Atmospheric mineral dust in dryland ecosystems: Applications of environmental magnetism
نویسندگان
چکیده
منابع مشابه
Alignment of atmospheric mineral dust
Alignment of atmospheric mineral dust due to electric field Z. Ulanowski, J. Bailey, P. W. Lucas, J. H. Hough, and E. Hirst Science and Technology Research Institute, Univ. of Hertfordshire, Hatfield AL10 9AB, UK Australian Centre for Astrobiology, Macquarie University, Sydney NSW 2109, Australia Received: 9 July 2007 – Accepted: 3 September 2007 – Published: 10 September 2007 Correspondence to...
متن کاملCarbon sequestration in dryland ecosystems.
Drylands occupy 6.15 billion hectares (Bha) or 47.2% of the world's land area. Of this, 3.5 to 4.0 Bha (57%-65%) are either desertified or prone to desertification. Despite the low soil organic carbon (SOC) concentration, total SOC pool of soils of the drylands is 241 Pg (1 Pg = petagram = 10(15)g = 1 billion metric ton) or 15.5% of the world's total of 1550 Pg to 1-meter depth. Desertification...
متن کاملAtmospheric processing outside clouds increases soluble iron in mineral dust.
Iron (Fe) is a key micronutrient regulating primary productivity in many parts of the global ocean. Dust deposition is an important source of Fe to the surface ocean, but most of this Fe is biologically unavailable. Atmospheric processing and reworking of Fe in dust aerosol can increase the bioavailable Fe inputs to the ocean, yet the processes are not well understood. Here, we experimentally s...
متن کاملDirect observations of the atmospheric processing of Asian mineral dust
The accumulation of secondary acids and ammonium on individual mineral dust particles during ACEAsia has been measured with an online single-particle mass spectrometer, the ATOFMS. Changes in the amounts of sulphate, nitrate, and chloride mixed with dust particles correlate with air masses from different source regions. The uptake of secondary acids depended on the individual dust particle mine...
متن کاملAlignment of atmospheric mineral dust due to electric field
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction indicating the presence of vertically aligned particles in the atmosphere. Modelling of the extinction together with particle orientation indicates that the alignment could have been due to an electric field of the order of 2 kV/m. Two alternative mechanisms for the origin of the...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2010
ISSN: 1525-2027
DOI: 10.1029/2010gc003103