Julie Granger

Affiliation:

University of Connecticut (UConn)

Address:

Department of Marine Sciences
1080 Shenecossett Road
Groton, CT
USA 06340

ORCiD:

0000-0001-9985-9242

Activities reported for Julie Granger:

Program coordination

None

Project coordination

The Ocean Nitrogen Imbalance Paradox: Environmental Controls on the Denitrification Isotope Effect (15N2 Contamination)	Principal Investigator, Contact
Collaborative Research: GEOTRACES Arctic Ocean section-Constraining Nitrogen Cycling in the western Arctic Ocean. (US GEOTRACES Arctic Nitrogen Flux)	Principal Investigator, Contact
EAGER: Collaborative Research: Detection limit in marine nitrogen fixation measurements - Constraints of rates from the mesopelagic ocean (EAGER NitFix)	Principal Investigator
Collaborative Research: Deconstructing Nitrate Stable Isotope Ratios in Aquifers (Nitrate Isotopes in Aquifers)	Principal Investigator, Contact
Investigation of mechanisms leading to seasonal hypoxia in the Southern Benguela Upwelling System (SBUS Hypoxia)	Principal Investigator, Contact
CAREER: The biological nitrogen isotope systematics of ammonium consumption and production (Biological Nitrogen Isotope Fractionation)	Principal Investigator
Collaborative Research: Refining the use of scleractinian cold-water coral skeleton-bound d15N as a proxy for marine N cycling (Coral-bound N)	Principal Investigator
Collaborative Research: Evaluating the contribution of small eukaryotes to nitrate-based new production in the North Pacific Subtropical Gyre (Small Euks)	Lead Principal Investigator, Contact

Deployment coordination

None

Datasets

Project: Collaborative Research: Refining the use of scleractinian cold-water coral skeleton-bound d15N as a proxy for marine N cycling

Dataset	Version Date	Current State
B. elegans cold water coral lab culture: CTD Co-Principal Investigator	2024-02-09	Final no updates expected
B. elegans cold water coral lab culture: starvation trial Co-Principal Investigator	2024-02-09	Final no updates expected
B. elegans cold water coral lab culture: particulate data Co-Principal Investigator	2024-02-09	Final no updates expected
B. elegans cold water coral lab culture: Artemia Co-Principal Investigator	2024-02-09	Preliminary and in progress
B. elegans cold water coral lab culture: diet and nitrogen experiment Co-Principal Investigator	2024-02-09	Data not available
B. elegans cold water coral lab culture: skeleton-tissue Co-Principal Investigator	2024-02-08	Data not available

Project: CAREER: The biological nitrogen isotope systematics of ammonium consumption and production

Dataset	Version Date	Current State
Phytoplankton Nitrogen isotope fractionation Principal Investigator	2024-03-08	Preliminary and in progress
Simulation of the volume-dependent changes in ẟ15N and ẟ18O for IAEA-NO3 and USGS-34 reference materials (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-12-01	Final no updates expected
Simulation of δ15N and δ18O scale contraction, given the observation of the fraction of O atom exchange with water and blanks (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-12-01	Final no updates expected
O exchange with water during denitrification with the denitrifier method (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-12-01	Final no updates expected
Analyses of nitrate reference solutions in 18O-labeled water with the denitrifier method (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-11-29	Final no updates expected
Volume effects on blanks originating from the bacterial concentrates, equilibration with atmospheric N2O, and NO3- contamination of the water into which the standards were diluted from 2017-2020 (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-11-16	Final no updates expected
Effects of sample volume on N2O recovery and isotopic analysis (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-11-16	Final no updates expected
ẟ15N (ẟ18O) scale contraction was calculated as the percent deviation of the difference between measured ẟ15N (ẟ18O) values of IAEA-NO3 and USGS-34 from the true difference (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-11-16	Final no updates expected
Volume-dependent offsets in NO3- N and O isotope ratios of reference materials (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-11-16	Final no updates expected
Nitrogen isotope fractionation for ammonium assimilation by marine phytoplankton (Biological Nitrogen Isotope Fractionation project) Principal Investigator	2021-11-15	Data not available

