Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Helen N. Webster"'
Autor:
Rachel E. Pelley, David J. Thomson, Helen N. Webster, Michael C. Cooke, Alistair J. Manning, Claire S. Witham, Matthew C. Hort
Publikováno v:
Atmosphere, Vol 12, Iss 12, p 1573 (2021)
We present a Bayesian inversion method for estimating volcanic ash emissions using satellite retrievals of ash column load and an atmospheric dispersion model. An a priori description of the emissions is used based on observations of the rise height
Externí odkaz:
https://doaj.org/article/3dee3478807341638f576b43e34ddab2
Autor:
Natalie J. Harvey, Helen F. Dacre, Helen N. Webster, Isabelle A. Taylor, Sujan Khanal, Roy G. Grainger, Michael C. Cooke
Publikováno v:
Atmosphere, Vol 11, Iss 10, p 1022 (2020)
Volcanic ash can interact with the earth system on many temporal and spatial scales and is a significant hazard to aircraft. In the event of a volcanic eruption, fast and robust decisions need to be made by aviation authorities about which routes are
Externí odkaz:
https://doaj.org/article/674b54a6487f47468058c090a7126b14
Autor:
Frances M. Beckett, Claire S. Witham, Susan J. Leadbetter, Ric Crocker, Helen N. Webster, Matthew C. Hort, Andrew R. Jones, Benjamin J. Devenish, David J. Thomson
Publikováno v:
Atmosphere, Vol 11, Iss 4, p 352 (2020)
It has been 10 years since the ash cloud from the eruption of Eyjafjallajökull caused unprecedented disruption to air traffic across Europe. During this event, the London Volcanic Ash Advisory Centre (VAAC) provided advice and guidance on the expect
Externí odkaz:
https://doaj.org/article/992c4171da6640b59b1bcf3bde218110
Autor:
Helen N. Webster, Benjamin J. Devenish, Larry G. Mastin, David J. Thomson, Alexa R. Van Eaton
Publikováno v:
Atmosphere, Vol 11, Iss 2, p 200 (2020)
Large explosive eruptions can result in the formation of an umbrella cloud which rapidly expands, spreading ash out radially from the volcano. The lateral spread by the intrusive gravity current dominates the transport of the ash cloud. Hence, to acc
Externí odkaz:
https://doaj.org/article/48a177e0a9044e68b4ddc878f3ad98dc
Autor:
Kate Louise Wilkins, Shona Mackie, Matthew Watson, Helen N. Webster, David J. Thomson, Helen F. Dacre
Publikováno v:
Annals of Geophysics, Vol 57, Iss 0 (2015)
During the eruption of Eyjafjallajökull in April and May 2010, the London Volcanic Ash Advisory Centre demonstrated the importance of infrared (IR) satellite imagery for monitoring volcanic ash and validating the Met Office operational model, NAME.
Externí odkaz:
https://doaj.org/article/8bfe47cd93c048e79f3eaeb62782b506
Autor:
Helen N. Webster, David J. Thomson
Publikováno v:
Journal of Geophysical Research: Atmospheres. 127
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c149a4123379991511f919f278195a4
https://doi.org/10.1029/2022jd036469
https://doi.org/10.1029/2022jd036469
Autor:
Nicholas Cowan, Eiko Nemitz, John T. Walker, David Fowler, John J. Finnigan, Helen N. Webster, Peter Levy, Marsailidh Twigg, Sim Y. Tang, Nuria Bachiller-Jareno, Philip Trembath, Robert P. Kinnersley, Christine F. Braban
This review is a summary of the most up-to-date knowledge regarding assessment of atmospheric deposition of reactive nitrogen (Nr) pollutants across complex terrain in the UK. Progress in the understanding of the mechanisms and quantification of Nr d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa14ec89c97e042eb6a0497e76a75753
https://doi.org/10.1039/D2EA00012A
https://doi.org/10.1039/D2EA00012A
Autor:
Natalie J. Harvey, Helen F. Dacre, Cameron Saint, Andrew T. Prata, Helen N. Webster, Roy G. Grainger
Due to the remote location of many volcanoes, there is substantial uncertainty about the timing, amount and vertical distribution of volcanic ash released when they erupt. One approach to determine these properties is to combine prior estimates with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dad2bbe5cc461bc317dcfe5ad97aaee4
https://centaur.reading.ac.uk/106705/1/acp-22-8529-2022.pdf
https://centaur.reading.ac.uk/106705/1/acp-22-8529-2022.pdf
Autor:
Natalie J. Harvey, Helen F. Dacre, Cameron Saint, Andrew Prata, Helen N. Webster, Roy G. Grainger
Due to the remote location of many volcanoes, there is large uncertainty in the timing, amount and vertical distribution of volcanic ash released when they erupt. One approach to determine these properties is to combine prior estimates with satellite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1498a31086e4970689eb426798cd5bd
https://doi.org/10.5194/acp-2021-973
https://doi.org/10.5194/acp-2021-973
Autor:
Isabelle Taylor, Natalie J. Harvey, Helen F. Dacre, Sujan Khanal, Roy G. Grainger, Helen N. Webster, Michael C. Cooke
Publikováno v:
Atmosphere, Vol 11, Iss 1022, p 1022 (2020)
Atmosphere
Volume 11
Issue 10
Atmosphere
Volume 11
Issue 10
Volcanic ash can interact with the earth system on many temporal and spatial scales and is a significant hazard to aircraft. In the event of a volcanic eruption, fast and robust decisions need to be made by aviation authorities about which routes are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8213be2dcfb6418e5791d5ea4b59c5d
https://www.mdpi.com/2073-4433/11/10/1022
https://www.mdpi.com/2073-4433/11/10/1022