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Nansen Amundsen Basin Observational System

Laura Whitmore ● Research Assistant Professor

International Arctic Research Center on the UAF Troth Yeddha’ Campus

With contributions from Igor Polyakov and the NABOS Team

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NABOS

is a repeat observing system in the Arctic Ocean that aims to understand:

  • Transport of Atlantic water in boundary currents
  • Pathways between fresh water sources, shelf waters, deep basins, and the surface ocean
  • Changes in upper ocean circulation in the Arctic Ocean

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Laura Whitmore● International Arctic Research Center

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The Arctic Ocean

Laura Whitmore ● International Arctic Research Center

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Anderson and MacDonald (2015)

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A Pacific Perspective

Laura Whitmore ● International Arctic Research Center

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NABOS History: �2002 – 2013�2013 – 2021�2021 – 2026+

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Laura Whitmore ● International Arctic Research Center

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NABOS History: �2002 – 2013�2013 – 2021�2021 – 2026+

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Laura Whitmore ● International Arctic Research Center

Overarching goal of NABOS, as an element of the Arctic Observing Network, is to compile a cohesive picture of climatic changes in the eastern Arctic Ocean.

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NABOS History: �2002 – 2013�2013 – 2021�2021 – 2026+

First Last Name ● International Arctic Research Center

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2002 – 2013 (NABOS I)

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2013-2021 (NABOS II)

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Shoaling

Less stable

Igor Polyakov

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2002 – 2013 (NABOS I)

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2013-2021 (NABOS II)

New Eurasian Arctic Ocean

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  • Temperature anomaly increased (warmer Atlantic waters)
  • Intermediate Atlantic Waters shoaled, stratification weakened

Shoaling

Less stable

Igor Polyakov

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2021 – 2026 (NABOS III)

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Develop a “comprehensive and quantitative understanding of how the eastern EB functions as a switchgear, accumulating and releasing major Arctic riverine transports and redistributing ice and fresh water between the eastern and western Arctic in response to atmospheric and oceanic forcings.”

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Igor Polyakov

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Biogeochemical Component

  • Minimal nutrient data pre -2015.
  • 2015+
    • Nutrients
    • Barium
    • Carbonate System
    • Oxygen Isotopes
    • CDOM
    • Radium
    • Chlorophyll

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Laura Whitmore ● International Arctic Research Center

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  • Indicators of water origin
  • Indications of regional change
  • Supply to surface waters

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Water Origin

Laura Whitmore ● International Arctic Research Center

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Water Origin & Regional Change

Laura Whitmore ● International Arctic Research Center

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Nutrient Supply

Laura Whitmore ● International Arctic Research Center

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Connecting Nutrients to Ecosystems

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Juranek, 2022 Oceanography

Circulation 🡪 Transport 🡪 Ecosystems

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Distributed �Biological�Observatory

Laura Whitmore ● International Arctic Research Center

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KOPRI & NABOS propose a DBO in the ESS

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Contact details

LMWHITMORE@ALASKA.EDU

WEBSITE

iarc.uaf.edu

whitmorescience.com

SOCIAL MEDIA

Twitter ► @IARC_Alaska

Twitter ► @geochemisthat

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