Water stable isotopes and associated salinity measurements in the Canadian Arctic Archipelago from 17 July – 04 August 2019

The relationship between δ¹⁸O and salinity has been widely studied because it can provide crucial information on the partitioning of isotopes through the hydrological cycle. Current understanding of δ¹⁸O-S characteristics has been used to constrain water cycle models, isotope-enabled atmospheric and...

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Bibliographic Details
Main Authors: Garcia-Eidell, Cynthia, Berkelhammer, Max, Bellagamba, Anthony, D'Angelo, Alessandra, Umar, Samira, Crable, Frances, Ewa, Theressa, Raziuddin, Humair, Gonzalez-Meler, Miquel, King, Andrew L, VanKeersbilck, Nik, Loose, Brice, Gong, Donglai, Otokiak, Mia, Porter, Gibson, Shaban, Mirella, Schulze, Ericka, Rivera, Tristan, Estes, Korenna, Kim, Melvin, Millstone, Triston, Montenegro, Kevin, Nodal, Andrea, Santana, Rose, Boleaga, Yoana, Digilio, Michael, Kopka, Krystian
Format: Dataset
Language:English
Published: PANGAEA 2021
Subjects:
CTD profile
ice core isotopes
Northwest Passage Project
NPP
precipitation isotopes
Salinity
surface salinity
water stable isotopes
Arctic
Canadian Arctic Archipelago
Northwest Passage
Arctic Archipelago
ice core
Northwest passage
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.937543
https://doi.org/10.1594/PANGAEA.937543
Description
Summary:The relationship between δ¹⁸O and salinity has been widely studied because it can provide crucial information on the partitioning of isotopes through the hydrological cycle. Current understanding of δ¹⁸O-S characteristics has been used to constrain water cycle models, isotope-enabled atmospheric and ocean models as well as to monitor evaporation (E) and precipitation (P) changes in major ocean basins. However, in the polar regions, where large spatial and temporal variabilities in δ¹⁸O and salinity are expected due to the highly seasonal sea ice melting/formation, river runoff, E-P intensification and rapidly changing summer ice minimum, uncertainties still surround the δ¹⁸O-Salinity relationship. To observe the inputs of freshwater in a poorly-understood, but vastly changing region in the Arctic, we collected matching δ¹⁸O-Salinity data from discrete samples from the surface (bucket sampling) and from profiles (Conductivity, Temperature, Depth (CTD) casts) in the Canadian Arctic Archipelago (CAA) during the Northwest Passage expedition aboard the RV Oden last 17 July – 04 August 2019. Matching δ¹⁸O-Salinity measurements were also obtained from ice core samples as well as from a precipitation event during the cruise. Here, we present more than 200 new and paired δ¹⁸O-Salinity measurements to help represent water mass end-members for freshwater budgeting as well as understanding the changes in the CAA's hydrologic cycle.

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