scholarly journals Sensitivity of global-scale climate change attribution results to inclusion of fossil fuel black carbon aerosol

2005 ◽  
Vol 32 (14) ◽  
pp. n/a-n/a ◽  
Author(s):  
Gareth S. Jones ◽  
Andy Jones ◽  
David L. Roberts ◽  
Peter A. Stott ◽  
Keith D. Williams
Keyword(s):  
Climate Change ◽  
Black Carbon ◽  
Fossil Fuel ◽  
Global Scale ◽  
Black Carbon Aerosol

scholarly journals Mangrove blue carbon strategies for climate change mitigation are most effective at the national scale

2018 ◽  
Vol 14 (10) ◽  
pp. 20180251 ◽  
Author(s):  
Pierre Taillardat ◽  
Daniel A. Friess ◽  
Massimo Lupascu
Keyword(s):  
Climate Change ◽  
Climate Change Mitigation ◽  
Fossil Fuel ◽  
Global Scale ◽  
Blue Carbon ◽  
National Scale ◽  
Nationally Determined Contributions ◽  
Natural Carbon ◽  
Change Mitigation ◽  
Fossil Fuel Emissions

Carbon fixed by vegetated coastal ecosystems (blue carbon) can mitigate anthropogenic CO 2 emissions, though its effectiveness differs with the spatial scale of interest. A literature review compiling carbon sequestration rates within key ecosystems confirms that blue carbon ecosystems are the most efficient natural carbon sinks at the plot scale, though some overlooked biogeochemical processes may lead to overestimation. Moreover, the limited spatial extent of coastal habitats minimizes their potential at the global scale, only buffering 0.42% of the global fossil fuel carbon emissions in 2014. Still, blue carbon plays a role for countries with moderate fossil fuel emissions and extensive coastlines. In 2014, mangroves mitigated greater than 1% of national fossil fuel emissions for countries such as Bangladesh, Colombia and Nigeria. Considering that the Paris Agreement is based on nationally determined contributions, we propose that mangrove blue carbon may contribute to climate change mitigation at this scale in some instances alongside other blue carbon ecosystems.

scholarly journals Source apportionment of black carbon aerosols from light absorption observation and source-oriented modeling: an implication in a coastal city in China

2020 ◽  
Vol 20 (22) ◽  
pp. 14419-14435
Author(s):  
Junjun Deng ◽  
Hao Guo ◽  
Hongliang Zhang ◽  
Jialei Zhu ◽  
Xin Wang ◽  
...  
Keyword(s):  
Climate Change ◽  
Black Carbon ◽  
Source Apportionment ◽  
Biomass Burning ◽  
Light Absorption ◽  
Fossil Fuel ◽  
Central China ◽  
Fossil Fuel Combustion ◽  
East Central ◽  
Coastal City

Abstract. Black carbon (BC) is the most important light-absorbing aerosol in the atmosphere. However, sources of atmospheric BC aerosols are largely uncertain, making it difficult to assess its influence on radiative forcing and climate change. In this study, year-round light-absorption observations were conducted during 2014 using an aethalometer in Xiamen, a coastal city in Southeast China. Source apportionment of BC was performed and temporal variations in BC sources were characterized based on both light absorption measurements and a source-oriented air quality model. The annual average concentrations of BC from fossil fuel (BCff) and biomass burning (BCbb) by the aethalometer method were 2932 ± 1444 ng m−3 and 1340 ± 542 ng m−3, contributing 66.7 % and 33.3 % to total BC, respectively. A sensitivity analysis was performed with different absorption Ångström exponent (AAE) values of fossil fuel combustion (αff) and biomass burning (αbb), suggesting that the aethalometer method was more sensitive to changes in αbb than αff. BCbb contribution exhibited a clear diurnal cycle, with the highest level (37.9 %) in the evening rush hour and a seasonal pattern with the maximum (39.9 %) in winter. Conditional probability function (CPF) analysis revealed the large biomass-burning contributions were accompanied by east-northeasterly and northerly winds. Backward trajectory indicated that air masses from North and East–Central China were associated with larger biomass-burning contributions. Potential source contribution function (PSCF) and concentration-weighted trajectory (CWT) suggested that North and East–Central China and Southeast Asia were potential sources of both BCff and BCbb. The source-oriented modeling results showed that transportation, residential and open biomass burning accounting for 45.3 %, 30.1 % and 17.6 % were the major BC sources. Among the three fuel catalogs, liquid fossil fuel (46.5 %) was the largest source, followed by biomass burning (32.6 %) and coal combustion (20.9 %). Source contributions of fossil fuel combustion and biomass burning identified by the source-oriented model were 67.4 % and 32.6 %, respectively, close to those obtained by the aethalometer method. The findings provide solid support for controlling fossil fuel sources to limit the impacts of BC on climate change and environmental degradation in the relatively clean region in China.

