Zobrazeno 1 - 10
of 101
pro vyhledávání: '"L.-W. A. Chen"'
Autor:
J. G. Watson, J. Cao, L.-W. A. Chen, Q. Wang, J. Tian, X. Wang, S. Gronstal, S. S. H. Ho, A. C. Watts, J. C. Chow
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 14173-14193 (2019)
Peat fuels representing four biomes of boreal (western Russia and Siberia), temperate (northern Alaska, USA), subtropical (northern and southern Florida, USA), and tropical (Borneo, Malaysia) regions were burned in a laboratory chamber to determine g
Externí odkaz:
https://doaj.org/article/8e94bb9f5a4e4640accd04779f56ecc4
Autor:
R. K. Chakrabarty, M. Gyawali, R. L. N. Yatavelli, A. Pandey, A. C. Watts, J. Knue, L.-W. A. Chen, R. R. Pattison, A. Tsibart, V. Samburova, H. Moosmüller
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 3033-3040 (2016)
The surface air warming over the Arctic has been almost twice as much as the global average in recent decades. In this region, unprecedented amounts of smoldering peat fires have been identified as a major emission source of climate-warming agents
Externí odkaz:
https://doaj.org/article/deaf34e7a14949fa8078e18718be9313
Autor:
J. Diab, T. Streibel, F. Cavalli, S. C. Lee, H. Saathoff, A. Mamakos, J. C. Chow, L.-W. A. Chen, J. G. Watson, O. Sippula, R. Zimmermann
Publikováno v:
Atmospheric Measurement Techniques, Vol 8, Iss 8, Pp 3337-3353 (2015)
Source apportionment and characterization of primary and secondary aerosols remains a challenging research field. In particular, the organic composition of primary particles and the formation mechanism of secondary organic aerosols (SOAs) warrant fur
Externí odkaz:
https://doaj.org/article/16b773dfd34143b68e116795b2bb5459
Autor:
L.-W. A. Chen, J. C. Chow, X. L. Wang, J. A. Robles, B. J. Sumlin, D. H. Lowenthal, R. Zimmermann, J. G. Watson
Publikováno v:
Atmospheric Measurement Techniques, Vol 8, Iss 1, Pp 451-461 (2015)
A thermal/optical carbon analyzer equipped with seven-wavelength light source/detector (405–980 nm) for monitoring spectral reflectance (R) and transmittance (T) of filter samples allowed "thermal spectral analysis (TSA)" and wavelength (λ)-depend
Externí odkaz:
https://doaj.org/article/73d4c4b001e64fff9064fd590292f84f
Publikováno v:
Atmospheric Chemistry and Physics, Vol 12, Iss 21, Pp 10051-10064 (2012)
This study investigates the causes of elevated PM2.5 episodes and potential exceedences of the US National Ambient Air Quality Standards (NAAQS) in Truckee Meadows, Nevada, an urban valley of the Western US, during winter 2009/2010, an unusually cold
Externí odkaz:
https://doaj.org/article/d4dd6f6e73b842258dd7bb5d04e0cb75
Publikováno v:
Atmospheric Measurement Techniques, Vol 5, Iss 10, Pp 2329-2338 (2012)
Decreasing trends of elemental carbon (EC) have been reported at US Interagency Monitoring of PROtected Visual Environments (IMPROVE) network from 1990 to 2004, consistent with the phase-in of cleaner engines, residential biomass burning technologies
Externí odkaz:
https://doaj.org/article/e62dc75fa37a49b5b0a5847715de1e63
Autor:
M. Gyawali, W. P. Arnott, R. A. Zaveri, C. Song, H. Moosmüller, L. Liu, M. I. Mishchenko, L.-W. A. Chen, M. C. Green, J. G. Watson, J. C. Chow
Publikováno v:
Atmospheric Chemistry and Physics, Vol 12, Iss 5, Pp 2587-2601 (2012)
We present the laboratory and ambient photoacoustic (PA) measurement of aerosol light absorption coefficients at ultraviolet wavelength (i.e., 355 nm) and compare with measurements at 405, 532, 870, and 1047 nm. Simultaneous measurements of aerosol l
Externí odkaz:
https://doaj.org/article/f0aa41bfb099469b8c8cfe760a70e087
Autor:
R. K. Chakrabarty, H. Moosmüller, L.-W. A. Chen, K. Lewis, W. P. Arnott, C. Mazzoleni, M. K. Dubey, C. E. Wold, W. M. Hao, S. M. Kreidenweis
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 13, Pp 6363-6370 (2010)
We report the direct observation of laboratory production of spherical, carbonaceous particles – "tar balls" – from smoldering combustion of two commonly occurring dry mid-latitude fuels. Real-time measurements of spectrally varying absorption Å
Externí odkaz:
https://doaj.org/article/b42378fec77e4b7b9833fad959a64345
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 14, Pp 6617-6625 (2010)
Carbon (C) and nitrogen (N) released from biomass burning have multiple effects on the Earth's biogeochemical cycle, climate change, and ecosystem. These effects depend on the relative abundances of C and N species emitted, which vary with fuel type
Externí odkaz:
https://doaj.org/article/82ffefb84a214dc299d027d6e44570cd
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 12, Pp 5223-5239 (2010)
Field blanks (bQF) and backup filters (quartz-fiber behind quartz-fiber filter; QBQ) have been adopted by US long-term air quality monitoring networks to estimate PM2.5 organic carbon (OC) sampling artifacts. This study documents bQF and QBQ carbon l
Externí odkaz:
https://doaj.org/article/fd51fc89f80549bf9a72740f74f0b3c2