Karen L. Casciotti

Affiliation:

Stanford University

Address:

Department of Environmental Earth System Science
473 Via Ortega, Y2E2 Building, Room 140
Stanford, CA
USA 94305

ORCiD:

0000-0002-5286-7795

Activities reported for Karen L. Casciotti:

Program coordination

None

Project coordination

Biogeochemistry of nitrous oxide cycling in the eastern tropical South Pacific (N2O Cycling)	Principal Investigator
Expression of Microbial Nitrification in the Stable Isotopic Systematics of Oceanic Nitrite and Nitrate (Microbial Nitrification)	Principal Investigator, Contact
GEOTRACES Peru-Tahiti Nitrogen Isotope Measurements (EPZT Nitrogen Isotopes)	Principal Investigator, Contact
US GEOTRACES Pacific Meridional Transect (GP15) (U.S. GEOTRACES PMT)	Principal Investigator
Collaborative Research: Mechanisms and Controls of Nitrous Oxide Production in the Eastern Tropical North Pacific Ocean (N2O in ETNP)	Principal Investigator
Solving Microbial Mysteries with Autonomous Technology (Microbial Mysteries)	Co-Principal Investigator
Collaborative Research: US GEOTRACES PMT: Investigating geochemical tracers of the Pacific nitrogen cycle and budget (PMT Nitrate)	Principal Investigator
Collaborative Research: GEOTRACES Atlantic Section Nitrate Isotope Measurements (GP12) (GT Atlantic Nitrate)	Principal Investigator
Collaborative Research: Quantifying nitrous oxide sources across an oxygen gradient in the northern Benguela upwelling system (RGNO Course and Cruise 2022)	Principal Investigator
Collaborative Research: Opening the black box of oxygen deficient zone biogeochemistry through integrative tracers (O2 Deficient Zone Tracers)	Principal Investigator

Deployment coordination

Deployment	Synonyms	Platform	Role
FK180624		Falkor	Co-Chief Scientist
RR1814	GP15, GP15 Leg1, 33RR20180918, PMT, US GEOTRACES PMT	Roger Revelle	Co-Chief Scientist
RR1815	GP15, GP15 Leg 2, 33RR20180918, PMT, US GEOTRACES PMT	Roger Revelle	Co-Chief Scientist

Datasets

Project: Collaborative Research: US GEOTRACES PMT: Investigating geochemical tracers of the Pacific nitrogen cycle and budget

Dataset	Version Date	Current State
Nitrate d15N and d18O from Niskin bottle samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 Co-Principal Investigator	2024-05-21	Final no updates expected
Nitrate d15N and d18O from Niskin bottle samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Co-Principal Investigator	2024-05-28	Final no updates expected

Project: Solving Microbial Mysteries with Autonomous Technology

Dataset	Version Date	Current State
Bottle data and chemical analysis from Falkor cruise FK180624 in the Eastern Tropical North Pacific Ocean in 2018 Principal Investigator	2020-12-02	Final no updates expected

Project: Collaborative Research: Mechanisms and Controls of Nitrous Oxide Production in the Eastern Tropical North Pacific Ocean

Dataset	Version Date	Current State
Bottle data from CTD casts conducted on R/V Sally Ride cruise SR1805 in the Eastern Tropical North Pacific Ocean from March to April 2018 Co-Principal Investigator	2021-06-18	Final no updates expected
Natural abundance N2O isotopomers measured from seawater samples collected in the Eastern Tropical North Pacific during R/V Sally Ride (SR1805) cruise from March to April 2018 Principal Investigator	2020-08-02	Final no updates expected

Project: US GEOTRACES Pacific Meridional Transect (GP15)

