A pseudo-Lagrangian study of the sulfur budget in the remote Arctic marine boundary layer     

E. DOUGLAS NILSSON  CAROLINE LECK 《Tellus. Series B, Chemical and physical meteorology》2002,54(3):213-230

The atmospheric sulfur cycle of the remote Arctic marine boundary layer is studied using trajectories and measurements of sulfur compounds from the International Arctic Ocean Expedition 1991, along with a pseudo-Lagrangian approach and an analytical model. The dimethyl sulfide [DMS(g)] turnover time was  h. Only  % of DMS(g) followed reaction paths to sulfur dioxide [SO₂(g)], sub-micrometre aerosol non-seasalt sulfate (nss-SO₄²⁻) or methane sulfonate (MSA). During the first 3 d of transport over the pack ice, fog deposition and drizzle resulted in short turnover times;  h for SO₂(g),  h for MSA and  h for nss-SO₄²⁻. Therefore, DMS(g) will, owing to its origin along or south of the ice edge and longer turnover time, survive the original sub-micrometre sulfur aerosol mass and gradually replace it with new biogenic sulfur aerosol mass. The advection of DMS(g) along with heat and moisture will influence the clouds and fogs over the Arctic pack ice through the formation of cloud condensation nuclei (CCN). If the pack ice cover were to decrease owing to a climate change, the total Arctic Ocean DMS production would change, and potentially there could be an ice–DMS–cloud–albedo climate feedback effect, but it would be accompanied by changes in the fog aerosol sink.  相似文献   

Environmental controls on the CO₂ exchange in north European mires     

ANDERS LINDROTH  MAGNUS LUND  MATS NILSSON  MIKA AURELA  TORBEN RÖJLE CHRISTENSEN  TUOMAS LAURILA  JANNE RINNE  TERHI RIUTTA  JÖRGEN SAGERFORS  LENA STRÖM  JUHA-PEKKA TUOVINEN  TIMO VESALA 《Tellus. Series B, Chemical and physical meteorology》2007,59(5):812-825

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FALLING DROP USED FOR GRAIN-SIZE ANALYSIS OF FINE-GRAINED MATERIALS     

JOHAN MOUM 《Sedimentology》1965,5(4):343-347

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RECONSTRUCTION OF PALAEO-ICE SHEETS: THE USE OF GEOMORPHOLOGICAL DATA     

JOHAN KLEMAN  INGMAR BORGSTR M 《地球表面变化过程与地形》1996,21(10):893-909

The article discusses the nature of the glacial inversion problem, which is defined as the extraction of time-slice ice-sheet flow patterns from the patchy and partly overprinted landform record present in former ice-sheet areas. A coherent inversion model for derivation of flow patterns and interior ice-sheet configuration from geomorphological data is presented. Glacial landscapes are classified according to the three criteria of internal age gradients, presence or absence of meltwater traces aligned to flow traces, and basal condition (frozen bed/thawed bed) inferred from morphology. The inversion model uses landscapes classified accordingly, spatially delineated into fans, as input data. Relative chronologies at fan intersections are used to sort fans in a relative-age stack that can be linked to stratigraphic (dating) information.  相似文献