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J W Waters - One of the best experts on this subject based on the ideXlab platform.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
Elizabeth M Stone - One of the best experts on this subject based on the ideXlab platform.
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transport of passive tracers in Baroclinic Wave life cycles
Journal of the Atmospheric Sciences, 1999Co-Authors: Elizabeth M Stone, William J Randel, John L StanfordAbstract:Abstract The transport of passive tracers in idealized Baroclinic Wave life cycles is studied using output from the National Center for Atmospheric Research Community Climate Model (CCM2). Two life cycles, LCn and LCs, are simulated, starting with Baroclinically unstable initial conditions similar to those used by Thorncroft et al. in their study of two life cycle paradigms. The two life cycles LCn and LCs have different initial horizontal wind shear structures that result in distinctive nonlinear development. In terms of potential vorticity–potential temperature (PV–theta) diagnostics, the LCn case is characterized by thinning troughs that are advected anticyclonically and equatorward, while the LCs case has broadening troughs that wrap up cyclonically and poleward. Four idealized passive tracers are included in the model to be advected by the semi-Lagrangian transport scheme of the CCM2, and their evolutions are investigated throughout the life cycles. Tracer budgets are analyzed in terms of the transfo...
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
John L Stanford - One of the best experts on this subject based on the ideXlab platform.
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transport of passive tracers in Baroclinic Wave life cycles
Journal of the Atmospheric Sciences, 1999Co-Authors: Elizabeth M Stone, William J Randel, John L StanfordAbstract:Abstract The transport of passive tracers in idealized Baroclinic Wave life cycles is studied using output from the National Center for Atmospheric Research Community Climate Model (CCM2). Two life cycles, LCn and LCs, are simulated, starting with Baroclinically unstable initial conditions similar to those used by Thorncroft et al. in their study of two life cycle paradigms. The two life cycles LCn and LCs have different initial horizontal wind shear structures that result in distinctive nonlinear development. In terms of potential vorticity–potential temperature (PV–theta) diagnostics, the LCn case is characterized by thinning troughs that are advected anticyclonically and equatorward, while the LCs case has broadening troughs that wrap up cyclonically and poleward. Four idealized passive tracers are included in the model to be advected by the semi-Lagrangian transport scheme of the CCM2, and their evolutions are investigated throughout the life cycles. Tracer budgets are analyzed in terms of the transfo...
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
William J Randel - One of the best experts on this subject based on the ideXlab platform.
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transport of passive tracers in Baroclinic Wave life cycles
Journal of the Atmospheric Sciences, 1999Co-Authors: Elizabeth M Stone, William J Randel, John L StanfordAbstract:Abstract The transport of passive tracers in idealized Baroclinic Wave life cycles is studied using output from the National Center for Atmospheric Research Community Climate Model (CCM2). Two life cycles, LCn and LCs, are simulated, starting with Baroclinically unstable initial conditions similar to those used by Thorncroft et al. in their study of two life cycle paradigms. The two life cycles LCn and LCs have different initial horizontal wind shear structures that result in distinctive nonlinear development. In terms of potential vorticity–potential temperature (PV–theta) diagnostics, the LCn case is characterized by thinning troughs that are advected anticyclonically and equatorward, while the LCs case has broadening troughs that wrap up cyclonically and poleward. Four idealized passive tracers are included in the model to be advected by the semi-Lagrangian transport scheme of the CCM2, and their evolutions are investigated throughout the life cycles. Tracer budgets are analyzed in terms of the transfo...
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
W G Read - One of the best experts on this subject based on the ideXlab platform.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.
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Baroclinic Wave variations observed in mls upper tropospheric water vapor
Geophysical Research Letters, 1996Co-Authors: Elizabeth M Stone, William J Randel, John L Stanford, W G Read, J W WatersAbstract:Upper tropospheric water vapor measurements from the UARS MicroWave Limb Sounder are used to investigate the structure and evolution of eastward traveling medium-scale Wave features in Southern Hemisphere summertime. The extratropical Southern Hemisphere summer circulation pattern is frequently dominated by medium scale Waves which exhibit life cycles of Baroclinic growth and barotropic decay. The water vapor field during such life cycles is examined here and found to be well correlated with meteorological fields derived from European Centre for Medium Range Weather Forecasts global analyses. From mid January to mid February 1992 several episodes of growth and decay in the amplitude of eastward traveling Waves are found in the water vapor and meteorological data at levels of the upper troposphere, with zonal Waves four, five and six being predominant modes. The water vapor data are compared with derived potential vorticity (PV) fields, with strong anticorrelation observed in middle and high latitudes. The results are consistent with model paradigms for the structure and evolution of Baroclinic disturbances, coupled with the known characteristics of high PV and low water vapor mixing ratios in lower stratospheric air parcels and the reverse for upper tropospheric air.