Radiative Heating of an Ice‐Free Arctic Ocean

  title={Radiative Heating of an Ice‐Free Arctic Ocean},
  author={Kristina Pistone and Ian Eisenman and Veerabhadran Ramanathan},
  journal={Geophysical Research Letters},
  pages={7474 - 7480}
During recent decades, there has been dramatic Arctic sea ice retreat. This has reduced the top‐of‐atmosphere albedo, adding more solar energy to the climate system. There is substantial uncertainty regarding how much ice retreat and associated solar heating will occur in the future. This is relevant to future climate projections, including the timescale for reaching global warming stabilization targets. Here we use satellite observations to estimate the amount of solar energy that would be… 

An Estimate of the Surface Pollution of the Arctic Sea Ice

The Arctic sea ice represents an important energy reservoir for the climate of the northern hemisphere. The shrinking of the polar ice in the past decades decreases the stored energy and raises

Nordic Seas Heat Loss, Atlantic Inflow, and Arctic Sea Ice Cover Over the Last Century

Poleward ocean heat transport is a key process in the earth system. We detail and review the northward Atlantic Water (AW) flow, Arctic Ocean heat transport, and heat loss to the atmosphere since

Recent strengthening of snow and ice albedo feedback driven by Antarctic sea-ice loss

The decline of the Arctic cryosphere during recent decades has lowered the region’s surface albedo, reducing its ability to reflect solar radiation back to space. It is not clear what role the

Less climatic resilience in the Arctic

Fram Strait: Possible key to saving Arctic ice

We present a modeling study of the sensitivity of present-day Arctic climate dynamics to increases in sea ice albedo in the Fram Strait. Our analysis reveals a new mechanism whereby enhancing the

Regional Geoengineering Using Tiny Glass Bubbles Would Accelerate the Loss of Arctic Sea Ice

Arctic sea ice might be preserved if its albedo could be increased. To this end, it has been proposed to spread hollow glass microspheres (HGMs) over the ice. We assess the radiative forcing that

Unraveling driving forces explaining significant reduction in satellite-inferred Arctic surface albedo since the 1980s

It is shown that the decrease in snow cover fraction is primarily driven by the increase in surface air temperature, followed by declining snowfall, soot heating has not been the driver of changes in the Arctic snow cover, ice cover, and surface albedo since the 1980s.

Sustaining the Arctic in Order to Sustain the Global Climate System

The unraveling of the Arctic is bad enough for the Arctic itself, but it will have enormous consequences for the entire planet since the Arctic is a crucial component of the global climate system.

Annual Mean Arctic Amplification 1970–2020: Observed and Simulated by CMIP6 Climate Models

While the annual mean Arctic Amplification (AA) index varied between two and three during the 1970–2000 period, it reached values exceeding four during the first two decades of the 21st century. The



Observational determination of albedo decrease caused by vanishing Arctic sea ice

This analysis directly quantifies how much the Arctic as viewed from space has darkened in response to the recent sea ice retreat, finding that this decline has caused 6.4 ± 0.9 W/m2 of radiative heating since 1979, considerably larger than expectations from models and recent less direct estimates.

The Global Radiative Impact of the Sea-Ice-Albedo Feedback in the Arctic

[1] A simple method for estimating the global radiative forcing caused by the sea ice–albedo feedback in the Arctic is presented. It is based on observations of cloud cover, sea ice concentration,

Observed Arctic sea-ice loss directly follows anthropogenic CO2 emission

A robust linear relationship between monthly-mean September sea-ice area and cumulative carbon dioxide (CO2) emissions allowed Notz and Stroeve to infer the future evolution of Arctic summer sea ice directly from the observational record.

Sea Ice Trends in Climate Models Only Accurate in Runs with Biased Global Warming

AbstractObservations indicate that the Arctic sea ice cover is rapidly retreating while the Antarctic sea ice cover is steadily expanding. State-of-the-art climate models, by contrast, typically

Recent and future changes in Arctic sea ice simulated by the HadCM3 AOGCM

The HadCM3 AOGCM has been used to undertake an ensemble of four integrations from 1860 to 1999 with forcings due to all major anthropogenic and natural climate factors. The simulated decreasing trend

Assessment of Sea Ice Albedo Radiative Forcing and Feedback over the Northern Hemisphere from 1982 to 2009 Using Satellite and Reanalysis Data

AbstractThe decreasing surface albedo caused by continuously retreating sea ice over Arctic plays a critical role in Arctic warming amplification. However, the quantification of the change in

Geographic muting of changes in the Arctic sea ice cover

The seasonal cycle in Arctic sea ice extent is asymmetric. Its amplitude has grown in recent decades as the ice has retreated more rapidly in summer than in winter. These seasonal disparities have

Do Climate Models Underestimate the Sensitivity of Northern Hemisphere Sea Ice Cover

AbstractThe sensitivity of Northern Hemisphere sea ice cover to global temperature change is examined in a group of climate models and in the satellite-era observations. The models are found to have

Inter‐annual to multi‐decadal Arctic sea ice extent trends in a warming world

A climate model (CCSM4) is used to investigate the influence of anthropogenic forcing on late 20th century and early 21st century Arctic sea ice extent trends. On all timescales examined (2–50+

Reduced probability of ice-free summers for 1.5 °C compared to 2 °C warming

  • A. Jahn
  • Environmental Science
    Nature Climate Change
  • 2018
Arctic sea ice has declined rapidly with increasing global temperatures. However, it is largely unknown how Arctic summer sea-ice impacts would vary under the 1.5 °C Paris target compared to