Sentences with phrase «dust deposition»

"Dust deposition" refers to the process of fine particles, like dust or dirt, settling down and accumulating on surfaces over time. Full definition
They note that the peak years of African dust deposition in the Caribbean match the years of major die - offs in the region's reefs.
The input of trace elements by dust deposition is also of importance to terrestrial ecosystems.
However, studies of sediment cores have shown that natural dust deposition has been in decline.
This good fit encourages us to seek dust deposition − temperature relationships by applying Eq.
A peat bog in Romania provides a new insight into our knowledge of when the Sahara began to transform from grassland into the desert we know today, and the impact this had on dust deposition within Eastern Europe.
Here we show that the presence of these lakes is associated with low levels of dust deposition in both West African and Mediterranean records, but is not associated with long - term global cooling and aridification of East Africa.
Special attention has been given to studying the effects of mineral dust deposition which is believed to promote N2 fixation as it increases the availability of both Fe and P. Three laboratory bioassays (+ Fe, + P, + Dust) via incubation experiments were performed on Trichodesmium IMS101, an important contributor to marine N2 fixation.
The objective of our research is to evaluate the effects of global climate change processes (changing dust deposition, ocean acidification and sea - surface warming) on phytoplankton growth, biological N2 fixation, biogeochemical cycles, and the controlling role of Fe within these impacts.
Glaser et al. show that dust deposition mediated by frequent tropical storms was an important source of nutrients for the Everglades until about 2800 years ago, when a climatic shift in the tropical Atlantic and Gulf of Mexico led to weather patterns that sharply decreased the level of dust inputs and led to a drier climate and a gradual loss of soil phosphorus, carbon, and nitrogen.
The determination of the vertical profile of water in the atmospheres of the outer planets and Titan is a diagnostic of its origin (e.g. cometary impact vs. permanent dust deposition), but also of the rate at which water is transported within and removed from the atmosphere (Hartogh et al. 2009).
These processes included dust deposition, and ocean acidification and warming, which were shown to have a significant impact on oceanic phytoplankton growth, cell size and primary productivity, biological N2 fixation, phytoplankton distribution and community composition.
The present study clearly highlights the effect of ocean acidification on enhancing the release of Fe upon dust deposition.
Persistent organic pollutant emission via dust deposition throughout Pakistan: Spatial patterns, regional cycling and their implication for human health risks
Over the past 3 Myrs, East African hominin species diversity and dispersal events are predicted by both lake presence and Mediterranean dust deposition (Table 2 and Figure S1 in File S1).
Dust Deposition Mechanism and Cleaning Strategy for Open Volumetric Air Receiver Based Solar Tower Sub-systems
The decline in dust deposition means the plankton has fewer nutrients to grow and thrive.
In a separate talk today, glaciologist Lonnie Thompson showed a new ice core data * from Huascarán in Peru, the highest tropical mountain, with a huge spike in dust deposition around this time.
For example, it has been proposed that the vegetation of the Amazon basin is highly dependent on Saharan dust deposition, which provides phosphorus, necessary for maintenance of long - term productivity (Okin et al., 2004; Section 7.3).
In a recent DCESS model application (25), IF needed to be increased to 0.50 to emulate the initial LGM pCO2 drawdown in a complex ocean biogeochemical model forced by observed LGM dust deposition.
Both dramatic warming events were preceded by decreasing Greenland dust deposition, indicating higher tropical temperatures and significantly more rain falling on the deserts of Asia at the time, said White.
Subsequently, the underlying trend towards increasing brain size in Homo is most strongly correlated with both decreases in lake presence and high levels of dust deposition in the Mediterranean ODP967 record (Table 3), indicating drier conditions in East Africa [43].
A secondary, but I suspect important longterm issue could be the effect of dust deposition on ocean chemistry and biology, and probably upon the ability of the ocean to sequester CO2.
Schultz says the streaks could prove useful in establishing rates of erosion and dust deposition in areas where the streaks are found.
A major source of bioavailable iron in Antarctica is from melting snow and dust deposition.
«Dust deposition, snow algae, wind and turbulence could bring further reductions,» he said.
But changes in dust deposition are not the primary culprit.
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