cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17897/jq5v-x761
title: GeoBasis Nuuk - Fluxmonitoring - EddyHeath

description: The EddyHeath station measures carbon dioxide fluxes via eddy covariance method at a dry heath site (26 m.a.s.l.) close to the InteractHeath (Meteorology, Soil Properties, Snow Properties; 2011-) and the former station SPA (Snow Properties; 2013-2020). The station was established in 2012 and originally instrumented with a LI7200 CO2/H2O closed-path gas analyzer (2012-2024) and Gill HS-50 sonic anemometer (2012-). In 2024 the station was upgraded with a LI7200RS CO2/H2O closed-path gas analyzer and a SmartFlux2 processing system (2024-). This dataset contains quality-controlled fluxes of CO2, LE and H; CO2- and H2O concentrations; friction velocity; wind speed and -direction. The station logs at a frequency of 10 Hz and data are aggregated as 30-minute averages (UTC-3 West Greenlandic Winter Time). From 2012 to 2023, data were collected only during the summer field season (approximately May–October) due to winter power limitations. Since 2024, continuous year-round data collection has been enabled, though occasional data gaps remain in the dark months from November to February. Fluxmonitoring:Fluxmonitoring GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.5281/zenodo.18374113
title: Polynomial Time Convergence for NP-Complete Problems via Bounded Carry Algebra: A Hierarchical Reduction Algorithm for the Subset Sum Problem

description: This paper presents a deterministic, polynomial-time algorithm (Hierarchical Carry Reduction: HCR) for the Subset Sum Problem, a classic NP-complete problem. By mapping integer sets into a vector space and analyzing carry transitions across hierarchical layers, we demonstrate that the number of active states is strictly bounded by O(n).
DOI: 10.17897/4ns0-ms69
title: GeoBasis Nuuk - Fluxmonitoring - EddyHeath_Interrim

description: This dataset is an interrim release with selected summary data produced by SmartFlux2 under default configuration settings. For corresponding, quality-controlled data, please refer to “EddyHeath” if available for the relevant period. The EddyHeath station measures carbon dioxide fluxes via eddy covariance method at a dry heath site (26 m.a.s.l.) close to the InteractHeath (Meteorology, Soil Properties, Snow Properties; 2011-) and the former station SPA (Snow Properties; 2013-2020). The station was established in 2012 and originally instrumented with a LI7200 CO2/H2O closed-path gas analyzer (2012-2024) and Gill HS-50 sonic anemometer (2012-). In 2024 the station was upgraded with a LI7200RS CO2/H2O closed-path gas analyzer and a SmartFlux2 processing system (2024-). This dataset contains non-quality-controlled fluxes of CO2, LE and H; CO2- and H2O concentrations; friction velocity; wind speed and -direction. The station logs at a frequency of 10 Hz and data are aggregated as 30-minute averages (UTC-3 West Greenlandic Winter Time). From 2012 to 2023, data were collected only during the summer field season (approximately May–October) due to winter power limitations. Since 2024, continuous year-round data collection has been enabled, though occasional data gaps remain in the dark months from November to February. Fluxmonitoring:Fluxmonitoring GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/rq96-wn83
title: GeoBasis Nuuk - Hydrology - River Water Chemistry

description: River chemistry is measured at the river outlet close to where it runs into the fiord (Kobbefjord). Measurements in the river have been done since 2009 with a frequency of 2-3 times per week. Over the monitoring period the time of sampling has varied though since 2015 sampling has been measured more consistent around 8:00 (UTC-3 WGWT). Water temperature and conductivity is measured in situ in the stream. A water sample is collected for pH analysis in the afternoon. A two-point pH calibration with pH 4 and pH 7 standards is performed before every pH measurement. Hydrology:Hydrology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/9pz3-ww15
title: GeoBasis Nuuk - Meteorology - InteractFen Meteorology

