Indirect Measurements of the Composition of Ultrafine Particles in the Arctic Late-Winter. Myers, D., C., Lawler, M., J., Mauldin, R., L., Sjostedt, S., Dubey, M., Abbatt, J., & Smith, J., N. Journal of Geophysical Research: Atmospheres, 2021. doi abstract bibtex 2 downloads We present indirect measurements of size-resolved ultrafine particle composition conducted during the Ocean-Atmosphere-Sea Ice-Snowpack (OASIS) Campaign in Utqiagvik, Alaska, during March 2009. This study focuses on measurements of size-resolved particle hygroscopicity and volatility measured over two periods of the campaign. During a period that represents background conditions in this location, particle hygroscopic growth factors (HGF) at 90% relative humidity ranged from 1.45 to 1.51, which combined with volatility measurements suggest a mixture of ∼30% ammoniated sulfates and ∼70% oxidized organics. Two separate regional ultrafine particle growth events were also observed during this campaign. Event 1 coincided with elevated levels of H2SO4 and solar radiation. These particles were highly hygroscopic (HGF = 2.1 for 35 nm particles), but were almost fully volatilized at 160 °C. The air masses associated with both events originated over the Arctic Ocean. Event 1 was influenced by the upper marine boundary layer (200–350 m AGL), while Event 2 spent more time closer to the surface (50–150 m AGL) and over open ocean leads, suggesting marine influence in growth processes. Event 2 particles were slightly less hygroscopic (HGF = 1.94 for 35 nm and 1.67 for 15 nm particles), and similarly volatile. We hypothesize that particles formed during both events contained 60–70% hygroscopic salts by volume, with the balance for Event 1 being sulfates and oxidized organics for Event 2. These observations suggest that primary sea spray may be an important initiator of ultrafine particle formation events in the Arctic late-winter, but a variety of processes may be responsible for condensational growth.
@article{
title = {Indirect Measurements of the Composition of Ultrafine Particles in the Arctic Late-Winter},
type = {article},
year = {2021},
keywords = {OASIS,Utqiagvik,new particle formation,ultrafine aerosol},
volume = {126},
id = {bcf8ca45-cb2a-3eba-bc5d-116f268b8301},
created = {2023-01-31T22:46:14.387Z},
file_attached = {false},
profile_id = {2e2b0bf1-6573-3fd8-8628-55d1dc39fe31},
last_modified = {2023-01-31T22:46:14.387Z},
read = {false},
starred = {false},
authored = {true},
confirmed = {true},
hidden = {false},
source_type = {JOUR},
private_publication = {false},
abstract = {We present indirect measurements of size-resolved ultrafine particle composition conducted during the Ocean-Atmosphere-Sea Ice-Snowpack (OASIS) Campaign in Utqiagvik, Alaska, during March 2009. This study focuses on measurements of size-resolved particle hygroscopicity and volatility measured over two periods of the campaign. During a period that represents background conditions in this location, particle hygroscopic growth factors (HGF) at 90% relative humidity ranged from 1.45 to 1.51, which combined with volatility measurements suggest a mixture of ∼30% ammoniated sulfates and ∼70% oxidized organics. Two separate regional ultrafine particle growth events were also observed during this campaign. Event 1 coincided with elevated levels of H2SO4 and solar radiation. These particles were highly hygroscopic (HGF = 2.1 for 35 nm particles), but were almost fully volatilized at 160 °C. The air masses associated with both events originated over the Arctic Ocean. Event 1 was influenced by the upper marine boundary layer (200–350 m AGL), while Event 2 spent more time closer to the surface (50–150 m AGL) and over open ocean leads, suggesting marine influence in growth processes. Event 2 particles were slightly less hygroscopic (HGF = 1.94 for 35 nm and 1.67 for 15 nm particles), and similarly volatile. We hypothesize that particles formed during both events contained 60–70% hygroscopic salts by volume, with the balance for Event 1 being sulfates and oxidized organics for Event 2. These observations suggest that primary sea spray may be an important initiator of ultrafine particle formation events in the Arctic late-winter, but a variety of processes may be responsible for condensational growth.},
bibtype = {article},
author = {Myers, Deanna C and Lawler, Michael J and Mauldin, Roy L and Sjostedt, Steven and Dubey, Manvendra and Abbatt, Jonathan and Smith, James N},
doi = {10.1029/2021JD035428},
journal = {Journal of Geophysical Research: Atmospheres},
number = {22}
}
Downloads: 2
{"_id":"4xdPZA5sfDbvodRib","bibbaseid":"myers-lawler-mauldin-sjostedt-dubey-abbatt-smith-indirectmeasurementsofthecompositionofultrafineparticlesinthearcticlatewinter-2021","author_short":["Myers, D., C.","Lawler, M., J.","Mauldin, R., L.","Sjostedt, S.","Dubey, M.","Abbatt, J.","Smith, J., N."],"bibdata":{"title":"Indirect Measurements of the Composition of Ultrafine Particles in the Arctic Late-Winter","type":"article","year":"2021","keywords":"OASIS,Utqiagvik,new particle formation,ultrafine aerosol","volume":"126","id":"bcf8ca45-cb2a-3eba-bc5d-116f268b8301","created":"2023-01-31T22:46:14.387Z","file_attached":false,"profile_id":"2e2b0bf1-6573-3fd8-8628-55d1dc39fe31","last_modified":"2023-01-31T22:46:14.387Z","read":false,"starred":false,"authored":"true","confirmed":"true","hidden":false,"source_type":"JOUR","private_publication":false,"abstract":"We present indirect measurements of size-resolved ultrafine particle composition conducted during