Effect of climate on morphology and development of sorted circles and polygons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F17%3A00476303" target="_blank" >RIV/67985530:_____/17:00476303 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10363796

Výsledek na webu

<a href="http://dx.doi.org/10.1002/ppp.1949" target="_blank" >http://dx.doi.org/10.1002/ppp.1949</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ppp.1949" target="_blank" >10.1002/ppp.1949</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of climate on morphology and development of sorted circles and polygons

Popis výsledku v původním jazyce

Sorted circles and polygons are widespread features of periglacial landscapes, but the controls on their development remain poorly understood, impeding their use as palaeoenvironmental indicators. We investigate the relationship of sorted circles and polygons to altitude in the northern Billefjorden area, central Svalbard. The patterns occur in two distinct elevation zones, below 200-250m asl and above 600m asl. The higher-elevated patterns have smaller diameters and shallower sorting depths due to a thinner active layer at higher elevations, suggesting that sorted patterns can indicate climate conditions and ground thermal state when the patterns initiated. Geology is believed to be of less importance for pattern morphology in the study area, causing only its fine-scale variations. The pattern diameter-to-sorting depth ratios have a median value of 3.57, consistent with previous studies and theoretical models of patterned-ground formation involving circulation mechanisms. Large-scale sorted patterns may develop over centennial timescales in this high-Arctic environment. They are probably not in equilibrium with present-day climate conditions and have probably formed throughout the Holocene.

Název v anglickém jazyce

Effect of climate on morphology and development of sorted circles and polygons

Popis výsledku anglicky

Sorted circles and polygons are widespread features of periglacial landscapes, but the controls on their development remain poorly understood, impeding their use as palaeoenvironmental indicators. We investigate the relationship of sorted circles and polygons to altitude in the northern Billefjorden area, central Svalbard. The patterns occur in two distinct elevation zones, below 200-250m asl and above 600m asl. The higher-elevated patterns have smaller diameters and shallower sorting depths due to a thinner active layer at higher elevations, suggesting that sorted patterns can indicate climate conditions and ground thermal state when the patterns initiated. Geology is believed to be of less importance for pattern morphology in the study area, causing only its fine-scale variations. The pattern diameter-to-sorting depth ratios have a median value of 3.57, consistent with previous studies and theoretical models of patterned-ground formation involving circulation mechanisms. Large-scale sorted patterns may develop over centennial timescales in this high-Arctic environment. They are probably not in equilibrium with present-day climate conditions and have probably formed throughout the Holocene.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/GA17-21612S" target="_blank" >GA17-21612S: Vývoj strukturních půd a jejich paleogeografický význam pro rekonstrukci přírodních podmínek střední Evropy v kvartéru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Permafrost and Periglacial Processes

ISSN

1045-6740

e-ISSN

—

Svazek periodika

28

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

663-674

Kód UT WoS článku

000413315700006

EID výsledku v databázi Scopus

2-s2.0-85020103748