description: InteractFen (I5Nf) is one of two automatic energy balance stations in Kobbefjord that was setup in 2011. Data from the station is found under Meteorology (air temperature, relative humidity, radiation, wind, air pressure), Soil Properties (water fraction, ground water level, soil temperatures, electrical conductivity) and Snow Properties (snow temperatures, snow depht). The station is placed in the fen (40 m.a.s.l.) close to the SoilFen (Meteorology, Soil Properties), EddyFen and Methane stations (Flux Monitoring). The meteorological dataset from the station consists of air temperature and relative humidity (2018-2021: Campbell, CS215, 2021-: Vaisala, HMP155) measured in radiation shield 2 m above ground, air pressure (Setra, 278), wind speed and direction (Young, 05103), precipitation (Young, Tipping bucket 52203) and short/long wave incoming/outgoing solar radiation (KippZonen, CNR4) and NDVI (Skye, SKR1840) calculated from the formula (NIR-Red)/(NIR +Red) where Red is measured in 640nm and NIR is measured in 860 nm. All data is logged every 30 minutes (UTC-3 West Greenlandic Winter Time, CR1000X). The station is part of a network of similar energy balance stations. In Kobbefjord a comparable station is placed at the heath (I6Nh). Data comments: The station has suffered from power problems from 2015-2019 causing data gaps in autumn/winter. In June 2018 air temperature, relative humidity and wind sensors were added to the station setup. In 2018 and 2019 the Young sensor had multiple problems and data is missing in periods. An error in the logger program concerning longwave radiation in the time period 2015-06-25 to 2021-06-16 gives a slight overestimation of longwave radiation of 10-20 W/m^2, data is in the proces of being corrected. In 2020-2022 power problems caused data gaps for all measured parameters. Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/jp7f-nh56
title: GeoBasis Nuuk - Meteorology - InteractHeath Meteorology

description: InteractHeath (I6Nh) is one of two automatic energy balance stations in Kobbefjord that was setup in 2011. Data from the station is found under Meteorology (air temperature, relative humidity, radiation, wind), Soil Properties (soil moisture, soil temperatures, soil heat fluxes) and Snow Properties (snow temperatures, snow depht). It is placed at the dry heath (26 m.a.s.l.) north of Badesø, where the dominating vegetation consists of salix and empetrum, close to the Eddy Heath (Flux Monitoring) and SPA (Snow Properties) stations. The meteorological dataset from the station consists of air temperature and relative humidity (Campbell, CS215) measured in radiation shield 2 m above ground, wind speed and direction (Young, 05106), short/long wave incoming/outgoing solar radiation (KippZonen, CNR4) and NDVI (Skye, SKR1800). All data is logged every 30 minutes (UTC-3 West Greenlandic Winter Time, CR1000). The station is part of a network of similar energy balance stations. In Kobbefjord a comparable station is placed in the fen (I5Nf). Data comments: In 2012 the station was moved 20 m closer to the stream because the vegetation was damaged underneath the sensors. Since 2016 the was a problem with the NDVI sensor, and data has not been delivered. An error in the logger program concerning longwave radiation in the period 2015-06-25 to 2024-12-31 gives a slight overestimation of longwave radiation of 10-20 W/m^2, data is in the proces of being corrected. Wind direction data from 28-07-2015 and forward has been corrected for a 175° offset in the data delivery 01-05-2025. Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/0sg6-6r56
title: GeoBasis Nuuk - Meteorology - M1000

description: M1000. Since 2012 a part of ClimateBasis. The station (CR1000 logger) is running UTC-3 West Greenlandic Winter time (WGWT). The station is currently not logging any data. Please contact the ClimateBasis Nuuk manager for more information. Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/ja21-6y82
title: GeoBasis Nuuk - Meteorology - M300

