Increased ocean heat transport into the Arctic Mediterranean over the period 1993-2016
Recommended citation:
Takamasa Tsubouchi, Kjetil Våge, Bogi Hansen, Karin Margretha H. Larsen, Svein Østerhus, Clare Johnson, Steingrímur Jónsson, Héðinn Valdimarsson(2020)Increased ocean heat transport into the Arctic Mediterranean over the period 1993-2016
This study provides, for the first time, mass-balanced ocean heat transport time series across the rim of Arctic Mediterranean (Greenland-Scotland Ridge, Davis Strait, and Bering Strait) between January 1993 and April 2017. We synthesize all available moored records of velocity and temperature for the major ocean currents crossing the boundary. A box inverse model is used to generate mass-balanced ocean circulation on monthly time steps. The derived monthly ocean heat transport is highly variable ranging from ~200 TW to ~450TW. The long-term mean ocean heat transport is 316 ± 47 TW (mean ± standard deviation). Around 2000 an increase from ~300 TW to ~320 TW occurred. This shift is a result of increases in volume transport and temperature of the Atlantic inflow across the Greenland-Scotland Ridge. The extra ~20 TW is twice the amount of heat required to explain the recent sea ice reduction and ocean heat content increase in the northern seas.
Increased ocean heat transport into the Arctic Mediterranean over the period 1993-2016
Data Set Citation List
Dataset Creator
Dataset Title
Dataset Release Date
Dataset Publisher
Version
Online Resource
Takamasa Tsubouchi, Kjetil Våge, Bogi Hansen, Karin Margretha H. Larsen, Svein Østerhus, Clare Johnson, Steingrímur Jónsson, Héðinn Valdimarsson
Increased ocean heat transport into the Arctic Mediterranean over the period 1993-2016
2020-02-04T00:00:00:00Z
University of Bergen
1.0
ftp://ftp.nmdc.no
Personnel List
Role
First Name
Last Name
Technical Contact
Arnfinn
Morvik
Investigator
Takamasa
Tsubouchi
Parameters List
Category
Topic
Term
Variable Level 1
EARTH SCIENCE
OCEANS
OCEAN CIRCULATION
OCEAN CURRENTS
EARTH SCIENCE
OCEANS
OCEAN HEAT BUDGET
ADVECTION
ISO Topic Category List
Oceans
Keywords List
Ocean volume transport,Ocean heat transport
Temporal Coverage
Start Date
Stop Date
1993-01-15
2017-04-15
Data Set Progress
Complete
Spatial Coverage
Location List
Location Category
Location Type
Location Subregion1
Ocean
Arctic Ocean
Ocean
Atlantic Ocean
North Atlantic Ocean
Project List
Short Name
Long Name
nmdc
NMDC
Access Constraints
unrestricted
Originating Center
Geophysical Institute, University of Bergen
Data Center List
Data Center Name
Personnel
Institute of Marine Research, Norwegian Marine Data Center Institute of Marine Research, Norwegian Marine Data Center
Datacenter Arnfinn Morvik
Geophysical Institute, University of Bergen Geophysical Institute, University of Bergen
Originating institution Takamasa Tsubouchi
Distribution List
Distribution Media
Distribution Format
FTP
txt
Reference List
Summary
This study provides, for the first time, mass-balanced ocean heat transport time series across the rim of Arctic Mediterranean (Greenland-Scotland Ridge, Davis Strait, and Bering Strait) between January 1993 and April 2017. We synthesize all available moored records of velocity and temperature for the major ocean currents crossing the boundary. A box inverse model is used to generate mass-balanced ocean circulation on monthly time steps. The derived monthly ocean heat transport is highly variable ranging from ~200 TW to ~450TW. The long-term mean ocean heat transport is 316 ± 47 TW (mean ± standard deviation). Around 2000 an increase from ~300 TW to ~320 TW occurred. This shift is a result of increases in volume transport and temperature of the Atlantic inflow across the Greenland-Scotland Ridge. The extra ~20 TW is twice the amount of heat required to explain the recent sea ice reduction and ocean heat content increase in the northern seas.
Takamasa Tsubouchi, Kjetil Våge, Bogi Hansen, Karin Margretha H. Larsen, Svein Østerhus, Clare Johnson, Steingrímur Jónsson, Héðinn Valdimarsson (2020) Increased ocean heat transport into the Arctic Mediterranean over the period 1993-2016