FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4214808601> ?p ?o ?g. }

• W4214808601 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Every year, large-scale African dust outbreaks frequently pass over the Canary Islands (Spain). Here we describe the seasonal evolution of atmospheric aerosol extinction and meteorological vertical profiles on Tenerife over the period 2007–2018 using long-term micropulse lidar (MPL-3) and radiosonde observations. These measurements are used to categorise the different patterns of dust transport over the subtropical North Atlantic and, for the first time, to robustly describe the dust vertical distribution in the Saharan Air Layer (SAL) over this region. Three atmospheric scenarios dominate the aerosol climatology: dust-free (clean) conditions, the Saharan summer scenario (summer-SAL) and the Saharan winter scenario (winter-SAL). <span id=page740/>A relatively well-mixed marine boundary layer (MBL) was observed in the case of clean (dust-free) conditions; it was associated with rather constant lidar extinction coefficients (<span class=inline-formula><i>α</i></span>) below 0.036 km<span class=inline-formula>^−1</span> with minimum <span class=inline-formula><i>α</i></span> (<span class=inline-formula><</span> 0.022 km<span class=inline-formula>^−1</span>) in the free troposphere (FT). The summer-SAL has been characterised as a dust-laden layer strongly affecting both the MBL (<span class=inline-formula>Δ<i>α</i></span> <span class=inline-formula>=</span> <span class=inline-formula>+</span>48 % relative to clean conditions) and the FT. The summer-SAL appears as a well-stratified layer, relatively dry at lower levels (<span class=inline-formula><math xmlns=http://www.w3.org/1998/Math/MathML id=M9 display=inline overflow=scroll dspmath=mathml><mrow><mi mathvariant=normal>Δ</mi><mi>r</mi><mo>∼</mo><mo>-</mo><mn mathvariant=normal>44</mn></mrow></math><span><svg:svg xmlns:svg=http://www.w3.org/2000/svg width=48pt height=10pt class=svg-formula dspmath=mathimg md5hash=4587f555832255851f3478276c38f90d><svg:image xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=acp-22-739-2022-ie00001.svg width=48pt height=10pt src=acp-22-739-2022-ie00001.png/></svg:svg></span></span> % at the SAL’s base, where <span class=inline-formula><i>r</i></span> is the water vapour mixing ratio) but more humid at higher levels compared with clean FT conditions (<span class=inline-formula><math xmlns=http://www.w3.org/1998/Math/MathML id=M11 display=inline overflow=scroll dspmath=mathml><mrow><mi mathvariant=normal>Δ</mi><mi>r</mi><mo>∼</mo><mo>+</mo><mn mathvariant=normal>332</mn></mrow></math><span><svg:svg xmlns:svg=http://www.w3.org/2000/svg width=54pt height=10pt class=svg-formula dspmath=mathimg md5hash=507ece2fb7b380f131e7fc3cbc8ea5aa><svg:image xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=acp-22-739-2022-ie00002.svg width=54pt height=10pt src=acp-22-739-2022-ie00002.png/></svg:svg></span></span> % at 5.3 km), with a peak of <span class=inline-formula><i>α</i>></span> 0.066 km<span class=inline-formula>^−1</span> at <span class=inline-formula>∼</span> 2.5 km. Desert dust is present up to <span class=inline-formula>∼</span> 6.0 km, the SAL top based on the altitude of SAL's temperature inversion. In the winter-SAL scenario, the dust layer is confined to lower levels below 2 km altitude. This layer is characterised by a dry anomaly at lower levels (<span class=inline-formula>Δ<i>r</i>∼</span> <span class=inline-formula>−</span>38 % in comparison to the clean scenario) and a dust peak at <span class=inline-formula>∼</span> 1.3 km height. Clean FT conditions were found above 2.3 km. Our results reveal the important role that both dust and water vapour play in the radiative balance within the summer-SAL and winter-SAL. The dominant dust-induced shortwave (SW) radiative warming in summer (heating rates up to <span class=inline-formula>+</span>0.7 K d<span class=inline-formula>^−1</span>) is found slightly below the dust maximum. However, the dominant contribution of water vapour was observed as a net SW warming observed within the SAL (from 2.1 to 5.7 km) and as a strong cold anomaly near the SAL's top (<span class=inline-formula>−</span>0.6 K d<span class=inline-formula>^−1</span>). The higher water vapour content found to be carried on the summer-SAL, despite being very low, represents a high relative variation in comparison to the very dry clean free troposphere in the subtropics. This relevant aspect should be properly taken into account in atmospheric modelling processes. In the case of the winter-SAL, we observed a dust-induced radiative effect dominated by SW heating (maximum heating of <span class=inline-formula>+</span>0.7 K d<span class=inline-formula>^−1</span> at 1.5 km, near the dust peak); both dust and atmospheric water vapour impact heating in the atmospheric column. This is the case of the SW heating within the SAL (maximum near the <span class=inline-formula><i>r</i></span> peak), the dry anomaly at lower levels (<span class=inline-formula>Δ<i>r</i>∼</span> <span class=inline-formula>−</span>38 % at 1 km) and the thermal cooling (<span class=inline-formula>∼</span> 0.3 K d<span class=inline-formula>^−1</span>) from the temperature inversion upwards. Finally, we hypothesise that the SAL can impact heterogeneous ice nucleation processes through the frequent occurrence of mid-level clouds observed near the SAL top at relatively warm temperatures. A dust event that affected Tenerife on August 2015 is simulated using the regional DREAM model to assess the role of dust and water vapour carried within SAL in the ice nucleation processes. The modelling results reproduce the arrival of the dust plume and its extension over the island and confirm the observed relationship between the summer-SAL conditions and the formation of mid- and high-level clouds." @default.