Project: Investigation of mechanisms leading to seasonal hypoxia in the Southern Benguela Upwelling System

Dataset	Version Date	Current State
Nutrient and nitrate isotope data from the southern Benguela upwelling system from February to August 2017 Principal Investigator	2020-05-19	Final no updates expected

Project: EAGER: Collaborative Research: Detection limit in marine nitrogen fixation measurements - Constraints of rates from the mesopelagic ocean

Dataset	Version Date	Current State
Trial B test of the dissolution method for estimates of the 15N2 atom% of incubations Principal Investigator	2019-10-02	Final no updates expected
Trial A test of the dissolution method for estimates of the 15N2 atom% of incubations Principal Investigator	2019-10-02	Final no updates expected
Test of potential mass to charge 30 interferences from O2 Principal Investigator	2019-10-02	Final no updates expected
Comparison of Membrane Inlet Mass Spectrometry (MIMS) to Isotope Ratio Mass Spectrometer (IRMS) Principal Investigator	2019-10-02	Final no updates expected
Test of integrity of dissolved 15N2 gas samples stored in Exetainer vials Principal Investigator	2019-10-02	Final no updates expected
Analysis of dissolved 15N2 gas standards by Membrane Inlet Mass Spectrometry Principal Investigator	2019-10-02	Final no updates expected
Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium Principal Investigator	2019-10-02	Final no updates expected
Extracted chlorophyll data, particulate carbon and nitrogen, flow cytometry and 15N2/13C rate measurements collected during EN596 from April 2017 in the North Atlantic Co-Principal Investigator	2019-08-05	Data not available

Project: Collaborative Research: GEOTRACES Arctic Ocean section-Constraining Nitrogen Cycling in the western Arctic Ocean.

Dataset	Version Date	Current State
Nitrate (NO3) and oxygen & deuterium isotopic composition from ice pond samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-24	Final no updates expected
Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-23	Final no updates expected
Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from snow collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-22	Final no updates expected
Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice hole water sampling on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-22	Final no updates expected
Aerosol Nitrate (NO3) from samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-17	Final no updates expected
Nitrate N and O isotope ratios from CTD niskin depth profiles collected along section HLY1502-GN01 in the Western Arctic Ocean from August to October 2015 Principal Investigator	2020-07-09	Final no updates expected

Project: U.S. Arctic GEOTRACES Study (GN01)

Dataset	Version Date	Current State
Nitrate (NO3) and oxygen & deuterium isotopic composition from ice pond samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-24	Final no updates expected
Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-23	Final no updates expected
Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from snow collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-22	Final no updates expected
Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice hole water sampling on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-22	Final no updates expected
Aerosol Nitrate (NO3) from samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 Co-Principal Investigator	2019-01-17	Final no updates expected
Nitrate N and O isotope ratios from CTD niskin depth profiles collected along section HLY1502-GN01 in the Western Arctic Ocean from August to October 2015 Principal Investigator	2020-07-09	Final no updates expected

Project: The Ocean Nitrogen Imbalance Paradox: Environmental Controls on the Denitrification Isotope Effect

Dataset	Version Date	Current State
N and O isotope effects of nitrate reduction by 3 forms of nitrate reductase (15N2 Contamination project) Principal Investigator	2015-08-12	Final no updates expected
Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: The measured quantity of 15N2 added to nitrate and ammonium solutions equilibrated with 15N2 gas Principal Investigator	2015-02-04	Final no updates expected
Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Particulate Nitrogen - The delta 15N of Dunaliella tertiolecta organic matter after growth in media equilibrated with 15N2 gas Principal Investigator	2015-02-03	Final no updates expected
Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: 46-N2O contamination measured directly in commercial 15N2 gas (15N2 Contamination project) Principal Investigator	2014-12-16	Final no updates expected
Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Detected 15N-labeled ammonium (NH4) in commercial 15N2 gas (15N2 Contamination project) Principal Investigator	2014-12-16	Final no updates expected
Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Detected 15N-labeled nitrate (NO3) in commercial 15N2 gas (15N2 Contamination project) Principal Investigator	2014-12-09	Final no updates expected

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Julie Granger

Activities reported for Julie Granger: