The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products
Boundaries between air masses, called frontal zones, have been associated with vegetation boundaries (Bryson, 1966; Hare and Ritchie, 1972). Using gridded climate reanalysis data, we analyze the air masses and frontal zones of North America. The position of the July Arctic front varies significantly...
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Université d'Ottawa / University of Ottawa
2009
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Online Access: | http://hdl.handle.net/10393/19586 https://doi.org/10.20381/ruor-4334 |
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ftunivottawa:oai:ruor.uottawa.ca:10393/19586 2023-05-15T14:33:51+02:00 The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products Ladd, Matthew Jared Gajewski, Konrad 2009 application/pdf http://hdl.handle.net/10393/19586 https://doi.org/10.20381/ruor-4334 en eng Université d'Ottawa / University of Ottawa http://hdl.handle.net/10393/19586 http://dx.doi.org/10.20381/ruor-4334 Arctic front North America reanalysis ERA-40 NCEP air mass Thesis 2009 ftunivottawa https://doi.org/10.20381/ruor-4334 2022-07-09T22:58:56Z Boundaries between air masses, called frontal zones, have been associated with vegetation boundaries (Bryson, 1966; Hare and Ritchie, 1972). Using gridded climate reanalysis data, we analyze the air masses and frontal zones of North America. The position of the July Arctic front varies significantly through the period 1948-2007, with a mean position similar to that found by Bryson (1966). The variability of the front position can be associated with changes in the general circulation; when the AO and SOI are positive (negative), the position of the July Arctic front is further north (south). There is also more variability in the July Arctic front position in Eastern versus Western Canada. When the July Arctic front is north (south) of the mean position, the boreal forest and tundra vegetation is more (less) productive. There is some evidence that climate warming is only starting to shift the July Arctic front to the north. This study was funded by the Natural Sciences and Engineering Research Council (NSERC) and the Polar Climate Stability Network (PCSN) project funded by the Canadian Foundation for Climate and Atmospheric Sciences (CFCAS). Thesis Arctic Tundra uO Research (University of Ottawa - uOttawa) Arctic Canada Ritchie ENVELOPE(-128.387,-128.387,54.916,54.916) Soi ENVELOPE(30.704,30.704,66.481,66.481) |
institution |
Open Polar |
collection |
uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
Arctic front North America reanalysis ERA-40 NCEP air mass |
spellingShingle |
Arctic front North America reanalysis ERA-40 NCEP air mass Ladd, Matthew Jared The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products |
topic_facet |
Arctic front North America reanalysis ERA-40 NCEP air mass |
description |
Boundaries between air masses, called frontal zones, have been associated with vegetation boundaries (Bryson, 1966; Hare and Ritchie, 1972). Using gridded climate reanalysis data, we analyze the air masses and frontal zones of North America. The position of the July Arctic front varies significantly through the period 1948-2007, with a mean position similar to that found by Bryson (1966). The variability of the front position can be associated with changes in the general circulation; when the AO and SOI are positive (negative), the position of the July Arctic front is further north (south). There is also more variability in the July Arctic front position in Eastern versus Western Canada. When the July Arctic front is north (south) of the mean position, the boreal forest and tundra vegetation is more (less) productive. There is some evidence that climate warming is only starting to shift the July Arctic front to the north. This study was funded by the Natural Sciences and Engineering Research Council (NSERC) and the Polar Climate Stability Network (PCSN) project funded by the Canadian Foundation for Climate and Atmospheric Sciences (CFCAS). |
author2 |
Gajewski, Konrad |
format |
Thesis |
author |
Ladd, Matthew Jared |
author_facet |
Ladd, Matthew Jared |
author_sort |
Ladd, Matthew Jared |
title |
The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products |
title_short |
The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products |
title_full |
The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products |
title_fullStr |
The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products |
title_full_unstemmed |
The July Arctic Front in North America from ECMWF ERA-40 and NCEP/NCAR Reanalysis Products |
title_sort |
july arctic front in north america from ecmwf era-40 and ncep/ncar reanalysis products |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2009 |
url |
http://hdl.handle.net/10393/19586 https://doi.org/10.20381/ruor-4334 |
long_lat |
ENVELOPE(-128.387,-128.387,54.916,54.916) ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Arctic Canada Ritchie Soi |
geographic_facet |
Arctic Canada Ritchie Soi |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_relation |
http://hdl.handle.net/10393/19586 http://dx.doi.org/10.20381/ruor-4334 |
op_doi |
https://doi.org/10.20381/ruor-4334 |
_version_ |
1766307024322166784 |