Matches in SemOpenAlex for { <https://semopenalex.org/work/W4235351025> ?p ?o ?g. }
- W4235351025 abstract "Abstract. In a joint NRL/Manila Observatory mission, as part of the 7 SouthEast Asian Studies program (7SEAS), a two-week, late September~2011 research cruise in the northern Palawan Archipelago was undertaken to observe the nature of southwest monsoonal aerosol particles in the South China Sea/East Sea (SCS/ES) and Sulu Sea region. Previous analyses suggested this region as a~receptor for biomass burning from Borneo and Sumatra for boundary layer air entering the monsoonal trough. Anthropogenic pollution and biofuel emissions are also ubiquitous, as is heavy shipping traffic. Here, we provide an overview of the regional environment during the cruise, a time series of key aerosol and meteorological parameters, and their interrelationships. Overall, this cruise provides a~narrative of the processes that control regional aerosol loadings and their possible feedbacks with clouds and precipitation. While 2011 was a moderate El Nino/Southern Oscillation (ENSO) La Nina year, higher burning activity and lower precipitation was more typical of neutral conditions. The large-scale aerosol environment was modulated by the Madden–Julian Oscillation (MJO) and its associated tropical cyclone (TC) activity in a manner consistent with the conceptual analysis performed by Reid et al. (2012). Advancement of the MJO from phase 3 to 6 with accompanying cyclogenesis during the cruise period strengthened flow patterns in the SCS/ES that modulated aerosol lifecycle. TC inflow arms of significant convection sometimes span from Sumatra to Luzon, resulting in very low particle concentrations (minimum condensation nuclei CN < 150 cm−3, non-sea salt PM2.5=1μg m−3). However, elevated carbon monoxide levels were occasionally observed suggesting passage of polluted air masses whose aerosol particles had been rained out. Conversely, two drier periods occurred with higher aerosol particle concentrations originating from Borneo and Southern Sumatra (CN > 3000 cm−3 and non-sea salt PM2.510–25 μg m−3). These cases corresponded with two different mechanisms of convection suppression: lower free-tropospheric dry-air intrusion from the Indian Ocean, and large-scale TC-induced subsidence. Veering vertical wind shear also resulted in aerosol transport into this region being mainly in the marine boundary layer (MBL), although lower free troposphere transport was possible on the western sides of Sumatra and Borneo. At the hourly time scale, particle concentrations were observed to be modulated by integer factors through convection and associated cold pools. Geostationary satellite observations suggest that convection often takes the form of squall lines, which are bowed up to 500 km across the monsoonal flow and 50 km wide. These squall lines, initiated by cold pools from large thunderstorms and likely sustained by a veering vertical wind shear, propagated over 1500 km across the entirety of the SCS/ES-effectively cutting large swaths of MBL aerosol particles out of the region. Our conclusion is that while large-scale flow patterns are very important in modulating convection and hence allowing long range transport of smoke and pollution, more short-lived phenomena can modulate cloud condensation nuclei (CCN) concentrations in the region, resulting in pockets of clean and polluted MBL air." @default.
- W4235351025 created "2022-05-12" @default.
- W4235351025 creator A5005451060 @default.
- W4235351025 creator A5006367825 @default.
- W4235351025 creator A5009946940 @default.
- W4235351025 creator A5014472632 @default.
- W4235351025 creator A5015825469 @default.
- W4235351025 creator A5015995463 @default.
- W4235351025 creator A5016286782 @default.
- W4235351025 creator A5024866981 @default.
- W4235351025 creator A5028913453 @default.
- W4235351025 creator A5031089200 @default.
- W4235351025 creator A5033417940 @default.
- W4235351025 creator A5037413369 @default.
- W4235351025 creator A5039470746 @default.
- W4235351025 creator A5045725906 @default.
- W4235351025 creator A5046684574 @default.
- W4235351025 creator A5046694694 @default.
- W4235351025 creator A5051715709 @default.
- W4235351025 creator A5057603836 @default.
- W4235351025 creator A5061953305 @default.
