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Researchers discover the dynamics behind the outstanding August 2018 Greenland polynya formation – ?


Peer-Reviewed Publication

INSTITUTE OF ATMOSPHERIC PHYSICS, CHINESE ACADEMY OF SCIENCES

polynya
IMAGE: A REMARKABLE POLYNYA OCCURRED NORTH OF GREENLAND DURING AUGUST 2018. view extra CREDIT: PHOTO FROM NASA WORLDVIEW APPLICATION, PART OF THE NASA EARTH OBSERVING SYSTEM DATA AND INFORMATION SYSTEM (EOSDIS)

A polynya is a area of open water that’s surrounded by sea ice. These areas fluctuate all through seasons, and climate occasions can affect their measurement and growth. Extraordinarily excessive wind in February 2018 led to a polynya that developed within the Wandel Sea off the coast of Greenland. Climatologists have by no means noticed such a pronounced polynya because the starting of the satellite tv for pc period. Then, six months later, in August 2018, a polynya appeared once more. A staff of scientists, desirous to be taught extra about this uncommon occasion, utilized a complete dataset to analyze the consequences of environment, sea ice, and ocean on the August polynya formation.

“We discovered that the thinnest sea ice cowl in August since 1978 and the modest southerly wind have been liable for the formation and upkeep of this polynya.” stated main writer Prof. Chang-Qing Ke. with Nanjing College.“Sea ice drift patterns have turn into extra attentive to atmospheric forcing on account of thinning of sea ice cowl with local weather change.”

Prof. Ke, alongside a number of different polynya researchers revealed their full leads to Advances in Atmospheric Sciences. The examine means that the regional wind has a profound affect on Arctic polynyas. Likewise, excessive wind performed a necessary position within the February polynya formation.

Nonetheless, in the course of the summer time, thermodynamic results are additionally vital to polynya formation. Understanding and predicting Arctic polynya formation requires extra exact data of each the dynamic (e.g., wind-induced sea ice drift) and thermodynamic (e.g., upwell warmth) processes throughout polynya growth.

It is a difficult activity as a result of Arctic areas are distant and lack plentiful floor observations. Scientists are principally restricted to utilized satellite tv for pc or mannequin knowledge. For additional analysis, extra in-situ satellite tv for pc knowledge is required for detailed investigations into summer time polynyas. This extra knowledge ought to assist higher predict the thermodynamic results on the time of opening and extent of the polynyas.


JOURNAL

Advances in Atmospheric Sciences

DOI

10.1007/s00376-021-0136-9 

ARTICLE TITLE

Thinner Sea Ice Contribution to the Outstanding Polynya Formation North of Greenland in August 2018

ARTICLE PUBLICATION DATE

24-Jun-2021

From EurekAlert!



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