P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: dab96eac-c1e4-11e9-8f49-000c29fb4a96
  Parent Event ID: 78b4c836-c663-11e9-8f49-000c29fb4a96
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Primary production (14C-CO2)
  Sampling protocol: N uptake to be included in version 5
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Meltpond Chla 1

  Source document: AeN_Q3_Marti_Logsheet.xlsx

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: e25cbd6a-c0e7-11e9-8f49-000c29fb4a96
  Parent Event ID: 78b4c836-c663-11e9-8f49-000c29fb4a96
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Isotopes
  Sampling protocol: N uptake to be included in version 5
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Meltpond Isotopes 2

  Source document: AeN_Q3_Marti_Logsheet.xlsx

  intendedMethod: N uptake
  

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: e1501ae8-c0e7-11e9-8f49-000c29fb4a96
  Parent Event ID: 78b4c836-c663-11e9-8f49-000c29fb4a96
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Isotopes
  Sampling protocol: N uptake to be included in version 5
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Meltpond Isotopes 1

  Source document: AeN_Q3_Marti_Logsheet.xlsx

  intendedMethod: N uptake
  

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: c9bbe632-c0e7-11e9-8f49-000c29fb4a96
  Parent Event ID: 78b4c836-c663-11e9-8f49-000c29fb4a96
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Isotopes
  Sampling protocol: N uptake to be included in version 5
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Meltpond Light Nitrate 1

  Source document: AeN_Q3_Marti_Logsheet.xlsx

  intendedMethod: N uptake
  

• Biology sea-ice samples

  Event ID: 3c3e47e8-8916-11e9-8a84-a0481c9e7d26
  Parent Event ID: ef09b2f0-b5ec-11e9-acd1-a0481c9e7d26
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Ice core
  Sampling protocol: AeN protocols version 4_section14
  Bottom depth (m): 797.07
  Person of Interest
  Show more metadata

  Biology sea-ice samples

  pi_name: Anna Vader
  

  Abstract

  Overview of samples taken from ice, including ice-cores, under-ice water (UIW) and meltponds

  
  pi_email: annav@unis.no
  projectID: The Nansen Legacy (RCN # 276730)
  pi_address: Forskningsparken, 9170 Longyearbyen
  recordedBy: Anna Vader, Miriam Marquardt,
  pi_institution: UNIS
  

  Created: 2020-05-06T13:42:30

  Modified: 2020-05-06T13:42:30

  History: 2020-05-06T13:42:30Z: Initial read in of the log files.

  Source document: AeN_2019706_icesamples_all_AnnaVader260819.xlsx

• Biology sea-ice samples

  Event ID: 3c3e480b-8916-11e9-8a84-a0481c9e7d26
  Parent Event ID: ef09b2f0-b5ec-11e9-acd1-a0481c9e7d26
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Protist diversity >10 um
  Sampling protocol: AeN protocols version 4_section14
  Bottom depth (m): 797.07
  Person of Interest
  Show more metadata

  Biology sea-ice samples

  pi_name: Anna Vader
  

  Abstract

  Overview of samples taken from ice, including ice-cores, under-ice water (UIW) and meltponds

  
  pi_email: annav@unis.no
  projectID: The Nansen Legacy (RCN # 276730)
  pi_address: Forskningsparken, 9170 Longyearbyen
  recordedBy: Anna Vader, Miriam Marquardt,
  pi_institution: UNIS
  

  Created: 2020-05-06T13:42:30

  Modified: 2020-05-06T13:42:30

  History: 2020-05-06T13:42:30Z: Initial read in of the log files.

  Source document: AeN_2019706_icesamples_all_AnnaVader260819.xlsx

  Child events

  Event ID	Event datetime	Cruise number	Bottle number	Bottom depth (m)	Sample depth (m)	Station name ref	Gear Type	PI Name	PI Institution
  f3f51bcc-c118-11e9-8f49-000c29fb4a96	2019-08-17T16:30:00Z	2019706		797.07		P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)		Bente Edvardsen	University of Oslo
  0e1f29b6-c119-11e9-8f49-000c29fb4a96	2019-08-17T16:30:00Z	2019706		797.07		P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)		Bente Edvardsen	University of Oslo
  eebf9574-c118-11e9-8f49-000c29fb4a96	2019-08-17T16:30:00Z	2019706		797.07		P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)		Bente Edvardsen	University of Oslo
  e99d9b68-c118-11e9-8f49-000c29fb4a96	2019-08-17T16:30:00Z	2019706		797.07		P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)		Bente Edvardsen	University of Oslo

