Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/6032
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Russell, A | - |
dc.contributor.author | Mcgregor, GR | - |
dc.contributor.author | Marshall, GJ | - |
dc.date.accessioned | 2011-12-02T09:55:26Z | - |
dc.date.available | 2011-12-02T09:55:26Z | - |
dc.date.issued | 2004 | - |
dc.identifier.citation | Tellus. Series A: Dynamic Meteorology and Oceanography, 56(5): 501 - 513, Oct 2004 | en_US |
dc.identifier.issn | 0280-6495 | - |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/6032 | - |
dc.description | Copyright @ 2004 Wiley-Blackwell | en_US |
dc.description.abstract | The variability of size and source of significant precipitation events were studied at an Antarctic ice core drilling site: Dolleman Island (DI), located on the eastern coast of the Antarctic Peninsula. Significant precipitation events that occur at DI were temporally located in the European Centre for Medium-Range Weather Forecasting (ECMWF) reanalysis data set, ERA-40. The annual and summer precipitation totals from ERA-40 at DI both show significant increases over the reanalysis period. Three-dimensional backwards air parcel trajectories were then run for 5 d using the ECMWF ERA-15 wind fields. Cluster analyses were performed on two sets of these backwards trajectories: all days in the range 1979–1992 (the climatological time-scale) and a subset of days when a significant precipitation event occurred. The principal air mass sources and delivery mechanisms were found to be the Weddell Sea via lee cyclogenesis, the South Atlantic when there was a weak circumpolar trough (CPT) and the South Pacific when the CPT was deep. The occurrence of precipitation bearing air masses arriving via a strong CPT was found to have a significant correlation with the southern annular mode (SAM); however, the arrival of air masses from the same region over the climatological time-scale showed no such correlation. Despite the dominance in both groups of back trajectories of the westerly circulation around Antarctica, some other key patterns were identified. Most notably there was a higher frequency of lee cyclogenesis events in the significant precipitation trajectories compared to the climatological time-scale. There was also a tendency for precipitation trajectories to come from more northerly latitudes, mostly from 50–70°S. The El Niño Southern Oscillation (ENSO) was found to have a strong influence on the mechanism by which the precipitation was delivered; the frequency of occurrence of precipitation from the east (west) of DI increased during El Niño (La Niña) events. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Wiley-Blackwell | en_US |
dc.subject | Antarctic peninsula | en_US |
dc.subject | ECMWF re-analysis | en_US |
dc.subject | Backwards air trajectories | en_US |
dc.subject | Precipitation | en_US |
dc.title | An examination of the precipitation delivery mechanisms for Dolleman Island, eastern Antarctic Peninsula | en_US |
dc.type | Research Paper | en_US |
dc.identifier.doi | http://dx.doi.org/10.1111/j.1600-0870.2004.00081.x | - |
pubs.organisational-data | /Brunel | - |
pubs.organisational-data | /Brunel/Brunel (Active) | - |
pubs.organisational-data | /Brunel/Brunel (Active)/Research Centres | - |
Appears in Collections: | Environment Institute for the Environment |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Russell_et_al_2004_finalsubmitted.pdf | 5.2 MB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.