ACP - pH dependence of brown-carbon optical properties in cloud water
Por um escritor misterioso
Last updated 08 agosto 2024
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://acp.copernicus.org/articles/23/14437/2023/acp-23-14437-2023-f07.png)
Abstract. Light-absorbing organic species present in aerosols, collectively called brown carbon (BrC), have important but highly uncertain effects on climate. Clouds likely represent a significant medium for secondary BrC production and for bleaching reactions, though the relative importance of the formation and loss processes in clouds is unknown at present. The acidity (or pH) of atmospheric particles and clouds affects the optical properties of BrC and bleaching rates. Given the wide variability of pH in the atmosphere (pH in particles and clouds ranges from −1 to 8), the optical properties of BrC and its bleaching behavior are expected to vary significantly, and the link between pH and BrC is yet another uncertainty in attempts to constrain its climate forcing effects. In this work, we characterize the pH dependence of BrC optical properties – including light absorption at 365 nm (Abs365), the mass absorption coefficient (MAC365), and the absorption Ångström exponent (AAE) – in bulk cloud water sampled from the summit of Whiteface Mountain, NY. In all samples (n=17), Abs365 and MAC365 increased linearly with increasing pH, highlighting the importance of reporting pH in studies of BrC in aqueous media. There was strong variability in the sensitivity of Abs365 to pH, with normalized slopes that ranged from 5.1 % to 17.2 % per pH unit. The normalized slope decreased strongly with increasing cloud water [K+], suggesting that the non-biomass-burning BrC has optical properties that are more sensitive to pH than BrC associated with biomass burning. AAE also showed a distinct pH dependence as it was relatively flat between pH 1.5–5 and then decreased significantly above pH 5. The cloud water composition was used to inform thermodynamic predictions of aerosol pH upwind and/or downwind of Whiteface Mountain and the subsequent changes in BrC optical properties. Overall, these results show that, in addition to secondary BrC production, photobleaching, and the altitudinal distribution, the climate forcing of BrC is quite strongly affected by its pH-dependent absorption.
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://acp.copernicus.org/articles/20/4809/2020/acp-20-4809-2020-avatar-web.png)
ACP - Relations - pH dependence of brown-carbon optical properties in cloud water
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://acp.copernicus.org/articles/20/2513/2020/acp-20-2513-2020-f05-web.png)
ACP - Molecular compositions and optical properties of dissolved brown carbon in biomass burning, coal combustion, and vehicle emission aerosols illuminated by excitation–emission matrix spectroscopy and Fourier transform ion cyclotron resonance mass
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://www.tandfonline.com/cms/asset/9595a69f-b25b-4ca7-9e43-7d1c91a24f19/uast_a_2267649_f0008_c.jpg)
Full article: Probing the pH dependence of brown carbon formation: Insights from laboratory studies on aerosol particles and bulk phase solutions
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://agupubs.onlinelibrary.wiley.com/cms/asset/7903d9b0-9c76-43a9-aed4-7f9b38dba742/jgrd53803-fig-0008-m.jpg)
Broadband optical properties of biomass‐burning aerosol and identification of brown carbon chromophores - Bluvshtein - 2017 - Journal of Geophysical Research: Atmospheres - Wiley Online Library
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://www.tandfonline.com/cms/asset/52b5a6ad-a0db-41fd-9be2-dbb0abf45e43/uast_a_2267649_f0003_c.jpg)
Full article: Probing the pH dependence of brown carbon formation: Insights from laboratory studies on aerosol particles and bulk phase solutions
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://aaqr.org/images/article_images/2020/feature/20-03-0085.png)
Spatial and Temporal Variability of Carbonaceous Aerosol Absorption in the Po Valley - Aerosol and Air Quality Research
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://acp.copernicus.org/articles/23/14437/2023/acp-23-14437-2023-f06-web.png)
ACP - pH dependence of brown-carbon optical properties in cloud water
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://pubs.acs.org/cms/10.1021/acsearthspacechem.0c00346/asset/images/large/sp0c00346_0013.jpeg)
Aging of Atmospheric Brown Carbon Aerosol
![ACP - pH dependence of brown-carbon optical properties in cloud water](https://ars.els-cdn.com/content/image/1-s2.0-S1352231022006380-gr4.jpg)
Molecular compositions and optical properties of water-soluble brown carbon during the autumn and winter in Guangzhou, China - ScienceDirect
Recomendado para você
-
Most Disturbed Person on Planet Earth (2013) - IMDb08 agosto 2024
-
Aging of Atmospheric Brown Carbon Aerosol08 agosto 2024
-
IJMS, Free Full-Text08 agosto 2024
-
Microorganisms, Free Full-Text08 agosto 2024
-
Stream Live 4 Internet Night.com OST - MDPOPE Unfinished Version Teaser by Josh Boss 308 agosto 2024
-
Trade-offs in forest disturbance management for plant communities and ungulates - ScienceDirect08 agosto 2024
-
Case 52-1991 — An Eight-Year-Old Girl with Recurrent Abdominal Distention after Surgical Correction of Hirschsprung's Disease08 agosto 2024
-
Molecular Basis of Chemokine CXCL5-Glycosaminoglycan Interactions - ScienceDirect08 agosto 2024
-
Most Disturbed Person On Planet Earth - MDPOPE 3 - Revisão Completa Do Filme08 agosto 2024
-
the blogspot website name mdpope2020has uploads about dangerous videos - Blogger Community08 agosto 2024
você pode gostar
-
Legend of Zelda Link's Awakening - Nintendo Switch : Nintendo of America08 agosto 2024
-
WHITEBEARD SWORD ONE PIECE - sword-anime08 agosto 2024
-
D The Vampire Hunter Film: Vampire Hunter D: Bloodlust (2000) 2508 agosto 2024
-
Aberturas de Xadrez Para Leigos PDF James Eade08 agosto 2024
-
KiraPika x Onmyoji Cosplay Series Blind Box - Kawaii Panda08 agosto 2024
-
Return of the Damned results. GGWP : r/Seaofthieves08 agosto 2024
-
Gps Sonar Garmin Echomap UHD 62CV Transdutor GT24UHD-TM 4 pinos 010-02329-01 - Loja Global Tech08 agosto 2024
-
Wyze Lock08 agosto 2024
-
Post Malone rockstar 2 Billion Spotify Streams08 agosto 2024
-
Subway Surfers Mod APK v3.21.1 Osmdroid Download 2023 - Subway Surfers08 agosto 2024