Zobrazeno 1 - 10
of 1 082
pro vyhledávání: '"A. S. Mahajan"'
Publikováno v:
Biogeosciences, Vol 21, Pp 4439-4452 (2024)
Dimethyl sulfide (DMS) is a naturally emitted trace gas that can affect the Earth's radiative budget by changing cloud albedo. Most atmospheric models that represent aerosol processes depend on regional or global distributions of seawater DMS concent
Externí odkaz:
https://doaj.org/article/0d031575bdc549b18dde9ac90e5815a3
Autor:
S. D. Joge, A. S. Mahajan, S. Hulswar, C. A. Marandino, M. Galí, T. G. Bell, M. Yang, R. Simó
Publikováno v:
Biogeosciences, Vol 21, Pp 4453-4467 (2024)
Dimethyl sulfide (DMS) contributes to cloud condensation nuclei (CCN) formation in the marine environment. DMS is ventilated from the ocean to the atmosphere, and, in most models, this flux is calculated using seawater DMS concentrations and a sea–
Externí odkaz:
https://doaj.org/article/ffa39879cf3c45d6a55f0464fb1e48ba
Autor:
G. Manville, T. G. Bell, J. P. Mulcahy, R. Simó, M. Galí, A. S. Mahajan, S. Hulswar, P. R. Halloran
Publikováno v:
Biogeosciences, Vol 20, Pp 1813-1828 (2023)
Dimethylsulfide (DMS) emitted from the ocean makes a significant global contribution to natural marine aerosol and cloud condensation nuclei and, therefore, our planet's climate. Oceanic DMS concentrations show large spatiotemporal variability, but o
Externí odkaz:
https://doaj.org/article/a4aa99890358422caad28ad1894bbd95
Autor:
S. Hulswar, R. Simó, M. Galí, T. G. Bell, A. Lana, S. Inamdar, P. R. Halloran, G. Manville, A. S. Mahajan
Publikováno v:
Earth System Science Data, Vol 14, Pp 2963-2987 (2022)
This paper presents an updated estimation of the bottom-up global surface seawater dimethyl sulfide (DMS) climatology. This update, called DMS-Rev3, is the third of its kind and includes five significant changes from the last climatology, L11 (Lana e
Externí odkaz:
https://doaj.org/article/a7590a1db6f045268fbd1f4a682b4d63
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 6625-6676 (2022)
The Indian Ocean is coupled to atmospheric dynamics and chemical composition via several unique mechanisms, such as the seasonally varying monsoon circulation. During the winter monsoon season, high pollution levels are regularly observed over the en
Externí odkaz:
https://doaj.org/article/0169225acd654f8bbce74afbbf4bdf35
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 11829-11842 (2021)
Iodine plays a vital role in oxidation chemistry over Antarctica, with past observations showing highly elevated levels of iodine oxide (IO) leading to severe depletion of boundary layer ozone in West Antarctica. Here, we present MAX-DOAS-based (mult
Externí odkaz:
https://doaj.org/article/30177d8ae99a4fcc92ce99bd8b4fc12b
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 8437-8454 (2021)
Recent observations have shown the ubiquitous presence of iodine oxide (IO) in the Indian Ocean marine boundary layer (MBL). In this study, we use the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem version 3.7.1), including h
Externí odkaz:
https://doaj.org/article/2e007e2324fc43a891a32cbe9b9cfbb5
Autor:
S. Inamdar, L. Tinel, R. Chance, L. J. Carpenter, P. Sabu, R. Chacko, S. C. Tripathy, A. U. Kerkar, A. K. Sinha, P. V. Bhaskar, A. Sarkar, R. Roy, T. Sherwen, C. Cuevas, A. Saiz-Lopez, K. Ram, A. S. Mahajan
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 12093-12114 (2020)
Iodine chemistry has noteworthy impacts on the oxidising capacity of the marine boundary layer (MBL) through the depletion of ozone (O3) and changes to HOx (OH∕HO2) and NOx (NO∕NO2) ratios. Hitherto, studies have shown that the reaction of atmosp
Externí odkaz:
https://doaj.org/article/b235d0b10f20451c821e46082f5af7ca
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 15593-15604 (2016)
Little attention has so far been paid to the nighttime atmospheric chemistry of iodine species. Current atmospheric models predict a buildup of HOI and I2 during the night that leads to a spike of IO at sunrise, which is not observed by measuremen
Externí odkaz:
https://doaj.org/article/5b832604cc21438ea66dd32f65cb2aea
Autor:
T. Sherwen, J. A. Schmidt, M. J. Evans, L. J. Carpenter, K. Großmann, S. D. Eastham, D. J. Jacob, B. Dix, T. K. Koenig, R. Sinreich, I. Ortega, R. Volkamer, A. Saiz-Lopez, C. Prados-Roman, A. S. Mahajan, C. Ordóñez
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 12239-12271 (2016)
We present a simulation of the global present-day composition of the troposphere which includes the chemistry of halogens (Cl, Br, I). Building on previous work within the GEOS-Chem model we include emissions of inorganic iodine from the oceans, a
Externí odkaz:
https://doaj.org/article/6dd25814258f4b24b10455a940f52dec