Photothermal Monitor for Black Carbon Mass Concentration using a Fiber-Coupled Fabry-Perót Interferometer

2021 ◽  
Author(s):  
Ulrich Radeschnig ◽  
Markus Knoll ◽  
Benjamin Lang ◽  
Alexander Bergmann
Keyword(s):  
Black Carbon ◽  
Mass Concentration ◽  
Fabry Perot ◽  
Carbon Mass

scholarly journals Spatial Characterization of Black Carbon Mass Concentration in the Atmosphere of a Southeast Asian Megacity: An Air Quality Case Study for Metro Manila, Philippines

2018 ◽  
Vol 18 (9) ◽  
pp. 2301-2317 ◽  
Author(s):  
Honey Dawn Alas ◽  
Thomas Müller ◽  
Wolfram Birmili ◽  
Simonas Kecorius ◽  
Maria Obiminda Cambaliza ◽  
...  
Keyword(s):  
Air Quality ◽  
Black Carbon ◽  
Mass Concentration ◽  
Southeast Asian ◽  
Spatial Characterization ◽  
Metro Manila ◽  
Carbon Mass

Should black carbon concentration from aethalometer measurements onboard of UAVs be additionally corrected? - What is the impact of rapid relative humidity changes on our measurements?

2021 ◽  
Author(s):  
Grzegorz Florczyk ◽  
Krzysztof Markowicz
Keyword(s):  
Relative Humidity ◽  
Black Carbon ◽  
Mass Concentration ◽  
Strong Dependence ◽  
Correction Method ◽  
Atmospheric Measurements ◽  
Atmospheric Sciences ◽  
Humidity Chamber ◽  
Carbon Mass ◽  
The Impact

<p>Relative humidity and rates of its change are relevant parameters in atmospheric sciences. Observations of output data of AE-51 aethalometer operating in ACS1000 humidity chamber reveal strong dependence of attenuation on rapid relative humidity changes. Data collected in winter 2020/21 suggests a probability of similar effect occurring during UAV measurements as thermodynamic parameters could change fast during such runs. Two AE-51 devices were connected in the WET and DRY ACS1000 humidity chamber's channels. During periodic relative humidity oscillations, incident negative peaks of equivalent black carbon mass concentration coincide with high negative derivatives of relative humidity. In most extreme cases values of -1000 ng/m3 equivalent black carbon mass concentration were recorded in parallel with relative humidity derivative of -1.5 %/min. These correlations seem to play an important role in atmospheric measurements as vertical profiles of aerosol parameters such as attenuation are collected using UAV runs during which relative humidity varies significantly. Our goal is to propose a correction method to minimise these anomalies.</p>

scholarly journals Supplementary material to "Variability of Black Carbon mass concentration in surface snow at Svalbard"

2021 ◽  
Author(s):  
Michele Bertò ◽  
David Cappelletti ◽  
Elena Barbaro ◽  
Cristiano Varin ◽  
Jean-Charles Gallet ◽  
...  
Keyword(s):  
Black Carbon ◽  
Mass Concentration ◽  
Surface Snow ◽  
Carbon Mass ◽  
Supplementary Material

scholarly journals Variability in black carbon mass concentration in surface snow at Svalbard

2021 ◽  
Vol 21 (16) ◽  
pp. 12479-12493
Author(s):  
Michele Bertò ◽  
David Cappelletti ◽  
Elena Barbaro ◽  
Cristiano Varin ◽  
Jean-Charles Gallet ◽  
...  
Keyword(s):  
Black Carbon ◽  
Mass Concentration ◽  
Multiple Linear Regression Model ◽  
The Arctic ◽  
Snow Layer ◽  
Physico Chemical ◽  
Surface Snow ◽  
Carbon Mass ◽  
Precipitation Events ◽  
Observation Period

