Results 51 to 60 of about 99,075 (290)

Evaluation of OH and HO₂ concentrations and their budgets during photooxidation of 2-methyl-3-butene-2-ol (MBO) in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2018
Several previous field studies have reported unexpectedly large concentrations of hydroxyl and hydroperoxyl radicals (OH and HO2, respectively) in forested environments that could not be explained by the traditional oxidation mechanisms that largely ...
A. Novelli, M. Kaminski, M. Kaminski, M. Rolletter, I.-H. Acir, I.-H. Acir, B. Bohn, H.-P. Dorn, X. Li, X. Li, A. Lutz, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, R. Wegener, F. Holland, A. Hofzumahaus, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +20 more
doaj   +1 more source

Atmospheric River Event Frequency Is the Principal Moisture Driver for Radial Growth of High‐Elevation Southern California, USA Conifers, 1658–2020 CE

International Journal of Climatology, EarlyView.
Conifers growing in high‐elevation alpine environments in the mountains of Southern California, USA, are highly responsive to atmospheric river (AR) events, which typically produce heavy precipitation over 1–3 days. However, it is the frequency of the AR events, not their magnitude nor annual precipitation totals, that most affects the radial growth of
Paul A. Knapp, Avery A. Catherwood, Tyler J. Mitchell   +2 more
wiley   +1 more source

Investigation of the oxidation of methyl vinyl ketone (MVK) by OH radicals in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2018
The photooxidation of methyl vinyl ketone (MVK) was investigated in the atmospheric simulation chamber SAPHIR for conditions at which organic peroxy radicals (RO2) mainly reacted with NO (high NO case) and for conditions at which other reaction ...
H. Fuchs, S. Albrecht, I. Acir, I. Acir, B. Bohn, M. Breitenlechner, H.-P. Dorn, G. I. Gkatzelis, A. Hofzumahaus, F. Holland, M. Kaminski, M. Kaminski, F. N. Keutsch, A. Novelli, D. Reimer, F. Rohrer, R. Tillmann, L. Vereecken, R. Wegener, A. Zaytsev, A. Kiendler-Scharr, A. Wahner   +21 more
doaj   +1 more source

Климатическая изменчивость стратосферно-тропосферных взаимодействий, наблюдаемая в последние десятилетия

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2021
В данной работе показано, как изменялось взаимодействие между тропосферой и стратосферой в последние десятилетия. Также оценено влияние таких явлений, как квазидвухлетнее колебание (КДК) на данное взаимодействие.
Диденко, К.А., Ермакова, Т.С., Погорельцев, А.И., Ракушина, Е.В.   +3 more
doaj   +1 more source

Analysis of the atmospheric distribution, sources, and sinks of oxygenated volatile organic chemicals based on measurements over the Pacific during TRACE-P [PDF]

, 2004
Airborne measurements of a large number of oxygenated volatile organic chemicals (OVOC) were carried out in the Pacific troposphere (0.1 - 12 km) in winter/spring of 2001 (24 February to 10 April).
Avery, MA, Blake, D, Chatfield, RB, Crawford, JH, Czech, E, Evans, MJ, Field, BD, Fried, A, Fuelberg, H, Heikes, B, Jacob, DJ, Sachse, G, Salas, LJ, Sandholm, S, Singh, HB, Talbot, R, Walega, J   +16 more
core  

Large-scale air mass characteristics observed over the remote tropical Pacific Ocean during March-April 1999: Results from PEM-Tropics B field experiment [PDF]

, 2001
Eighteen long-range flights over the Pacific Ocean between 38° S to 20° N and 166° E to 90° W were made by the NASA DC-8 aircraft during the NASA Pacific Exploratory Mission (PEM) Tropics B conducted from March 6 to April 18, 1999. Two lidar systems were
Anderson, BE, Avery, MA, Barrick, JDW, Blake, DR, Brackett, VG, Browell, EV, Brune, WH, Butler, CF, Clayton, MB, Fenn, MA, Ferrare, RA, Fuelberg, HE, Grant, WB, Heikes, BG, Ismail, S, Kooi, SA, Mahoney, MJ, Maloney, JC, Newell, RE, Sachse, GW, Singh, HB, Talbot, RW, Zhu, Y   +22 more
core   +1 more source

Large Proportions of Surface Ozone and Premature Mortality Due to a Stratospheric Intrusion Event in North China

International Journal of Climatology, EarlyView.
This study, by examining a typical stratospheric intrusion event that occurred in North China from 30 to 31 July 2021, found that the event led to a sharp increase in near‐surface ozone concentrations by 23 ppbv within 36 h, accounting for 40% of the total observed ozone levels, with localised peaks exceeding 30 ppbv.
Yinghan Sun, Zhicong Yin, Yijia Zhang
wiley   +1 more source

Clouds, photolysis and regional tropospheric ozone budgets. [PDF]

, 2009
We use a three-dimensional chemical transport model to examine the shortwave radiative effects of clouds on the tropospheric ozone budget. In addition to looking at changes in global concentrations as previous studies have done, we examine changes in ...
Carver, G. D., Pyle, J. A., Savage, N. H., Voulgarakis, A., Wild, Oliver   +4 more
core   +1 more source

Performance Evaluation of the MPAS Model in Simulating Southeast Asian Rainfall Characteristics

International Journal of Climatology, EarlyView.
This study evaluates the performance of the Model for Prediction Across Scales–Atmosphere (MPAS) in reproducing key rainfall characteristics over Southeast Asia (SEA) during 2000–2020, using the MSWEP dataset as reference. MPAS realistically captures the observed meridional rainfall gradient, with higher rainfall in the south and lower in the north, as
Nguyen Thanh Hung, Alugula Boyaj, Srivatsan V. Raghavan, Nguyen Ngoc Son, Bhenjamin Jordan Ona   +4 more
wiley   +1 more source

Investigation of the β-pinene photooxidation by OH in the atmosphere simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2017
Besides isoprene, monoterpenes are the non-methane volatile organic compounds (VOCs) with the highest global emission rates. Due to their high reactivity towards OH, monoterpenes can dominate the radical chemistry of the atmosphere in forested areas ...
M. Kaminski, M. Kaminski, H. Fuchs, I.-H. Acir, I.-H. Acir, B. Bohn, T. Brauers, T. Brauers, H.-P. Dorn, R. Häseler, A. Hofzumahaus, X. Li, X. Li, A. Lutz, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, L. Vereecken, R. Wegener, A. Wahner   +20 more
doaj   +1 more source