Universität zu Köln

Pourmasoumi, Masoumeh ORCID: 0000-0003-2544-6044, Khormali, Farhad ORCID: 0000-0001-6805-7343, Ayoubi, Shamsollah, Kehl, Martin ORCID: 0000-0003-4587-5858 and Kiani, Farshad (2019). Development and magnetic properties of loess-derived forest soils along a precipitation gradient in northern Iran. J Mt. Sci., 16 (8). S. 1848 - 1869. BEIJING: SCIENCE PRESS. ISSN 1993-0321

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Abstract

In order to investigate the development of forest soils formed on loess, six representative modern soil pedons were selected along a precipitation gradient extending from eastern Golestan (mean annual precipitation, MAP = 500 mm) to eastern Mazandaran Provinces (MAP = 800 mm). Physiochemical, micromorphological and magnetic properties, as well as clay mineralogy of soils were studied using standard methods. Soils are mainly classified as Alfisols and Mollisols. Downward decalcification and the subsequent clay illuviation were the main criteria of soil development in all study areas. Pedogenic magnetic susceptibility of pedons studied varied systematically across the precipitation gradient in Northern Iran, increasing from 14.66 x 10(-8) m(3) kg(-1) at the eastern part to 83.75 x 10(-8) m(3) kg(-1) at the western margin of this transect. The frequencydependent magnetic susceptibility showed an increasing trend with rainfall as well. The micromorphological study of soils indicated that there is a positive relationship between climate gradient (increasing rainfall) and the micromorphological index of soil development (MISECA). The area and thickness of clay coatings showed an increasing trend with rainfall. Grain size analysis indicates that pedogenic processes are responsible for changing original grain size distribution of loess in our soils. The correlation achieved among modern soil properties and precipitation could be applied to the buried paleosols in the whole study area to refer degree of paleosol development and to reconstruct the paleoclimate.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pourmasoumi, Masoumeh UNSPECIFIED orcid.org/0000-0003-2544-6044 UNSPECIFIED Khormali, Farhad UNSPECIFIED orcid.org/0000-0001-6805-7343 UNSPECIFIED Ayoubi, Shamsollah UNSPECIFIED UNSPECIFIED UNSPECIFIED Kehl, Martin UNSPECIFIED orcid.org/0000-0003-4587-5858 UNSPECIFIED Kiani, Farshad UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-145974
DOI:	10.1007/s11629-018-5288-4
Journal or Publication Title:	J Mt. Sci.
Volume:	16
Number:	8
Page Range:	S. 1848 - 1869
Date:	2019
Publisher:	SCIENCE PRESS
Place of Publication:	BEIJING
ISSN:	1993-0321
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHINESE LOESS; GRAIN-SIZE; CALCAREOUS SOILS; FREQUENCY-DEPENDENCE; PALEOSOL SEQUENCES; FARS PROVINCE; SUSCEPTIBILITY; MICROMORPHOLOGY; CLIMATE; TOSHAN Multiple languages Environmental Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14597