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Papers by Greg Spellman
Theoretical and Applied Climatology, Nov 21, 2023
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
doi:10.1029/2005GL024776.
Encyclopedia of Environmental Change
真の革命を夢見た男から託された約束を果たすため、キューバを訪れた日本人ルポライター。彼に襲いかかる国際テロ組織の謀略とは…？！今、最も注目される新鋭が贈る長編ハードボイルド・ロマン。
Encyclopedia of Environmental Change
Theoretical and Applied Climatology, Jan 28, 2016
A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in ... more A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in southwest Russia for the period 1961-2010. Gridded sea level pressure data was obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis. The resulting catalogue was analysed for frequency of individual types and groups of weather types to characterise long-term atmospheric circulation in this region. Overall, the most frequent type is anticyclonic (A) (23.3 %) followed by cyclonic (C) (11.9 %); however, there are some key seasonal patterns with westerly circulation being significantly more common in winter than summer. The utility of this synoptic classification is evaluated by modelling daily rainfall amounts. A low level of error is found using a simple model based on the prevailing weather type. Finally, characteristics of the circulation classification are compared to those for the original JC British Isles catalogue and a much more equal distribution of flow types is seen in the former classification.
Synoptic climatological approaches provide an effective framework for the analysis of atmospheric... more Synoptic climatological approaches provide an effective framework for the analysis of atmospheric circulation patterns and the relationship with environmental variables. The objective circulation classification method of Jenkinson and Collison is applied to the central Mediterranean for the period 1948–2021. In order to capture more synoptic information a modified version of the method is used to also develop a series using the 500 hPa surface. Results capture key modes of variability of the Mediterranean atmosphere. The technique is used to examine variability in daily nitrogen dioxide (NO2) concentration in Rome. Analysis shows an evident surface synoptic control in the winter months and consideration of upper patterns renders this approach more effective.
Journal of Applied Meteorology, 2002
Theoretical and Applied Climatology, 2016
A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in ... more A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in southwest Russia for the period 1961-2010. Gridded sea level pressure data was obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis. The resulting catalogue was analysed for frequency of individual types and groups of weather types to characterise long-term atmospheric circulation in this region. Overall, the most frequent type is anticyclonic (A) (23.3 %) followed by cyclonic (C) (11.9 %); however, there are some key seasonal patterns with westerly circulation being significantly more common in winter than summer. The utility of this synoptic classification is evaluated by modelling daily rainfall amounts. A low level of error is found using a simple model based on the prevailing weather type. Finally, characteristics of the circulation classification are compared to those for the original JC British Isles catalogue and a much more equal distribution of flow types is seen in the former classification.
Theoretical and Applied Climatology, Nov 21, 2023
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
Encyclopedia of Environmental Change
doi:10.1029/2005GL024776.
Encyclopedia of Environmental Change
真の革命を夢見た男から託された約束を果たすため、キューバを訪れた日本人ルポライター。彼に襲いかかる国際テロ組織の謀略とは…？！今、最も注目される新鋭が贈る長編ハードボイルド・ロマン。
Encyclopedia of Environmental Change
Theoretical and Applied Climatology, Jan 28, 2016
A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in ... more A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in southwest Russia for the period 1961-2010. Gridded sea level pressure data was obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis. The resulting catalogue was analysed for frequency of individual types and groups of weather types to characterise long-term atmospheric circulation in this region. Overall, the most frequent type is anticyclonic (A) (23.3 %) followed by cyclonic (C) (11.9 %); however, there are some key seasonal patterns with westerly circulation being significantly more common in winter than summer. The utility of this synoptic classification is evaluated by modelling daily rainfall amounts. A low level of error is found using a simple model based on the prevailing weather type. Finally, characteristics of the circulation classification are compared to those for the original JC British Isles catalogue and a much more equal distribution of flow types is seen in the former classification.
Synoptic climatological approaches provide an effective framework for the analysis of atmospheric... more Synoptic climatological approaches provide an effective framework for the analysis of atmospheric circulation patterns and the relationship with environmental variables. The objective circulation classification method of Jenkinson and Collison is applied to the central Mediterranean for the period 1948–2021. In order to capture more synoptic information a modified version of the method is used to also develop a series using the 500 hPa surface. Results capture key modes of variability of the Mediterranean atmosphere. The technique is used to examine variability in daily nitrogen dioxide (NO2) concentration in Rome. Analysis shows an evident surface synoptic control in the winter months and consideration of upper patterns renders this approach more effective.
Journal of Applied Meteorology, 2002
Theoretical and Applied Climatology, 2016
A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in ... more A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in southwest Russia for the period 1961-2010. Gridded sea level pressure data was obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis. The resulting catalogue was analysed for frequency of individual types and groups of weather types to characterise long-term atmospheric circulation in this region. Overall, the most frequent type is anticyclonic (A) (23.3 %) followed by cyclonic (C) (11.9 %); however, there are some key seasonal patterns with westerly circulation being significantly more common in winter than summer. The utility of this synoptic classification is evaluated by modelling daily rainfall amounts. A low level of error is found using a simple model based on the prevailing weather type. Finally, characteristics of the circulation classification are compared to those for the original JC British Isles catalogue and a much more equal distribution of flow types is seen in the former classification.