Abstract. Black carbon (BC) is a significant forcing agent in the Arctic, but substantial uncertainty remains to quantify its climate effects due to the complexity of the different mechanisms involved, in particular related to processes in the snowpack after deposition. In this study, we provide detailed and unique information on the evolution and variability in BC content in the upper surface snow layer during the spring period in Svalbard (Ny-Ålesund). A total of two different snow-sampling strategies were adopted during spring 2014 (from 1 April to 24 June) and during a specific period in 2015 (28 April to 1 May), providing the refractory BC (rBC) mass concentration variability on a seasonal variability with a daily resolution (hereafter seasonal/daily) and daily variability with an hourly sampling resolution (hereafter daily/hourly) timescales. The present work aims to identify which atmospheric variables could interact with and modify the mass concentration of BC in the upper snowpack, which is the snow layer where BC particles affects the snow albedo. Atmospheric, meteorological and snow-related physico-chemical parameters were considered in a multiple linear regression model to identify the factors that could explain the variations in BC mass concentrations during the observation period. Precipitation events were the main drivers of the BC variability during the seasonal experiment; however, in the high-resolution sampling, a negative association has been found. Snow metamorphism and the activation of local sources (Ny-Ålesund was a coal mine settlement) during the snowmelt periods appeared to play a non-negligible role. The statistical analysis suggests that the BC content in the snow is not directly associated to the atmospheric BC load.

scholarly journals Variability of Black Carbon mass concentration in surface snow at Svalbard

2021 ◽  
Author(s):  
Michele Bertò ◽  
David Cappelletti ◽  
Elena Barbaro ◽  
Cristiano Varin ◽  
Jean-Charles Gallet ◽  
...  
Keyword(s):  
Black Carbon ◽  
Mass Concentration ◽  
The Arctic ◽  
Sampling Strategies ◽  
Snow Layer ◽  
Physico Chemical ◽  
Surface Snow ◽  
Carbon Mass ◽  
Precipitation Events ◽  
Substantial Uncertainty

Abstract. Black Carbon (BC) is a significant forcing agent in the Arctic, but substantial uncertainty remains to quantify its climate effects due to the complexity of the different mechanisms involved, in particular related to processes in the snow-pack after deposition. In this study, we provide detailed and unique information on the evolution and variability of BC content in the upper surface snow layer during the spring period in Svalbard (Ny-Ålesund). Two different snow-sampling strategies were adopted during spring 2014 and 2015, providing the refractory BC (rBC) mass concentration variability on a seasonal/daily and daily/hourly time scales. The present work aims to identify which atmospheric variables could interact and modify the mass concentration of BC in the upper snowpack, the snow layer which BC particles affects the snow albedo. Despite the low BC mass concentrations, a relatively high daily variability was observed. Atmospheric, meteorological, and snow-related physico-chemical parameters were considered in a multiple statistical model to separate the factors determining observations. Precipitation events were the main drivers of the BC variability. Snow metamorphism and activation of local sources during the snow melting periods appeared to play a non-negligible role (wind resuspension in specific Arctic areas where coal mines were present). The BC content in the snow resulted in being statistically decoupled from the atmospheric BC load.

Characteristics of aerosol black carbon mass concentration over a high altitude location in the Central Himalayas from multi-year measurements

2010 ◽  
Vol 96 (4) ◽  
pp. 510-521 ◽  
Author(s):  
U.C. Dumka ◽  
K. Krishna Moorthy ◽  
Rajesh Kumar ◽  
P. Hegde ◽  
Ram Sagar ◽  
...  
Keyword(s):  
High Altitude ◽  
Black Carbon ◽  
Mass Concentration ◽  
Central Himalayas ◽  
Carbon Mass

Variation in black carbon mass concentration over an urban site in the eastern coastal plains of the Indian sub-continent

2013 ◽  
Vol 117 (1-2) ◽  
pp. 133-147 ◽  
Author(s):  
Parth S. Mahapatra ◽  
Sipra Panda ◽  
Namrata Das ◽  
Satyajit Rath ◽  
Trupti Das
Keyword(s):  
Black Carbon ◽  
Mass Concentration ◽  
Urban Site ◽  
Coastal Plains ◽  
Carbon Mass

scholarly journals Mass concentration and origin of black carbon in spring snow on glaciers in the Alaska Range

Polar Science ◽  
2020 ◽  
pp. 100572
Author(s):  
Keiko Konya ◽  
Masahiro Yamaguchi ◽  
Masayuki Takigawa ◽  
Takuma Miyakawa ◽  
Shad O'Neel
Keyword(s):  
Black Carbon ◽  
Mass Concentration ◽  
Alaska Range
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