North african dust emissions and transport

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August undefined, 2024

Web[1] The dust activity over North Africa associated with the Saharan depression event in February 2007 is investigated by mean of spaceborne observations, ground‐based … Web1 de dez. de 2003 · North African dust has increased less, from 10 ± 4 Tg in the pre-industrial period to 14 ± 4 Tg in the modern climate, representing a 46 (2 -102) % …

Investigating the mechanisms driving the seasonal variations in …

WebThe cyclone provided a dynamical forcing that led to strong near-surface winds and produced a major dust storm over North Africa. The dust was transported all around … Web7 de nov. de 2003 · These quantitative estimates of trans-Atlantic dust transport offer important constraints on past changes in dust-related radiative and biogeochemical impacts and suggest that the amplifying feedback of dust on sea surface temperatures and regional climate may be significant and that accurate simulation of dust’s radiative effects is likely … cryptomnshots

North African dust export and deposition: A satellite and model ...

Webtrends over large areas of North Africa (including the Sahel) that are known to be major dust sources today and in the recent past. However, there are factors other than rainfall and dust source activity in Africa that could impact transport to the Caribbean (Engelstaedter et al. 2009). If we wish to understand present-day variability and Web14 de abr. de 2024 · Zhao C, Liu X, Leung LR, Johnson B, McFarlane SA, Gustafson WI, Fast JD, Easter R. The spatial distribution of mineral dust and its shortwave radiative … Web14 de dez. de 2024 · Here we show that on timescales of weeks to months, North African dust emission and transport are impacted by sudden stratospheric warmings (SSWs), … csdnchargpt

Dust emission and transport mechanisms in the central Sahara: …

[PDF] African Droughts and Dust Transport to the Caribbean: …

Web20 de jan. de 2012 · Once dust aerosol is lofted the long-range transport from Africa is influenced by the direction of the trade winds across the Atlantic, with African dust … Web1 de abr. de 2008 · The dust thus becomes available for long‐range transport by the harmattan. Because dust sources are widespread over the Sahel and presumably active on many days when the ITD is located in this region during summer, dust emissions associated with the described mechanism may influence the radiation budget over West … cscpmfbyWeb12 de fev. de 2024 · Global dust emissions Along with Central and Eastern Asia, the MENA significantly contributes to global dust emissions, which are in the range of … cryptowatcohlc

"WebSaharan dust emissions and transports are sensitive to weather and climate conditions in the source regions. Dense dust clouds reduce the ocean surface exposure to sunlight, hence, reducing the ocean surface heating and therefore influencing the air-sea transfer of water vapor and latent heat , which are critical to climate. [70] " - North african dust emissions and transport

North african dust emissions and transport

A new approach developed to study variability in North African dust ...

WebWinds formed by large-scale pressure gradients foster dust entrainment into the atmosphere over north African dust source regions and advection of dust downwind. The constellation of centers of high and low pressure determines wind speed and direction, and thus the chance for dust emission over northern Africa and transport toward the … Web10 de ago. de 2024 · 1 Introduction. It has been reported that the arid regions of North Africa emit approximately 800 Tg yr −1 of soil dust [Prospero and Mayol-Bracero, 2013].Large quantities of dust, e.g., a satellite-based study estimated a dust flux of 240 ± 80 Tg yr −1 [Kaufman et al., 2005] from the Saharan region, can undergo long-range …

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Webter constrain emission estimates in North Africa and to better characterize transport and deposition over the receptor region. Improved model performance will require a more … Web1 de dez. de 2024 · Similar synoptic-scale conditions and associated dust emission and westward transport lasted during the 14–19 June period ... (Figure S5), where a …

Web23 de mar. de 2016 · African dust emission and transport exhibits variability on diurnal1 to decadal2 timescales and is known to influence processes such as … WebAfrica has 63 transboundary river basins ( UNEP, 2010 ), 72 mapped transboundary aquifers ( Nijsten et al., 2024) and 33 transboundary lakes ( ILEC and UNEP, 2016 ), reflecting a highly water-connected and interdependent socio-ecological system across countries, also extending to the coastal areas of the continent (see Chapter 4 Section 4.1 ).

WebNorth Africa is one of the largest dust producing regions in the world with dust emissions being highly variable on time scales ranging from diurnal to multiannual. Changes in the … Web15 de jan. de 2024 · Since North African dust reaches South Amer-ica mostly during the Northern Hemisphere winter, the dust sources active during winter are the main contributors to the forest. Given that the Bod´el e depression area in southwestern´ Chad is the main winter dust source, a close link is expected between the Bodel´ ´e emission patterns …

Web27 de jun. de 2013 · A detailed analysis of the first ever high‐resolution ground‐based dust observations in the remote central Sahara is presented from observations at Bordj Badji …

Web30 de mai. de 2012 · Dust emissions over North Africa are closely coupled to the large-scale atmospheric circulation in the region and the pronounced seasonal and diurnal … csgoguofiWebAbstract. North Africa is the largest source of mineral dust on Earth, which has multiple impacts on the climate system; however, our understanding of decadal to centennial changes in African dust emissions over the last few millenniums is limited. Here, we present a high-resolution multiproxy analysis of sediment core from high-elevation Lake … csesf003Web8 de nov. de 2024 · This episode represents a dust transport situation over the Iberian Peninsula and the Mediterranean Sea similar to those classified as “North African High Located at Upper Levels” (NAH-A) and “Atlantic Depression” (AD) by Escudero et al. (2005). In this case, Atlantic low is displaced to the north, avoiding wet depositions. crystal goinsWeb9 de mai. de 2024 · African dust is transported to South America (SA) every winter and spring. Hypotheses suggest that either Western or Central North Africa (e.g., Bodélé Depression) is the main source of transported dust, yet these notions remain largely untested with geochemical data. csethalesflorWeb21 de jul. de 2024 · Every year, mineral-rich dust from North Africa's Sahara Desert is lifted into the atmosphere by winds and carried on a 5,000-mile journey across the North … csgoihooWeb7 de nov. de 2003 · Dust generation and drought patterns in Africa from helium‐4 in a modern Cape Verde coral. We show that helium‐4 (4He) concentrations in a modern … csgofenyunsheWebMineral dust mobilization in northern Africa is also enhanced after a rainfall reduction in the Soudano Sahel region [Prospero and Lamb, 2003] and, as a consequence, a reduced … csethalesrungis