Universität zu Köln

Albani, S., Mahowald, N. M., Murphy, L. N., Raiswell, R., Moore, J. K., Anderson, R. F., McGee, D., Bradtmiller, L. I., Delmonte, B., Hesse, P. P. and Mayewski, P. A. (2016). Paleodust variability since the Last Glacial Maximum and implications for iron inputs to the ocean. Geophys. Res. Lett., 43 (8). S. 3944 - 3955. WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 1944-8007

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Abstract

Changing climate conditions affect dust emissions and the global dust cycle, which in turn affects climate and biogeochemistry. In this study we use observationally constrained model reconstructions of the global dust cycle since the Last Glacial Maximum, combined with different simplified assumptions of atmospheric and sea ice processing of dust-borne iron, to provide estimates of soluble iron deposition to the oceans. For different climate conditions, we discuss uncertainties in model-based estimates of atmospheric processing and dust deposition to key oceanic regions, highlighting the large degree of uncertainty of this important variable for ocean biogeochemistry and the global carbon cycle. We also show the role of sea ice acting as a time buffer and processing agent, which results in a delayed and pulse-like soluble iron release into the ocean during the melting season, with monthly peaks up to similar to 17 Gg/month released into the Southern Oceans during the Last Glacial Maximum (LGM).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Albani, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mahowald, N. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murphy, L. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Raiswell, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Moore, J. K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Anderson, R. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED McGee, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bradtmiller, L. I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Delmonte, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hesse, P. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mayewski, P. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-278275
DOI:	10.1002/2016GL067911
Journal or Publication Title:	Geophys. Res. Lett.
Volume:	43
Number:	8
Page Range:	S. 3944 - 3955
Date:	2016
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	1944-8007
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MINERAL DUST; SOUTHERN-OCEAN; EQUATORIAL PACIFIC; AEOLIAN DUST; SEA-ICE; GLOBAL DISTRIBUTION; CLIMATE CONDITIONS; DESERT DUST; DEPOSITION; MODEL Multiple languages Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27827