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Title: Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate

Abstract

The Arctic Ocean is expected to transition into a seasonally ice-free state by mid-century, enhancing Arctic warming and leading to substantial ecological and socio-economic challenges across the Arctic region. It has been proposed that artificially increasing high latitude ocean albedo could restore sea ice, but the climate impacts of such a strategy have not been previously explored. Motivated by this, we investigate the impacts of idealized high latitude ocean albedo changes on Arctic sea ice restoration and climate. In our simulated 4xCO₂ climate, imposing surface albedo alterations over the Arctic Ocean leads to partial sea ice recovery and a modest reduction in Arctic warming. With the most extreme ocean albedo changes, imposed over the area 70°–90°N, September sea ice cover stabilizes at ~40% of its preindustrial value (compared to ~3% without imposed albedo modifications). This is accompanied by an annual mean Arctic surface temperature decrease of ~2 °C but no substantial global mean temperature decrease. Imposed albedo changes and sea ice recovery alter climate outside the Arctic region too, affecting precipitation distribution over parts of the continental United States and Northeastern Pacific. For example, following sea ice recovery, wetter and milder winter conditions are present in the Southwest United Statesmore » while the East Coast experiences cooling. We conclude that although ocean albedo alteration could lead to some sea ice recovery, it does not appear to be an effective way of offsetting the overall effects of CO₂ induced global warming.« less

Authors:
 [1];  [2];  [3]
  1. Carnegie Institution for Science, Stanford, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Carnegie Institution for Science, Stanford, CA (United States)
  3. California Institute of Technology, Pasadena, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1200907
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Environmental Research Letters
Additional Journal Information:
Journal Volume: 10; Journal Issue: 4; Journal ID: ISSN 1748-9326
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Cvijanovic, Ivana, Caldeira, Ken, and MacMartin, Douglas G. Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate. United States: N. p., 2015. Web. doi:10.1088/1748-9326/10/4/044020.
Cvijanovic, Ivana, Caldeira, Ken, & MacMartin, Douglas G. Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate. United States. https://doi.org/10.1088/1748-9326/10/4/044020
Cvijanovic, Ivana, Caldeira, Ken, and MacMartin, Douglas G. 2015. "Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate". United States. https://doi.org/10.1088/1748-9326/10/4/044020. https://www.osti.gov/servlets/purl/1200907.
@article{osti_1200907,
title = {Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate},
author = {Cvijanovic, Ivana and Caldeira, Ken and MacMartin, Douglas G.},
abstractNote = {The Arctic Ocean is expected to transition into a seasonally ice-free state by mid-century, enhancing Arctic warming and leading to substantial ecological and socio-economic challenges across the Arctic region. It has been proposed that artificially increasing high latitude ocean albedo could restore sea ice, but the climate impacts of such a strategy have not been previously explored. Motivated by this, we investigate the impacts of idealized high latitude ocean albedo changes on Arctic sea ice restoration and climate. In our simulated 4xCO₂ climate, imposing surface albedo alterations over the Arctic Ocean leads to partial sea ice recovery and a modest reduction in Arctic warming. With the most extreme ocean albedo changes, imposed over the area 70°–90°N, September sea ice cover stabilizes at ~40% of its preindustrial value (compared to ~3% without imposed albedo modifications). This is accompanied by an annual mean Arctic surface temperature decrease of ~2 °C but no substantial global mean temperature decrease. Imposed albedo changes and sea ice recovery alter climate outside the Arctic region too, affecting precipitation distribution over parts of the continental United States and Northeastern Pacific. For example, following sea ice recovery, wetter and milder winter conditions are present in the Southwest United States while the East Coast experiences cooling. We conclude that although ocean albedo alteration could lead to some sea ice recovery, it does not appear to be an effective way of offsetting the overall effects of CO₂ induced global warming.},
doi = {10.1088/1748-9326/10/4/044020},
url = {https://www.osti.gov/biblio/1200907}, journal = {Environmental Research Letters},
issn = {1748-9326},
number = 4,
volume = 10,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}

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Cited by: 14 works
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Works referenced in this record:

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Works referencing / citing this record:

Increasing Arctic Sea Ice Albedo Using Localized Reversible Geoengineering
journal, June 2018


Sea Ice Targeted Geoengineering Can Delay Arctic Sea Ice Decline but not Global Warming
journal, December 2019


The G4Foam Experiment: global climate impacts of regional ocean albedo modification
journal, January 2017


Future loss of Arctic sea-ice cover could drive a substantial decrease in California’s rainfall
journal, December 2017