the Ocean-Atmosphere-Sea Ice-Snowpack (OASIS) Campaign in Utqiagvik, Alaska, during March 2009. This study focuses on measurements of size-resolved particle hygroscopicity and volatility measured over two periods of the campaign. During a period that represents background conditions in this location, particle hygroscopic growth factors (HGF) at 90% relative humidity ranged from 1.45 to 1.51, which combined with volatility measurements suggest a mixture of ∼30% ammoniated sulfates and ∼70% oxidized organics. Two separate regional ultrafine particle growth events were also observed during this campaign. Event 1 coincided with elevated levels of H2SO4 and solar radiation. These particles were highly hygroscopic (HGF = 2.1 for 35 nm particles), but were almost fully volatilized at 160 °C. The air masses associated with both events originated over the Arctic Ocean. Event 1 was influenced by the upper marine boundary layer (200–350 m AGL), while Event 2 spent more time closer to the surface (50–150 m AGL) and over open ocean leads, suggesting marine influence in growth processes. Event 2 particles were slightly less hygroscopic (HGF = 1.94 for 35 nm and 1.67 for 15 nm particles), and similarly volatile. We hypothesize that particles formed during both events contained 60–70% hygroscopic salts by volume, with the balance for Event 1 being sulfates and oxidized organics for Event 2. These observations suggest that primary sea spray may be an important initiator of ultrafine particle formation events in the Arctic late-winter, but a variety of processes may be responsible for condensational growth.","bibtype":"article","author":"Myers, Deanna C and Lawler, Michael J and Mauldin, Roy L and Sjostedt, Steven and Dubey, Manvendra and Abbatt, Jonathan and Smith, James N","doi":"10.1029/2021JD035428","journal":"Journal of Geophysical Research: Atmospheres","number":"22","bibtex":"@article{\n title = {Indirect Measurements of the Composition of Ultrafine Particles in the Arctic Late-Winter},\n type = {article},\n year = {2021},\n keywords = {OASIS,Utqiagvik,new particle formation,ultrafine aerosol},\n volume = {126},\n id = {bcf8ca45-cb2a-3eba-bc5d-116f268b8301},\n created = {2023-01-31T22:46:14.387Z},\n file_attached = {false},\n profile_id = {2e2b0bf1-6573-3fd8-8628-55d1dc39fe31},\n last_modified = {2023-01-31T22:46:14.387Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n source_type = {JOUR},\n private_publication = {false},\n abstract = {We present indirect measurements of size-resolved ultrafine particle composition conducted during the Ocean-Atmosphere-Sea Ice-Snowpack (OASIS) Campaign in Utqiagvik, Alaska, during March 2009. This study focuses on measurements of size-resolved particle hygroscopicity and volatility measured over two periods of the campaign. During a period that represents background conditions in this location, particle hygroscopic growth factors (HGF) at 90% relative humidity ranged from 1.45 to 1.51, which combined with volatility measurements suggest a mixture of ∼30% ammoniated sulfates and ∼70% oxidized organics. Two separate regional ultrafine particle growth events were also observed during this campaign. Event 1 coincided with elevated levels of H2SO4 and solar radiation. These particles were highly hygroscopic (HGF = 2.1 for 35 nm particles), but were almost fully volatilized at 160 °C. The air masses associated with both events originated over the Arctic Ocean. Event 1 was influenced by the upper marine boundary layer (200–350 m AGL), while Event 2 spent more time closer to the surface (50–150 m AGL) and over open ocean leads, suggesting marine influence in growth processes. Event 2 particles were slightly less hygroscopic (HGF = 1.94 for 35 nm and 1.67 for 15 nm particles), and similarly volatile. We hypothesize that particles formed during both events contained 60–70% hygroscopic salts by volume, with the balance for Event 1 being sulfates and oxidized organics for Event 2. These observations suggest that primary sea spray may be an important initiator of ultrafine particle formation events in the Arctic late-winter, but a variety of processes may be responsible for condensational growth.},\n bibtype = {article},\n author = {Myers, Deanna C and Lawler, Michael J and Mauldin, Roy L and Sjostedt, Steven and Dubey, Manvendra and Abbatt, Jonathan and Smith, James N},\n doi = {10.1029/2021JD035428},\n journal = {Journal of Geophysical Research: Atmospheres},\n number = {22}\n}","author_short":["Myers, D., C.","Lawler, M., J.","Mauldin, R., L.","Sjostedt, S.","Dubey, M.","Abbatt, J.","Smith, J., N."],"biburl":"https://bibbase.org/service/mendeley/2e2b0bf1-6573-3fd8-8628-55d1dc39fe31","bibbaseid":"myers-lawler-mauldin-sjostedt-dubey-abbatt-smith-indirectmeasurementsofthecompositionofultrafineparticlesinthearcticlatewinter-2021","role":"author","urls":{},"keyword":["OASIS","Utqiagvik","new particle formation","ultrafine aerosol"],"metadata":{"authorlinks":{}},"downloads":2},"bibtype":"article","biburl":"https://bibbase.org/service/mendeley/2e2b0bf1-6573-3fd8-8628-55d1dc39fe31","dataSources":["WeLWzjCfqFYg2Sxnm","ya2CyA73rpZseyrZ8","oNej9eNrvoGMWEDAF","2252seNhipfTmjEBQ"],"keywords":["oasis","utqiagvik","new particle formation","ultrafine aerosol"],"search_terms":["indirect","measurements","composition","ultrafine","particles","arctic","late","winter","myers","lawler","mauldin","sjostedt","dubey","abbatt","smith"],"title":"Indirect Measurements of the Composition of Ultrafine Particles in the Arctic Late-Winter","year":2021,"downloads":2}