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Intensified Arctic warming under greenhouse warming by vegetation–atmosphere–sea ice interaction

Title
Intensified Arctic warming under greenhouse warming by vegetation–atmosphere–sea ice interaction
Authors
Jeong, JHKUG, JONG SEONGLinderholm, HWChen, DLKim, BMJun, SY
POSTECH Authors
KUG, JONG SEONG
Date Issued
Sep-2014
Publisher
IOP PUBLISHING LTD
Abstract
Observations and modeling studies indicate that enhanced vegetation activities over high latitudes under an elevated CO2 concentration accelerate surface warming by reducing the surface albedo. In this study, we suggest that vegetation-atmosphere-sea ice interactions over high latitudes can induce an additional amplification of Arctic warming. Our hypothesis is tested by a series of coupled vegetation-climate model simulations under 2xCO(2) environments. The increased vegetation activities over high latitudes under a 2xCO(2) condition induce additional surface warming and turbulent heat fluxes to the atmosphere, which are transported to the Arctic through the atmosphere. This causes additional sea-ice melting and upper-ocean warming during the warm season. As a consequence, the Arctic and high-latitude warming is greatly amplified in the following winter and spring, which further promotes vegetation activities the following year. We conclude that the vegetation-atmosphere-sea ice interaction gives rise to additional positive feedback of the Arctic amplification.
Observations and modeling studies indicate that enhanced vegetation activities over high latitudes under an elevated CO2 concentration accelerate surface warming by reducing the surface albedo. In this study, we suggest that vegetation-atmosphere-sea ice interactions over high latitudes can induce an additional amplification of Arctic warming. Our hypothesis is tested by a series of coupled vegetation-climate model simulations under 2xCO(2) environments. The increased vegetation activities over high latitudes under a 2xCO(2) condition induce additional surface warming and turbulent heat fluxes to the atmosphere, which are transported to the Arctic through the atmosphere. This causes additional sea-ice melting and upper-ocean warming during the warm season. As a consequence, the Arctic and high-latitude warming is greatly amplified in the following winter and spring, which further promotes vegetation activities the following year. We conclude that the vegetation-atmosphere-sea ice interaction gives rise to additional positive feedback of the Arctic amplification.
URI
http://oasis.postech.ac.kr/handle/2014.oak/10164
DOI
10.1088/1748-9326/9/9/094007
ISSN
1748-9326
Article Type
Article
Citation
ENVIRONMENTAL RESEARCH LETTERS, vol. 9, no. 9, 2014-09
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국종성KUG, JONG SEONG
Div of Environmental Science & Enginrg
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