Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest
Trends and periodicities in summer drought severity are investigated on a network of Canadian Drought Code (CDC) monthly average indices extending from central Quebec to western Manitoba and covering the instrumental period 19131998. The relationship and coherency between CDC indices and oceanatmo...
Published in: | Canadian Journal of Forest Research |
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2004
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Online Access: | http://dx.doi.org/10.1139/x03-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/x03-195 |
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crcansciencepubl:10.1139/x03-195 2024-06-23T07:51:29+00:00 Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest Girardin, Martin-Philippe Tardif, Jacques Flannigan, Mike D Wotton, B Mike Bergeron, Yves 2004 http://dx.doi.org/10.1139/x03-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/x03-195 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 34, issue 1, page 103-119 ISSN 0045-5067 1208-6037 journal-article 2004 crcansciencepubl https://doi.org/10.1139/x03-195 2024-06-13T04:10:50Z Trends and periodicities in summer drought severity are investigated on a network of Canadian Drought Code (CDC) monthly average indices extending from central Quebec to western Manitoba and covering the instrumental period 19131998. The relationship and coherency between CDC indices and oceanatmosphere circulation patterns are also examined. Trend analyses indicate that drought severity is unchanged in eastern and central Canada. Composite analyses indicate that for most of the corridor, severe drought seasons occur with a combination of positive 500-hPa geopotential height anomalies centered over the Gulf of Alaska and over the Baffin Bay. Additional severe drought seasons develop across the corridor in the presence of positive height anomalies located over or upstream of the affected regions. According to spectral analyses, the North Atlantic and the North Pacific circulation patterns modulate the drought variability at the decadal scale. Our results lead us to conclude that climate warming and the increases in the amount and frequency of precipitation in eastern Canada during the last century had no significant impact on summer drought severity. It is unlikely that linear climate change contributed to the change in the boreal forest dynamics observed over the past 150 years. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin North Atlantic Alaska Canadian Science Publishing Baffin Bay Canada Gulf of Alaska Pacific The Corridor ENVELOPE(78.139,78.139,-68.582,-68.582) Canadian Journal of Forest Research 34 1 103 119 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Trends and periodicities in summer drought severity are investigated on a network of Canadian Drought Code (CDC) monthly average indices extending from central Quebec to western Manitoba and covering the instrumental period 19131998. The relationship and coherency between CDC indices and oceanatmosphere circulation patterns are also examined. Trend analyses indicate that drought severity is unchanged in eastern and central Canada. Composite analyses indicate that for most of the corridor, severe drought seasons occur with a combination of positive 500-hPa geopotential height anomalies centered over the Gulf of Alaska and over the Baffin Bay. Additional severe drought seasons develop across the corridor in the presence of positive height anomalies located over or upstream of the affected regions. According to spectral analyses, the North Atlantic and the North Pacific circulation patterns modulate the drought variability at the decadal scale. Our results lead us to conclude that climate warming and the increases in the amount and frequency of precipitation in eastern Canada during the last century had no significant impact on summer drought severity. It is unlikely that linear climate change contributed to the change in the boreal forest dynamics observed over the past 150 years. |
format |
Article in Journal/Newspaper |
author |
Girardin, Martin-Philippe Tardif, Jacques Flannigan, Mike D Wotton, B Mike Bergeron, Yves |
spellingShingle |
Girardin, Martin-Philippe Tardif, Jacques Flannigan, Mike D Wotton, B Mike Bergeron, Yves Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest |
author_facet |
Girardin, Martin-Philippe Tardif, Jacques Flannigan, Mike D Wotton, B Mike Bergeron, Yves |
author_sort |
Girardin, Martin-Philippe |
title |
Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest |
title_short |
Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest |
title_full |
Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest |
title_fullStr |
Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest |
title_full_unstemmed |
Trends and periodicities in the Canadian Drought Code and their relationships with atmospheric circulation for the southern Canadian boreal forest |
title_sort |
trends and periodicities in the canadian drought code and their relationships with atmospheric circulation for the southern canadian boreal forest |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/x03-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/x03-195 |
long_lat |
ENVELOPE(78.139,78.139,-68.582,-68.582) |
geographic |
Baffin Bay Canada Gulf of Alaska Pacific The Corridor |
geographic_facet |
Baffin Bay Canada Gulf of Alaska Pacific The Corridor |
genre |
Baffin Bay Baffin Bay Baffin North Atlantic Alaska |
genre_facet |
Baffin Bay Baffin Bay Baffin North Atlantic Alaska |
op_source |
Canadian Journal of Forest Research volume 34, issue 1, page 103-119 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x03-195 |
container_title |
Canadian Journal of Forest Research |
container_volume |
34 |
container_issue |
1 |
container_start_page |
103 |
op_container_end_page |
119 |
_version_ |
1802642590519001088 |