Dataset	Version Date	Current State
Nitrate d15N and d18O from Niskin bottle samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 Co-Principal Investigator	2024-05-21	Final no updates expected
Nitrate d15N and d18O from Niskin bottle samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Co-Principal Investigator	2024-05-28	Final no updates expected
Pigment concentrations determined by HPLC from samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 Co-Principal Investigator	2023-11-13	Final no updates expected
Pigment concentrations determined by HPLC from samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Co-Principal Investigator	2023-11-09	Final no updates expected
Bottle file from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 Principal Investigator, Contact	2021-05-05	Final with updates expected
Original scanned sample logs (jpg format) from GeoFish tows on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Co-Principal Investigator, Contact	2020-08-07	Final no updates expected
Original scanned sample logs (jpg and pdf formats) from the GTC rosette casts on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Co-Principal Investigator, Contact	2020-08-05	Final no updates expected
Original scanned cast sheets (jpg and pdf formats) of the GTC rosette casts on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Co-Principal Investigator, Contact	2020-08-05	Final no updates expected
Original scanned console logs (jpg format) of ODF rosette casts on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Principal Investigator, Contact	2020-08-05	Final no updates expected
Original scanned cast sheets (jpg format) of ODF rosette casts on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Principal Investigator, Contact	2020-08-05	Final no updates expected
CTD data from the GTC rosette on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Co-Principal Investigator, Contact	2020-07-22	Final no updates expected
CTD profiles from the ODF rosette on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Principal Investigator, Contact	2020-07-22	Final no updates expected
Bottle file from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Principal Investigator, Contact	2021-05-05	Final with updates expected
Scientific sampling event log from the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from September to November 2018 Co-Chief Scientist, Contact	2021-03-25	Final no updates expected

Project: Measurement of Helium Isotopes, Tritium, Noble Gases, and Radiocarbon

Dataset	Version Date	Current State
Results from Optimum Multiparameter Water Mass Analysis (OMPA) obtained using temperature, salinity, nutrient, and oxygen data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific from October to December 2013 Principal Investigator	2017-08-17	Final no updates expected

Project: GEOTRACES Peru-Tahiti Nitrogen Isotope Measurements

Dataset	Version Date	Current State
Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 Principal Investigator	2024-07-30	Final no updates expected
Nitrous oxide (N2O) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 Principal Investigator	2024-07-24	Final no updates expected
Results from Optimum Multiparameter Water Mass Analysis (OMPA) obtained using temperature, salinity, nutrient, and oxygen data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific from October to December 2013 Principal Investigator	2017-08-17	Final no updates expected
Nitrate (NO3) aerosol isotopes from the U.S. GEOTRACES EPZT cruise TN303 on R/V Thomas G. Thompson in the Eastern Tropical Pacific from October to December 2013 Co-Principal Investigator	2017-07-25	Final no updates expected
Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) Principal Investigator	2016-06-24	Final no updates expected

Project: Expression of Microbial Nitrification in the Stable Isotopic Systematics of Oceanic Nitrite and Nitrate

Dataset	Version Date	Current State
Nitrate (NO3-) and Nitrite (NO2-) d15N and d18O from R/V Atlantis cruise AT15-61 in Jan-Feb 2010 and R/V Melville cruise MV1104 in Mar-Apr 2011 in the Eastern Tropical South Pacific (ETSP) Principal Investigator	2023-07-10	Final no updates expected
Processed CTD data from cruises R/V Atlantis (AT15-61) in Jan-Feb 2010 and R/V Melville (MV1104) in Mar-Apr 2011 in the Eastern Tropical South Pacific Principal Investigator	2020-10-28	Final no updates expected
Ammonia oxidation, nitrite oxidation, and nitrate reduction rates from R/V Atlantis (AT15-61) cruise in Jan-Feb 2010 and R/V Melville (MV1104) cruise in Mar-Apr 2011 in the Eastern Tropical South Pacific Principal Investigator	2020-10-14	Final no updates expected
Water column amoA and Nitrospina-like 16S rRNA gene abundances from qPCR in the Eastern Tropical South Pacific using seawater collected on R/V Atlantis (AT15-61) cruise in Jan-Feb 2010 and R/V Melville (MV1104) cruise in Mar-Apr 2011. Principal Investigator	2020-10-14	Final no updates expected
Nitrous oxide (N2O) concentrations and associated physicochemical parameters from R/V Atlantis cruise AT15-61 in Jan-Feb 2010 and R/V Melville cruise MV1104 in Mar-Apr 2011 in the Eastern Tropical South Pacific (ETSP) Principal Investigator	2023-07-28	Final no updates expected
Dissolved nitrite and ammonium concentration data from R/V Atlantis (AT15-61) cruise in Jan-Feb 2010 and R/V Melville (MV1104) cruise in Mar-Apr 2011 in the Eastern Tropical South Pacific Lead Principal Investigator	2020-08-06	Final no updates expected
Measurements of dissolved organic nitrogen concentration and d15N from R/V Atlantis and R/V Melville cruises in the Eastern Tropical South Pacific from 2010 to 2011. Co-Principal Investigator	2018-03-06	Final no updates expected
Nitrate + nitrite concentration and d15N from the Eastern Tropical South Pacific collected on the R/V Atlantis (AT15-61) and R/V Melville (MV1104) in 2010-2011 (N2 fixation ETSP project, Microbial Nitrification project) Principal Investigator	2015-04-09	Final no updates expected