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: c0f37908-c0e6-11e9-8f49-000c29fb4a96
  Parent Event ID: 3c3e47d7-8916-11e9-8a84-a0481c9e7d26
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Primary production (14C-CO2)
  Sampling protocol: 7.23
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Pvs I Under ice

  Source document: AeN_Q3_Marti_Logsheet.xlsx

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: bfa750e2-c0e6-11e9-8f49-000c29fb4a96
  Parent Event ID: 3c3e47d7-8916-11e9-8a84-a0481c9e7d26
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Primary production (14C-CO2)
  Sampling protocol: 7.23
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Pvs I Under ice

  Source document: AeN_Q3_Marti_Logsheet.xlsx

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: bd1da6d2-c0e6-11e9-8f49-000c29fb4a96
  Parent Event ID: 3c3e47d7-8916-11e9-8a84-a0481c9e7d26
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Primary production (14C-CO2)
  Sampling protocol: 7.23
  Gear type: CTD w/bottles
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Pvs I Under ice

  Source document: AeN_Q3_Marti_Logsheet.xlsx

• Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  Event ID: ea2b9062-c0e6-11e9-8f49-000c29fb4a96
  Parent Event ID: 3c3e47d7-8916-11e9-8a84-a0481c9e7d26
  Event date: 2019-08-17T16:30:00
  Station: P6 (NLEG21/NPAL15) Ice (2019 Seasonal Study Q3)
  Location: 81° 31' 58" N , 30° 58' 6" E
  Cruise number: 2019706
  Cruise name: 2019 Seasonal Study Q3
  Sampletype: Primary production (14C-CO2)
  Sampling protocol: 7.23
  Bottom depth (m): 797.07
  Person of Interest

  Name: Rolf Gradinger

  Email: rolf.gradinger@uit.no

  Institution: University of Tromsø
  Show more metadata

  Seasonality in primary production, Nitrogen sources for primary production and primary producers response to light intensity

  pi_name: Rolf Gradinger
  

  Abstract

  Several functional aspects of pelagic and simpagic primary producers were studied during the Nansen Legacy Q3 cruise. In open water stations (P1, P4, P5), water was sampled from the standard depths 10, 20, 40, 60, 90 and Chl a max. Water from these depths was spiked with radioactively labelled carbon in order to determine to the Carbon fixation rate (i.e. the Primary Production rate) of phototrophic organisms throughout the water column and latitudinal gradient. Additionally, water from 10m and Chla max was spiked with stable isotopes of Carbon (13C) and Nitrogen (15N) to determine the F-ratio (which fraction of the estimated primary production is new production). One incubation bottle was also treated to assess the nitrification activity of microbes. These incubations were deployed attached to the sediment trap moorings and exposed to in situ light and temperature conditions for 24 hours. In parallel, water from the Chla max was used to determine the photosynthetic response of the community to light intensity (P vs I curves). At the ice-covered stations (P6 and P7), the aforementioned water sampling and experimental work was carried as described, and additionally the bottom 3cm of 4 ice cores were sampled and pooled for similar in situ incubations: Under-ice Primary production, Nitrogen uptake and PvsI curve. Water from a meltpond was sampled, spiked and incubated in situ for Primary Production and Nitrogen uptake. A reciprocal transplant experiment was conducted with surface water from stations P1 and P6 and will be analyzed for abundance and community shifts due to changes in environmental factors.

  
  pi_email: rolf.gradinger@uit.no
  projectID: RCN #276730
  pi_address: Muninbakken 21, 9009 Tromsø
  recordedBy: Martí Amargant-Arumí
  pi_institution: UiT the Arctic University of Norway
  

  Created: 2020-05-06T13:42:25

  Modified: 2021-08-12T12:31:54

  History: 2020-05-06T13:42:25Z: Initial read in of the log files. 2021-08-12T12:31:54Z: Standardising PI email and institutions

  Event remarks: Pvs I Under ice

  Source document: AeN_Q3_Marti_Logsheet.xlsx