Investigation on semi-direct and indirect climate effects of fossil fuel black carbon aerosol over China

2013 ◽  
Vol 114 (3-4) ◽  
pp. 651-672 ◽  
Author(s):  
Bingliang Zhuang ◽  
Qian Liu ◽  
Tijian Wang ◽  
Changqin Yin ◽  
Shu Li ◽  
...  
Keyword(s):  
Black Carbon ◽  
Fossil Fuel ◽  
Climate Effects ◽  
Black Carbon Aerosol

Investigation on the direct radiative effect of fossil fuel black-carbon aerosol over China

2010 ◽  
Vol 104 (3-4) ◽  
pp. 301-312 ◽  
Author(s):  
Bingliang Zhuang ◽  
Fei Jiang ◽  
Tijian Wang ◽  
Shu Li ◽  
Bin Zhu
Keyword(s):  
Black Carbon ◽  
Fossil Fuel ◽  
Radiative Effect ◽  
Black Carbon Aerosol

scholarly journals Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
K. D. Lamb ◽  
H. Matsui ◽  
J. M. Katich ◽  
A. E. Perring ◽  
J. R. Spackman ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Black Carbon ◽  
Fossil Fuel ◽  
Global Scale ◽  
Aerosol Model ◽  
Carbon Particles ◽  
Source Regions ◽  
Fossil Fuel Burning ◽  
Light Absorber ◽  
The Pacific

AbstractAnthropogenic iron oxide aerosols (FeOx) have been identified as a climatically significant atmospheric light absorber, and as a contributor of free iron to the oceans. Here we provide global-scale constraints on their atmospheric abundance with measurements over the remote Pacific and Atlantic Oceans from aircraft campaigns spanning 10 years. We find FeOx-like aerosols are transported far from source regions with similar efficiency as black carbon particles. Strong contrast in concentrations was observed between the Northern and Southern Hemisphere Pacific. We provide observational constraints in remote regions on the ambient ratios of FeOx relative to BC from fossil fuel burning. Comparison with a global aerosol model tuned to recent observations in East-Asian source regions confirm an upward revision of emissions based on model/observation comparison over the Pacific receptor region. We find that anthropogenic FeOx-like particles generate global-scale shortwave atmospheric heating 0.3–26% of that of black carbon in remote regions where concentrations of both aerosols are very low.

scholarly journals Source apportionment of black carbon aerosols from light absorption observation and source-oriented modeling: An implication in a coastal city in China

2020 ◽  
Author(s):  
Junjun Deng ◽  
Hao Guo ◽  
Hongliang Zhang ◽  
Jialei Zhu ◽  
Xin Wang ◽  
...  
Keyword(s):  
Climate Change ◽  
Black Carbon ◽  
Source Apportionment ◽  
Biomass Burning ◽  
Light Absorption ◽  
Fossil Fuel ◽  
Central China ◽  
East Central ◽  
Coastal City ◽  
Source Contributions

Abstract. Black carbon (BC) is the most important light absorbing aerosol in the atmosphere. However, sources of atmospheric BC aerosols are largely uncertain, making it difficult to assess its influence on radiative forcing and climate change. In this study, year-round light-absorption observations were conducted during 2014 using an aethalometer in Xiamen, a coastal city in southeast China. Source apportionment of BC was performed and temporal variations in BC sources were characterized based on both light absorption measurements and a source-oriented air quality model. The annual average concentrations of BC from fossil fuel (BCff) and biomass burning (BCbb) were 2932 ± 1444 ng m−3 and 1340 ± 542 ng m−3, contributing 66.7 % and 33.3 % to total BC, respectively. BCbb contribution exhibited clear diurnal cycle with the highest level (37.9 %) in the evening rush hour and seasonal pattern with the maximum (39.9 %) in winter. Conditional probability function (CPF) analysis revealed the large biomass burning contributions were accompanied by east-northeasterly and northerly winds. Backward trajectory indicated that air masses from north and east-central China were associated with larger biomass burning contributions. Potential source contribution function (PSCF) and concentration-weighted trajectory (CWT) suggested that north and east-central China and Southeast Asia were potential sources for both BCff and BCbb. The source-oriented modeling results showed that transportation, residential and open biomass burning accounting for 45.3 %, 30.1 % and 17.6 % were the major BC sources. Among the three fuel catalogs, liquid fossil fuel (46.5 %) was the largest source, followed by biomass burning (32.6 %) and coal combustion (20.9 %). Source contributions of biomass burning and fossil fuel combustion identified by the source-oriented model and observation-based method were in good agreement. The source-oriented model also captured the majority of seasonal variations in source contributions. The findings provide solid supports for controlling fossil fuel sources to limit the impacts of BC on climate change and environmental degradation in the relatively clean region in China.

scholarly journals A method to dynamically constrain black carbon aerosol sources with online monitored potassium

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Huang Zheng ◽  
Shaofei Kong ◽  
Nan Chen ◽  
Zewei Fan ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Black Carbon ◽  
Source Identification ◽  
Fossil Fuel ◽  
Pearson Correlation ◽  
Pearson Correlation Coefficient ◽  
Fossil Fuel Combustion ◽  
Wood Burning ◽  
Study Results ◽  
Black Carbon Aerosol ◽  
Aerosol Sources

AbstractThe result of Aethalometer model to black carbon (BC) source apportionment is highly determined by the absorption Ångström exponent (α) of aerosols from fossil fuel combustion (αff) and wood burning (αwb). A method using hourly measured potassium to calculate the αff and αwb values was developed in this study. Results showed that the optimal αff and αwb were 1.09 and 1.79 for the whole dataset. The optimal α values in the diurnal resolution were also calculated with αff and αwb varied in 1.02 –1.19 and 1.71–1.90, respectively. Using the dynamic α values, the Pearson correlation coefficient between BC and potassium from wood burning substantially improved compared to the results derived from the fixed α values. The method developed in this study is expected to provide more reasonable BC source identification results, which are helpful for air quality, climate, and human health modeling studies.

Sign in / Sign up

Export Citation Format

Share Document