Zobrazeno 1 - 10
of 4 109
pro vyhledávání: '"P. A. Alpert"'
Autor:
B. Testa, L. Durdina, P. A. Alpert, F. Mahrt, C. H. Dreimol, J. Edebeli, C. Spirig, Z. C. J. Decker, J. Anet, Z. A. Kanji
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 4537-4567 (2024)
Ice-nucleating particles catalyze ice formation in clouds, affecting climate through radiative forcing from aerosol–cloud interactions. Aviation directly emits particles into the upper troposphere where ice formation conditions are favorable. Previ
Externí odkaz:
https://doaj.org/article/fedeb223e9e34d9fa59079b0eefe82dc
Autor:
Fitzgerald, Ryan P., Alpert, Bradley, Bergeron, Denis E., Carlson, Max, Essex, Richard, Jollota, Sean, Morgan, Kelsey, Muramoto, Shin, Nour, Svetlana, O`Neil, Galen, Schmidt, Daniel R., Shaw, Gordon, Swetz, Daniel, Verkouteren, R. Michael
We demonstrate a method for radionuclide assay that is spectroscopic with 100 % counting efficiency for alpha decay. Advancing both cryogenic decay energy spectrometry (DES) and drop-on-demand inkjet metrology, a solution of Am-241 was assayed for ma
Externí odkaz:
http://arxiv.org/abs/2411.02565
Autor:
J. Dou, P. A. Alpert, P. Corral Arroyo, B. Luo, F. Schneider, J. Xto, T. Huthwelker, C. N. Borca, K. D. Henzler, J. Raabe, B. Watts, H. Herrmann, T. Peter, M. Ammann, U. K. Krieger
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 315-338 (2021)
Iron(III) carboxylate photochemistry plays an important role in aerosol aging, especially in the lower troposphere. These complexes can absorb light over a broad wavelength range, inducing the reduction of iron(III) and the oxidation of carboxylate l
Externí odkaz:
https://doaj.org/article/9848bcbf5ed241b8b948829e1b4939d0
Autor:
Ebel, Denton S., Gemma, Marina E., Alpert, Samuel P., Bayron, Jasmine, Lobo, Ana H., Weisberg, Michael K.
Abundances, apparent sizes, and individual chemical compositions of chondrules, refractory inclusions, other objects and surrounding matrix have been determined for Semarkona (LL3.00) and Renazzo (CR2) using consistent methods and criteria on x-ray e
Externí odkaz:
http://arxiv.org/abs/2407.05199
Autor:
J.-D. Förster, C. Gurk, M. Lamneck, H. Tong, F. Ditas, S. S. Steimer, P. A. Alpert, M. Ammann, J. Raabe, M. Weigand, B. Watts, U. Pöschl, M. O. Andreae, C. Pöhlker
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 3717-3729 (2020)
The dynamic processing of aerosols in the atmosphere is difficult to mimic under laboratory conditions, particularly on a single-particle level with high spatial and chemical resolution. Our new microreactor system for X-ray microscopy facilitates ob
Externí odkaz:
https://doaj.org/article/a58f349c0c0b4eafb0650383ef111fca
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 10817-10828 (2019)
Atmospheric aerosol particles can contain light-absorbing organic compounds, also referred to as brown carbon (BrC). The ocean surface and sea spray aerosol particles can also contain light-absorbing organic species referred to as chromophoric dissol
Externí odkaz:
https://doaj.org/article/0277af731df142ab8cdda74cd2aea600
Autor:
R. C. Moffet, R. E. O'Brien, P. A. Alpert, S. T. Kelly, D. Q. Pham, M. K. Gilles, D. A. Knopf, A. Laskin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 14515-14525 (2016)
Aerosol absorption is strongly dependent on the internal heterogeneity (mixing state) and morphology of individual particles containing black carbon (BC) and other non-absorbing species. Here, we examine an extensive microscopic data set collected
Externí odkaz:
https://doaj.org/article/fd15da51d8714e3a918833bba524d116
Autor:
P. A. Alpert, D. A. Knopf
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 2083-2107 (2016)
Immersion freezing is an important ice nucleation pathway involved in the formation of cirrus and mixed-phase clouds. Laboratory immersion freezing experiments are necessary to determine the range in temperature, T, and relative humidity, RH, at w
Externí odkaz:
https://doaj.org/article/7fac79607eb3490db70bddf707e62dd7
In recent years, video conferencing (VC) popularity has skyrocketed for a wide range of activities. As a result, the number of VC users surged sharply. The sharp increase in VC usage has been accompanied by various newly emerging privacy and security
Externí odkaz:
http://arxiv.org/abs/2303.02052
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 13, Pp 6603-6622 (2013)
Immersion freezing of water and aqueous (NH4)2SO4 droplets containing leonardite (LEO) and Pahokee peat (PP) serving as surrogates for humic-like substances (HULIS) has been investigated. Organic aerosol containing HULIS are ubiquitous in the atmosph
Externí odkaz:
https://doaj.org/article/6fc24abacc8c4254a46d78ffa9390aa5