• W4214808601 created "2022-03-05" @default.
• W4214808601 date "2021-08-20" @default.
• W4214808601 modified "2023-10-05" @default.
• W4214808601 title "Comment on acp-2021-508" @default.
• W4214808601 doi "https://doi.org/10.5194/acp-2021-508-rc1" @default.
• W4214808601 hasPublicationYear "2021" @default.
• W4214808601 type Work @default.
• W4214808601 citedByCount "0" @default.
• W4214808601 crossrefType "peer-review" @default.
• W4214808601 hasBestOaLocation W42148086011 @default.
• W4214808601 hasConcept C101991246 @default.
• W4214808601 hasConcept C11999413 @default.
• W4214808601 hasConcept C121332964 @default.
• W4214808601 hasConcept C127313418 @default.
• W4214808601 hasConcept C127413603 @default.
• W4214808601 hasConcept C147176958 @default.
• W4214808601 hasConcept C153294291 @default.
• W4214808601 hasConcept C196558001 @default.
• W4214808601 hasConcept C199289684 @default.
• W4214808601 hasConcept C2778753569 @default.
• W4214808601 hasConcept C39432304 @default.
• W4214808601 hasConcept C51399673 @default.
• W4214808601 hasConcept C62649853 @default.
• W4214808601 hasConcept C86338904 @default.
• W4214808601 hasConcept C9075549 @default.
• W4214808601 hasConcept C91586092 @default.
• W4214808601 hasConceptScore W4214808601C101991246 @default.
• W4214808601 hasConceptScore W4214808601C11999413 @default.
• W4214808601 hasConceptScore W4214808601C121332964 @default.
• W4214808601 hasConceptScore W4214808601C127313418 @default.
• W4214808601 hasConceptScore W4214808601C127413603 @default.
• W4214808601 hasConceptScore W4214808601C147176958 @default.
• W4214808601 hasConceptScore W4214808601C153294291 @default.
• W4214808601 hasConceptScore W4214808601C196558001 @default.
• W4214808601 hasConceptScore W4214808601C199289684 @default.
• W4214808601 hasConceptScore W4214808601C2778753569 @default.
• W4214808601 hasConceptScore W4214808601C39432304 @default.
• W4214808601 hasConceptScore W4214808601C51399673 @default.
• W4214808601 hasConceptScore W4214808601C62649853 @default.
• W4214808601 hasConceptScore W4214808601C86338904 @default.
• W4214808601 hasConceptScore W4214808601C9075549 @default.
• W4214808601 hasConceptScore W4214808601C91586092 @default.
• W4214808601 hasLocation W42148086011 @default.
• W4214808601 hasOpenAccess W4214808601 @default.
• W4214808601 hasPrimaryLocation W42148086011 @default.
• W4214808601 hasRelatedWork W1981100059 @default.
• W4214808601 hasRelatedWork W2025185547 @default.
• W4214808601 hasRelatedWork W2059333282 @default.
• W4214808601 hasRelatedWork W2062912572 @default.
• W4214808601 hasRelatedWork W2091010257 @default.
• W4214808601 hasRelatedWork W2354946051 @default.
• W4214808601 hasRelatedWork W2380192360 @default.
• W4214808601 hasRelatedWork W3162875150 @default.
• W4214808601 hasRelatedWork W5920965 @default.
• W4214808601 hasRelatedWork W2142539838 @default.
• W4214808601 isParatext "false" @default.
• W4214808601 isRetracted "false" @default.
• W4214808601 workType "peer-review" @default.