气候变化领域集成服务门户(CCPortal): Total organic carbon and the contribution from speciated organics in cloud water: Airborne data analysis from the CAMP2Ex field campaign

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DOI	10.5194/acp-21-14109-2021
	Total organic carbon and the contribution from speciated organics in cloud water: Airborne data analysis from the CAMP2Ex field campaign
	Stahl C.; Crosbie E.; Bañaga P.A.; Betito G.; Braun R.A.; Cainglet Z.M.; Cambaliza M.O.; Cruz M.T.; Dado J.M.; Hilario M.R.A.; Leung G.F.; MacDonald A.B.; Magnaye A.M.; Reid J.; Robinson C.; Shook M.A.; Simpas J.B.; Visaga S.M.; Winstead E.; Ziemba L.; Sorooshian A.
发表日期	2021
ISSN	1680-7316
起始页码	14109
结束页码	14129
卷号	21 期号:18
英文摘要	This work focuses on total organic carbon (TOC) and contributing species in cloud water over Southeast Asia using a rare airborne dataset collected during NASA's Cloud, Aerosol and Monsoon Processes Philippines Experiment (CAMP2Ex), in which a wide variety of maritime clouds were studied, including cumulus congestus, altocumulus, altostratus, and cumulus. Knowledge of TOC masses and their contributing species is needed for improved modeling of cloud processing of organics and to understand how aerosols and gases impact and are impacted by clouds. This work relies on 159 samples collected with an axial cyclone cloud-water collector at altitudes of 0.2-6.8ĝ€¯km that had sufficient volume for both TOC and speciated organic composition analysis. Species included monocarboxylic acids (glycolate, acetate, formate, and pyruvate), dicarboxylic acids (glutarate, adipate, succinate, maleate, and oxalate), methanesulfonic acid (MSA), and dimethylamine (DMA). TOC values range between 0.018 and 13.66ĝ€¯ppmĝ€¯C with a mean of 0.902ĝ€¯ppm C. The highest TOC values are observed below 2ĝ€¯km with a general reduction aloft. An exception is samples impacted by biomass burning for which TOC remains enhanced at altitudes as high as 6.5ĝ€¯km (7.048ĝ€¯ppmĝ€¯C). Estimated total organic matter derived from TOC contributes a mean of 30.7ĝ€¯% to total measured mass (inorganics + organics). Speciated organics contribute (on a carbon mass basis) an average of 30.0ĝ€¯% to TOC in the study region and account for an average of 10.3ĝ€¯% to total measured mass. The order of the average contribution of species to TOC, in decreasing contribution of carbon mass, is as follows (±1 standard deviation): acetate (14.7ĝ€¯±ĝ€¯20.5ĝ€¯%), formate (5.4ĝ€¯±ĝ€¯9.3ĝ€¯%), oxalate (2.8ĝ€¯±ĝ€¯4.3ĝ€¯%), DMA (1.7ĝ€¯±ĝ€¯6.3ĝ€¯%), succinate (1.6ĝ€¯±ĝ€¯2.4ĝ€¯%), pyruvate (1.3ĝ€¯±ĝ€¯4.5ĝ€¯%), glycolate (1.3ĝ€¯±ĝ€¯3.7ĝ€¯%), adipate (1.0ĝ€¯±ĝ€¯3.6ĝ€¯%), MSA (0.1ĝ€¯±ĝ€¯0.1ĝ€¯%), glutarate (0.1ĝ€¯±ĝ€¯0.2ĝ€¯%), and maleate (<ĝ€¯0.1ĝ€¯±ĝ€¯0.1ĝ€¯%). Approximately 70ĝ€¯% of TOC remains unaccounted for, highlighting the complex nature of organics in the study region; in samples collected in biomass burning plumes, up to 95.6ĝ€¯% of TOC mass is unaccounted for based on the species detected. Consistent with other regions, monocarboxylic acids dominate the speciated organic mass (g1/4ĝ€¯75ĝ€¯%) and are about 4 times more abundant than dicarboxylic acids. Samples are categorized into four cases based on back-trajectory history, revealing source-independent similarity between the bulk contributions of monocarboxylic and dicarboxylic acids to TOC (16.03ĝ€¯%-23.66ĝ€¯% and 3.70ĝ€¯%-8.75ĝ€¯%, respectively). Furthermore, acetate, formate, succinate, glutarate, pyruvate, oxalate, and MSA are especially enhanced during biomass burning periods, which is attributed to peat emissions transported from Sumatra and Borneo. Lastly, dust (Ca2+) and sea salt (Na+/Cl-) tracers exhibit strong correlations with speciated organics, supporting how coarse aerosol surfaces interact with these water-soluble organics. © Copyright:
语种	英语
scopus关键词	biomass burning; cloud microphysics; cumulus; dust; emission inventory; marine atmosphere; peat; sea salt; speciation (chemistry); stratus; total organic carbon; water vapor; Borneo; Greater Sunda Islands; Philippines; Southeast Asia; Sumatra; Sunda Isles
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246565
作者单位	Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, United States; Nasa Langley Research Center, Hampton, VA 23666, United States; Science Systems and Applications Inc., Hampton, VA 23666, United States; Air Quality Dynamics-Instrumentation and Technology Development Laboratory, Manila Observatory, Quezon City, 1108, Philippines; Department of Physics ,School of Science and Engineering, Ateneo de Manila University, Quezon City, 1108, Philippines; Institute of Environmental Science and Meteorology, University of the Philippines, Diliman, 1101, Philippines; Regional Climate Systems Laboratory, Manila Observatory, Quezon City, 1108, Philippines; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80521, United States; Marine Meteorology Division, Naval Research Laboratory, Monterey, CA 93943, United States
推荐引用方式 GB/T 7714	Stahl C.,Crosbie E.,Bañaga P.A.,et al. Total organic carbon and the contribution from speciated organics in cloud water: Airborne data analysis from the CAMP2Ex field campaign[J],2021,21(18).
APA	Stahl C..,Crosbie E..,Bañaga P.A..,Betito G..,Braun R.A..,...&Sorooshian A..(2021).Total organic carbon and the contribution from speciated organics in cloud water: Airborne data analysis from the CAMP2Ex field campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(18).
MLA	Stahl C.,et al."Total organic carbon and the contribution from speciated organics in cloud water: Airborne data analysis from the CAMP2Ex field campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.18(2021).