Project: Collaborative Research: Documenting N2 fixation in N deficient waters of the Eastern Tropical South Pacific

Dataset	Version Date	Current State
Measurements of dissolved organic nitrogen concentration and d15N from R/V Atlantis and R/V Melville cruises in the Eastern Tropical South Pacific from 2010 to 2011. Co-Principal Investigator	2018-03-06	Final no updates expected
Nitrate + nitrite concentration and d15N from the Eastern Tropical South Pacific collected on the R/V Atlantis (AT15-61) and R/V Melville (MV1104) in 2010-2011 (N2 fixation ETSP project, Microbial Nitrification project) Principal Investigator	2015-04-09	Final no updates expected

Project: U.S. GEOTRACES East Pacific Zonal Transect (GP16)

Dataset	Version Date	Current State
Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 Principal Investigator	2024-07-30	Final no updates expected
Nitrous oxide (N2O) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 Principal Investigator	2024-07-24	Final no updates expected
Results from Optimum Multiparameter Water Mass Analysis (OMPA) obtained using temperature, salinity, nutrient, and oxygen data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific from October to December 2013 Principal Investigator	2017-08-17	Final no updates expected
Nitrate (NO3) aerosol isotopes from the U.S. GEOTRACES EPZT cruise TN303 on R/V Thomas G. Thompson in the Eastern Tropical Pacific from October to December 2013 Co-Principal Investigator	2017-07-25	Final no updates expected
Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) Principal Investigator	2016-06-24	Final no updates expected

Project: Biogeochemistry of nitrous oxide cycling in the eastern tropical South Pacific

Dataset	Version Date	Current State
Nitrate, nitrite, and nitrous oxide isotope measurements from the Eastern Tropical South Pacific ocean collected on RVIB Nathaniel B. Palmer cruise NBP1305 from June to July 2013 Principal Investigator	2018-08-28	Final no updates expected
Nitrate (d15N and d18O) and nitrite (d15N) isotopic data, and corresponding hydrographic data from R/V Knorr cruise KN182-09 in the Peruvian Oxygen Deficient Zone in 2005 (N2O Cycling project) Principal Investigator	2013-06-05	Final no updates expected

Project: Cobalt, Iron and Micro-organisms from the Upwelling zone to the Gyre (GAc01)

Dataset	Version Date	Current State
Nitrate dual isotope (d15N and d18O) measurements from R/V Knorr cruise KN192-05 in the South Atlantic subtropical gyre and Benguela upwelling region in 2007 (CoFeMUG project) Principal Investigator	2015-12-28	Final no updates expected
Dissolved N2O concentration and stable isotope/isotopomer composition measurements from R/V Knorr cruise KN192-05 in the South Atlantic subtropical gyre and Benguela upwelling region in 2007 (CoFeMUG project) Principal Investigator, Contact	2014-09-17	Final no updates expected

Project: U.S. GEOTRACES North Atlantic Transect (GA03)

Dataset	Version Date	Current State
Nitrogen and Oxygen isotope ratios of dissolved nitrate from R/V Knorr KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) Co-Principal Investigator	2018-12-26	Final no updates expected
delta 15N of nitrate from R/V Knorr cruise KN199-04 & KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) Principal Investigator	2013-04-29	Final no updates expected

Project: VERtical Transport In the Global Ocean

Dataset	Version Date	Current State
d15N and d13C isotopic analysis of MULVFS sample suspended particles from R/V Kilo Moana cruise KM0414 from the Hawaiian Islands, HOT Site in 2004 (VERTIGO project) Principal Investigator	2008-02-12	Final no updates expected
d15N isotopic analysis of sinking particles from R/V Kilo Moana cruise KM0414 from the Hawaiian Islands, HOT Site in 2004 (VERTIGO project) Principal Investigator	2008-02-12	Final no updates expected
d15N and d18O isotopic analysis of nitrate samples from R/V Kilo Moana cruise KM0414 from the Hawaiian Islands, HOT Site in 2004 (VERTIGO project) Principal Investigator	2008-02-12	Final no updates expected

Status message

Database

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Karen L. Casciotti

Activities reported for Karen L. Casciotti: