Mineral Dust Instantaneous Radiative Forcing in the Arctic

A. Kylling; C. D. Groot Zwaaftink; A. Stohl

doi:10.1029/2018GL077346

Mineral Dust Instantaneous Radiative Forcing in the Arctic

A. Kylling
, C. D. Groot Zwaaftink
, A. Stohl

Department of Meteorology and Geophysics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Mineral dust sources at high and low latitudes contribute to atmospheric dust loads and dust deposition in the Arctic. With dust load estimates from Groot Zwaaftink et al. (, https://doi.org/10.1002/2016JD025482), we quantify the mineral dust instantaneous radiative forcing (IRF) in the Arctic for the year 2012. The annual-mean top of the atmosphere IRF is 0.225 W/m², with the largest contributions from dust transported from Asia south of 60°N and Africa. High-latitude (>60°N) dust sources contribute about 39% to top of the atmosphere IRF and have a larger impact (1 to 2 orders of magnitude) on IRF per emitted kilogram of dust than low-latitude sources. Mineral dust deposited on snow accounts for nearly all of the bottom of the atmosphere IRF of 0.135 W/m². More than half of the bottom of the atmosphere IRF is caused by dust from high-latitude sources, indicating substantial regional climate impacts rarely accounted for in current climate models.

Original language	English
Pages (from-to)	4290-4298
Number of pages	9
Journal	Geophysical Research Letters
Volume	45
Issue number	9
DOIs	https://doi.org/10.1029/2018GL077346
Publication status	Published - 16 May 2018

Funding

M. G. Flanner is kindly acknowledged for making the SNICAR model available (http://snow.engin.umich.edu/). Mineral dust data are from Groot Zwaaftink et al. (2016) and available upon request. The FLEXPART source code is available from www.flexpart.eu. The libRadtran model is available from www.libradtran.org. A. K. acknowledges support from the Research Council of Norway (contract 262637). C. D. G. Z. acknowledges funding provided by the Swiss National Science Foundation. C. D. G. Z. and A. S. were partly supported by Nordforsk in the Nordic Center of Excellence eSTICC (Nordforsk 57001). Thanks to the two anonymous reviewers whose valuable comments greatly improved the paper.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Austrian Fields of Science 2012

105206 Meteorology

Keywords

Arctic
mineral dust
radiative forcing

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10.1029/2018GL077346

Cite this

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title = "Mineral Dust Instantaneous Radiative Forcing in the Arctic",

abstract = "Mineral dust sources at high and low latitudes contribute to atmospheric dust loads and dust deposition in the Arctic. With dust load estimates from Groot Zwaaftink et al. (, https://doi.org/10.1002/2016JD025482), we quantify the mineral dust instantaneous radiative forcing (IRF) in the Arctic for the year 2012. The annual-mean top of the atmosphere IRF is 0.225 W/m2, with the largest contributions from dust transported from Asia south of 60°N and Africa. High-latitude (>60°N) dust sources contribute about 39\% to top of the atmosphere IRF and have a larger impact (1 to 2 orders of magnitude) on IRF per emitted kilogram of dust than low-latitude sources. Mineral dust deposited on snow accounts for nearly all of the bottom of the atmosphere IRF of 0.135 W/m2. More than half of the bottom of the atmosphere IRF is caused by dust from high-latitude sources, indicating substantial regional climate impacts rarely accounted for in current climate models.",

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T1 - Mineral Dust Instantaneous Radiative Forcing in the Arctic

AU - Kylling, A.

AU - Groot Zwaaftink, C. D.

AU - Stohl, A.

PY - 2018/5/16

Y1 - 2018/5/16

N2 - Mineral dust sources at high and low latitudes contribute to atmospheric dust loads and dust deposition in the Arctic. With dust load estimates from Groot Zwaaftink et al. (, https://doi.org/10.1002/2016JD025482), we quantify the mineral dust instantaneous radiative forcing (IRF) in the Arctic for the year 2012. The annual-mean top of the atmosphere IRF is 0.225 W/m2, with the largest contributions from dust transported from Asia south of 60°N and Africa. High-latitude (>60°N) dust sources contribute about 39% to top of the atmosphere IRF and have a larger impact (1 to 2 orders of magnitude) on IRF per emitted kilogram of dust than low-latitude sources. Mineral dust deposited on snow accounts for nearly all of the bottom of the atmosphere IRF of 0.135 W/m2. More than half of the bottom of the atmosphere IRF is caused by dust from high-latitude sources, indicating substantial regional climate impacts rarely accounted for in current climate models.

AB - Mineral dust sources at high and low latitudes contribute to atmospheric dust loads and dust deposition in the Arctic. With dust load estimates from Groot Zwaaftink et al. (, https://doi.org/10.1002/2016JD025482), we quantify the mineral dust instantaneous radiative forcing (IRF) in the Arctic for the year 2012. The annual-mean top of the atmosphere IRF is 0.225 W/m2, with the largest contributions from dust transported from Asia south of 60°N and Africa. High-latitude (>60°N) dust sources contribute about 39% to top of the atmosphere IRF and have a larger impact (1 to 2 orders of magnitude) on IRF per emitted kilogram of dust than low-latitude sources. Mineral dust deposited on snow accounts for nearly all of the bottom of the atmosphere IRF of 0.135 W/m2. More than half of the bottom of the atmosphere IRF is caused by dust from high-latitude sources, indicating substantial regional climate impacts rarely accounted for in current climate models.

KW - Arctic

KW - mineral dust

KW - radiative forcing

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DO - 10.1029/2018GL077346

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ER -

Mineral Dust Instantaneous Radiative Forcing in the Arctic

Abstract

Funding

UN SDGs

Austrian Fields of Science 2012

Keywords

Access to Document

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