FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4306867599> ?p ?o ?g. }

• W4306867599 endingPage "6010" @default.
• W4306867599 startingPage "5985" @default.
• W4306867599 abstract "Abstract. Uncertainty-bounded satellite retrievals of volcanic ash cloud properties such as ash cloud-top height, effective radius, optical depth and mass loading are needed for the robust quantitative assessment required to warn aviation of potential hazards. Moreover, there is an imperative to improve quantitative ash cloud estimation due to the planned move towards quantitative ash concentration forecasts by the Volcanic Ash Advisory Centers. Here we apply the Optimal Retrieval of Aerosol and Cloud (ORAC) algorithm to Advanced Himawari Imager (AHI) measurements of the ash clouds produced by the June 2019 Raikoke (Russia) eruption. The ORAC algorithm uses an optimal estimation technique to consolidate a priori information, satellite measurements and associated uncertainties into uncertainty-bounded estimates of the desired state variables. Using ORAC, we demonstrate several improvements in thermal infrared volcanic ash retrievals applied to broadband imagers. These include an improved treatment of measurement noise, accounting for multi-layer cloud scenarios, distinguishing between heights in the troposphere and stratosphere, and the retrieval of a wider range of effective radii sizes than existing techniques by exploiting information from the 10.4 µm channel. Our results indicate that 0.73 ± 0.40 Tg of very fine ash (radius ≤ 15 µm) was injected into the atmosphere during the main eruptive period from 21 June 18:00 UTC to 22 June 10:00 UTC. The total mass of very fine ash decreased from 0.73 to 0.10 Tg over ∼ 48 h, with an e-folding time of 20 h. We estimate a distal fine ash mass fraction of 0.73 % ± 0.62 % based on the total mass of very fine ash retrieved and the ORAC-derived height–time series. Several distinct ash layers were revealed by the ORAC height retrievals. Generally, ash in the troposphere was composed of larger particles than ash present in the stratosphere. We also find that median ash cloud concentrations fall below peak ash concentration safety limits (< 4 mg m−3) 11–16 h after the eruption begins, if typical ash cloud geometric thicknesses are assumed. The ORAC height retrievals for the near-source plume showed good agreement with GOES-17 side-view height data (R=0.84; bias = −0.75 km); however, a larger negative bias was found when comparing ORAC height retrievals for distal ash clouds against Cloud-Aerosol Lidar with Orthogonal Polarisation (CALIOP) measurements (R=0.67; bias = −2.67 km). The dataset generated here provides uncertainties at the pixel level for all retrieved variables and could potentially be used for dispersion model validation or be implemented in data assimilation schemes. Future work should focus on improving ash detection, improving height estimation in the stratosphere and exploring the added benefit of visible channels for retrieving effective radius and optical depth in opaque regions of nascent ash plumes." @default.
• W4306867599 created "2022-10-20" @default.
• W4306867599 creator A5017656982 @default.
• W4306867599 creator A5020309222 @default.
• W4306867599 creator A5042054957 @default.
• W4306867599 creator A5060438465 @default.
• W4306867599 creator A5060516420 @default.
• W4306867599 creator A5088853790 @default.
• W4306867599 date "2022-10-20" @default.
• W4306867599 modified "2023-10-15" @default.
• W4306867599 title "Uncertainty-bounded estimates of ash cloud properties using the ORAC algorithm: application to the 2019 Raikoke eruption" @default.
• W4306867599 cites W1496340422 @default.
• W4306867599 cites W1506353207 @default.
• W4306867599 cites W1606148469 @default.
• W4306867599 cites W16372552 @default.
• W4306867599 cites W1754725192 @default.
• W4306867599 cites W1804424319 @default.
• W4306867599 cites W1822467393 @default.
• W4306867599 cites W1822557503 @default.
• W4306867599 cites W1830081507 @default.
• W4306867599 cites W1840661813 @default.
• W4306867599 cites W1954979484 @default.
• W4306867599 cites W1966104729 @default.
• W4306867599 cites W1970436941 @default.
• W4306867599 cites W1979558372 @default.
• W4306867599 cites W1989778073 @default.
• W4306867599 cites W1994970513 @default.
• W4306867599 cites W1997384657 @default.
• W4306867599 cites W1997731026 @default.
• W4306867599 cites W2007233406 @default.
• W4306867599 cites W2016304835 @default.
• W4306867599 cites W2019190077 @default.
• W4306867599 cites W2029456272 @default.
• W4306867599 cites W2038963893 @default.
• W4306867599 cites W2040543587 @default.
• W4306867599 cites W2049891650 @default.
• W4306867599 cites W2052886694 @default.
• W4306867599 cites W2053870625 @default.
• W4306867599 cites W2056813885 @default.
• W4306867599 cites W2066411716 @default.
• W4306867599 cites W2067589378 @default.
• W4306867599 cites W2080278412 @default.
• W4306867599 cites W2083704296 @default.
• W4306867599 cites W2087070363 @default.
• W4306867599 cites W2115334653 @default.
• W4306867599 cites W2117269866 @default.
• W4306867599 cites W2121556391 @default.
• W4306867599 cites W2129228340 @default.
• W4306867599 cites W2130805251 @default.
• W4306867599 cites W2136520800 @default.
• W4306867599 cites W2137243858 @default.
• W4306867599 cites W2141146403 @default.
• W4306867599 cites W2144991971 @default.
• W4306867599 cites W2153120705 @default.
• W4306867599 cites W2153504150 @default.
• W4306867599 cites W2154612353 @default.
• W4306867599 cites W2158670705 @default.
• W4306867599 cites W2161669521 @default.
• W4306867599 cites W2163313249 @default.
• W4306867599 cites W216782767 @default.
• W4306867599 cites W2170744622 @default.
• W4306867599 cites W2171399540 @default.
• W4306867599 cites W2237749520 @default.
• W4306867599 cites W2256578114 @default.
• W4306867599 cites W2291372941 @default.
• W4306867599 cites W2295340834 @default.
• W4306867599 cites W2345254164 @default.
• W4306867599 cites W2417026208 @default.
• W4306867599 cites W2519869923 @default.
• W4306867599 cites W2526147768 @default.
• W4306867599 cites W2584422654 @default.
• W4306867599 cites W2755179215 @default.
• W4306867599 cites W2765396995 @default.
• W4306867599 cites W2781534587 @default.
• W4306867599 cites W2791517694 @default.
• W4306867599 cites W2902070904 @default.
• W4306867599 cites W2912037561 @default.
• W4306867599 cites W2982261028 @default.
• W4306867599 cites W2994658945 @default.
• W4306867599 cites W3001312438 @default.
• W4306867599 cites W3009931749 @default.
• W4306867599 cites W3015796965 @default.
• W4306867599 cites W3016063104 @default.
• W4306867599 cites W3025949386 @default.
• W4306867599 cites W3036696024 @default.
• W4306867599 cites W3051556930 @default.
• W4306867599 cites W3087838721 @default.
• W4306867599 cites W3092594364 @default.
• W4306867599 cites W3107066182 @default.
• W4306867599 cites W3107131173 @default.
• W4306867599 cites W3120130378 @default.
• W4306867599 cites W3145105259 @default.
• W4306867599 cites W3145807109 @default.
• W4306867599 cites W3183912038 @default.
• W4306867599 cites W3185295043 @default.
• W4306867599 cites W3187921311 @default.
• W4306867599 cites W4206585117 @default.
• W4306867599 cites W4210494271 @default.

• next