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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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In Situ Soil Moisture Sensors in Undisturbed Soils
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Exceptional warming over the Barents area.

Ketil Isaksen1, Øyvind Nordli2, Boris Ivanov3,4

  • 1Norwegian Meteorological Institute, 0313, Oslo, Norway. ketil.isaksen@met.no.

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|June 15, 2022
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Summary
This summary is machine-generated.

Arctic warming is accelerating, with new data showing record-high surface air temperature (SAT) increases of up to 2.7°C per decade in the Barents Sea. This rapid warming correlates with declining sea ice cover.

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Area of Science:

  • Arctic climate science
  • Atmospheric science
  • Oceanography

Background:

  • Global reanalyses indicate maximum surface air temperature (SAT) warming in the northern Barents region.
  • Limited observational data in this Arctic hotspot region reduces confidence in reanalysis accuracy.

Purpose of the Study:

  • To investigate recent warming trends over the past 20-40 years in the Barents Sea using new observational data.
  • To enhance the understanding of SAT changes and their relationship with sea ice in a critical Arctic region.

Main Methods:

  • Utilized a quality-controlled, comprehensive SAT dataset from northern Barents Sea archipelagos.
  • Compared new observational data with global and regional reanalysis datasets.
  • Incorporated remote sensing data, including sea ice concentration (SIC), sea surface temperature (SST), and ice charts.

Main Results:

  • Identified statistically significant, record-high annual warming rates of up to 2.7°C per decade.
  • Observed a pronounced autumn warming maximum of up to 4.0°C per decade.
  • Confirmed that the warming pattern aligns with reductions in sea ice cover, consistent with reanalysis data.

Conclusions:

  • New observational data reveal a stronger rate of warming in the Barents Sea than previously estimated.
  • The relationship between sea ice concentration (SIC) and surface air temperature (SAT) is more pronounced than previously understood.
  • Findings underscore the need for improved observational networks in rapidly changing Arctic regions.