Zobrazeno 1 - 10
of 5 161
pro vyhledávání: '"A. J. McDonald"'
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 5765-5784 (2024)
The use of depolarization lidar to measure atmospheric volume depolarization ratio (VDR) is a common technique to classify cloud phase (liquid or ice). Previous work using a machine learning framework, applied to peak properties derived from co-polar
Externí odkaz:
https://doaj.org/article/ad304abe7f534845a6a9e19e94d28853
Autor:
Y. A. Bhatti, L. E. Revell, A. J. Schuddeboom, A. J. McDonald, A. T. Archibald, J. Williams, A. U. Venugopal, C. Hardacre, E. Behrens
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 15181-15196 (2023)
The biogeochemical formation of dimethyl sulfide (DMS) from the Southern Ocean is complex, dynamic, and driven by physical, chemical, and biological processes. Such processes, produced by marine biogenic activity, are the dominant source of sulfate a
Externí odkaz:
https://doaj.org/article/f578a833ec1b454fbd8b4fad94610278
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 523-549 (2023)
Uncertainty in cloud feedbacks in climate models is a major limitation in projections of future climate. Therefore, evaluation and improvement of cloud simulation are essential to ensure the accuracy of climate models. We analyse cloud biases and clo
Externí odkaz:
https://doaj.org/article/0eaa1e0835794e0f8d6d82c1614db736
Autor:
A. R. Aves, L. E. Revell, S. Gaw, H. Ruffell, A. Schuddeboom, N. E. Wotherspoon, M. LaRue, A. J. McDonald
Publikováno v:
The Cryosphere, Vol 16, Pp 2127-2145 (2022)
In recent years, airborne microplastics have been identified in a range of remote environments. However, data throughout the Southern Hemisphere, in particular Antarctica, are largely absent to date. We collected snow samples from 19 sites across the
Externí odkaz:
https://doaj.org/article/d7e052735aca4790b463571b417ab4f6
Autor:
A. J. Schuddeboom, A. J. McDonald
Publikováno v:
Earth and Space Science, Vol 10, Iss 1, Pp n/a-n/a (2023)
Abstract Clustering algorithms are commonly used for inspecting the behavior of clouds in both model and satellite data sets. Often overlooked in cluster analysis is the variability that occurs within any clusters generated. This is particularly impo
Externí odkaz:
https://doaj.org/article/6fafa3b5a66c484fa1de9e850c90e361
Autor:
E. R. Dale, S. Kremser, J. S. Tradowsky, G. E. Bodeker, L. J. Bird, G. Olivares, G. Coulson, E. Somervell, W. Pattinson, J. Barte, J.-N. Schmidt, N. Abrahim, A. J. McDonald, P. Kuma
Publikováno v:
Earth System Science Data, Vol 13, Pp 2053-2075 (2021)
MAPM (Mapping Air Pollution eMissions) is a project whose goal is to develop a method to infer airborne particulate matter (PM) emissions maps from in situ PM concentration measurements. In support of MAPM, a winter field campaign was conducted in Ne
Externí odkaz:
https://doaj.org/article/f1edb347b4ac4424b30782ab6e84d0c7
Publikováno v:
Geoscientific Model Development, Vol 14, Pp 43-72 (2021)
Automatic lidars and ceilometers (ALCs) provide valuable information on cloud and aerosols but have not been systematically used in the evaluation of general circulation models (GCMs) and numerical weather prediction (NWP) models. Obstacles associate
Externí odkaz:
https://doaj.org/article/97a77f47bd164085969b006084e5495e
Autor:
P. Kuma, A. J. McDonald, O. Morgenstern, S. P. Alexander, J. J. Cassano, S. Garrett, J. Halla, S. Hartery, M. J. Harvey, S. Parsons, G. Plank, V. Varma, J. Williams
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 6607-6630 (2020)
Southern Ocean (SO) shortwave (SW) radiation biases are a common problem in contemporary general circulation models (GCMs), with most models exhibiting a tendency to absorb too much incoming SW radiation. These biases have been attributed to deficien
Externí odkaz:
https://doaj.org/article/66323d67cf5c49d985a945f2b86e870c
Autor:
L. E. Revell, S. Kremser, S. Hartery, M. Harvey, J. P. Mulcahy, J. Williams, O. Morgenstern, A. J. McDonald, V. Varma, L. Bird, A. Schuddeboom
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 15447-15466 (2019)
With low concentrations of tropospheric aerosol, the Southern Ocean offers a “natural laboratory” for studies of aerosol–cloud interactions. Aerosols over the Southern Ocean are produced from biogenic activity in the ocean, which generates sulf
Externí odkaz:
https://doaj.org/article/3ff72d43077b44b290c3b77157aa1022
Publikováno v:
The Cryosphere, Vol 11, Iss 1, Pp 267-280 (2017)
We investigate the impacts of strong wind events on the sea ice concentration within the Ross Sea polynya (RSP), which may have consequences on sea ice formation. Bootstrap sea ice concentration (SIC) measurements derived from satellite SSM/I brightn
Externí odkaz:
https://doaj.org/article/a513e234c67748e0b7ae28fd8f0c2e1f