Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation
The interannual relationship between North American (NA) winter temperature and large-scale atmospheric circulation anomalies and its decadal variation are analyzed. NA temperature anomalies are dominated by two leading maximum covariance analysis (MCA) modes of NA surface temperature and Northern H...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/11/7/074001 |
| _version_ | 1797748581384323072 |
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| author | B Yu H Lin Z W Wu W J Merryfield |
| author_facet | B Yu H Lin Z W Wu W J Merryfield |
| author_sort | B Yu |
| collection | DOAJ |
| description | The interannual relationship between North American (NA) winter temperature and large-scale atmospheric circulation anomalies and its decadal variation are analyzed. NA temperature anomalies are dominated by two leading maximum covariance analysis (MCA) modes of NA surface temperature and Northern Hemisphere 500 hPa geopotential anomalies. A new teleconnection index, termed the Asian-Bering-North American (ABNA) pattern, is constructed from the normalized geopotential field after linearly removing the contribution of the Pacific-North American (PNA) pattern. The ABNA pattern is sustained by synoptic eddy forcing. The first MCA mode of NA surface temperature is highly correlated with the PNA and ABNA teleconnections, and the second mode with the North Atlantic Oscillation (NAO). This indicates that NA temperature is largely controlled by these three large-scale atmospheric patterns, i.e., the PNA, ABNA and NAO. These temperature-circulation relationships appear stationary in the 20th century. |
| first_indexed | 2024-03-12T16:06:51Z |
| format | Article |
| id | doaj.art-b606948dcad8435ebb0d819cc2d4de56 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T16:06:51Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-b606948dcad8435ebb0d819cc2d4de562023-08-09T14:19:58ZengIOP PublishingEnvironmental Research Letters1748-93262016-01-0111707400110.1088/1748-9326/11/7/074001Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variationB Yu0H Lin1Z W Wu2W J Merryfield3Climate Research Division, Environment and Climate Change Canada, Toronto, CanadaMeteorological Research Division, Environment and Climate Change Canada, Dorval, CanadaEarth System Modeling Center, Nanjing University of Information Science and Technology , Nanjing, People’s Republic of ChinaCanadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, CanadaThe interannual relationship between North American (NA) winter temperature and large-scale atmospheric circulation anomalies and its decadal variation are analyzed. NA temperature anomalies are dominated by two leading maximum covariance analysis (MCA) modes of NA surface temperature and Northern Hemisphere 500 hPa geopotential anomalies. A new teleconnection index, termed the Asian-Bering-North American (ABNA) pattern, is constructed from the normalized geopotential field after linearly removing the contribution of the Pacific-North American (PNA) pattern. The ABNA pattern is sustained by synoptic eddy forcing. The first MCA mode of NA surface temperature is highly correlated with the PNA and ABNA teleconnections, and the second mode with the North Atlantic Oscillation (NAO). This indicates that NA temperature is largely controlled by these three large-scale atmospheric patterns, i.e., the PNA, ABNA and NAO. These temperature-circulation relationships appear stationary in the 20th century.https://doi.org/10.1088/1748-9326/11/7/074001North American temperature variabilityatmospheric teleconnectioninterannual temperature-circulation relationshipdecadal variation |
| spellingShingle | B Yu H Lin Z W Wu W J Merryfield Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation Environmental Research Letters North American temperature variability atmospheric teleconnection interannual temperature-circulation relationship decadal variation |
| title | Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation |
| title_full | Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation |
| title_fullStr | Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation |
| title_full_unstemmed | Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation |
| title_short | Relationship between North American winter temperature and large-scale atmospheric circulation anomalies and its decadal variation |
| title_sort | relationship between north american winter temperature and large scale atmospheric circulation anomalies and its decadal variation |
| topic | North American temperature variability atmospheric teleconnection interannual temperature-circulation relationship decadal variation |
| url | https://doi.org/10.1088/1748-9326/11/7/074001 |
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