Alternative Indices for the Warm-Season NAO and Precipitation Variability in West
Observed precipitation records from Kangerlussuaq, Greenland, and atmospheric variables from the NCEP–NCAR reanalysis were used in a statistical analysis to elucidate controls on the seasonal variation of precipitation and develop indices that may be potentially useful for analyzing precipitation va...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.503.9116 2023-05-15T16:27:10+02:00 Alternative Indices for the Warm-Season NAO and Precipitation Variability in West Frank A. Aebly Qi Hu Sherilyn C. Fritz The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9116 http://snr.unl.edu/climate_change/research/Greenland.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9116 http://snr.unl.edu/climate_change/research/Greenland.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://snr.unl.edu/climate_change/research/Greenland.pdf text 2006 ftciteseerx 2016-01-08T09:16:27Z Observed precipitation records from Kangerlussuaq, Greenland, and atmospheric variables from the NCEP–NCAR reanalysis were used in a statistical analysis to elucidate controls on the seasonal variation of precipitation and develop indices that may be potentially useful for analyzing precipitation variability in paleoclimate and future climate change investigations. Three distinct patterns of correlation between pre-cipitation and the 500-hPa geopotential height were found to represent three dominant atmospheric pat-terns that strongly influence precipitation for different times of the year. All three patterns show a relation to the North Atlantic Oscillation signature found in the first empirical orthogonal function of the 500-hPa height field. Spatially dependent indices were developed based on the 500-hPa geopotential field. The correlation coefficients between precipitation at Kangerlussuaq and these indices range from 0.38 for winter to 0.64 for the warm season (May–September). The warm-season index herein is the first index reported in the literature that correlates significantly with precipitation during the warm season. Correla-tions of these indices with precipitation in Oslo, Norway, are high and are of opposite sign to west Green-land indices for the winter and summer months. This indicates that they are good representations of the atmospheric patterns associated with the North Atlantic Oscillation and the west Greenland–northern Europe “seesaw. ” High correlations are also found with precipitation measured at Nuuk, Qaqortoq, and Upernavik, Greenland. 1. Text Greenland Kangerlussuaq North Atlantic North Atlantic oscillation Nuuk Qaqortoq Upernavik Unknown Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Norway Nuuk ENVELOPE(-52.150,-52.150,68.717,68.717) Qaqortoq ENVELOPE(-46.036,-46.036,60.718,60.718) |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Observed precipitation records from Kangerlussuaq, Greenland, and atmospheric variables from the NCEP–NCAR reanalysis were used in a statistical analysis to elucidate controls on the seasonal variation of precipitation and develop indices that may be potentially useful for analyzing precipitation variability in paleoclimate and future climate change investigations. Three distinct patterns of correlation between pre-cipitation and the 500-hPa geopotential height were found to represent three dominant atmospheric pat-terns that strongly influence precipitation for different times of the year. All three patterns show a relation to the North Atlantic Oscillation signature found in the first empirical orthogonal function of the 500-hPa height field. Spatially dependent indices were developed based on the 500-hPa geopotential field. The correlation coefficients between precipitation at Kangerlussuaq and these indices range from 0.38 for winter to 0.64 for the warm season (May–September). The warm-season index herein is the first index reported in the literature that correlates significantly with precipitation during the warm season. Correla-tions of these indices with precipitation in Oslo, Norway, are high and are of opposite sign to west Green-land indices for the winter and summer months. This indicates that they are good representations of the atmospheric patterns associated with the North Atlantic Oscillation and the west Greenland–northern Europe “seesaw. ” High correlations are also found with precipitation measured at Nuuk, Qaqortoq, and Upernavik, Greenland. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Frank A. Aebly Qi Hu Sherilyn C. Fritz |
spellingShingle |
Frank A. Aebly Qi Hu Sherilyn C. Fritz Alternative Indices for the Warm-Season NAO and Precipitation Variability in West |
author_facet |
Frank A. Aebly Qi Hu Sherilyn C. Fritz |
author_sort |
Frank A. Aebly |
title |
Alternative Indices for the Warm-Season NAO and Precipitation Variability in West |
title_short |
Alternative Indices for the Warm-Season NAO and Precipitation Variability in West |
title_full |
Alternative Indices for the Warm-Season NAO and Precipitation Variability in West |
title_fullStr |
Alternative Indices for the Warm-Season NAO and Precipitation Variability in West |
title_full_unstemmed |
Alternative Indices for the Warm-Season NAO and Precipitation Variability in West |
title_sort |
alternative indices for the warm-season nao and precipitation variability in west |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9116 http://snr.unl.edu/climate_change/research/Greenland.pdf |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-52.150,-52.150,68.717,68.717) ENVELOPE(-46.036,-46.036,60.718,60.718) |
geographic |
Greenland Kangerlussuaq Norway Nuuk Qaqortoq |
geographic_facet |
Greenland Kangerlussuaq Norway Nuuk Qaqortoq |
genre |
Greenland Kangerlussuaq North Atlantic North Atlantic oscillation Nuuk Qaqortoq Upernavik |
genre_facet |
Greenland Kangerlussuaq North Atlantic North Atlantic oscillation Nuuk Qaqortoq Upernavik |
op_source |
http://snr.unl.edu/climate_change/research/Greenland.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9116 http://snr.unl.edu/climate_change/research/Greenland.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766016264339193856 |