Dataset 2014 dataone:urn:node:ARCTIC https://doi.org/10.18739/A28S5G 2024-06-03T18:08:13Z The multifactorial experiment, established in 2003, consists of a control and three treatments: +4 degrees C warming; wetting; and +4 degrees C warming × wetting. The warming treatment was based on temperature models to mimic ~2050. Irrigation treatments increase growing season precipitation by approximately 50% relative to 1971-2000. Measurements were conducted from the end of May to the end of August. NEE was measured with automated clear chambers coupled to a Picarro G1301 analyser. GPP was calculated by the difference between NEE and Reco. Ecosystem respiration and soil pore space CO2 concentrations were measured at least three times a week with infrared gas analysers. Ecosystem respiration was measured using opaque chambers, and soil CO2 concentrations were measured using stainless-steel gas wells inserted throughout the active layer. Gas samples for 14C analysis were collected monthly. Ecosystem respiration, CO2 in ambient air and root-respired CO2 were captured on molecular sieve traps. Roots were manually extracted, rinsed and incubated in CO2-free air for 24 h. Soil gas was collected in pre-evacuated canisters using flow-restricting capillaries. Concentrations of organic C along the soil profile were measured by elemental analysis. For 14C analysis, CO2 was released from molecular sieve traps by heating at 650 degrees C for 45 min or extracted from canisters on a vacuum line, purified cryogenically and reduced to graphite through zinc reduction and analysed at UC Irvine's W. M. Keck Carbon Cycle Accelerator Mass Spectrometer facility28. Soil samples were first combusted to CO2 in pre-combusted, evacuated quartz tubes with cupric oxide for 2 h at 900 degrees C. We used a two-pool mixing model29 to estimate the contributions from older, below-ground permafrost soil C versus young, surface soil C to Reco. data for paper and figures in DOI: 10.1038/NCLIMATE2058 Dataset Greenland permafrost Arctic Data Center (via DataONE) Greenland ENVELOPE(68.83,68.83,76.53,76.53) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > RESPIRATION RATE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL GAS/AIR EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > SOIL TEMPERATURE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL RESPIRATION IN SITU/LABORATORY INSTRUMENTS > CHEMICAL METERS/ANALYZERS > CO2 ANALYZERS IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE OBSERVATORY AUTOMATED SURFACE OBSERVING SYSTEM POINT LESS THAN 1 METER 1 MINUTE TO 1 HOUR environment |
spellingShingle |
EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > RESPIRATION RATE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL GAS/AIR EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > SOIL TEMPERATURE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL RESPIRATION IN SITU/LABORATORY INSTRUMENTS > CHEMICAL METERS/ANALYZERS > CO2 ANALYZERS IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE OBSERVATORY AUTOMATED SURFACE OBSERVING SYSTEM POINT LESS THAN 1 METER 1 MINUTE TO 1 HOUR environment M. Lupascu J. M. Welker U. Seibt K. Maseyk X. Xu Claudia I. Czimczik Summertime net ecosystem exchange, ecosystem respiration flux and sources |
topic_facet |
EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > RESPIRATION RATE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL GAS/AIR EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > SOIL TEMPERATURE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL RESPIRATION IN SITU/LABORATORY INSTRUMENTS > CHEMICAL METERS/ANALYZERS > CO2 ANALYZERS IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE OBSERVATORY AUTOMATED SURFACE OBSERVING SYSTEM POINT LESS THAN 1 METER 1 MINUTE TO 1 HOUR environment |
description |
The multifactorial experiment, established in 2003, consists of a control and three treatments: +4 degrees C warming; wetting; and +4 degrees C warming × wetting. The warming treatment was based on temperature models to mimic ~2050. Irrigation treatments increase growing season precipitation by approximately 50% relative to 1971-2000. Measurements were conducted from the end of May to the end of August. NEE was measured with automated clear chambers coupled to a Picarro G1301 analyser. GPP was calculated by the difference between NEE and Reco. Ecosystem respiration and soil pore space CO2 concentrations were measured at least three times a week with infrared gas analysers. Ecosystem respiration was measured using opaque chambers, and soil CO2 concentrations were measured using stainless-steel gas wells inserted throughout the active layer. Gas samples for 14C analysis were collected monthly. Ecosystem respiration, CO2 in ambient air and root-respired CO2 were captured on molecular sieve traps. Roots were manually extracted, rinsed and incubated in CO2-free air for 24 h. Soil gas was collected in pre-evacuated canisters using flow-restricting capillaries. Concentrations of organic C along the soil profile were measured by elemental analysis. For 14C analysis, CO2 was released from molecular sieve traps by heating at 650 degrees C for 45 min or extracted from canisters on a vacuum line, purified cryogenically and reduced to graphite through zinc reduction and analysed at UC Irvine's W. M. Keck Carbon Cycle Accelerator Mass Spectrometer facility28. Soil samples were first combusted to CO2 in pre-combusted, evacuated quartz tubes with cupric oxide for 2 h at 900 degrees C. We used a two-pool mixing model29 to estimate the contributions from older, below-ground permafrost soil C versus young, surface soil C to Reco. data for paper and figures in DOI: 10.1038/NCLIMATE2058 |
format |
Dataset |
author |
M. Lupascu J. M. Welker U. Seibt K. Maseyk X. Xu Claudia I. Czimczik |
author_facet |
M. Lupascu J. M. Welker U. Seibt K. Maseyk X. Xu Claudia I. Czimczik |
author_sort |
M. Lupascu |
title |
Summertime net ecosystem exchange, ecosystem respiration flux and sources |
title_short |
Summertime net ecosystem exchange, ecosystem respiration flux and sources |
title_full |
Summertime net ecosystem exchange, ecosystem respiration flux and sources |
title_fullStr |
Summertime net ecosystem exchange, ecosystem respiration flux and sources |
title_full_unstemmed |
Summertime net ecosystem exchange, ecosystem respiration flux and sources |
title_sort |
summertime net ecosystem exchange, ecosystem respiration flux and sources |
publisher |
Arctic Data Center |
publishDate |
2014 |
url |
https://doi.org/10.18739/A28S5G |
op_coverage |
NORTH AMERICA > GREENLAND ENVELOPE(68.83,68.83,76.53,76.53) BEGINDATE: 2010-05-01T00:00:00Z ENDDATE: 2012-08-31T00:00:00Z |
long_lat |
ENVELOPE(68.83,68.83,76.53,76.53) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland permafrost |
genre_facet |
Greenland permafrost |
op_doi |
https://doi.org/10.18739/A28S5G |
_version_ |
1800872337703174144 |