description: The station, M300, was established in 2017 and is located on bare rock 300 m.a.s.l at the mountain SE of the fen close to the automatic cameras K1 and K2 (Automatic Photomonitoring). The main purpose of the station is to provide Wi-Fi connection between the Interact stations (I5Nf and I6Nh) and the field station. In 2018 an air temperature/relative humidity sensor (Campbell, CS215) was mounted at the station in a radiation shield, 2 m above ground. Data is logged every 30 minutes (UTC-3 West Greenlandic Winter Time, CR6 logger). Station had battery problems in 2018/2019 and data is missing. Due to various problems the station was closed in 2021. Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/7msk-4190
title: GeoBasis Nuuk - Meteorology - M500

description: The microclimate station, M500, was established in 2007 and is located on bare rock 500 m.a.s.l at the mountain SE of the fen close to the automatic cameras K2 and K3 (Automatic Photomonitoring). The data is logged every five minutes (UTC-3 West Greenlandic Winter Time, 2007-2024:CR1000 logger, 2024-:CR1000X). Since 2025 data is delivered as 30 min averages of the timeseries, contact the program manager for the 5 min timeseries. Sensors include air temperature and relative humidity (2007-2018: Vaisala, HMP45, 2018-: Campbell, CS215) measured in radiation shield 2 m above ground, short wave incoming solar radiation (KippZonen, SP Lite) and radiometric measured surface temperature (Apogee, IRR-P). Data comments: In 2018 the HMP45 air temperature and relative humidity sensor was changed with a CS215 sensor causing a shift in the relative humidity data. Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/bfe0-rf47
title: GeoBasis Nuuk - Meteorology - SoilFen Meteorology 1min

description: SoilFen is one of the three automatic soil stations in Kobbefjord. Data from the station is found under Meteorology (air temperature, relative humidity and PAR) and Soil Properties (soilwater chemistry, soil temperatures, soil heat flux). The station was established in 2007 and is placed in the moist fen 40 m.a.s.l. close to the InteractFen (Meteorology, Soil Properties, Snow Properties), the EddyFen and the Methane station (Fluxmonitoring). The station (CR1000 logger) is running UTC-3 West Greenlandic Winter time (WGWT). The meteorological dataset from this station consists of air temperature and relative humidity (2007-2017: Vaisala, HMP45AC, 2017-: Campbell, CS215) measured two m. above ground (see SoilFen Meteorology 5min). Until 2016, PAR (Li-190r quantum) measured 20 cm above ground, was logged every minute. PAR is also measured at the Methane Station in the Fen (Flux Monitoring) and at the Climate Stations (ClimateBasis Nuuk - Radiation) Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:
DOI: 10.17897/jsyf-kz36
title: GeoBasis Nuuk - Meteorology - SoilFen Meteorology 30min

description: SoilFen is one of the three automatic soil stations in Kobbefjord. Data from the station is found under Meteorology (air temperature, relative humidity and PAR) and Soil Properties (soilwater chemistry, soil temperatures, soil heat flux). The station was established in 2007 and is placed in the moist fen 40 m.a.s.l. close to the InteractFen (Meteorology, Soil Properties, Snow Properties), the EddyFen and the Methane station (Fluxmonitoring). The data is logged every five minutes (UTC-3 West Greenlandic Winter Time, CR1000 logger). Since datadelivery per 01-01-2025 data is delivered as 30 min averages of the 5 min timeseries, contact the program manager for the 5 min timeseries. The meteorological dataset from this station consists of air temperature and relative humidity (2007-2017: Vaisala, HMP45AC, 2017-: Campbell, CS215) measured in radiation shield two m. above ground, until 2017 PAR and sunshine hours (Delta-T, BF2). Until 2016, PAR was also measured 20 cm above ground (SoilFen Meteorology 1min), logged every minute. Data comments: In spring 2017 a fox destroyed some of the cables for the station. The air temperature/relative humidity sensor was changed from HMP45AC to CS215 in 2017. After this a shift in relative humidity is seen. Meteorology:Meteorology GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including: