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Overturning in the Subpolar North Atlantic Program (OSNAP)

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Now showing 1 - 10 of 14
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    Microcat, Aquadopp, and ADCP data from the 2020-2022 Labrador Sea eastern boundary mooring array as part of the Overturning in the Subpolar North Atlantic Program (OSNAP)
    (Georgia Institute of Technology, 2024-01) Pickart, Robert S.
    The Overturning of the Subpolar North Atlantic Program (OSNAP) is an effort to determine the strength of the meridional overturning circulation and associated heat and freshwater fluxes in the subpolar North Atlantic. It is a collaborative program with scientists from the U.S., U.K., Netherlands, Germany, France, Canada, and China. Together, moorings were deployed across the boundaries of the Labrador Sea, Irminger Sea, Iceland Basin, and eastern subpolar North Atlantic. The OSNAP West array consists of 11 moorings spanning from the west Greenland shelf to the base of the continental slope. The 6 shelf moorings are bottom tripods, while the five offshore moorings are tall moorings. The tripod moorings contained a weak-link extension to obtain hydrographic measurements 50 m below the surface. Velocity was measured using a combination of Aquadopps and acoustic Doppler current profilers (ADCPs), and the pressure, temperature, and salinity were measured using MicroCATs. The time period of the deployment of the array was August 2020 to August 2022. All of the data have been calibrated, processed, and quality controlled.
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    2023 Overturning in the Subpolar North Atlantic Program (OSNAP) Technical Report: Calculation Method Summary
    (Georgia Institute of Technology, 2023-06-20) Fu, Yao ; Li, Feili ; Johns, William E. ; Lozier, M. Susan
    The Overturning in the Subpolar North Atlantic Program (OSNAP) observing system utilizes data from a suite of moorings, gliders, Argo floats, and satellite altimetry to estimate the subpolar Atlantic Meridional Overturning Circulation (MOC). The OSNAP section consists of two parts: OSNAP West extends from southern Labrador to southwestern Greenland and OSNAP East from southeastern Greenland to the coast of Scotland (Fig. 1). Since 2014 OSNAP array have been continuously monitoring the MOC, as well as the meridional heat (MHT) and freshwater (MFT) transports in the subpolar North Atlantic. Currently, the OSNAP record is 71 months (August 2014 to June 2020). Results have been published and the data is freely available at https://www.o-snap.org/data-access/. In this technical report, we synthesize the OSNAP MOC metrics calculation methods that have been documented in a series of OSNAP publications.
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    Microcat, Aquadopp, and ADCP data from the eastern mid-Atlantic ridge mooring array as part of Overturning in the Subpolar North Atlantic Program (OSNAP) from 2018-2020
    (Georgia Institute of Technology, 2023-05) Houk, Adam ; Johns, William
    The University of Miami's OSNAP (Overturning in the subpolar North Atlantic Program) is an NSF funded project that is part of the international OSNAP array put in place to measure the full depth, basin-wide overturning circulation and associated transport of heat and freshwater (www.o-snap.org). The UM Eastern MAR array consists of a series of vertical sub-surface moorings deployed along the eastern slope of the Reykjanes Ridge and across the Iceland Basin near 58°N. This dataset contains data of 2-year deployment (2018-2020) of the Deep Western Boundary Current Array in the Iceland Basin. The data sets are time series of pressure, temperature, salinity and currents and have been fully processed, calibrated and quality controlled.
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    Microcat, Aquadopp, and ADCP data from the 2018-2020 Labrador Sea eastern boundary mooring array as part of the Overturning in the Subpolar North Atlantic Program (OSNAP)
    (Georgia Institute of Technology, 2023-05) Pickart, Robert S.
    The Overturning of the Subpolar North Atlantic Program (OSNAP) is an effort to determine the strength of the meridional overturning circulation and associated heat and freshwater fluxes in the subpolar North Atlantic. It is a collaborative program with scientists from the U.S., U.K., Netherlands, Germany, France, Canada, and China. Together, moorings were deployed across the boundaries of the Labrador Sea, Irminger Sea, Iceland Basin, and eastern subpolar North Atlantic. The OSNAP West array consists of 10 moorings spanning from the west Greenland shelf to the base of the continental slope. The 5 shelf moorings are bottom tripods, while the five offshore moorings are tall moorings. The tripod moorings contained a weak-link extension to obtain hydrographic measurements 50 m below the surface. Velocity was measured using a combination of Aquadopps and acoustic Doppler current profilers (ADCPs), and the pressure, temperature, and salinity were measured using MicroCATs. The time period of the first deployment of the array was September 2018 to July 2020. All of the data have been calibrated, processed, and quality controlled.
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    Temperature, Salinity and Velocity Data Derived from the Overturning in the Subpolar North Atlantic Program (OSNAP) Array between August 2014 and May 2018
    (Georgia Institute of Technology, 2023-03-30) Li, Feili ; Lozier, M. Susan ; Bacon, S. ; Bower, Amy S. ; Cunningham, Stuart A. ; de Jong, M. Femke ; deYoung, Brad ; Fraser, Neil ; Fried, Nora ; Han, Guoqi ; Holliday, N. Penny ; Holte, James ; Houpert, L. ; Inall, Mark E. ; Johns, William E. ; Jones, Sam ; Johnson, C. ; Karstensen, Johannes ; LeBras, I.A. ; Lherminier, P. ; Lin, X. ; Mercier, H. ; Oltmanns, M. ; Pacini, Astrid ; Petit, T. ; Pickart, Robert S. ; Rayner, Darren ; Straneo, Fiammetta ; Thierry, V. ; Visbeck, M. ; Yashayaev, Igor ; Zhou, C.
    OSNAP (Overturning in the Subpolar North Atlantic Program) is an international program designed to provide a continuous record of the full-water column, trans-basin fluxes of heat, mass and freshwater in the subpolar North Atlantic.
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    Meridional Overturning Circulation Observed by the Overturning in the Subpolar North Atlantic Program (OSNAP) Array from August 2014 to June 2020
    (Georgia Institute of Technology, 2023) Fu, Yao ; Lozier, M. Susan ; Biló, Tiago Carrilho ; Bower, Amy S. ; Cunningham, Stuart A. ; Cyr, Frédéric ; de Jong, M. Femke ; deYoung, Brad ; Drysdale, Lewis ; Fraser, Neil ; Fried, Nora ; Furey, Heather H. ; Han, Guoqi ; Handmann, Patricia ; Holliday, N. Penny ; Holte, James ; Inall, Mark E. ; Johns, William E. ; Jones, Sam ; Karstensen, Johannes ; Li, Feili ; Pacini, Astrid ; Pickart, Robert S. ; Rayner, Darren ; Straneo, Fiammetta ; Yashayaev, Igor
    An international effort, Overturning in the Subpolar North Atlantic Program (OSNAP), is a partnership among oceanographers from the US, UK, Germany, the Netherlands, Canada and China whose goal is to measure and understand what drives the Atlantic Meridional Overturning Circulation (MOC) and its variability. OSNAP is consisted of about 60 moorings that stretch from Labrador to Greenland to Scotland, providing a continuous record of the full water column, trans-basin volume transports in the subpolar North Atlantic. The first 6 years of data (August 2014 - June 2020) from the full OSNAP array has been used to produce the monthly estimates of the MOC at OSNAP. All data are freely available from www.o-snap.org.
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    Overturning in the Subpolar North Atlantic Program (OSNAP) Model Truth Code
    (Georgia Institute of Technology, 2022-07) Fortin, Anne-Sophie ; Majumder, Sudip ; Li, Feili ; Fu, Yao
    As part of an international effort, the Overturning in the Subpolar North Atlantic Program (OSNAP), is an ocean observing system that continuously measures trans-basin velocity, temperature and salinity of the full water column in the subpolar North Atlantic since 2014. As there is a broad interest in the community to compare model simulations with observational estimates, we propose a simple Python code that computes the meridional overturning circulation (MOC) from a model dataset interpolated onto the OSNAP section. Please note that this code is the beta version. We appreciate any feedback that could be useful for ulterior versions. In addition, there are ongoing efforts to make this code generalized for any model dataset in future versions.
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    Conductivity-Temperature-Depth (CTD) data as part of the Overturning in the Subpolar North Atlantic Program (OSNAP), from 2020 on the R/V Neil Armstrong
    (Georgia Institute of Technology, 2022) Pickart, Robert S. ; McRaven, Leah
    The Overturning of the Subpolar North Atlantic Program (OSNAP) is an effort to determine the strength of the meridional overturning circulation and associated heat and freshwater fluxes in the subpolar North Atlantic. It is a collaborative program with scientists from the U.S., U.K., Netherlands, Germany, France, Canada, and China. Together, a series of hydrographic surveys and mooring deployments have been completed across the boundaries of the Labrador Sea, Irminger Sea, Iceland Basin, and eastern subpolar North Atlantic.
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    Conductivity-Temperature-Depth (CTD) data as part of the Overturning in the Subpolar North Atlantic Program (OSNAP), from 2018 on the R/V Neil Armstrong
    (Georgia Institute of Technology, 2022) Pickart, Robert S. ; McRaven, Leah
    The Overturning of the Subpolar North Atlantic Program (OSNAP) is an effort to determine the strength of the meridional overturning circulation and associated heat and freshwater fluxes in the subpolar North Atlantic. It is a collaborative program with scientists from the U.S., U.K., Netherlands, Germany, France, Canada, and China. Together, a series of hydrographic surveys and mooring deployments have been completed across the boundaries of the Labrador Sea, Irminger Sea, Iceland Basin, and eastern subpolar North Atlantic.
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    Meridional Overturning Circulation Observed by the Overturning in the Subpolar North Atlantic Program (OSNAP) Array from August 2014 to May 2018 - Corrected Data
    (Georgia Institute of Technology, 2021-12) Li, Feili ; Lozier, M. Susan ; Bacon, S. ; Bower, Amy S. ; Cunningham, Stuart A. ; de Jong, M. Femke ; deYoung, Brad ; Fraser, Neil ; Han, Guoqi ; Fried, Nora ; Han, Guoqi ; Holliday, N. Penny ; Holte, James ; Houpert, L. ; Inall, Mark E. ; Johns, William E. ; Jones, Sam ; Johnson, C. ; Karstensen, Johannes ; LeBras, I.A. ; Lherminier, P. ; Lin, X. ; Mercier, H. ; Oltmanns, M. ; Pacini, Astrid ; Petit, T. ; Rayner, Darren ; Straneo, Fiammetta ; Thierry, V. ; Visbeck, M. ; Yashayaev, Igor ; Zhou, C.
    An international effort, Overturning in the Subpolar North Atlantic Program (OSNAP), is a partnership among oceanographers from the US, UK, Germany, the Netherlands, Canada and China whose goal is to measure and understand what drives the Atlantic Meridional Overturning Circulation (MOC) and its variability. OSNAP is consisted of more than 53 moorings that stretch from Labrador to Greenland to Scotland, providing a continuous record of the full water column, trans-basin volume transports in the subpolar North Atlantic. The first 4 years of data (August 2014 - May 2018) from the full OSNAP array has been used to produce the 30-day mean estiamtes of the MOC at OSNAP. All data are freely available from www.o-snap.org. item_description: Strength of the Meridional Overturning Circulation across the OSNAP array, defined as the maximum of the streamfunction in density space. The original version of this dataset is available at https://doi.org/10.35090/wa93-m688