- W4235351025 creator A5065245190 @default.
- W4235351025 creator A5076051412 @default.
- W4235351025 creator A5077473986 @default.
- W4235351025 creator A5077791267 @default.
- W4235351025 creator A5079868394 @default.
- W4235351025 date "2014-08-08" @default.
- W4235351025 modified "2023-10-17" @default.
- W4235351025 title "Observations of the temporal variability in aerosol properties and their relationships to meteorology in the summer monsoonal South China Sea/East Sea: the role of monsoonal flows, the Madden–Julian Oscillation, tropical cyclones, squall lines and cold pools" @default.
- W4235351025 cites W1615679349 @default.
- W4235351025 cites W1810865883 @default.
- W4235351025 cites W1838665942 @default.
- W4235351025 cites W1970630256 @default.
- W4235351025 cites W1971672330 @default.
- W4235351025 cites W1973401183 @default.
- W4235351025 cites W1975278507 @default.
- W4235351025 cites W1975875502 @default.
- W4235351025 cites W1978229857 @default.
- W4235351025 cites W1978811262 @default.
- W4235351025 cites W1979268012 @default.
- W4235351025 cites W1980301788 @default.
- W4235351025 cites W1984004659 @default.
- W4235351025 cites W1988880047 @default.
- W4235351025 cites W1988889904 @default.
- W4235351025 cites W2006683097 @default.
- W4235351025 cites W2007117779 @default.
- W4235351025 cites W2009745070 @default.
- W4235351025 cites W2011329066 @default.
- W4235351025 cites W2013376231 @default.
- W4235351025 cites W2013416665 @default.
- W4235351025 cites W2014079929 @default.
- W4235351025 cites W2020306346 @default.
- W4235351025 cites W2021657682 @default.
- W4235351025 cites W2022315359 @default.
- W4235351025 cites W2022467764 @default.
- W4235351025 cites W2025453528 @default.
- W4235351025 cites W2025713353 @default.
- W4235351025 cites W2030446719 @default.
- W4235351025 cites W2037139388 @default.
- W4235351025 cites W2039921487 @default.
- W4235351025 cites W2045900372 @default.
- W4235351025 cites W2046684780 @default.
- W4235351025 cites W2050196154 @default.
- W4235351025 cites W2050460160 @default.
- W4235351025 cites W2056889480 @default.
- W4235351025 cites W2066433058 @default.
- W4235351025 cites W2069785523 @default.
- W4235351025 cites W2070688354 @default.
- W4235351025 cites W2071123370 @default.
- W4235351025 cites W2072745528 @default.
- W4235351025 cites W2076192066 @default.
- W4235351025 cites W2081155601 @default.
- W4235351025 cites W2081729103 @default.
- W4235351025 cites W2082426215 @default.
- W4235351025 cites W2088556785 @default.
- W4235351025 cites W2089433206 @default.
- W4235351025 cites W2090784909 @default.
- W4235351025 cites W2095481863 @default.
- W4235351025 cites W2096345554 @default.
- W4235351025 cites W2098964970 @default.
- W4235351025 cites W2101394945 @default.
- W4235351025 cites W2104083727 @default.
- W4235351025 cites W2109248637 @default.
- W4235351025 cites W2129479849 @default.
- W4235351025 cites W2134144766 @default.
- W4235351025 cites W2138627013 @default.
- W4235351025 cites W2140936007 @default.
- W4235351025 cites W2144304061 @default.
- W4235351025 cites W2152069062 @default.
- W4235351025 cites W2155108279 @default.
- W4235351025 cites W2157016008 @default.
- W4235351025 cites W2160508458 @default.
- W4235351025 cites W2162047162 @default.
- W4235351025 cites W2172692435 @default.
- W4235351025 cites W4248700080 @default.
- W4235351025 cites W4251740616 @default.
- W4235351025 doi "https://doi.org/10.5194/acpd-14-20521-2014" @default.
- W4235351025 hasPublicationYear "2014" @default.
- W4235351025 type Work @default.
- W4235351025 citedByCount "0" @default.