Dark zone of the Greenland Ice Sheet controlled by distributed biologically-active impurities

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10386928" target="_blank" >RIV/00216208:11310/18:10386928 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1038/s41467-018-03353-2" target="_blank" >https://doi.org/10.1038/s41467-018-03353-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-018-03353-2" target="_blank" >10.1038/s41467-018-03353-2</a>

Result language

angličtina

Original language name

Dark zone of the Greenland Ice Sheet controlled by distributed biologically-active impurities

Original language description

Albedo-a primary control on surface melt-varies considerably across the Greenland Ice Sheet yet the specific surface types that comprise its dark zone remain unquantified. Here we use UAV imagery to attribute seven distinct surface types to observed albedo along a 25 km transect dissecting the western, ablating sector of the ice sheet. Our results demonstrate that distributed surface impurities-an admixture of dust, black carbon and pigmented algae-explain 73% of the observed spatial variability in albedo and are responsible for the dark zone itself. Crevassing and supraglacial water also drive albedo reduction but due to their limited extent, explain just 12 and 15% of the observed variability respectively. Cryoconite, concentrated in large holes or fluvial deposits, is the darkest surface type but accounts for &lt; 1% of the area and has minimal impact. We propose that the ongoing emergence and dispersal of distributed impurities, amplified by enhanced ablation and biological activity, will drive future expansion of Greenland&apos;s dark zone.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Communications [online]

ISSN

2041-1723

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

March

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

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UT code for WoS article

000427376600004

EID of the result in the Scopus database

2-s2.0-85044250345